20040885 Ver 1_Complete File_20040528

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Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
May 23, 2005
DWQ Project # 04-0885
Durham County
Mr. Oliver Alphin, Jr.
1910 Sedwick Road, Suite # 200A
Durham, NC.27713
Subject Property: Alphin HWY # 55 Retail
APPROVAL OF STORMWATER MANAGEMENT PLAN
Dear Mr. Alphin:
On April 28, 2005, the Division of Water Quality (DWQ) received the revised storm water management
plan prepared by your engineer, Mr. Kenneth B. Wrenn, P.E., of Wrenn Engineering Company. This Plan
has been reviewed and satisfies the storm water management conditions of the Isolated Wetland Permit
No 13 Certification issued on July 20, 2004.
The structural storm water practices as approved by DWQ as well as drainage patterns must be
maintained in perpetuity. No changes to the structural storm water practices shall be made without
written authorization from the Division of Water Quality. Storm water easements shall be recorded for a
distance of at least 10 feet on each side of all storm water conveyances on all lots containing these
structures including future access for maintenance. The storm water easements shall allow for the ability
to maintain the structures, perform corrective actions as described above and shall provide protection of
the structures from potential alternations by future property owners.
This letter completes the review of the Division of Water Quality under Section 401 of the Clean Water
Act. If you have any questions, please telephone Mr. Samuel A. Aghimien at 919-733-3574.
Sincerely,
/I l
CBK/SAA
Cyndi B. Karoly
DWQ, 401 Oversight/Express Permitting Unit
cc: DWQ Raleigh Regional Office
USACE Raleigh Regulatory Field Office
File Copy
Central Files
Kenneth Wrenn, Wrenn Engr co, 1910 Sedgewick Road, Suite #200-C, Durham, NC. 27713
Filename: 04-0885 Stormwater Approval Alphin HWY # 55, 5-17-05
401 Oversight/Express Review Permitting Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Ralegh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet: litter,h2o_enr.state.nc.us%ncwetiands
None Caro ina
Naturally
An Equal Opportunity/Affirmative Action Employer- 50% Recycled/10% Post Consumer Paper
Project Name: AHR#55
Project No. DWQ 04-0885
SUBMITTED DESIGN.- 1 REQUIRED DESIGN:
Date 5/11/2005
elevations

Permanent Pool (ft) 257
Temporary Pool (ft) 258.68 1.68 ft. depth ok
areas
Permanent Pool SA (sq ft) 9599 6308 sq. ft. ok
Drainage Area (ac) 6.137
Impervious Area (ac) 5.18 84.4 % -
Forebay (ft2) 1379 14.36608 % ok
High Marsh (ft2) 3448 35.9 % ok
Low Marsh (ft2) 3450 35.9 % ok
Micropool (ft2) 1322 13.772268 % ok
100%
volumes
Temporary Pool (cu ft) 18166 18037 cu. ft. ok
other parameters
SA/DA 3.5272 2.36 -
Orifice Diameter (in) 2 0.10 cfs drawdown -
Design Rainfall (in) 1 2.2 day drawdown ok
Linear Interpolation of Correct SAIDA ***
% Impervious
Next Lowest 80
Project Impervious 84.4
Next Highest 85
l /
0 ft. Permanent Pool Depth
SA/DA from Table
2.06
2.36
2.4

pi:,-- ?
S
Wrenn
Engineering
Company
Cyndi B. Karoly
N.C. Division of Water Quality
Wetlands/401 Unit
2321 Crabtree Blvd.
Raleigh, N.C.
27604-2260
Re: Alphin Property, Durham, N.C. (Cape Fear Basin.)
Final revised storm water management plan for WQC P . ' 4 5
Cyndi,
4-27-05
Please find attached one copy of the isolated wetland permit approval letter and three copies
of the revised final written storm water management plan for the above referenced project. Each
copy includes the following information:
1. A copy of the Jan 31, 2005 letter from NCDWQ requesting more information from us.
2. A written response letter itemizing each of the review comments from NCDWQ.
3. A written narrative.
4. A site plan. /
5. A BMP worksheet.
6. A site specific operations and maintenance agreement.
7. Supporting calculations including a stage-storage and depth regime worksheet.
8. A copy of the deed notification recorded in the Durham County Register of Deeds.
9. A copy of the wetland plat signed off by the Corps of Engineers.
10. A storm water management site plan.
11. An erosion control plan.
If you have any questions or concerns, please feel free to contact me at my office.
Sincerely, D
?? APR 2 8 2005
Ktnnet . Arenn, C
.
President I
WETLANSANG S ORW TERBRANCH
1910 Sedwick Rd., Suite 200-C
Durham, N.C. 27713
Voice 919.806.5082
FAX [phone]
ken.wrennna.verizon.net
Cc. Wendell Alphin, Jr.

W ATF
Q
U
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P. E. Director
Division of Water Quality
0
Nt=r Golsen H. Sullins, Deputy Director
Division of Water Quality

July 20, 2004

W. Oliver Alphin, Jr. <'
1910 Sedwick Road
Suite 200A
Durham, NC 27713
Dear Mr. Alphin:
RE: Isolated Wetland Permit Approval
Subject property: Alphin Property at NC 55 near NC 54
WQC Project # 04-0885
Durham County

Attached hereto is a copy of Isolated Wetland Permit No. 13 issued to Oliver Alphin, Jr.
for the Alphin Property project dated July 20, 2004.
If we can be of further assistance, please do not hesitate to contact us.
Sincerely,
Attachments
Klime , P.E.
CC: Steve Mitchell, Raleigh DWQ Regional Office
File copy
Central files
Kenneth Wrenn, Wrenn Engineering Company, 1910 Sedgewick Rd, Suite 200-C,
Durham, NC 27713
Todd Tugwell, US Army Corps of Engineers - Raleigh Field Office
Filename: 040885Aplhin(Durham)ISOcover
N. C. Division of Water Quality, 401 Wetlands Certification Unit,
1650 Mail Service Center, Raleigh, NC 27699-1650 (Mailing Address)
91491 Crahtree Blvd.. Raleiah. NC 27604-2260 (Location)

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Applicant:
Page 2 of 3
Date:
3. All temporary sediment and erosion control measures placed in wetlands or waters shall be
removed and natural grade restored after the Division of Land Resources has released the
project;
4. Measures shall be taken to prevent live or fresh concrete from coming into contact with
waters of the state until the concrete had hardened;
5. An additional condition is that a final written stormwater management plan shall be approved
by this Office before the impacts specified in this Permit occur. The stormwater management
plan must include plans and specifications for an extended detention wetland facility
designed to remove 85% TSS according to the most recent NC DENR Stormwater Best
Management Practices Manual. Also, before any permanent building is occupied at the
subject site, the facilities, as approved by this Office shall constructed and operational, and
the stormwater management plan, as approved by this Office shall be implemented;
6. Upon completion of this project, the applicant shall complete and return the enclosed "Permit
of Completion Form" to notify DWQ that all work included in the Wetland Permit has been
completed. The responsible party shall complete the attached form and return it to the
401/Wedand Unit of the Division of Water Quality;
7. Deed Notifications: Deed notifications or similar mechanisms shall be placed on all retained
jurisdictional wetlands, waters and protective buffers in order to assure compliance for future
wetland, water and buffer impact. These mechanisms shall be put in place prior to impacting any
wetlands, waters and/or buffers approved for impact under this Certification Approval and
Authorization Certificate. A sample deed notification can be downloaded from the 401/Wetlands Unit
web site at http://h2o.enr.state.nc.us/ncwetlands. The text of the sample deed notification may be
modified as appropriate to suit to this project.
If this Permit is unacceptable to you, you have the right to an adjudicatory hearing upon written request
within sixty (60) days following receipt of this Permit. This request must be in the form of a written
petition conforming to Chapter 150B of the North Carolina General Statutes and filed with the Office of
Administrative Hearings, 6714 Mail Service Center, Raleigh, N.C. 27699-6714. If modifications are
made to an original Permit, you have the right to an adjudicatory hearing on the modifications upon
written request within sixty (60) days following receipt of the Permit. Unless such demands are made,
this Permit shall be final and binding.
This the 20th day of July 2004
DIVISION OF WATER QUALITY
AWK/jrd
4 . Klimek,.E.
Filename: 040885Alphin(Durham)ISOapp
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Michael F. Easley, Governor
January 31, 2005
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Mr. Oliver Alphin, Jr.
1910 Sedwick Road, Suite 200A
Durham, NC 27713
Subject Property: Alphin Property at NC 55 near NC 54
REQUEST FOR MORE INFORMATION-Stormwater Management Plan
William G. Ross, Jr„ Secretary
Alan W. Klimek, RE., Director
DWQ Project # 04-0885
Durham County
On January 11, 2005, the Division of Water Quality (DWQ) received the Storm Water Management Plan
prepared by your engineer, Mr. Kenneth Wrenn, P.E., of Wrenn Engineering Company, to comply with
the conditions of Isolated Wetland Permit No. 13 issued on July 20, 2004.
The Plan was unacceptable for the following reasons:
The extended detention wetland must be designed in accordance with the 1999 Stormwater BMP Manual.
This is located on the DWQ website: hn://h2o.enr.state.nc.us/ncwetlands/mitresto.htmi. The
deficiencies in the submitted plan included the following:
• Ratios for each portion of the wetland must be in closer proximity to those in the Manual.
• Extended detention wetland depths must be in accordance with the BMP Manual.
• The amount of impervious surface area exceeds 70%; DWQ has calculated your on-site
impervious surface area to be 83.95%. Please explain this difference.
• Please provide information regarding inlet and outlet velocities.
Please respond within three (3) weeks of the date of this letter by sending three (3) copies this information
in writing. This letter only addresses the Stormwater Management Plan review and does not authorize
any impacts to wetlands or streams until the Plans are approved. Please email Ms. Cynthia Van Der
Wiele, Ph.D. at cynthia.vanderwieleCibncmail.net if you have any questions regarding these issues.
Sincerely,
?r_' A 1 ??4
Cyndi B. Karoly
DWQ, Wetlands / 401 Unit
CBK/cvdw
cc: DWQ Raleigh Regional Office
USACE Raleigh Regulatory Field Office
File Copy
Central Files
Kenneth Wrenn, Wrenn Engineering Co., 1910 Sedwick Rd., Suite 200-C, Durham, NC 27713
401 Wetlands CerWmtion Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650 One
2321 Crabtree Boulevard, Sub 250, Raleigh, Nord, Carolina 276N NovwCarolina
Phnnu• 010-749_170CI / CAY 010_7"_aQGQ / In -f- hNn•/Mnn n... n1 .s ........ /.........11. -A-
Wrenn
Engineering
Company
Cyndi B. Karoly
N.C. Division of Water Quality
Wetlands/401 Unit
2321 Crabtree Blvd.
Raleigh, N.C.
27604-2260
%Jpqq? %

1910 Sedwick Rd., Suite 200-0
Durham, N.C. 27713
Voice 919.806.5082
FAX [phone]
4.
SJ. 2._ V
??
Vbxs?s 1
- >>-
4-27-05
Re: Alphin Property, Durham, N.C., WQC Project # 04-0885 (Cape Fear Basin.)
Written Review Comments on Final Written Storm Water Management Plan (1/10/05)
Cyndi,
I received the written comments from you regarding the first review. It took some time to
coordinate the revisions to the plans due to review comments #1 and #2. Following is an
itemized response to each of your review comments.
"Ratios for each portion of the wetland must be in closer proximity to those in the
manual."
Response: The ratios for each portion of the pond have been revised to conform to
the 1999 BMP State Manual depth regime ratios provided on page 18 of the manual.
The following is a breakdown of the 1999 BMP Manual depth regime ratio goals
and the actual design depth regime ratios:
Goals-
70% of surface area of the permanent pool between depth of 0" -18" with 35%
between depth of 0" - 9" and 35% between depth of 9" and 18".
15% of surface area of the permanent pool between depth of 18"-36" (a micropool)
located at the outlet device.
15% of surface area devoted to a forebay as outlined on the EDW worksheet.
Design-
35.92% between 0" - 9" depths
35.94% between 9" -18" depths
13.77% between 18" - 36" depths (micropool only)
14.37% between 0" - 36" depths (forebay only)
2. "Extended detention wetland depths must be in accordance with the BMP Manual."
Response: The depths have been revised to conform to the 1999 ]IMP State Manual.
The response to comment #1 above addresses the depth regimes. See the revised
grading plan and stage-storage relationship worksheet.
3. "The amount of impervious surface area exceeds 70%; DWQ has calculated your on-site
impervious area to be 83.95%. Please explain the difference."
Response: The supporting calculations show that the total project and parcel area is
7.36 acres. All 5.152 acres of site derived imperviousness drains to the pond.
Therefore, 5.152 acres / 7.36 acres = 0.70 or 70% imperviousness. The 83.95%
calculated by DWQ is the 5.152 acres of onsite derived impervious area divided by
the contributing 6.137 acres of drainage area routed to the wetland. The 84.41%
calculated for determining the SA/DA ratio includes 0.028 ac. of offsite derived
impervious area in addition to the 5.152 ac. of onsite derived impervious area or
5.180 ac. 16.137 ac. = 84.41%.
4. "Please provide information regarding inlet and outlet velocities."
Response: The 10yr peak flow at Out -2 = 32.6 cfs. The 10yr outlet velocity of 30"
rep pond barrel (OUT2) = 6.64111s.
Note that the upper reach of the receiving channel is lined with rip-rap to dissipate
the velocity. The remainder of the receiving channel is lined with a poly netting
geosynthetic and fescue grass. The netting will aid in establishing a strong root
connection between the fescue grass and the sloped channel sides. The 10yr channel
velocity is 4.46 fl/s.
The 10yr peak flow into the pond from YCB-1 is 32.3 cis. The 10yr inlet velocity of
the 36" rcp into the pond from YCB-1 is 4.57 fl/s.
Please contact me at my office if there is anything I can assist you with.
Sin Merely,
K nne aB. Wrenn, P.E.
President
t
Cc. Wendell Alphin, Jr.
Proiect Narrative:
This project is comprised of a 7.36 acre property that is proposed to be developed in two
phases.
Phase One involves piping 5391.f. of an un-named isolated intermittent stream of the Cape
Fear basin, constructing an extended detention wetland BMP designed for future buildout of 70%
impervious, and converting the existing house to a small retail operation.
Phase Two involves developing the entire property as commercial uses and reaching the
maximum allowed 70% imperviousness. All stormwater runoff from impervious areas associated
with the proposed development will be routed to the extended detention wetland.
Site Plan: (See attached)
There are four drawings in the set as follows:
"WQl" drawing illustrates the phase one and phase two development of the project site. The
extended detention wetland is being constructed with phase one to handle full buildout of the site.
The full buildout will be 70% impervious as indicated on the original PCN application on file at
your office. Note that the actual building and parking arrangement may vary some, but the
impervious area will be kept to no more than 70%.
"WQ2" drawing illustrates the details of the wetland facility.
"C-3A" drawing illustrates the erosion control plan for phase one.
"C-3B" drawing illustrates the erosion control plan details for phase one.
Extended Detention Wetland Worksheet: (See attached)
An "Extended Detention Wetland Worksheet" has been provided. See the attached.
A Site SmWc O»erations and Maintenance Agreement: (See attached)
A signed and notorized O&M document is provided. The original document was submitted
with the original submittal. See attached copies.
Suonortine Calculations:
Extended Detention Wetland (EDW) for 85% TSS reduction. Note that the contributing drainage
areas to the EDW are separated into onsite and offshe areas that either drain directly to the
forebay or bypass the forebay and drain directly into the pond
Phase 1 Data:
Onsite DA to EDW bypassing forebay =1.562 ac.
Onsite DA to EDW via forebay = 4.082 ac.
Mite DA to EDW bypassing forebay = 0.013 ac.
Offsite DA to EDW via forebay = 0.210 ac.
Total DA to EDW = 5.867 ac.
% imperviousness of 7.36 ac. site = 3.83%
Phase 2 Data:
Onsite DA to EDW bypassing forebay = 0.480 ac.
Onsite DA to EDW via forebay = 5.629 ac.
Offske DA to EDW bypassing forebay = 0.000 ac.
Offsite DA to EDW via forebay = 0.028 ac.
Total DA to EDW = 6.137 ac.
Impervious area to EDW = 5.180 ac (inc. 0.028 ac. offsite)
% imperviousness of 7.36 ac. project site = 70.0%
% imperviousness to EDW = 84.41 %, SA/DA = 3.5272.
EDW surface area required = 0.2165 ac. (9,431 s.f.)
EDW surface area provided = 0.2204 ac. (9,599 s.f.)
Following are Responses to "Required Items Checklist" on the BMP Worksheet:
Control of 1" storm- Depth of 1" rainfall = 0.05 + (0.009 x 84.41 %) = 0.810 in r/o.
Required Min. Volume of 1" rainfall = 0.810 in x 6.137 ac. x 43,560 s.f. / 12" = 18,045 c.f.
Provided Water Quality Pool (WQP) Volume =18,166 c.f.
Basin Side Slopes- 3:1
Planting Plan for Marsh Areas with Plant Species and Planting Densities Provided- Yes.
See Planting Plan.
Vegetation above the Permanent Pool Specified- Yes. See Planting Plan.
Emergency Drain Provided- Yes. See Detail Plan for detail of 8" bottom drain.
Temporary Pool Draw Down between 2 to 5 days- The temporary WQP draw down time =
approximately 2.5 days. See attached draw down worksheet.
Sediment Storage is Provided In the Permanent Pool- The Forebay and Micro-Pool are both
specified to be over excavated to elevation 253.00' to account for sediment storage. The
sediment storage volume is 1,064 c.f.
Sediment Disposal Area is Provided- An area has been specified on the plan for sediment
disposal. The area drains to the pond.
Access Provided for Maintenance- The basin facility is provided with adequate access to all
areas of the facility. See plans.
A Site Specific Operation and Maintenance (O&M) Agreement Plan Provided- A signed
and notorized O&M agreement is provided. See attached copies.
All Drainage Areas that Contribute to the EDW are Delineated on the Site Plan- See plan.
Plan Details for the Wetland are Provided- See plan and details.
Plan Details for the Inlet and Outlet are Provided- See plan and details.
Following is an itemized list of the Conditions of Permit and how we meet the objectives to
satisfy the final written storm water management plan:
1. Impacts Approved.
The proposed 539 linear feet of impact to the stream has not changed. The pipe size has been
revised to two 54" rcp culverts to satisfy the local stormwater 10-yr peak flow requirements.
2. Appropriate Sedimentation and Erosion Control Practices Must be Utilized.
A copy of the erosion control plan for phase one has been included. The plan meets or
exceeds the requirements of the state. The extended detention wetland (EDW) will serve as a
master sediment basin during phase one construction and will be cleaned out at the end of
phase one construction and vegetated and made operational. No permanent buildings will be
occupied before the EDW is made fully operational and the stormwater management plan is
implemented as approved by NCDWQ wetland unit. Phase two erosion control will filter the
sediment borne runoff before it enters the EDW. This will be done by excavating a pit
around the EDW that will serve as a Type "A" sediment basin. This will ensure that
significant amounts of suspended sediment will not contaminate the EDW during phase two
construction.
3. All Temporary Sediment and Erosion Control Measures Placed in Wetlands or Waters
shall be Removed and Natural Grade Restored after the Division of Land Resources has
Released the Project.
No temporary measures are proposed to be placed in wetlands or waters. All sediment and
erosion control measures will be removed after the Durham County Sedimentation and
Erosion Control Department has inspected and approved the site at final inspection.
4. Measures will be Taken to Prevent Live or Fresh Concrete from Coming into Contact
with Waters of the State until the Concrete has Hardened.
The plans specify that the culvert laying operation must begin during dry weather. During
dry weather there is normally no visible flow occurring in the stream being piped. The
culvert and headwall are both planned to be pre-cast. Depending on the availability of the
pre-cast headwalls at the time of construction, it may become necessary to cast the headwalls
in place. No fresh concrete will be allowed to come in contact with arty waters.
5. Final Written Stormwater Mangement Plan Required before Permitted Impacts Occur.
See attached.
6. Upon Completion of this Project, the Applicant shall Complete and Return the "Permit
of Completion Form".
This requirement will be done.
7. Deed Notification shall be Placed on all Retained Jurisdictional Wetlands, Waters, and
Protective Buffers in order to Assure Compliance for Future Wetland, Water, and
Buffer Impacts.
A deed notification has been placed on the property and is on record at the Durham County
Register of Deeds. See attached recorded deed notification.
DWQ Project No. t U C? PYS
DIVISM OF WATER QUALITY - 40'1 E7CiMW DETENTION (and POCKET' WE' MD WORKSHEET
PROJECT INFOWATTON (please complete the folLmng intrn wfion):
Project Name : L P t-t1 O %Q Q c iwr t-
ContadPerson: is t3Jh2Phone Nu (`A%qi
For projects with multiple basins, specify which basin this worksheet applies to: i?l 11?
Permanent Pool Elevation Z5 7. C R
Temporary Pool Elevation 7-5$.110 ft
sq. ft
Permanent Pod Sunfaoe Area 905j'
Drainage Area L.,.07 ac.
Impervious Area 5,180 ac.
Forebay Surface Area 13-79 s% ft
Marsh 0"-9" Surface Area sq. ft.
Marsh 9"-113' Surface Area ?0 .9% ft.
Micro Pool Surface Area I. '37-Z sq. ft.
(elevation of the orifice invert out)
(elevation of the outlet structure invert in)
(water surface area at permanent pod elevation)
(on-site and off-site drainage to the basin)
(or"ite and oft-sits drainage to the basin)
(at permanent pod elevation approximately 15V
(at permanent pool elevation approximately 35V
(at permanent pod elevation approximately 35%r
(at permanent pool elevation approximately 15V
Temporary Pool Volume 113.11 (?(u cu. ft (volume detained on top of the permanent pool)
SAIDA used '' , Z 7 Z (surface area to drainage area ratiop
Diameter of Orifice 2.0 in. (draw down orifice diameter)
11. REQURED HEMS CHECKLIST
Initial in the space provided to indicate the following design requirements have been met and supporting docurrrentation is attached. //a
ragd%1Mw1AasnolAwma4 abaci aw arrp/en hkw ofwhy. At a minimum, a complete ska nwater rranagarent plan submittal includes
a worksheet for each BMP, design calculations, plans and specifications showing all BM's and outlet structure details, a detailed
drainage plan and a fully executed operation and maintenance agreement An incomplete submittal package will result in a request for
additional information and will substantially delay final review and approval of the project
Applicants Initials
11 3 V-% The temporary pod controls runoff from the 1 inch rain.
iL g w The basin side slopes are no steeper than 3:1.
J a ??N A planting plan for the marsh areas with plant species and densities is provided.
,190 Vegetation above the permanent pool elevation is specified.
%Uw An emergency drain is provided to drain the basin.
42,; The temporary pod draws down in 2 to 5 days.
U,j-Sediment storage is provided in the permanent pool.
L'R A sedhrrhent disposal area is provided.
' Dees is provided for maintenance.
1t;l t: A site specific, signed and notarized operation and maintenance agreement is provided.
w The drainage area (including any offslte area) is delineated on a site plan.
w case is provided for maintenance.
IU; w Plan details for the wetland are provided.
V.9 v Plan detals for the inlet and outlet are provided.
VLZ&--3 A silo specific operation and maintenance agreement, signed and notarized by the responsible party is provided (see
http:lAh2o.ehnr.state.nc.ushhcwetlahds/oahdm.doc).
Pocket Wetlands have different design parameters and are only assumed to remove 35% TSS - See pp. 19 and 20 of the NC DENR
Stomhwater BMP Manual, April 1999.10% open water, 50% high mash, 40% low marsh.
Stage-storage relationship for Alphin Hwy #55 project extended detention wetland
Note that the design invert elevation of the pond is 254.00. The pond will be overexcavated to 253.00 to account for sedimentation.
ELEV.

ft a.s.I. AREA
FOREBAY
s.f_ AREA
POND
s.f. AREA
TOTAL
s.f. INCR. VOL.
FOREBAY
C.f. INCR. VOL.
POND
C.f. ACCUM. VOL
FOREBAY
C.f. ACCUM. VOL
POND
C.f. ACCUM. VOL
TOTAL
C.f. WQP VOL
TOTAL
c.f.
253.00 229 644 873 0 0 0 0 0
254.00 362 892 1254 0 0 0 0 0
255.00 522 1165 1687 442 1029 442 1029 1471
255.50 612 1322 1934 284 622 726 1650 2376
256.00 709 3613 4322 330 1234 1056 2884 3940
256.25 1171 4772 5943 235 1048 1291 3932 5223
256.50 1239 5469 6708 301 1280 1592 5212 6804
256.75 1308 5999 7307 318 1434 1910 6646 8556
257.00 1379 8220 9599 336 1777 2246 8423 10669
257.50 10313 15647 4978
258.00 11050 20988 10319
258.50 11778 26695 16026
258.68 12001 28835 18166
259.00 12478 32752
260.00 14004 , 45993

Depth Re gimes b 19 99 NCDWQ BMP Manual Requirements

Goal Depth
Regime POND
Area % TOTAL
Pond Area Notes
35% 0" - 9" 3448 35.92%
35% 9" - 18" 3450 35.94%
15% 18" - 36" 1322 13.770%/( micropool area only
15% 0" - 36" 1379 14.37% forebay area only
total 9599 100.00%
DRAWDOWN TIME FOR 7' ORIFICE (INVERT AT 257.00)
FOR ALPHIN HWY 66 RETAIL EXTENDED DETOMN WETLAND
STORM POOL VOLUME= 18,150 C.F.
STARTING STORM POOL ELEVATION= 258.63
NORMAL POOL ELEVATION- 257-W PONE)
TIME INTERVAL OF 10 MIN. ELEV.
258.68
258.00
257.00

POND POND
AREA VOLUME
12,044 18,150
11,036 10,318
9,599 0
625 2140 0
068 4x85 3153 257.50 1600 0.021 1263
M
600 0.114
0.113 68.11
67.94 13,140 25
13,072 25824
6
2
1 2150
2160 .
0.oee
067
0 4086
40.47 8117 _

,WW2
8 257.50

257.49 3510

671) 0.021

.020 212 43

.241
700 0.113 67.77 .
13,004 2
8 .
1
3800
0= 12.96
710
720 0.113
0.112 87.60
57A 12.937 286.23
12,669 28622 2170
2180 007
1
0.007 1 40]8
40.08 6,31
/p61 257.49
257.46
3810 11.95
730 0.112 072 12,902 25622 2190 0.068 3989 4.961 257.46 3060
1000 0A19
019
0 11.66
46
11
740 112
0 87.98 12,735 26821 7101) 0.006 39.70 4.912 257.48 . .
760 .
0.112 8691 12.869 25620 2210 0.068 3OA0 4,817, 257.47 3670 OA19
018
0 1127
11AS
Too 0.111 88.73 12.801 20830 2720 DAN 3031 4.831 257.47 .
770
780
790 0.111
0.111
0.110 86.58
68.30
8821 12,535 256.19
12,468 258.19
12,402 238.16
16
336 258
2 22.90
2240
760
2280 0.005
0.005
0.36
0.004 39.12
36.92
36.73
36.64 4.794
4.755
4,716
4,076 257.48
257.46
287.48
257.451
3700
1710
3 0.018
OA76
0.017
OA17 10.86
10.
10.49
10
800
S1
820 0.110
0.11
2l
0.13 80.04
08.97
65.70 .
.
1
1 280.17
1
12,204 250.16 2210
7]60 0.094
O.OD4 36.36
36.16 1,870
4.61)} 257.
257.45 3710 9.977
0.017
016
0 10.}
991
912
610 0.100 86.52 12139 256.16
78
268 2280
2300 0.003
063
0 3796
3717 4,861
4,323 257.44
257A4 3750
3M0 .
OA78 9.52
NO 0.109 8336 .
12.073 . 7 3770 oA16 033
850
NO 0.109
0.106 85.111
6501 12ANI 266.15
11,943 256.14 2310
212.9 Dim
0.062 17.57
3738 4468
4.450 .43
25
257.43 3700 me
0.918 913
694
870 0.13 64.A7 11,878 258.14
13
269 ?330
2340 0.062
0
062 37.19
3091) 4.413
43M 257.43
257.42 3780 Ma 8.74
880
8"0
000 0.}3
0.107
0.101 64.66
64.49
6431 .
11,814
11749 250.12
1'{.666 258.12 2360
2360 .
0.061
0.081 Se.eo
SSA7 4
4.33 257.9
20TA2 3910
38'.31) 0014
OA14 936
636
910 0.107 6414 11,821 L M11 2.770 0.001 30.41 4 257.41
1)p 0.107 63.97 }1,567 251).11 2060 0.080 3671 257.41
930
940 0.105
0.108 6320
63M 11.493 2SL10
11,429 206.10 231)0
2400 0.OSD
0.080 36.3
35.84 4194
4156 257.41
287.40
950 0.108 63.45 11,308 256.99 2410 OA6B 35.84 4123 267.40
900 0
105 6323 11.303 25LOO 2420 0.058 35.45 4.067 257.40
970
Bhp .
0.105
0
105 63.11
6293 11.240 286.06
11.177 255.07 2430
2440 0.050
0.056 35.25
35.06 4
4017 25739
257.39
990
tow .
0.108
104
0 82.78
6259 11,114 269.07
11 1 25LOO 2450
2480 0.056
0.058 34.87
34.68 3.982
3,947 257.39
267.98
1010 .
0.104 67.41 10.969 256.08 2470 0.057 34.48 3.913 257.30
1010 104
0 8224 927 266.06
10 2480 0.37 3429 3.879 257.38
1030 .
0.103 82.07 .
10.886 255.05 2490 0.057 34.10 3.944 257.17
267
37
1010
1050 0.13
0.13 61.00
6112 10,0.03 25&04
10,741 258.04 2300
2310 0.057
0.050 33.90
33.71 811
3.771 .
257.37
1060
1070 0.103
0.102 8155
8}38 10.579 255.03
10018 209.3 2510
2530 0.058
0.056 3352
33.33 3.143
3.110 257.35
257.30
}000 102
0 61
21 10,567 258.02 2540 0.055 33.11 3,077 25736
}090 .
0.102 .
01.03 10.495 238.02 2550 moss 32-W 3.844 257.36
1100 0.101 8088 10,435 258.01 2560 0.o66 32.75 3.611 25715
1110
1120
1130
1140 00101
0.107
0.101
toO
O BO.SB
50.51
00.34
15
50 10,374 MAD
10,314 258.00
10,293 257A9
10,193 257.3 2570
2500
261)0
2000 0.054
0.064
OA84
0.053 MIS
32.90
3217
St 9TD
3.644
3,514
3.482 25735
257.34
287.34
257.34
1160 .
D.tOD .
5995 101133 25746 2810 0,00 31.78 3,450 , 257.33
1160 0.100 59.76 10.074 25796 2020 0.03 31.59 3,410 267.31
} 170 0.089 59.57 10.014 2579 2830 O 3139 3,367 257.33
1180 0.099 59.16 9.956 25190 1640 0.052 31.30 3358 25133
1190 0
009 59.16 9.6W 257.96 2860 0.062 31.01 926 257.32
1200 .
0.0"6 58.90 9.610 237.95 2880 0.051 9091 3.284 287.32
1210 0.03 58.80 9178 257.93 7844 9.981 30,92 1284 26722 ,
1220 0.098 5860 1).719 257.94 2890 0067 30.43 8 257.31
1230 0.097 SSA1 9.987 267.94 2990 3024 3,23 267.31
1240 0.07 58.22 9.802 257.90 27M OA60 3.173 25731
1250 0.097 6803 9,544 267.90 2710 0.090 29 3.}43 257.30
1200 0.098 67083 9,467 257.92 2720 0.040 29.66 3,113 267-30
1270 0.00 S784 91420 - 2730 x040 22.48 SA04 25730
129 0 0
09 8 57.45 9,371 75791 274 0 0.010 282 7 3.065 257.30
120 .
00
0 0 5 $72 5 9.314 2572D 275 0 0.01 6 Z9 3.92 8 2372 9
130 .
00
0 0 0
5 57 8 9257 257.90 T7W 0.916 26.8 6 200 7 257.29
.
0
00 .
5 588 2001 257.0
7 9 2M "M ? 7.2 9
.
0.09 4 50.6 .
6 9,144757.89 278 0 0.04 7 20.5 0 2.94 0 257.2 8
0.00 4 55.4 8 0.087 257.88 279 0 0.04 7 763 0 2.91 1 2872 8
0.09 4L - 582 9 9.031 267.88 280 1) 0.04 7 20.1 1 266 3 257.2 8
0.00 3 58.1 0 6.975 257.97 281 0 0.04 7 27.0 2F 2AM I 2372 8
0.00 3 MA 8.919 257.68 202 0 a 27.7 2 2.92 0 257.2 7
0
09 3 55.7 1 6.663 257.96 253 0 0.00 0 275 1 257.2 7
1 .
0.09 0 55.5 2 8,808 257.68 261 0 0.01 8 77.3 4 2.77 3 257.2 7
0.00 2 553 3 8 752 257.05 266 0 0.91 6 77.1 4 2 74 8 257.7 7
0.09 2 58.1 3 6897 257.54 0.04 8 20.9 5 2.71 9 257.2 8
OA0 2 54.9 4 &642 257.64 287 0 0.04 8 20.7 9 2.69 2 2572 6
0.09 1 54.7 6 0.567 257.83 280 0 0.04 4 66 b 257.2 42 7i
0.09 1 54.6 5 8,533 257.83 289 0 0.0 44 26.3 7 2.63 0 287.2 6
144 .L---
O
W i 543 8 8.479 257.82 290 0 O.O N 26.7 0 61 3 257.2 5
148 .
0 0.00 0 54.1 7 8.424 26782 201 0 0.04 7 25.1 6 2,W 7 2672 5
YYC I LA NU Ur- i CRY I Iu1Y DAWN urCKA I IUN AMU MAIN I r-MmUt: AUM MM 1
FOR 7.48 AC. PARCEL IN DURHAM CO. OWNED BY O.W. ALPHIN, JR.
DESCRIBED IN D.B. 3666, P. 481 IN THE DURHAM CO. REGISTER OF DEEDS
The wetland detention basin system is defined as the wetland detention basin and pretreatment including the
forebay.
Maintenance activities shall be performed as follows:
1. After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wetland detention basin system for sediment accumulation, erosion, trash accumulation,
vegetated cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs
within 2 to 5 days as designed.
2. Repair eroded areas immediately, re-seed as necessary to maintain good vegetative cover, mow
vegetative cover to maintain a maximum height of six inches, and remove trash as needed. Refer to the
approved wetland planting plan for areas to be mowed. These areas are limited to the fescue grass
areas above elevation 260.0.
3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to
maintain proper functioning.
4. Remove accumulated sediment from the wetland detention basin system semi-annually or when depth is
reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed
of in an appropriate manner and shall be handled in a manner that will not adversely impact water quality
A- e. don't stockpile near the wetland detention basin or any stream, etc.). '-5 F,
i , t ? p?,+,* L. At-j j i,.
The measuring device used to determine the sediment elevation shall be such that it will give an
accurate depth reading and not readily penetrate into accumulated sediments.
If the elevation of the marsh areas exceed the permanent pool elevation, the sediment should be
removed to design levels. This shall be perfoffned by removing the upper 6 inches of soil and stockpiling
it. Then the marsh area shall be excavated six inches below design elevations. Afterwards the stockpiled
soil should be spread over the marsh surface. The soil should not be stockpiled for more than two
weeks. Replant wetland plants as needed to maintain plant density per approved plans.
When the permanent pool depth reads 2.2,5 feet in the forebay and micro-pool, the sediment shall
be removed.
BASIN DIAGRAM
Permanent Pool Elevation zS 7. d
Sediment %E%vion l Ene'- 7596
Sediment Removal Elevatin AW.5` Bttom S% - - - ------- 475%
,??-----
FOREBAY
MAIN POND
Pale 1 of 2
5. Wetland planting densities in the marsh areas should be maintained by replanting bare areas as needed.
Wetland plants should be encouraged to grow in the marsh areas.
6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment
through the emergency drain shall be minimized to the maximum extent practical.
7. All components of the wetland detention basin system shall be maintained in good working order.
I acknowledge and agree by my signature below that I am responsible for the performance of the seven
maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any
changes to the system or responsible party.
Print name: . Vet . 1 1n- ri -5c-
Title: nt..r r=.C
Address:'P,v 6-0X Phone: 4 -7 2-1
Signature:
Date: W
Note: The legally responsible party should not be a homeowners association unless more than 50% of the
lots have been sold and a resident of the subdivision has been named the president.
-, /
-? (U 4 k S a Notary Public for the State of
County of do hereby certify that . G?• ?
personally appeared before me this 6 day of?h , Ak,gs?, and acknowledge the
due execution of the forgoing wet [wetland] detention basin maintenance requirements. Witness my hand
and official seal,
• SGT AAy
y?0% jOUBL1G

SEAL
My commission expires ?? (Q
Page 2 of 2
- - 5: , I
7

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27

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Sul vey f(,!
(:).k/V. Alphinjr.
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Hot P,flc: I--? A,?,--?

2004065722
RFGISTRA?' RE - ??-STER OF
WiIii. , - ? " ' r?ton
DURHAM COUN! Y ?40
2004 DE,,^, 22 0 1108 ? 41 PM
4650 PS: 896!-H8
i
INPIMEJ ? K'0111,657K
'2' 0 0 4
COMPLIANCE WITH WETLAND & BUFFER REGULATIONS
In accordancewith Title 15 A NCAC 211.0500, the l'ollowing DJEED NOTWICATION,
shal-l be recorded in the Durham County Registry prior to the convevance of lots. Said
Deed Notification shall apply to the 7.36 ± ac. parcel known by the ?ollowing parcel
identification PIN 0738-03-01-8050 in Durham County, North Carolina as shown on
plans titled "Survey for O.W. Alphin, Jr." prepared by S.D. Puckett &- Associates, hic.
dated: December 1. 2001
"A portion of this lot has been determined to meet the requirernents for
desionation as a stream wetland as described by the attached surveN. plan. Any
subseQ , Liellt fill or alteration of t1his area shall conform to the requirements of the statt,
ruies adopted by the State of North Carolina in force at the time of the Droposeci
-fl-teration. The intent of this provision is to prevent additional weltind otrPRm (%r kiifi'-
tiffiric, or draming, so the property wvner should not assume that a Itture application for
filling or drainhig, would be approved. The property owner shall report the narne of the
subdivision in any application pertaining to said rules. This covena-nt is intended to
ensure continued compliance "ith all rules adopted by the State of North Carolina and
therefore the State of -.-North Caro i1na may enforce benefits. This covenant is to rLin with
the land and shall be binding on all Parties and aH persons claiming under thcni".
ignature
Ovmer's name: O.W. Alphin, Jr.
/%ddress: 1910 Sedwick Rd., Suite 200 A
City, State, Zip Code: Durham, N.C., 27713
Phone Number: (919) 544-646-1
STATE OF North Carolina.
DUMAM COtNTY
a Notary Public of the State of North
kl-'ounty, hereby certi4, that
Carolina,.
appeared before rric this day and executed by above certification.
Witi- -s m-v hand and notorial seal, this day of i1jr
A? L->
NotarN- Public
My commission expires:
Mo
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Michael F. Easley, Governor
January 31, 2005
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Mr. Oliver Alphin, Jr.
1910 Sedwick Road, Suite 200A
Durham, NC 27713
Subject Property: Alphin Property at NC 55 near NC 54
REQUEST FOR MORE INFORMATION-Stormwater Management Plan
0?t) ? -?
William G. Ross, Jr., Secretary
Alan W. Klimek, P.E., Director
DWQ Project # 04-0885
Durham County
On January 11, 2005, the Division of Water Quality (DWQ) received the Storm Water Management Plan
prepared by your engineer, Mr. Kenneth Wrenn, P.E., of Wrenn Engineering Company, to comply with
the conditions of3solated Wetland Permit No. 13 issued on July 20, 2004.
The Plan was unacceptable for the following reasons:
The extended detention wetland must be designed in accordance with the 1999 Stonnwater BW Manual.
This is located on the DWQ website: ft://h2o.enr.state.nc.us/ncwetlands/mitresto.htnd. The
deficiencies in the submitted plan included the following:
Ratios for each portion of the wetland must be in closer proximity to those in the Manual.
Extended detention wetland depths must be in accordance with the BW Manual. J.
The amount of impervious surface area exceeds 70%; DWQ has calculated your on-site
impervious surface area to be 83.95%. Please explain this difference.
Please provide information regarding inlet and outlet velocities. I/
Please respond within three (3) weeks of the date of this letter by sending three (3) copies this information
in writing. This letter only addresses the Stormwater Management Plan review and does not authorize
any impacts to wetlands or streams until the Plans are approved. Please email Ms. Cynthia Van Der
Wiele, Ph.D. at [e-mail] if you have any questions regarding these issues.
Sincerely,
0?t?4 44
Cyndi B. Karoly
DWQ, Wetlands / 401 Unit
CBK/cvdw
cc: DWQ Raleigh Regional Office
USACE Raleigh Regulatory Field Office
File Copy
Central Files
Kenneth Wrenn, Wrenn Engineering Co., 1910 Sedwick Rd., Suite 200-C, Durham, NC 27713
401 Wetlands Certification Unit
1650 Mal Service Center, Raleigh, North Carolina 27699-1650 One
2321 Crabtree Bouievard, Sulte 260, Raleigh, North Carolina 27604 N:dfthCarolina
Phma- 010.7"-1701t I CAYWO-71I.A009 I - #?*- -
0.
Wrenn
Engineering
Company 413 8 fl,
Cyndi B. Karoly
N.C. Division of Water Quality mmwo_
Wetlands/401 Unit
2321 Crabtree Blvd.
Raleigh, N.C.
27604-2260
4-27-05
Re: Alphin Property, Durham, N.C., WQC Project # 04-0885 (Cape Fear Basin.)
Written Review Comments on Final Written Storm Water Management Plan (1/ 10/05)
Cyndi,
I received the written comments from you regarding the first review. It took some time to
coordinate the revisions to the plans due to review comments #1 and #2. Following is an
itemized response to each of your review comments.
I . "Ratios for each portion of the wetland must be in closer proximity to those in the
manual."
Response: The ratios for each portion of the pond have been revised to conform to
the 1999 BMP State Manual depth regime ratios provided on page 18 of the manual.
The following is a breakdown of the 1999 BMP Manual depth regime ratio goals
and the actual design depth regime ratios:
Goals-
70% of surface area of the permanent pool between depth of 0" - 18" with 35%
between depth of 0" - 9" and 35% between depth of 9" and 18".
15% of surface area of the permanent pool between depth of 18"-36" (a micropool)
located at the outlet device.
15% of surface area devoted to a forebay as outlined on the EDW worksheet.
Design-
35.92% between 01' - 9" depths
35.94% between 9" - 1811 depths
13.77% between 18" - 3611 depths (micropool only)
14.37% between 0" - 36" depths (forebay only)
2. "Extended detention wetland depths must be in accordance with the BMP Manual."
Response: The depths have been revised to conform to the 1999 BMP State Manual.
The response to comment #1 above addresses the depth regimes. See the revised
grading plan and stage-storage relationship worksheet.
3. "The amount of impervious surface area exceeds 70%; DWQ has calculated your on-site
impervious area to be 83.95%. Please explain the difference."
Response: The supporting calculations show that the total project and parcel area is
7.36 acres. All 5.152 acres of site derived imperviousness drains to the pond.
Therefore, 5.152 acres / 7.36 acres = 0.70 or?70% imperviousness. The 83.95%
1910 Sedwick Rd., Suite 200-C
Durham, N.C. 27713
Voice 919.806.5082
FAX [phone]
[e-mail]
calculated by DWQ is the 5.152 acres of onsite derived impervious area divided by
the contributing 6.137 acres of drainage area routed to the wetland. The 84.41%
calculated for determining the SA/DA ratio includes 0.028 ac. of offsite derived
impervious area in addition to the 5.152 ac. of onsite derived impervious area or
5.180 ac. / 6.137 ac. = 84.41%.
"Please provide information regarding inlet and outlet velocities."
Response: The 10yr peak flow at Out-2 = 32.6 cfs. The 10yr outlet velocity of 30"
rep pond barrel (OUT2) = 6.64 ft/s.
Note that the upper reach of the receiving channel is lined with rip-rap to dissipate
the velocity. The remainder of the receiving channel is lined with a poly netting
geosynthetic and fescue grass. The netting will aid in establishing a strong root
connection between the fescue grass and the sloped channel sides. The 10yr channel
velocity is 4.46 ft/s.
The 10yr peak flow into the pond from YCB-1 is 32.3 cfs. The 10yr inlet velocity of
the 36" rep into the pond from YCB-1 is 4.57 II/s.
Please contact me at my office if there is anything I can assist you with.
Sinerely,
Kennett. B. Wrenn, P.E
President
Cc. Wendell Alphin, Jr.
Proiect Narrative:
This project is comprised of a 7.36 acre property that is proposed to be developed in two
phases.
Phase One involves piping 539 Lf. of an un-named isolated intermittent stream of the Cape
Fear basin, constructing an extended detention wetland BMP designed for future buildout of 70%
impervious, and converting the existing house to a small retail operation.
Phase Two involves developing the entire property as commercial uses and reaching the
maximum allowed 70% imperviousness. All stormwater runoff from impervious areas associated
with the proposed development will be routed to the extended detention wetland.
Site Plan: (See attached)
There are four drawings in the set as follows:
IIWQ1" drawing illustrates the phase one and phase two development of the project site. The
extended detention wetland is being constructed with phase one to handle full buildout of the site.
The full buildout will be 70% impervious as indicated on the original PCN application on file at
your office. Note that the actual building and parking arrangement may vary some, but the
impervious area will be kept to no more than 70%.
"WQ2" drawing illustrates the details of the wetland facility.
IIC-3A" drawing illustrates the erosion control plan for phase one.
IIC-3B" drawing illustrates the erosion control plan details for phase one.
Extended Detention Wetland Worksheet: (See attached)
An "Extended Detention Wetland Worksheet" has been provided. See the attached.
A Site Specific Operations and Maintenance Agreement: (See attached)
A signed and notorized O&M document is provided. The original document was submitted
with the original submittal. See attached copies.
Supporting Calculations:
Extended Detention Wetland (EDW) for 85% TSS reduction. Note that the contributing drainage
areas to the EDW are separated into onsite and offsite areas that either drain directly to the
forebay or bypass the forebay and drain directly into the pond.
Phase 1 Data:
Onsite DA to EDW bypassing forebay = 1.562 ac.
Onsite DA to EDW via forebay = 4.082 ac.
Offsite DA to EDW bypassing forebay = 0.0 13 ac.
Mite DA to EDW via forebay = 0.2 10 ac.
Total DA to EDW = 5.867 ac.
% imperviousness of 7.36 ac. site = 3.83%
Phase 2 Data:
Onsite DA to EDW bypassing forebay = 0.480 ac.
Onsite DA to EDW via forebay = 5.629 ac.
Offsite DA to EDW bypassing forebay = 0.000 ac.
Offsite DA to EDW via forebay = 0.028 ac.
Total DA to EDW = 6.137 ac.
Impervious area to EDW = 5.180 ac (inc. 0.028 ac. offsite)
% imperviousness of 7.36 ac. project site = 70.0%
% imperviousness to EDW = 84.41%, SA/DA = 3.5272.
EDW surface area required = 0.2165 ac. (9,431 s.f)
EDW surface area provided = 0.2204 ac. (9,599 s.f)
Following are Responses to "Required Items Checklist" on the BMP Worksheet:
Control of 111 storm- Depth of I" rainfall = 0.05 + (0.009 x 84.41 %) = 0.810 in r/o.
Required Min. Volume of I" rainfall = 0.810 in x 6.137 ac. x 43,560 s.f. / 12" = 18,045 c.f.
Provided Water Quality Pool (WQP) Volume = 18,166 c.f.
Basin Side Slopes- 3:1
Planting Plan for Marsh Areas with Plant Species and Planting Densities Provided- Yes.
See Planting Plan.
Vegetation above the Permanent Pool Specified- Yes. See Planting Plan.
Emergency Drain Provided- Yes. See Detail Plan for detail of 8" bottom drain.
Temporary Pool Draw Down between 2 to 5 days- The temporary WQP draw down time
approximately 2.5 days. See attached draw down worksheet.
Sediment Storage is Provided in the Permanent Pool- The Forebay and Micro-Pool are both
specified to be over excavated to elevation 253.00' to account for sediment storage. The
sediment storage volume is 1,064 c.f
Sediment Disposal Area is Provided- An area has been specified on the plan for sediment
disposal. The area drains to the pond.
Access Provided for Maintenance- The basin facility is provided with adequate access to all
areas of the facility. See plans.
A Site Speciflc Operation and Maintenance (O&M) Agreement Plan Provided- A signed
and notorized, O&M agreement is provided. See attached copies.
All Drainage Areas that Contribute to the EDW are Delineated on the Site Plan- See plan.
Plan Details for the Wetland are Provided- See plan and details.
Plan Details for the Inlet and Outlet are Provided- See plan and details.
Following is an itemized list of the Conditions of Permit and how we meet the objectives to
satisfy the final written storm water management plan:
1. Impacts Approved.
The proposed 539 linear feet of impact to the stream has not changed. The pipe size has been
revised to two 54" rcp culverts to satisfy the local stormwater 10-yr peak flow requirements.
2. Appropriate Sedimentation and Erosion Control Practices Must be Utilized.
A copy of the erosion control plan for phase one has been included. The plan meets or
exceeds the requirements of the state. The extended detention wetland (EDW) will serve as a
master sediment basin during phase one construction and will be cleaned out at the end of
phase one construction and vegetated and made operational. No permanent buildings will be
occupied before the EDW is made fully operational and the stormwater management plan is
implemented as approved by NCDWQ wetland unit. Phase two erosion control will filter the
sediment borne runoff before it enters the EDW. This will be done by excavating a pit
around the EDW that will serve as a Type "A" sediment basin. This will ensure that
significant amounts of suspended sediment will not contaminate the EDW during phase two
construction.
3. All Temporary Sediment and Erosion Control Measures Placed in Wetlands or Waters
shall be Removed and Natural Grade Restored after the Division of Land Resources has
Released the Project.
No temporary measures are proposed to be placed in wetlands or waters. All sediment and
erosion control measures will be removed after the Durham County Sedimentation and
Erosion Control Department has inspected and approved the site at final inspection.
4. Measures will be Taken to Prevent Live or Fresh Concrete from Coming into Contact
with Waters of the State until the Concrete has Hardened.
The plans specify that the culvert laying operation must begin during dry weather. During
dry weather there is normally no visible flow occurring in the stream being piped. The
culvert and headwall are both planned to be pre-cast. Depending on the availability of the
pre-cast headwalls at the time of construction, it may become necessary to cast the headwalls
in place. No fresh concrete will be allowed to come in contact with any waters.
5. Final Written Stormwater Mangement Plan Required before Permitted Impacts Occur.
See attached.
6. Upon Completion of this Project, the Applicant shall Complete and Return the "Permit
of Completion Form".
This requirement will be done.
7. Deed Notification shall be Placed on all Retained Jurisdictional Wetlands, Waters, and
Protective Buffers in order to Assure Compliance for Future Wetland, Water, and
Buffer Impacts.
A deed notification has been placed on the property and is on record at the Durham County
Register of Deeds. See attached recorded deed notification.
DWQ Project No. C24 - 0 F3 SF-`?
DMSION OF WATER QUALITY - 401 EXTENDED DETENTION (NW POCKET-) WETLAND WORKSHEET
1. PROJECT INFORMATION (please
Proiect Name: ALm oi o t-? %,
Contact Person: iL Iff'3 *3 %16 ?? PhoneNurabjr:
For projects with multiple basins, specify which basin this worksheet applies to: - F I
Permanent Pool Elevation
Temporary Pool Elevation
Permanent Pool Surface Area
Drainage Area
Impervious Area
Forebay Surface Area
Marsh 0"-9" Surface Area
Marsh 9"-18' Surface Area
Micro Pool Surface Area
Temporary Pool Volume
SAIDA used
Diameter of Orifice
REQUIRED ITEMS CHECKLIST
-Zc,> 7. 0 ft. (elevation of the orifice invert out)
ft. (elevation of the outlet structure invert in)
sq. ft. (water surface area at permanent pool elevation)
ac. (on-site and off-site drainage to the basin)
S'180 ac.
13-79 sq. ft.
sq. ft.
(2 _sq. ft.
sq. ft.
cu. ft.
Z 7
R.0 in.
(on-site and off-site drainage to the basin)
(at permanent pool elevation approximately 15%)*
(at permanent pool elevation approximately 350/or
(at permanent pool elevation approximately 35%)*
(at permanent pool elevation approximately 15%)*
(volume detained on top of the permanent pool)
(surface area to drainage area ratior
(draw down orifice diameter)
Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If.9
119q1111V,77,9n117.9S 1701MOll ln,9t, 8&29cli aw axolamq§on otwhy, At a minimum, a complete stormwater management plan submittal includes
a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed
drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for
additional information and will substantially delay final review and approval of the project
Applicants Initials
?'3 "? The temporary pool controls runoff from the 1 inch rain.
C60 he basin side slopes are no steeper than 3:1.
d -a 0:1 A planting plan for the marsh areas with plant species and densities is provided.
'it 9 vwl Vegetation above the permanent pool elevation is specified.
&%&-? An emergency drain is provided to drain the basin.
y- ia I—; The temporary pool draws down in 2 to 5 days,
- Sediment storage is provided in the permanent pool.
-A sediment disposal area is provided.
- Access is provided for maintenance.
-A site specific, signed and notarized operation and maintenance agreement is provided.
-The drainage area (including any offsite area) is delineated on a site plan.
-Access is provided for maintenance.
-Plan details for the wetland are provided.
-Plan details for the inlet and outlet are provided.
site specific operation and maintenance agreement, signed and notarized by the responsible party is provided (see
http://h2o.ehnr.state.nc.us/ncvmflandsloandm.doc).
the following information):
;?j I 116 -jAA L
* Pocket Wetlands have different design parameters and are only assumed to remove 35% TSS - See pp. 19 and 20 of the NC DENR
Stormwater BMP Manual, April 1999. 10% open water, 50% high marsh, 40% low marsh.
stage-storage relationship for Alphin Hwy #55 project extended detention wetland
Note that the design invert elevation of t pond is 254... . The pond oil be overexcavated to 253.00 to account for sedimentation.
ELEV AREA AREA AREA INCR. VOL. INCR. VOL. ACCUM. VOL ACCUM. VOL ACCUM, VOL WQP VOL
. FOREBAY POND TOTAL FOREBAY POND FOREBAY POND TOTAL TOTAL
E
s
l
ft a S.f. S.f. S.f. CJ_ C.f- CI C.f. C.f. C.f.
.
.
.
00
253
229
644 3
87
0
0
0 0
0
.
00
254 362 892 1254 0 0 0 0 0
_
.
00
255 522 1165 1 687A 442 1029 442 1029 1 ?7
1
.
50
255 612 1322 1934 284 622 726 1650 2376
.
00
256 709 3613 4322 330 1234 1056 2884 3940
.
256
25 1171 4772 5943 235 1048 1291 3932 5223
.
50
256 1239 5469 6708 30n 1280 1592 5212
.
75
256 1308 5999 7307 318 1434 1910 6646 8556
.
00
257 1379 8220 9699 336 1777 2246 8423 10669
.
50
257 10313 15647 4978
.
00
258 - 11050 20988 10319
.
50
258 11778 26695
.
258.68 - - 12001 28835 18166
00
259 12478 32752
.
260.00 14004 459931 -

Depth R imes by 1 99 NCDWQ BMP Manual Requirements
Depth POND % TOTAL Notes
Goal Regime Area Pond Area
35% 0" - 9" 3448 35.92%
35% 9" - 18" 3450 35.94%
15% 18" - 36" 13 2 13.77% lmicropool area only
15% 0"-36" 1379 14.37% lforebay area only
totil- 9599 1 100.00% 1
DRAWDOWN TIME FOR 7'ORIFtCE (INVERT AT 267-00)
FOR ALPHIN HWY 66 RETAIL EXTENDED DETENTION WETLAND
STORM POOL VOLUME= 18,150 CF.
STARTING STORM POOL ELEVATION= 258.69
NORMAL POOL ELEVATION- 257.09
POND
POND
POND
TIME INTERVAL OF 10 MIN. ELEV? AREA VOLUME
258.68 12,044 16.150
258,00 11.036 10,31F
257.00 9?599 0
UME WATER TIME RArE O UTFLOW VOLUME WATER
1 0 1 rrFI OW VOLUME W ATER
ELEV. TIME F
MIN LOW E O
Cl
a UTFLOW VOL CFS
2579 JAA
2.561
257.25
0 18106 1KA IM 1460 0 D 043 25.ou 257.25
33 0- ` 7
4
io 0.1 99 D 25.40 10
2 5 25
,2
20 0,133 .0 0 042
0
30 0.132 ?089 AIM 25779 2w , 1 48ffin
132 17
79 17
847 iRR AS c
40 0. , , " ol 103
11 257 711
50 0.132 78.99 17,768 258.65 1510 22 , 25778 U41
U
r 0
131 -1882 690
17 25884 1520 .. 1 82 8.051 .
60,
70 .
0.131 7865 ,
17.011 258.83 1530 0088 5202 7,998 25778
57
77
30DO 0041
0040 ?4,A
24-24
2 3362 257.23
0
131 78
48 532
17 258.63 7540 0.087 52.43 7.940 2
.
80
90 .
0.131 .
7830 ,

: _
25a.62
' 15W 0.087
0
087 52,24

5205 7 A93

841
7 257.71

25770 3010

3020 0 D40

0040 _-74.,U5
23,85
2314
loo 0.1 78.13 ?
17 256.01 1560 , , 2571t 3030 0039 ??'d
77 17 298T 258 61 1570 0088 51 7,789
lic U.1 0 3D40 0039
120 77 220 5860 1580 ;
! 3050 0039 23
2 243 25722
i3n 0.129 - 1590
- 0?088 51.47 7
686 257.74
74
57 sem G 030 .
23.05 2.220 7,
7:?
Td;? 0.085 5 t 27 7.035 2
, i
- ? omi 5108 5a4
7 257.74 om 22.89 2 21
25
??7 16 9068 610 ? 7
3 1 7.21
77 C 1620 50?? 7533 25
7
70
50 7482 25773 22. 7.21
I on3o . 7
72 3 25721
7 1640 50,50 7,432 25
.
165wo 7.38 25772 2212 251.20
76 084
O 6612 331
7 257.71 2.7 in
TO, less ? , 3130 0036 73
21
76,: 1670 0093 4992 7.282 25711
70
7 3140 D
038 9
21654 27042 257.20
7 70 DIS 452
16 2
-;9
53 1690 Drags 49673 7232 25
. .
220 0.12 6 -
. ')63 64
40 182
7 267.70 3150 0.0316 21.34 2,021 257.20
250 0.126 75.89 16*37e 258,53 1690 Or , , 3100 0035 21
15 2,ODO 25719
1215 7571 300
16 258 52 1700 0082 4935 7.133 257.69 ,
240 0. 7 0082 49
15 7
084 257.89 3170 0.035 20,9e 1,979 257.19
250 0,120 75.54 16,225 25851 1710 . , 3180 03,5
0 76
20 i ?958 25719
260 0.126 75.37 160149 25851 1720 0.082 4&98 70035 257 *68 3190 7
0m
0 +
57
20 1938 25710
270 0.12 76.20 16.074 25850
- 1130 06081 4877
877
4 6,986
ooss 257.88:
07
7
3200 .
01134
034
0 .
20,38
1,917
257.19

125
0
02
75
15
90
25849
1740
0.081
48.57
6,937
7
0
:
'
25
.
.

280
.
.
.
-3;
o
oal
48
38
6
889
9
6
257.67
3210 .4
0.034
20,18
2"
lm897
26718

0.125
74.85
15,924
8.49
--
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.
9
,
-
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60
3220 .033
0033
19999
1877
257 18

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74
68
15
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760
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4
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0.841
841
0
V
. N

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74.50

.
15,775

25B 47

1770
-

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47,141

6,793
6793

257.66
5765

3230
3240 a33

09D33
.33
0633

19.80
19,00

1.857
1.038

257 18
257618
24 7 4
33 701
!5 25a 47 780 0080 47r8C 6.745
6745 2

220
330
0.1
0.124
99
?
74.16
?
15,627
25846
1790
- 'i
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0
079
O79
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47961
4 7 6
1
42
47
A 097
6
e 9 7
6
650
257A5

1 257.64
3250

3200

00
0.032
0032
1941

1922
1.818

1 799
257 18

257 17
340 0.123 73.99 15,553 (
- r .
- 9 3270 032
0 i'll
1
I
L51
+!
360 0123 7381 15479 2584 1 10
-161-0 O?079 !
?2 6,603 257.04 :12an 9
031
0 ; N --
,
f -,
1
I
123 364 405
15 25844 0?078 17. 1 6,51t1o ; ZD-1 .
360
170 0,
0.122 P3947 9
15,332 256.44 1 1830 06078 46984 6,509 25763 14 m
Anifflo l&64
1844
122 7330 15
268 2-S8,43 1840 06078 46.64 6,462 257.63
381 3 0. , 0
077 4645 416
6 257+6 Asia 0030 1825 1,706 1 257. 171
I own 73 12 15,185 2 2 1850 . , 3320 18
05 1 688 r 257 11f,
72
95 112
15 258.42 1960 0 * 077 4026 0,370 257.62. , 1 1
1
400 0.122 .
7 ,
15040 1
2 187 0 OrOn 406UI 6,324 257-61 u.u-.iu i7m 670 257.16
41 0 0.121 726 8 . 0
076 45
87 3340 1:22
1 17.67 1.852 1 257.16
42 0 0.12 726 0 14,967 25840 188 .
0 ? 3350 ; 1747 1
635 267.16
1 430 1 0121 724 3 14
095 1 25840 89w o ,
.
7 0
07 49 187
6 257.00 3360 0029 17.28 1,618 257.16
44 01 oi2 o 72.2 6 147&
22 25s.3 9 igo .
o 1 70
3 G28
O 17
09 1,
7
45 0 0
12 0 720 9 14750 258+3 8 191 0 0.07 45.2 9 0,141 257.60 3 r .
T
4 ?
1
6 0
0 45
1 090
0 6 257M 3380 002 16.89 -1. .7 15
012 0 710 1 14,678 255.3 8 192 .
0 . . 0 0028 1 n 1
7 25
47 0 091L O 717 4 14,607 2583 7 193
4 0 co 5
0
075 .10
44
7 4 6051
007
1 6 257?59
251.68 339
3400 0028 ,?;
48 0 Or' 1 9 71,5 7 14,535 258.3 7 19 0 9 . . 10 027
0
49 0 0.11 9 719441 C 149484 25589 195 0 11 a14 445 2 51952 257.58 34 6 6
1 I
SiI 15
3 257
011 9 712 14
392 25863 5 196 0 443 3 591 8 3421 3 06027 1
. . .
500
510 Oil s 71 CI S ,
14321 25$3 5 10,7 0
0 0074 44.1
419 4
4 5 3 25757
U 257.56 3430
3440 0027
06020 15602
IS 73 150
1 A88 2 257.15
257.14
520 011 8 a 198 0126
0 15
5 471
4 1 1 257.14
51?0 11 7 1 1418 0 2 lo w 43.7 5 -- . . .
4SM 74
5 ??
2 25T 3413 0 002 6 1 A5 5 25 .14
1,40 0 1 its 70S3 1410 9 25 . 2000 . : 347 0 - Is 1 & 1.44 0 267.14
0
117 7 AR 1403 9 2010 0.07 2 .3 0 5.641 9 257.66
wo
Saw - 7019 13
N 9 2 2020 0.07 2 431 7 5.65 6 257.55 348 0 0.02 5 14.0 1 -
6 Q
G7 9
2 42 8 0
5 3 257.54 34 ? 92 5 4999 6 1 1
1 ' 257.14
57f) 0.117 7001 130W 2 .
07
0 .
1 42 9
5 257.54 350 0 .112 4 14.5 7 1!
37 . 257.14
5?amo - 0 , 02 3
4 14 38
7 1 2 257.13
sm alle 6967 13.rb v z 2mmso 0 1 4299 5 52 111 257954 351 0
0 002 ?
4 14
1 .
3e
8 1 7 257.13
8w 1 16
0 Q 13
69 0 258.29 2060 007 1 42, 5 352 . .
610 .
0.116 w32 ,
13.62 0 258.29 2070
o 0,07
07
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0
0 42 l
l 5,44
40
5 3
1 257.52 353
354 0 OrO2
0 0 02 3 1399
? 13.7 9 1,35
9 1,34 3 257.13
0 257,13
M 0115 69,15 13,55 1 258r28 B . r , 02
0 3 13
0 0 132 61 257.13,
630 0+115 6&Q 13.48 2 258.27 0.07
013
0 0 41.
9 41IR 82
3 5,35
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7 257.52 .
0. 2 ,
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640 0.115 6P 61 13.41 3 25827 2100 ? , 0
2
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24 5,27
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8 0 002 ++
2 3 ,
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P
14
r aw l 0.11 2
! "' 27 6 258. 2 , , 59 0 0 1 1 2 .12
2
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L ! j 13,20 81 258 25 2130 0-06 8 .1 nA 619 4 2 3
i:
1140
40
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5*153
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r 2?0
0.02,
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5 .
5
680 0114

0114 $8.11 13?140
2150
0
008 r
40
60
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112
257.50
3610

0
0021
12.43
1,249 1
257 2
5
6901 0.113 87.94 13,072 25823 2160 0
O
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47
40 ,
5
072 257049 3620 0.020 1224 1,236 257.12
7001

0', 3
0.113 67.77 131004 23
258 2170 F
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5,CM31 257.49 3630 0.020 12.05 1,224 257A2
2t?

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4.991
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257.12
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7 0.112
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25820 2210 ,
0
0M 39.50 4,8T2 257471 3570 0.019 1127 1,1781 257.11
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50 0112
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0
005 39.12
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70 0.111 6656 .
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---
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0
2 25818 2250 0
066 38-73 4,716 25746 3710 Q.017j 10049 IF135 257pli
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7 ,
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810 0.110 65 B7 0
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U 35.15 4*601 25745 3740 0.017 9.91 1,1D5 257.11
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12
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258
16
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3718
3'
4,563 _
74?4
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I ,

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15
lr

2310

0
063 3117

3757

4,488

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w
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6
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257A3

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9.13

80
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0
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83
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11
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25814

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0
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3719

4,413

257143

3790

0.015 4

8.04
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1
1 257.10

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0.108
,
66
,
11
814
8
3
2340
0
01062
w 9D
4,376
257.42
3800
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1 257.10
aso 0.108 64
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11
749 L
25812
2350 36rso 4,339
257.42
3810 8.55 1,041 257,10
890
- 0107 1 ,
11
656 25812 2 3MM 3661 4?3W 267.42 3820 0.014 8,35 1
900
-
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vvc I Ljqnu ur. I =rill jun uPdoln Ul-CM11UN AMIJ MAINIMMMA: AUMMMUN I
FOR 7.48 AC. PARCEL IN DURHAM CO. OWNED BY O.W. ALPHIN, JIL
DESCRIBED IN D.B. 3686, P. 481 IN THE DURHAM CO. REGIVrER OF DEEDS
The wetiand detention basin system is defined as the wetland detention basin and pretreatment including the
forebay.
Maintenance activities shall be performed as follows:
1. After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wetland detention basin system for sediment accumulation, erosion, trash accumulation,
vegetated cover, and general condition.
b. Check and dear the orifice of any obstructions such that drawdown of the temporary pool occurs
within 2 to 5 days as designed.
2. Repair eroded areas immediately, re-seed as necessary to maintain good vegetative cover, mow
vegetative cover to maintain a maximum height of six inches, and remove trash as needed. Refer to the
approved wetland planting plan for areas to be mowed. Thew areas are limited to the fescue grass
areas above elevation 260.0'.
3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to
maintain proper functioning.
4. Remove accumulated sediment from the wedand detention basin system semi-annually or when depth is
reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed
of in an appropriate manner and shall be handled In a manner that will not adversely impact water quality
don't stockpile near the wedand detention basin or any stream, etc.).
?, js? m- AQ- 6 k.
The measuring device used to determine the sediment elevation shall be such that it will give an
accurate depth reading and not readily penetrate into accumulated sediments.
If the elevation of the marsh areas exceed the permanent pool elevation, the sediment should be
removed to design levels. This shall be performed by removing the upper 6 inches of soil and stockpiling
It. Then the marsh area shall be excavated six inches below design elevations. Afterwards the stockpiled
soil should be spread over the marsh surface. The soil should not be stockpiled for more than two
weeks. Replant wetland plants as needed to maintain plant density per approved plans.
When the permanent pool depth reads Z-25 - feet in the forebay and micro-pool, the sediment shall
be removed.
BASIN DIAGRAM
Permanent Pool Elevation _317.C'
Sed ment 75%
Otto /
Sediment Removal Elevation
T!? LA447.55?475%
B m %Ev?n no 5
FOREBAY
MAIN POND
Pap I of 2
5. Wetland planting densities in the marsh areas should be maintained by replanting bare areas as needed.
Wetland plants should be encouraged to grow in the marsh areas.
6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment
through the emergency drain shall be minirriized to the maximum extent practical.
7. All components of the wetland detention basin system shall be maintained in good working order.
I acknowledge and agree by my signature below that I am responsible for the performance of the seven
maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any
changes to the system or responsible party.
I ---.#
Print name: PW, CS - - 6
Title: Q%,4 r--.S?C
Address:T,O, 1510?( sa; k V?CO??(A C Li qq 1;;
Phone:.-- qA - G 3g--- ct TZ-1 )
Signature: C?, (-,s , N
Date: 1 (0
Note: The legally responsible party should not be a homeowners association unless more than 50% of the
lots have been sold and 9 resident of the subdivision has been named the president.
6R4 a Notary Public for the State of
County of do hereby certify that go
personally appeared before me this ? day of-??4. _g2g:g1r, and acknowledge the
due execution of the forgoing wet [wetland] detention basin maintenance requirements. Witness my hand
and official seal,
'O'OTAO?,
OREN-
PUBLIC
C 0

SEAL
My commission expires -7
Page 2 of 2
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11111111111111111 ifill! 11P 11111 Jill) JIM )Jill 11111111! 11
2004065722
3;? REG I STR?, Cjt? RE G G I LR OP D??- t D?l
C 0 1,91,on
DURHAM 0=-Y
2004 DEC 22 611:08141 PI'l
SK:4650 %0:696-S88 FEE:$117
!?Vl ?TJ ? KN065"T
2004
COMPLIANCE WITH WETLAND & BUFFER REGULATIONS
In accordance with Title 15 A NCAC 21-1.0500, the tbilowing DEED NOTIFICATION
shall be recorded in the Durharn County Registry prior to the coriveyance of lots. Said
Deed Notification shall apply to the 7.36 ± ac. parcel known by the iollowing parcel
identification PfN 0738-03-01-8050 in Durham County, North Carolina as shown on
plans titled "Survey for O.W. Alpl-tin, Jr." prepared by S.D. Puckett & Associates, 111c.
dated: December 1. 2003.
"A portion of this lot has been determined to meet the requirements for
designation as a stream wetland as described by the attached surve? plan. Any
subsequent fill or alteration of this area shall coritbi-rn to the requirernents ofthe state
Cules adopted by the State of North Carolina in force at the time of the proposed
diteration. The intent of this provision is to prevent additional wetland. stream or hiiff(-.r
iilhng or draining, so the property owner should riot assume that a future appl-ication, f'or
fil-ling or draining would be appro,,ed. Th,-, property owner ,,hall report the narne of tn?
I a' Hit
subdivision in ain application pertaiji?ig to said r1111-s. This coven nt is' ended tc
ensure continued compliance with all rules adopted by the State of North Carolina and
therefore the State of North Carolina may enforce benefits. This covenant is to run with
the land and shall -be bindilg on all Parties and al-l persons claiming under thern"
4?gi?ia?ture
1?) A-'i I ?t
Owner's name: O.W. Alphin, Jr.
Address: 1910 Sedwick Rd., Suite 200 A
City. State, Zip Code: Durham, N.C., 27713
Phone Number: [phone]
STATE OF North Carolina
DURHAM COUNTY
a Notarv Public of the State of North
Carolina, County, hereby certify that
appeared before me this day and executed by above certification.
Wi av of
-my hand and notorial. seat, tl-?s 5A d
17
Notarv Public 41
ires:
My commission exp
I/X
1*0 ? I AF
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Michael F. Easley, Governor
January 31, 2005
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Mr. Oliver Alphin, Jr.
19 10 Sedwick Road, Suite 200A
Durham, NC 27713
Subject Property: Allphin Property at NC 55 near NC 54
REQUEST FOR MORE INFORMATION-Stormwater Management Plan
William G. Ross, Jr., Secretary
Alan W. Klimek, P.E., Director
DWQ Project # 04-0885
Durham County
ED @ I I W [ N
APR 2 8 2005
DENR - WATER QUALITY
WETLANDS AND STORMWATER BRANCH
On January 11, 2005, the Division of Water Quality (DWQ) received the Storm Water Management Plan
prepared by your engineer, Mr. Kenneth Wrenn, P.E., of Wrenn Engineering Company, to comply with
the conditions of Isolated Wetland Permit No. 13 issued on July 20, 2004.
The Plan was unacceptable for the following reasons:
The extended detention wetland must be designed in accordance with the 1999 Stormwater BMP Manual.
This is located on the DWQ website: http://h2o.enr.state.nc.us/ncwetiands/mitresto.htmi. The
deficiencies in the submitted plan included the following:
Ratios for each portion of the wedand must be in closer proximity to those in the Manual.
Extended detention wetland depths must be in accordance with the BUT Manual.
The amount of impervious surface area exceeds 70%; DWQ has calculated your on-site
impervious surface area to be 83.95%. Please explain this difference.
Please provide information regarding inlet and outlet velocities.
Please respond within three (3) weeks of the date of this letter by sending three (3) copies this information
in writing. This letter only addresses the Stormwater Management Plan review and does not authorize
any impacts to wetlands or strearns until the Plans are approved. Please email Ms. Cynthia Van Der
Wiele, Ph.D. at cynthia.vanderwieleOncmail.net if you have any questions regarding these issues.
Sincerely,
Cyndi B. Karoly
DWQ, Wetlands / 401 Unit
CBK/cvdw
cc: DWQ Raleigh Regional Office
USACE Raleigh Regulatory Field Office
File Copy
Central Files
Kenneth Wrenn, Wrenn Engineering Co., 1910 Sedwick Rd., Suite 200-C, Durham, NC 27713
401 Wetlands Certification Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650 One
2321 Crabtree Boulevard, Suite 2W, Raleigh, North Carolina 27604 MofthCarohna
phn"n. 01(L7QQ-i7Q0 I [:AV 0i0-7'4Q-aQ0'3 - #,f^ -
G A,R 1910 Sedwick Rd., Suite 200-C
Wrenn X
Durham, N.C. 27713
Engineering Voice 919.806.5082
FAX [phone]
Company v r . n
Cyndi B. Karoly 21 16 4-27-05
N.C. Division of Water Quality
Wetlands/401 Unit
2321 Crabtree Blvd.
Raleigh, N.C.
27604-2260
Re: Alphin Property, Durham, N.C., WQC Project # 04-0885 (Cape Fear Basin.)
Written Review Comments on Final Written Storm Water Management Plan (I /10/05)
Cyndi,
I received the written comments from you regarding the first review. It took some time to
coordinate the revisions to the plans due to review comments #1 and #2. Following is an
itemized response to each of your review comments.
I . "Ratios for each portion of the wetland must be in closer proximity to those in the
manual.2?
Response: The ratios for each portion of the pond have been revised to conform to
the 1999 BMP State Manual depth regime ratios provided on page 18 of the manual.
The foilowing Is a breakdown of the 19" BMP Manual depth regime ratio goals
and the actual design depth regime ratios:
Goals-
70% of surface area of the permanent pool between depth of 0" - 18" with 35%
between depth of 0" - 9" and 35% between depth of 9" and 18".
15% of surface area of the permanent pool between depth of 18"-36" (a micropool)
located at the outlet device.
15% of surface area devoted to a forebay as outlined on the EDW worksheet.
Design-
35.92% between 0" - 9" depths
35.94% between 9" - 18" depths
13.77% between 18" - 36" depths (micropool only)
14.37% between 0" - 36" depths (forebay only)
2. "Extended detention wetland depths must be in accordance with the BMP Manual."
Response: The depths have been revised to conform to the 1999 BMP State Manual.
The response to comment #1 above addresses the depth regimes. See the revised
grading plan and stage-storage relationship worksheet.
3. "The amount of impervious surface area exceeds 70%; DWQ has calculated your on-site
impervious area to be 83.95%. Please explain the difference."
Response: The supporting calcubtions show that the total project and parcel area is
7.36 acres. All 5.152 acres of site derived imperviousness drains to the pond.
Therefore, 5.152 acres / 7.36 acres = 0.70 or 70% imperviousness. The 83.95%
calculated by DWQ is the 5.152 acres of onsite derived impervious area divided by
the contributing 6.137 acres of drainage area routed to the wetland. The 84.41%
calculated for determining the SA/DA ratio includes 0.028 ac. of offsite derived
impervious area in addition to the 5.152 ac. of onsite derived impervious area or
5.180 ae- / 6.137 ac. = 84.41%.
4. "Please provide information regarding inlet and outlet velocities."
Response: The 10yr peak flow at Out-2 = 32.6 efs. The 10yr outlet velocity of 30"
rep pond barrel (OUT2) = 6.64 ft1s.
Note that the upper reach of the receiving channel is Hued with rip-rap to dissipate
the velocity. The remainder of the receiving channel is lined with a poly netting
geosynthetic and fescue grass. The netting will aid in establishing a strong root
connection between the fescue grass and the sloped channel sides. The 10yr channel
velocity is 4.46 Ws.
The 10yr peak flow Into the pond from YCB-1 is 32.3 cls. The 10yr inlet velocity of
the 36" rep into the pond from YCB-1 Is 4.57 ftts.
Please contact me at my office if there is anything I can assist you with.
Sin?7erely,
enn k.BWrenn, P.E.
President
Cc. Wendell Alphin, Jr.
Project Narrative:
This project is comprised of a 7.36 acre property that is proposed to be developed in two
Phases.
Phase One involves piping 539 Lf of an un-named isolated intermittent stream of the Cape
Fear basin, constructing an extended detention wetland BMP designed for future buildout of 70%
impervious, and converting the existing house to a small retail operation.
Phase Two involves developing the entire property as commercial uses and reaching the
maximum allowed 70% imperviousness. All stormwater runoff from impervious areas associated
with the proposed development will be routed to the extended detention wetland.
Site Plan: (See attached)
There are four drawings in the set as follows:
-WQ1" drawing illustrates the Phase one and phase two development of the project site. The
extended detention wetland is being constructed with phase one to handle full buildout of the site.
The full buildout will be 70% impervious as indicated on the original PCN application on file at
your office. Note that the actual building and parking arrangement may vary some, but the
impervious area will be kept to no more than 70%.
"WQ2" drawing illustrates the details of the wetland facility.
"C-3A" drawing illustrates the erosion control plan for phase one.
"C-3B" drawing illustrates the erosion control plan details for phase one.
Extended Detention Wetland Worksheet: (See attached)
An "Extended Detention Wetland Worksheet" has been provided. See the attached.
A Site Specific Operations and Maintenance Agreement: (See attached)
A signed and notorized O&M document is provided. The original document was submitted
with the original submittal. See attached copies.
Sagporting Ca Ula as:
Extended Detention Wetland (EDW) for 85% TSS reduction. Note that the contributing drainage
areas to the EDW are separated into onsite and offske areas that either drain directly to the
forebay or bypass the forebay and drain directly into the pond.
Phase 1 Date:
Onsite DA to EDW bypassing forebay = 1.562 ac.
Onsite DA to EDW via forebay = 4.082 ac.
Offsite DA to EDW bypassing forebay = 0.0 13 ac.
Oftsite DA to EDW via forebay = 0.210 ac.
Total DA to EDW = 5.867 ac.
% imperviousness of 7.36 ac. site = 3.83%
Phase 2 Data:
Onsite DA to EDW bypassing forebay = 0.480 ac.
Onsite DA to EDW via forebay = 5.629 ac.
Offsite DA to EDW bypassing forebay = 0.000 ac.
Offsite DA to EDW via forebay = 0.028 ac.
Total DA to EDW = 6.137 ac.
Impervious area to EDW = 5.180 ac (inc. 0.028 ac. offsite)
% imperviousness of 7.36 ac. project site = 70.0%
% imperviousness to EDW = 84.41 %, SA/DA = 3.5272.
EDW surface area required = 0.2165 ac. (9,431 s.f.)
EDW surface area provided = 0.2204 ac. (9,599 s.f.)
Following are Responses to "Required Items Checklist" on the BMP Worksheet:
Control of 1" storm- Depth of I" rainfall = 0.05 + (0.009 x 84.41 %) = 0.810 in r/o.
Required Min. Volume of I" rainfall = 0.810 in x 6.137 ac. x 43,560 s.f. / 12" = 18,045 c.f.
Provided Water Quality Pool (WQP) Volume = 18,166 c.f.
Basin Side Slopes- 3:1
Planting Plan for Marsh Areas with Plant Species and Planting Densities Provided- Yes.
See Planting Plan.
Vegetation above the Permanent Pool Specified- Yes. See Planting Plan.
Emergency Drain Provided- Yes. See Detail Plan for detail of 8" bottom drain.
Temporary Pool Draw Down between 2 to 5 days- The temporary WQP draw down time
approximately 2.5 days. See attached draw down worksheet.
Sediment Storage is Provided in the Permanent Pool.- The Forebay and Micro-Pool are both
specified to be over excavated to elevation 253.00' to account for sediment storage. The
sediment storage volume is 1,064 c.f.
Sediment Disposal Area is Provided- An area has been specified on the plan for sediment
disposal. The area drains to the pond.
Access Provided for Maintenance- The basin facility is provided with adequate access to all
areas of the facility. See plans.
A Site Specific Operation and Maintenance (O&M) Agreement Plan Provided- A signed
and notorized O&M agreement is provided. See attached copies.
All Drainage Areas that Contribute to the EDW are Delineated on the Site Plan- See plan.
Plan Details for the Wedand are Provided- See plan and details.
Plan Details for the Inlet and Outlet are Provided- See plan and details.
Following is an itemized list of the Conditions of Permit and how we meet the objectives to
satisfy the final written storm water management plan:
1. Impacts Approved.
The proposed 539 linear feet of impact to the stream has not changed. The pipe size has been
revised to two 54" rcp culverts to satisfy the local stormwater 1 0-yr peak flow requirements.
2. Appropriate Sedimentation and Erosion Control Practices Must be Utilized.
A copy of the erosion control plan for phase one has been included. The plan meets or
exceeds the requirements of the state. The extended detention watland (EDW) will serve as a
master sediment basin during phase one construction and will be cleaned out at the end of
phase one construction and vegetated and made operational. No permanent buildings will be
occupied Wore the EDW is made fully operational and the stormwater management plan is
implemented as approved by NCDWQ wetland unit. Phase two erosion control will filter the
sediment borne runoff before it enters the EDW. This will be done by excavating a pit
around the EDW that will serve as a Type "A7 sediment basin. This will ensure that
signiflcant amounts of suspended sediment will not contaminate the EDW during phase two
construction.
3. All Temporary Sediment and Erosion Control Measures Placed in Wetlands or Waters
shall be Removed and Natural Grade Restored after the Division of Land Resources has
Released the Project.
No temporary measures are proposed to be placed in wetlands or waters. All sediment and
erosion control measures will be removed after the Durham County Sedimentation and
Erosion Control Department has inspected and approved the site at final inspection.
4. Measures will be Taken to Prevent Live or Fresh Concrete from Coming into Contact
with Waters of the State until the Concrete has Hardened.
The plans specify that the culvert laying operation must begin during dry weather. During
dry weather there is normally no visible flow occurring in the stream being piped. The
culvert and headwall are both planned to be pro-cast. Depending on the availability of the
pro-cast headwalls at the time of construction, it may become necessary to cast the headwalls
in place. No fi-esh concrete will be allowed to come in contact with any waters.
5. Final Written Stormwater Mangement Plan Required before Permitted Impacts Occur.
See attached.
6. Upon Completion of this Project, the Applicant shall Complete and Return the "Permit
of Completion Form".
This requirement will be done.
7. Deed Nofification shall be Placed on all Retained Jurisdictional Wetlands, Waters, and
Protective Buffers in order to Assure Compliance for Future Wetland, Water, and
Buffer Impacts.
A deed notification has been placed on the property and is on record at the Durham County
Register of Deeds. See attached recorded deed notification.
DWQ Project No. Pxl>
DIVISM OF WATER QU&U - 401 MMINIDW DETENTION (NW POCKEM WETLAND WOW.SHEET
1, PROJECT N;OMTION (please complete the following irdormation):
ProjectName: At-INT10 4y-)?C Atb 1CQ-tW^L-
Contact Person: ILIfftz LQ PhonaNumbqr ('Alq) 6C4,-Lgic-*?'z
For pr4ectB with multiple basins, specify which basin this worksheet applies lo: 1-V
Permanent Pool Elevation 7. C I (elevation of the orifice invert out)
Ternporary Pool Elevation z5g. L?b ft (elevation of the outlet structure invert in)
Permanent Pool Surface Area 9,5`11A sq. ft (we* surface area at perrnanent pool elevation)
Drainage Area L-.',. 13 7 ac. (on-sb and off-sile drainage to the basin)
Impervious Area S'180 so. (on-site and off-oft drainage to the basin)
Forebay Surface Area 1.37 9% ft (at permanent pool elevation apprcidmalely 15V
Marsh (r-T Surface Area -4. sq. fi. (atpMM110M t pool elevation appircodmately 35V
Marsh 9*-18' Surface Area IrA-60 _ sq. 1 (at permanent pool elevation approyiniately 35%r
Micro Pool Surfim Area '37-Z - sq. IL (at permanent: pool elevation approArnately 15%r
Temporary Pool Volume 113) 1 L- (,) - cu. fL (volume detained on top of the pemment pool)

SAIDA used -;,5 z 7 (surface area to drainage area ratior
Diameter of Orifice 2.0 in, (draw down onfice diameter)
IL REQLNRED 11TEMB CHECKUST
Initial in the space provided to indicate the following design requirernents have been met and supporting documentation is attached. 118
laqW18meflihas lxyh8w /)* aobo 811 84*fl8kn of W#y. At a minimum, a complete stormwater management plan submittal includes
a workshoet for each BMP, design calculations, Mans and specifications showing all BMPs and outlet structure details, a detailed
drainage plan and a fully executed operation and maintenance agreement An incomplete submillal package will result in a request for
additional Inl1ormallon and will substantially delay final review and approval of the project
Applicants Initials
IL'3 V.; he temporary pool controls rundf from the 11 inch rain.
CV20i he basin " s4es are no sbqw than 3:1.
I/ a ta A plarft plan for the marsh areas with plant species and densities is provided.
_Vegetation above the permanent pool elevation is specified.
An emergency drain is provided to drain the basin.
V. The temporary pool draws down in 2 to 5 days.
LE ik; Sediment storage is provkled in the permanent pool.
V: A sediment disposal area is provided.
Y1%; is provided for maintenance.
U3 0 A sib specific, signed and fwWrized operation and maintenance agreement is provided.
V z 4,2, The drainage am (including any oftle area) is delineated on a see plan.
N
Access is provided for mainlenance.
1U, Plan 6; 1; 1 s for the welland we provided.
41913 Plan details for fie inlet and outlet are provided.
t?Z;) site specific operaft and maintenance agireement signed and notarized by the responsible party is provided (see
ht4)lih2o.ohnr.state.nc.ustricmlando/oandm.doc).
Pocket Wetlands have different design parameters and are only assumed to remove 35% TSS - See pp. 19 and 20 of the NC DENR
Stormwaler BMP Manual, April 1999, 10% open water, 50% high marsh, 4(Wo low marsh.
Stage-storage relationship for Alphin Hwy #55 project extended detention wetland
Note that the design invert elevation of the pond is 254.. . The pond will be overexcavated to 253.00 to account for sedimentation.
ELEV.

ft a.s.l. AREA
FOREBAY
S.f. AREA
POND
S.f. AREA
TOTAL
Sf INCR. VOL.
FOREBAY
C.f. INCR. VOL.
POND
C.f. ACCUM. VOL
FOREBAY
C.f. ACCUM. VOL
POND
C.f. ACCUM. VOL
TOTAL
C.f. WQP VOL
TOTAL
C.f.
-
253.00 229 644 873 0 0 0 0 0
254.00 362 892 1254, 0 0 0 0 0
255.00 522 1165 1687 442 1029 442 1029 1471
255.50 612 1322 1934 284 622 726 1650 2376
256.00 709 3613 4322 330 1234 1056 2884 3940
256,25 1171 4772 5943 235 1048 1291 3932 5223
256.50 1239 5469 6708 301 1280 1592 5212 6804
256.75 1308 5999 7307 318 1434 1910 6646 8556
257.00 1370 8220 9599 336 1777 2246 8423 10669
257.50 10313 15647 4978
258.00 11050 20988 10319
258.50 11778 26695 16026
258.68 12001 28835 18166
259.00 , 12478 32752
260.00 1 14004 45993

Depth Regimes by 1 99 NCDWQ BMP Manual Requirements

Goal Depth
Regime POND
Area % TOTAL
Pond Area Notes
35% 0" - 9" 3448 35.92%
35% 9" - 18" 3450 35.94%
15% 1 " - 36" 1322 13.77% micropool area only
15% 0" - 36"
I 1379 14.37% forebay area only
total 9599 100.00%
c)RAWDOWN TIME FOR 7' ORIFICE (INVERT AT 257-00)
FOR ALPHIN HWY 66 RETAIL EXTENDED DETEWTKYN WETLAND
STORM poOL VOLUME= 18. 150 C.F.
STARTING STORM POOL ELIEVATIO111" 258-66
NMMAL poOL ELEVATION- 257.W poND POND POND
TIME It4TERVAL OF `10 MIR ELLIV. ARFA VOLUMS
25B.6B 12,044 18,150
258.00 11,036 10,318
257-00 9,5W 0
am 0.114 80.11 13,1401
2 5&0 21,
em 0.113 13.GMn g
21'
700 0.113 e7,7'7i 13,00004 - 21
710 0.113 STAWO I - 25923 2t
720 0.112 21
730 0.112 21
740 0.112 6708! 12% = 22
760 M112 ?mi z
7 0.111 6613 1 25820 z
7 25819 z
Too 5039 - -- 12.4as
790 0.110 W21 IZ402r 25a lil 5
am oma 66.04 UAMW3361 259.ij Z
410 GOB? j??OL 26&1 _ ?-j
820 0.106 05.Ti 12"o 2wl",
am 0.109 asm izi3al 2M.1 z

840
OA09
8535
IZO731 25M.1 z
=8-1
1
&W omiop 6518 1 20561

am
Elm
65.01
mm 255.14
Z
I
a 0108 04.83 11,876 258.14 z
OW OADS 646M It.814 2M.131 2
890 OAOT 04.40 li, 258.121
GAOT 64.31 liM 2W 121 2
910 0107 641 11.621 -258.111 2
0,107 03 II.S571 25&111 2
-
-
-
930 0.106 63 1 i.493 10 2
ri
W
1
CAN 63 11,429 256.10 2
950 0.100 03.46 11,360 2WOG 2
960 0.105 6328 M303 258-00
970 0.105 63.1 t 11,240 258.06
ON 0?105 62Z 11.17T 2007
990 OA05 62.74 11.114 258.
1000 0.104 62M Il 1 25&N
1010 OAG4 62LI 10.989 251LOSI
IOW 0.104 e224 10.9V 2WO1
1030 0.103 62io? 10,886 255.051
1040 0.103 01.9D IOMS 2M.041
1050 0.103 81.72 10,741 25&04
7
01.55 10,079 255.03
0130 10,61a 266..
INQ 0.102 W 21 10.657 2WO21
Im 0.102 al. 10.490 1 258M]
JJW 0.101 OOBO 10.435 260.01
Ilia DAM 60000 10,374 2G&OD
il2Q 0051 10,314 258.00
1130 opioi 60,34 ion3 267M
1140 omi0o WAS ioj93 257.99
1150 0100 5995 10,13=3 .98
1180 0.100 5910 10.074 257.90
1170 0.099 $957 10.014 257.97
-7180 -0000 50.35 9.M 257M
Ti go -0 opq 5936 9.695 257.95
12DO 0.090 5sbp9 9,M 257.95
i2lo 0409a 58.80 0,"S 25725
1220 G-09A 5860 Q.7I9 MTN
1230 Q.OGT 55AI 9.801 267.94
1240 0. 58.22 9,002 25793
1250 0.097 8803 9,544 257.931
i2o o a. 5743 9,407 1257.92
127 0 0.09 8 SIZU 4 .4 257-911
J28 0 0.09 8 57.4 5 9,37 1 257211
729 0 009 5 57 9.31 4 25;tQ0
130 0 oqq" 5700 0 a 257.90
131 0 o.qw , saA 7 9 2BIA91
--i32 0 0.09 4 56.6 0 9,14 4 .89
133 10) 0,09 4 58,4 0 006 7 257M,
134 0o 0.09 4 50.2 9 9.03 1 .88
_T35 0 OM 3 . . . . . 8.97 5 257.67,
00 0 000 3 55= SA O 251.W
l3 n OM 55 7 1 &=0 3 Af
30 0 0.09 3 SS.5 2 kao s 2"o
39 C O.M 553 3 8.75 2 2STMI
140 D O.M 55.1 3 8,09 7 257.641
141 0 0= 2 549 4 8,64 2 -84
142 D 0.09 1 54.1 5 6,55 7 .33
I
143 0 0.09
" 1 54,5 5 8.S3
M 3 25 .83
144 0 0.09 1 SC M 8,47 9 257.82
14 W 0.0 00 54A 7 9.42 4 257.82
VVC I LANU Ur. 1 Cr4j JUN DA011111 UrCKA I JUN PJILJ MAIN 1 r-RAM;t: At*Kt:t:MI:N I
FOR 7.48 AC. PARCEL IN DURHAM CO. OWNED BY O.W. ALPHIN, JR.
DESCRIBED IN D.B. 3666, P. 481 IN THE DURHAM CO. REGISTER OF DEEDS
The wetland detention basin system is defined as the wetland detention basin and pretreatment including the
forebay.
Maintenance activities shall be performed as follows:
1. After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wetiand detention basin system for sediment accumulation, erosion, trash accumulation,
vegetated cover, and general condition.
b. Check and dear the orifice of any obstructions such that drawdown of the temporary pool occurs
within 2 to 5 days as designed.
2. Repair eroded areas immediately, re-seed as necessary to maintain good vegetative cover, mow
vegetative cover to maintain a maximum height of six inches, and remove trash as needed. Refer to the
approved wedand planting plan for areas to be mowed. These areas are limited to the fescue grass
areas above elevation 260.0.
3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to
maintain proper functioning.
4. Remove accumulated sediment from the wetiand detention basin system semi-annually or when depth is
reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed
of in an appropriate manner and shall be handled In a manner that will not advereely impact water quality
e. don't stockpile near the wedand detention basin or any stream, etc.). :5 F, f-
'?'- -?. V,-? on- AQ- a f,,
The measuring device used to determine the sediment elevation shall be such that it will give an
accurate depth reading and not readily penetrate into accumulated sediments.
If the elevation of the marsh areas exceed the permanent pool elevation, the sediment should be
removed to design levels. This shall be performed by removing the upper 6 inches of soil and stockpiling
it. Then the marsh area shall be excavated six inches below design elevations. Afterwards the stockpiled
soil should be spread over the marsh sunface. The soil should not be stockpiled for more than two
weeks. Replant wetland plants as needed to maintain plant density per approved plans.
When the permanent pool depth reads Z!Z5 feet in the forebay and micro-pooi, the sediment shall
be removed.
BASIN DIAGRAM
Pem-onent Pool Elevation Z5 7-d
'ed'7t Tv-o on
B ttom%
\ 75%Sediment Removal Elevati
FOREBAY
MAIN POND
Pap I of 2

5- Wetland planting densities in the marsh areas should be maintained by replanting bare areas as needed.
Wetland plants should be encouraged to grow in the marsh areas.
6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment
through the emergency drain shall be minimized to the maximum extent practical.
7. All components of the wetland detention basin system shall be maintained in good working order.
I acknowledge and agree by my signature below that I am responsible for the performance of the seven
maintenance procedures listed above. I agree to notify DWO of any problems with the system or prior to any
changes to the system or responsible party.
Print name: (). k,-4 - NX P-\?- ri - ',>-
Title* n%,4 r\zC
Lis L(Lt 1;;
Address:'P,O, 6-OX
Phone: ct '72-1
signature: C)-Q's
Date: 1 10
Note: The legally responsible party should not be a homeowners association unless more than 50% of the
lots have been sold and a resident of the subdivision has been named the president.
11 3:4? its a Notary Public for the State of
County of do hereby certify that 42a).AW; A
Personally appeared before me this day of-,-J-.O/ gqjgS;?, and acknowledge the
due execution of the forgoing wet [wetland] detention basin maintenance requirements. Witness my hand
and official seal, le__
t
CIA
COUIX-10

SEAL
My commission expires &I -
Page 2 of 2

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2004065722
F?' F T S T i?_ R 01 F D E L
C Ir?ton
DURHAM COUNTY N C
n ? i 8
2004 DE' 22 !`,? :0 :41 PM
SK: 46,50 P%G: 89,6-8^89 FEE: $171 . OL,
T
-, _tc 2 0 0 4
COMPLIANCE WITH WETLAND & BUFFER REGULATIONS
In accordance with Title IS A NCAC 211 OSOO, the fiollowing DEED NOTIFICATION
shalt be recorded in the Durharn County Registry prior to the conveyance of lots. Said
Deed Notification shall apply to the 7.36 ± ac. parcel known by the following parcel
identification PIN 0738-03-01-8050 in Durham County, North Carolina as shown on
plans titled "Survey for O.W. Alphin, Jr." prepared by S.D. Puckett & Associates. Inc.
dated: December 1, 2003.
"A portion of this lot has been determined to meet the requirements for
designation as a strearn wetland as described by the attached survey plan. Any
subsecitient fifl or alteration of this area shall conform to the reauireirients of the state
rLdes adopted by the State of North Carolina it) force at the time of the proposed
afteration. The intent of this provision is to prevent additional wetland. stream or hiiffif-r
Tiffing or draining, so the property owner should riot assume that a future application for
'filling or draining would Iye, approved. The property owner shall report the name of the
I application pertaining to said rules. This covenarit is intended to
sub
L, division 'in any lin ai
ensure continued compliance with all rules adopted by the State of North Caro a id
therefore the State of North Carolina may enforce benefits. This covenant is to run with
the, ]and and shall be binding on all Parties and all persons claiming under them".
i a a t u r e
iy) I ?_,
O,wner's name: O.W. Alphin, Jr.
Address: 1910 Sedwick Rd., Suite 200 A
City, State, Zip Code: Durham, N.C., 27713
Phone Number- [phone]
STA,rE OF North Carolina
DURHAIM COUNTY
,,e r
a Notarv Public of the State of North
;el __ k- r,)personal y
Carolina ?YZ/_ County, hereby certif5y that owne'
appeared before me this day and executed by above certification.
da,v of
Witl ss my hand and notorial seat, this
C.?
e
Notarv Public
My commission expi
ffes: 5-
e.
Z?
Wrenn
Engineering
Company
FILE COPY
John Dornv
N.C. Division of Water Quality
Wetlands/401 Unit
2321 Crabtree Blvd.
Raleigh, N.C.
27604-2260

Re: Alphin Property, Durham, N.C. (Cape Fear Basin.)
John,
1910 Sedwick Rd., Suite 2M-C
Durlimn, N.C. 27713
Voice 919.806.5082
FAX [phone]
ken.wrciui verizon.net
5-28-04
Please find attached seven copies of a PCN for the above referenced project and a submittal
fee of $475.00 stapled to this cover letter. Attached to each PCN is a vicinity map stapled to the
end of each form and a set of three I 1 x 17 drawings.
The "DWQ1" drawing illustrates the existing conditions and the locally impose (City of
Durham) 50' and 100' stream buffers. The 50' buffer corresponds to a low density scenario and
the 100' buffer corresponds to a high density scenario. Although the 50' buffer applies here at
this time, the 100' buffer is illustrated to clearly show the large impact it has on the site if
developed to over 24% impervious.
The "DWQ2" drawing illustrates the proposed phase one development. Phase one involves
piping 539 l.f of the north to south flowing non jurisdictional intermittent isolated stream with
two 48" rcp culverts with headwalls and rip-rap protection at both ends, clearing and grading a
large portion of the site to support the phase two development, constructing an extended detention
wetland sized to support the full build out of the entire site (70% impervious), and converting the
existing house to retail and office uses with a 1,000 s.f addition and supporting parking area.
The "DWQ3" drawing illustrates the proposed conceptual phase two development. The
phase two development consists of up to 70,000 s.f of building footprint and supporting parking
areas. The remainder of the locally imposed stream buffer is illustrated. The grades illustrated
are representative of phase two grading and will be modified to accommodate the building and
parking areas. All site generated runoff will be routed to the extended detention wetland BMP.
The final buildout will near the 70% impervious limit.
We currently have a site plan submitted to the city of Durham and will require written
authorization to pipe the 5391.f. of subject stream. Thank you for coming out to the site. Please
call if you have any questions or need additional information.
Sin erely,
WETLANDS [ 401 f fROUP
Kenn h B. Wrenn, P.E.
yg4? '
President
cc. Wendell Alphin, Owner WATER QUALI Y SEC<i OiN
MW-090#571 t C-6%AS k0ti
Office Use Only: 0 408 8 5FoTm Version May 2002
USACE Action ID No. DWQ No.
/Tf nnv nnr,ir„lnr item is not annlicahle to this nrniect_ please enter "Not ADAicable" or "N/A".)

1. Processing
1. Check all of the approval(s) requested for this project:
? Section 404 Permit ? Riparian or Watershed Buffer Rules
? Section 10 Permit ® Isolated Wetland Permit from DWQ
? 401 Water Quality Certification
2. Nationwide, Regional or General Permit Number(s) Requested: W /A
3. If this notification is solely a courtesy copy because written approval for the 401 Certification
is not required, check here: ? N/
4. If payment into the North Carolina Wetlands Restoration Program (NCWRP) is proposed for
mitigation of impacts (verify availability with NCWRP prior to submittal of PCN), complete
section VIII and check here: ? ?1 /A
5, if your project is located in any of North Carolina's twenty coastal counties (listed on page
4), and the project is within a North Carolina Division of Coastal Management Area of
Environmental Concern (see the top of page 2 for further details), check here: ? N/A
H. Applicant Information
1. Owner/Applicant Information
Name: QLI ?E S la?
Mailing Address: 19 1 O
Telephone Number: 919 - "(o
E-mail Address: A L 4 P4I N oL, (
Fax Number: q 19.--
2. Agent/Consultant Information (A signed and dated copy of the Agent Authorization letter
must be att ched if the Agent has signatory authority for the owner/applicant.)
Name: &tIAle'ri.J 13, LJ1Z9_NW a, 6,
Company Affiliation: W Izffi-30 ?>?lNl£ t N? t?Wll?A+?Y
Mailing Address: 191D '1 Drutc.K , SOC'? OD-C
Telephone Number:
E-mail Address: Y
Page 5 of 12
Fax Number: I 11-bM,
III. Project Information
Attach a vicinity map clearly showing the location of the property with respect to local
landmarks such as towns, rivers, and roads. Also provide a detailed site plan showing property
boundaries and development plans in relation to surrounding properties. Both the vicinity map
and site plan must include a scale and north arrow. The specific footprints of all buildings,
impervious surfaces, or other facilities must be included. If possible, the maps and plans should
include the appropriate USGS Topographic Quad Map and NRCS Soil Survey with the property
boundaries outlined. Plan drawings, or other maps may be included at the applicant's discretion,
so long as the property is clearly defined. For administrative and distribution purposes, the
USACE requires information to be submitted on sheets no larger than I1 by 17-inch format;
however, DWQ may accept paperwork of any size. DWQ prefers full-size construction
drawings rather than a sequential sheet version of the full-size plans. If full-size plans are
reduced to a small scale such that the final version is illegible, the applicant will be informed that
the project has been placed on hold until decipherable maps are provided.
I . Name of project: AL 1'1+10 A toy 4-55 ?_ ETA L
2. T.I.P. Project Number or State Project Number (NCDOT Only): WA
3. Property Identification Number (Tax PIN): (a73K.- 0-3--C_*-805
4. Location
County: 17yZ46tA Nearest Town:Z1k4KVA_
Subdivision name (include phase/lot number): M 14
Directions to site (include road numbers, landmarks, etc.): Fszoµ Rte-&W' iaeSrati1,-4Q
OI-1 Fz N?? '?iDl? y i- N?- rtw`C ss'era..
JVC'1 1,1TIJ IS
Z _7
W 1?t _ T +* -3 - 0
5. Site coordinates, if available (UTM or LabUng): 0-T#A i -7(o83 S1a8 C 397443514
(Note - If project is linear, such as a road or utility line, attach a sheet that separately lists the
coordinates for each crossing of a distinct waterbody.)
6. Property size (acres): 7. 31w AC
7. Nearest body of water (stream/river/sound/ocean/lake): l4 o zTI EASTC 909- .
8. River Basin: L&M FEA
(Note - this must be one of North Carolina's seventeen designated major river basins. The
River Basin map is available at iitt;
9. Describe the existing conditions on the site and general land use in the vicinity of the project
at the time of this application: SiTe 4A5, P. V Achim i oO 11%XC0iNteS' /fir U
TW_ Z S 3"ILC'T ICI/J?
??? L? 4zr1?211J(o
i'S /i. (o(COwI??/.? L7 Q3AtJ WltiUboR r 5-0 A21cgS L- simer-OAL fl OFFI? hZ
IN??ST1ZIAt.. ?Si?S,
Page 6 of 12
10. Describe the overall project in detail, including the type of equipment to be used: TI}1- PRoZVk1
WILL far- 'Dp ze to Apt LIFA.$- r..oPtFM S. T0C MASS o-c 0-3W0 ,J¢S 'i 0104-1m, TIM S'
(PRprD?Nto 7xk* SCM , A-*)o IN3rALUt W4, MA iEjC 'dw4D1Fb DCTE.K-notJ CMAsAb 1JISSl6t??1J
Fotr '70 tt; P??t ?? hl-?A ?asy'¢¢r•ew?4, T?ll 66ye 5,7- A. Sktlc?- 12?.rx+?
a'°3 7T.sQ INduty?S fa?sT?xTt=_srF op io -70 -,F. ?rJ ioApOtft3k.Ooi?bl046
Fh?o 1? K1_ o S? ?T o ooU S,Ff ol= 3ar Im?u u:?i`dL w??-+- Q¢
Acc,'Npustiar,> PITA Ttw ?%SC v F AAS, r-eoNt ll Lc?DtG?s? DortQS/ si+¢¢iA>r%X), , rKW..*9S) .±tr-,
11, Explain the purpose of the proposed work: TIC of TtAS u?:cw i o_ zO&.ZP
1S P-1tGOLZED To re-A.A tZk'M 3:ft? joO, 5"' V* &F-evQ 'rgwr i,' izaacNte
$? T1Q Ct[?t ©F)ost-1AM IF ' I*Z ST'QitAwl IS t3cT t?TP .
IV. Prior Project History
If jurisdictional determinations and/or permits have been requested and/or obtained for this
project (including all prior phases of the same subdivision) in the past, please explain. Include
the USACE Action ID Number, DWQ Project Number, application date, and date permits and
certifications were issued or withdrawn. Provide photocopies of previously issued permits,
certifications or other useful information. Describe previously approved wetland, stream and
buffer impacts, along with associated mitigation (where applicable). If this is a NCDOT project,
list and describe permits issued for prior segments of the same T.I.P. project, along with
construction schedules.
0s AC ¢ A.rTIoa T-13 is 71004021z. rtfic Zes,3 Ti ot_ jpen P*4eo kA;r Is 6A-pz
V. Future Project Plans
Are any future permit requests anticipated for this project? If so, describe the anticipated work,
and provide justification for the exclusion of this work from the current application.
VI. Proposed Impacts to Waters of the United States/Waters of the State
It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to
wetlands, open water, and stream channels associated with the project. The applicant must also
provide justification for these impacts in Section VII below. All proposed impacts, permanent
and temporary, must be listed herein, and must be clearly identifiable on an accompanying site
plan. All wetlands and waters, and all streams (intermittent and perennial) must be shown on a
delineation map, whether or not impacts are proposed to these systems. Wetland and stream
evaluation and delineation forms should be included as appropriate. Photographs may be
included at the applicant's discretion. If this proposed impact is strictly for wetland or stream
mitigation, list and describe the impact in Section VIII below. If additional space is needed for
listing or description, please attach a separate sheet.
Page 7 of 12
1. Provide a written description of the proposed impacts: Pi o to aND
539 L. g o s:.' i Lire e tt 1 rr a.-ax r e ff aw T f*r t 3 toS i 5LxLA'7Z w rt rf A+Jt .
2. Individually list wetland impacts below:
Wetland Impact
Site Number
(indicate on rna)
Type of Impact* Area of
Impact
(acres) Located within
100-year Floodplain**
(yes/no) Distance to
Nearest Stream
(linear feet)
Type of Wetland***
14 /A

* List each impact separately and identify temporary impacts. Impacts include, but are not limited to: mechanized cleating, grading, till,
excavation, flooding, ditching/drainage, etc. For dams, separately list impacts due to both structure and flooding.
** 100-Year floodplains are identified through the Federal Emergency Management Agency's (FEMA) Flood Insurance Rate Maps
(FIRM), or FEMA-approved local floodplain maps. Maps are available through the FEMA Map Service Center at 1-800-358-9616, or
online at ,.;
*** List a wetland type that best describes wetland to be impacted (e.g., freshwater/saltwater marsh, forested wetland, beaver pond,
Carolina Bay, bog, etc.) Indicate if wetland is isolated (determination of isolation to be made by USAGE only).
Nor ???c",o4w-e
List the total acreage (estimated) of all existing wetl$$nds on the property: _Q -7 t f
NoT 1?-?c.??a?? S'CR?.AaM.S
Total area of wetland impact proposed: O C.
3. Individually list all intermittent and perennial stream impacts below:
Stream Impact
Site Number
(indicate on ma)
Type of Impact* Length of
Impact
(linear feet)
Stream Name** Average Width
of Stream
Before Impact Perennial or
Intermittent?
easespecify)
1 tve?r Rtp- 631 + oWtEWr 7'rO&-To6
?.yrti?Rw?tm?sr

List each impact separately and identify temporary impacts. Impacts include, but are not limited to: culverts and associated np-rap,
dams (separately list impacts due to both structure and flooding), relocation (include linear feet before and after, and net loss/gain),
stabilization activities (cement wall, rip-rap, crib wall, gabions, etc.), excavation, ditching/straightening, etc. If stream relocation is
proposed, plans and profiles showing the linear footprint for both the original and relocated streams must be included.
R• Stream names can be found on USGS topographic maps. If a stream has no name, list as UT (unnamed tributary) to the nearest
downstream named stream into which it flows. USGS maps are available through the USGS at 1-800-358-9616, or online at
j 11 I\. Several intemet sites also allow direct download and printing of USGS maps (e.g., n r nn,
u,, etc.).
Cumulative impacts (linear distance in feet) to all streams on site: 5J 39
Page 8 of 12
USACE - In accordance with the Final Notice of Issuance and Modification of Nationwide
Permits, published in the Federal Register on March 9, 2000, mitigation will be required when
necessary to ensure that adverse effects to the aquatic environment are minimal. Factors
including size and type of proposed impact and function and relative value of the impacted
aquatic resource will be considered in determining acceptability of appropriate and practicable
mitigation as proposed. Examples of mitigation that may be appropriate and practicable include,
but are not limited to: reducing the size of the project; establishing and maintaining wetland
and/or upland vegetated buffers to protect open waters such as streams; and replacing losses of
aquatic resource functions and values by creating, restoring, enhancing, or preserving similar
functions and values, preferable in the same watershed.
If mitigation is required for this project, a copy of the mitigation plan must be attached in order
10- lr USACL or D` V Q to consiuer the application complete for processing. Any application
lacking a required mitigation plan or NCWRP concurrence shall be placed on hold as
incomplete. An applicant may also choose to review the current guidelines for stream restoration
in DWQ's Draft Technical Guide for Stream Work in North Carolina, available at
Impi 112s',-oll' sUllc,11C 11" m ` (.?i 1;1! ad
Provide a brief description of the proposed mitigation plan. The description should provide
as much information as possibie, including, but not limited to: site location (attach directions
and/or map, if offsite), affected stream and river basin, type and amount (acreage/linear feet)
of mitigation proposed (restoration, enhancement, creation, or preservation), a plan view,
preservation mechanism (e.g., deed restrictions, conservation easement, etc.), and a
description of the current site conditions and proposed method of construction. Please attach
a separate.sl?eet if more space is needed.
2. Mitigation may also be made by payment into the North Carolina Wetlands Restoration
Program (NCWRP). Please note it is the applicant's responsibility to contact the NCWRP at
[phone] to determine availability and to request written approval of mitigation prior
to submittal of a PCN. For additional information regarding the application process for the
NCWRP, check the NCWRP website at 1 ,11) Il'? ?,l ,i:;! c lit -Us %\]I) 11hi • ' 111 111. If use of
the NCWRP is proposed.. please check the appropriate box on page three and provide the
tollowing information:
Amount of stream mitigation requested (linear feet): _ Ila
Amount of buffer mitigation requested (square feet): A
Amount of Riparian wetland mitigation requested (acres): A
Amount of Non-riparian wetland mitigation requested (acres):_ Q
N /A
Amount of Coastal wetland mitigation requested (acres):
iage iv of
IX. Environmental Documentation (required by DWQ)
Does the project involve an expenditure of public (federal/state) funds or the use of public
(federal/state) land?
Yes 1:1 No LN
If yes, does the project require preparation of an environmental document pursuant to the
requirements of the National or North Carolina Environmental Policy Act (NEPA/SEPA)?
Note: If you are not sure whether a NEPA/SEPA document is required, call the SEPA
coordinator at [phone] to review current thresholds for environmental documentation.
Yes ? No ? N/A
If yes, has the document review been finalized by the State Clearinghouse? If so, please attach a
copy of the NEPA or SEPA final approval letter.
Yes ? No ? fA'Qr
X. Proposed Impacts on Riparian and Watershed Buffers (required by DWQ)
It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to
required state and local buffers associated with the project. The applicant must also provide
justification for these impacts in Section VII above. All proposed impacts must be listed herein,
and must be clearly identifiable on the accompanying site plan. All buffers must be shown on a
map, whether or not impacts are proposed to the buffers. Correspondence from the DWQ
Regional Office may be included as appropriate. Photographs may also be included at the
applicant's discretion.
Will the project impact protected riparian buffers identified within 15A NCAC 2B .0233
(Neuse), 15A NCAC 2B .0259 (Tar-Pamlico), 15A NCAC 2B .0250 (Randleman Rules and
Water Supply Buffer Requirements), or other (please identify C J%f of 6 oZWK t doFFgeS )?
Yes ? No ? If you answered "yes", provide the following information:
Identify the
mitigation is
multipliers.

square feet and acreage of impact to each zone of the riparian buffers. If buffer
required calculate the required amount of mitigation by applying the buffer
Mcriz'

Zone* Impact
(square feet) Multiplier
T Required
Mitigation
1 33196 3 ly
2 --
2-2 so 1.5 Ia
Total 5(p 37S P Qc
* Zone I extends out 30 feet perpendicular from near bank of channel; Gone 1 extends an
additional 20 feet from the edge of Zone 1.
lz-? COOP "'E4
l,om 'k b oQA +ncw'S Ludic tr tUVj1>s1L% S MI-Avk 3 oF*ViZS, A r
Olrz,: "MM t*WNM %Tftf%ZN is r3ASFED oN A. sd--.- atk$A 9 0FFO-J?>-,
tP*%-t--N Si'Tt bifi "o4rL*-r-, (,oaS oQn4->- Zsb, ttltpmao,ouS
nt+? 3? ?e i w p S S flATSO 3 t't w d s Alit t_ P'b'S 04'W% w L 4
Lc)c.ouh t atpoSatb S-%tfLAUt %%U Wv4Zs 1*3? 76oe t t I ,c? t-5 oT Rye c??s?z ??
TrY¢ rf 3 SS too wt 62 Xv- 1o T'1't'15c.t we paocr w tL4- 91E
Page 11 of 12
Iig?33os?, i}'ct.oai?-ab Tam 1j-cra«z?a%j °vrw,-nc&3 ???-n. ?I?RaaL.
If buffer mitigation is required, please discuss what type of mitigation is proposed (i.e., Donation
of Property, Conservation Easement, Riparian Buffer Restoration / Enhancement, Preservation or
Payment into the Riparian Buffer Restoration Fund). Please attach all appropriate information as
identified within 15A NCAC 2B .0242 or .0260.
XI. Stormwater (required by DWQ)
Describe impervious acreage (both existing and proposed) versus total acreage on the site.
Discuss stormwater controls proposed in order to protect surface waters and wetlands
downstream from the property.
tC,c?c?.yr_ ?uns.c???out.?at? `,(,20s. d,083Kb1-: ?I+ASf- OIL 1M1P?2Utoy5t?g!
?. ?c-ie?x??D p? nom 0EV-#i-zt, F,k1j?b %A iL 37- 1,z?STALLMb r-02 W%Tss Races.
X1I. Sewage Disposal (required by DWQ) 't I°'SrC>iL#A 1Z,O-a-or-S
Clearly detail the ultimate treatment methods and disposition (non-discharge or discharge) of
wastewater generated from the proposed project, or available capacity of the subject facility.
NASZ OWE WIt4, uri!_c2.0- T+*, xtasri" tnftrwaIr Smpnrc, F%eEc.n to Fuz-&z pe t¢
i? sr?. o "1't???,>£ T'?o wl" urtU r-M •rtM ?UBa aC S603MIZ VfSTWU 7-t+&T i3oaoates
-R41r, ?7_C pnWrLE TO-OIL <,00-m fo-),b
XIIL Violations (required by DWQ)
Is this site in violation of DWQ Wetland Rules (15A NCAC 2H.0500) or any Buffer Rules?
Yes ? No U
Is this an after-the-fact permit application?
Yes ? No
XIV. Other Circumstances (Optional):
It is the applicant's responsibility to submit the application sufficiently in advance of desired
construction dates to allow processing time for these permits. However, an applicant may
choose to list constraints associated with construction or sequencing that may impose limits on
work schedules (e.g., draw-down schedules for lakes, dates associated with Endangered and
Threatened Species, accessibility problems, or other issues outside of the applicant's control).

Z5
Applicant/Agent's Signature Date
(Agent's signature is valid only if an authorization letter from the applicant is provided.)
Page 12 of 12

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CSX-RAILROAD
(STING) 100' R\
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Surveyed by
('aunty ul PURI IA M
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S.P. PLICkOt- & Assoc., Inc.
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O.W. Alphin, Jr.
PI-mvn by SurV(•); I)(lt(': n '
I (/ I f L Z I P] It)t Dalc': 121(1, /0 ?,
I Ownshil) O(f Kl/W( I.I I ?l(1t(' 0 N.( _.I I ie: 5U (4 ~F?
--I z
F WA TF Michael F. Easley, Governor
O
9
? Q William G. Ross Jr., Secretary
O
G North Carolina Department of Environment and Natural Resources
r Alan W. Klimek, P. E. Director
'i
U `C Division of Water Quality
Coleen H. Sullins, Deputy Director
Division of Water Quality
Mr. Oliver Alphin, Jr.
1910 Sedwick Road
Suite 200A
Durham, NC 27713
Dear Mr. Alphin:
July 20, 2004
RE: Isolated Wetland Permit Approval
Subject property: Alphin Property at NC 55 near NC 54
WQC Project # 04-0885
Durham County
Attached hereto is a copy of Isolated Wetland Permit No. 13 issued to Oliver Alphin, Jr.
for the Alphin Property project dated July 20, 2004.
If we can be of further assistance, please do not hesitate to contact us.
Sincerely,
Attachments
Klime , P.E.
CC: Steve Mitchell, Raleigh DWQ Regional Office
File copy
Central files
Kenneth Wrenn, Wrenn Engineering Company, 1910 Sedgewick Rd, Suite 200-C,
Durham, NC 27713
Todd Tugwell, US Army Corps of Engineers - Raleigh Field Office
Filename: 040885Aplhin(Durham)ISOcover
N. C. Division of Water Quality, 401 Wetlands Certification Unit,
1650 Mail Service Center, Raleigh, NC 27699-1650 (Mailing Address)
2321 Crabtree Blvd., Raleigh, NC 27604-2260 (Location) N=NR
[phone] (phone), 919-733-6893 (fax), (hfto://h2o.enr.state.nc.us/ncwetlands)
W AT ?9pG
F/ r
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P. E. Director
Division of Water Quality
Coleen H. Sullins, Deputy Director
Division of Water Quality
North Carolina Isolated Wetland Permit
This Permit is issued in conformity with the requirements of the North Carolina Division of
Water Quality (DWQ) Regulations in 15 NCAC 2H, Section 0.1300. It is issued to Oliver
Alphin, Jr. resulting in impact to 539 feet of isolated, intermittent streams in Durham County
pursuant to an application filled on May 28, 2004 to construct the commercial development at NC
55 near NC 54 (PIN Number 0738-03-01-8050).
The application provides adequate assurance that the discharge of fill material into wetlands in
the watershed of Northeast Creek and Jordan Lake in conjunction with the proposed development
will not result in a violation of applicable Water Quality Standards and discharge guidelines.
Therefore, the State of North Carolina certifies that this activity will not violate the applicable
proportions of Section 301, 302, 303, 306, 307 of PL 92-500 and PL 95-214 if conducted with the
applicable and conditions hereinafter set forth.
This approval is only valid for the purpose and design that you. submitted in your application, as
described in application dated May 28, 2004. If you change your project, you must notify us and
send a new application for a new Permit. If the property is sold, the new owner must be given a
copy of this Permit and approval letter and is thereby responsible for complying with all
conditions. If total wetland fills for this project (now and in the future) exceed one acre or total
perennial stream impact exceeds 150 feet, compensatory mitigation may be required as described
in 15A NCAC 2H.1300. For this approval to be valid, you must follow the conditions listed
below. In addition, you should get any other federal, state or local permits before you go ahead
with your project including (but not limited to) Sediment and Erosion Control, Coastal
Stormwater, Non-discharge and Water Supply watershed regulations.
Condition(s) of Permit:
1. Impacts Approved
The following impacts are hereby approved as long as all of the other specific and general
conditions of this Certification (or Isolated Wetland Permit) are met. No other impacts are
approved including incidental impacts:
Amount Approved
(Units) Plan Location or Reference
Stream 539 (feet) May 28 application
2. Appropriate sediment and erosion control practices must be utilized, which equal or exceed
those outlined in the most recent version of two manuals, either "North Carolina Sediment
and Erosion Control Planning and Design Manual" or the "North Carolina Surface Mining
Manual" (available from the Division of Land Resources in the DEHNR Regional or Central
Offices). The control practices shall be utilized to prevent exceedances of the appropriate
turbidity water quality standards (50 NTUs in all fresh water streams and rivers not
designated as trout waters; 25 NTUs in all lakes and reservoirs, all saltwater classes; and 10
NTUs in trout waters);
N. C. Division of Water Quality, 401 Wetlands Certification Unit,
1650 Mail Service Center, Raleigh, NC 27699-1650 (Mailing Address)
2321 Crabtree Blvd., Raleigh, NC 27604-2260 (Location)
[phone] (phone), 919-733-6893 (fax), (htto://h2o.enr.state.nc.us/ncwetlands)
Customer Service #: 1-877-623-6748
Applicant:
Page 2 of 3
Date:
All temporary sediment and erosion control measures placed in wetlands or waters shall be
removed and natural grade restored after the Division of Land Resources has released the
project;
4. Measures shall be taken to prevent live or fresh concrete from coming into contact with
waters of the state until the concrete had hardened;
An additional condition is that a final written stormwater management plan shall be approved
by this Office before the impacts specified in this Permit occur. The stormwater management
plan must include plans and specifications for an extended detention wetland facility
designed to remove 85% TSS according to the most recent NC DENR Stormwater Best
Management Practices Manual. Also, before any permanent building is occupied at the
subject site, the facilities, as approved by this Office shall constructed and operational, and
the stormwater management plan, as approved by this Office shall be implemented;
6. Upon completion of this project, the applicant shall complete and return the enclosed "Permit
of Completion Form" to notify DWQ that all work included in the Wetland Permit has been
completed. The responsible party shall complete the attached form and return it to the
401/Wetland Unit of the Division of Water Quality;
Deed Notifications: Deed notifications or similar mechanisms shall be placed on all retained
jurisdictional wetlands, waters and protective buffers in order to assure compliance for future
wetland, water and buffer impact. These mechanisms shall be put in place prior to impacting any
wetlands, waters and/or buffers approved for impact under this Certification Approval and
Authorization Certificate. A sample deed notification can be downloaded from the 401/Wetlands Unit
web site at http://h2o.enr.state.nc.us/ncwetlands. The text of the sample deed notification may be
modified as appropriate to suit to this project.
If this Permit is unacceptable to you, you have the right to an adjudicatory hearing upon written request
within sixty (60) days following receipt of this Permit. This request must be in the form of a written
petition conforming to Chapter 150B of the North Carolina General Statutes and filed with the Office of
Administrative Hearings, 6714 Mail Service Center, Raleigh, N.C. 27699-6714. If modifications are
made to an original Permit, you have the right to an adjudicatory hearing on the modifications upon
written request within sixty (60) days following receipt of the Permit. Unless such demands are made,
this Permit shall be final and binding.
This the 20th day of July 2004
DIVISION OF WATER QUALITY
AWK/jrd
n . Klimek, E.
Filename: 040885Alphin(Durham)ISOapp
Project Name: Alphin Ret.
Project No. DWQ 040885
SUBMITTED DESIGN:
elevations
Permanent Pool (ft) 257
Temporary Pool (ft) 258.68
areas
Permanent Pool SA (sq ft) 9599
Drainage Area (ac) 6.137
Impervious Area (ac) 5.18
Forebay (ft2) 971
High Marsh (ft2) 7397
Low Marsh (ft2) 459
Micropool (ft2) 1190
volumes
Temporary Pool (cu ft) 18150
other parameters
SA/DA 3.53
Orifice Diameter (in) 2
Design Rainfall (in) 1
Linear Interpolation of Correct SAIDA***
% Impervious
Next Lowest 80
Project Impervious 84.4
Next Highest 90
r At,) I - Zb • 0 5
W/L 1
REQUIRED DESIGN:
3
1.68 ft. depth ok
9430 so. ft. ok
84.4 %
10.115637 % 15 checkforebc
77.1 % -;56 check marsh
4.8 % ,j check marsh
12.397125 % I ?j- check micro,
104.3546%
18037 c ok
3.53
0.10 cfs drawdown
2.2 day drawdown ok
3 ft. Permanent Pool Depth
SA/DA from Table
3.36
3.53
3.74

NCDENR
North Carolina Department of Environment and Natural
Division of Water Quality
Michael F. Easley, Governor
January 31, 2005
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Mr. Oliver Alphin, Jr.
1910 Sedwick Road, Suite 200A
Durham, NC 27713
Subject Property: Alphin Property at NC 55 near NC 54
REQUEST FOR MORE INFORMATION-Stormwater Management Plan
Resources
William G. Ross, Jr., Secretary
Alan W. Klimek, P.E,, Director
DWQ Project # 04-0885
Durham County
On January 11, 2005, the Division of Water Quality (DWQ) received the Storm Water Management Plan
prepared by your engineer, Mr. Kenneth Wrenn, P.E., of Wrenn Engineering Company, to comply with
the conditions of Isolated Wetland Permit No. 13 issued on July 20, 2004.
The Plan was unacceptable for the following reasons:
The extended detention wetland must be designed in accordance with the 1999 Stormwater BMP Manual.
This is located on the DWQ website: http:Hh2o.enr.state.nc.us/ncwetlands/mitresto.html. The
deficiencies in the submitted plan included the following:
• Ratios for each portion of the wetland must be in closer proximity to those in the Manual.
• Extended detention wetland depths must be in accordance with the BMP Manual.
• The amount of impervious surface area exceeds 70%; DWQ has calculated your on-site
impervious surface area to be 83.95%. Please explain this difference.
• Please provide information regarding inlet and outlet velocities.
Please respond within three (3) weeks of the date of this letter by sending three (3) copies this information
in writing. This letter only addresses the Stormwater Management Plan review and does not authorize
any impacts to wetlands or streams until the Plans are approved. Please email Ms. Cynthia Van Der
Wiele, Ph.D. at cynthia.vanderwieleCa)ncmail.net if you have any questions regarding these issues.
Sincerely,
(V 11?
Cyndi B. Karoly
DWQ, Wetlands / 401 Unit
CBK/cvdw
cc: DWQ Raleigh Regional Office
USACE Raleigh Regulatory Field Office
File Copy
Central Files
Kenneth Wrenn, Wrenn Engineering Co., 1910 Sedwick Rd., Suite 200-C, Durham, NC 27713
401 Wetlands Certification Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650 One
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604 North Carolina
Phone: [phone] / FAX [phone] / Internet: http://h2o.enr.state.nc.us/ncwetlands Nahmall'ff
An Pniml r)nnnrhinihdAffirnnnfiva Artinn Fmnlnvar - 5n°/ Rar\/rlar1/tn°/ PnCf r:nnclln ar PAnar
DWQ Project No. 04-- O B S E
DIVISION OF WATER QUALITY - 401 EXTENDED DETENTION (and POCKET*) WETLAND WORKSHEET
1. PROJECT INFORMATIONplease complete the following information):
Project Name : A L? I 0 t1-
Contact Person: r= Phone Number. (f11q) `,0C ,-SOS Z_
For projects with multiple basins, specify which basin this worksheet applies to: N I A
Permanent Pool Elevation Z5 7, G ft. (elevation of the orifice invert out)
Temporary Pool Elevation Z?i8, C_? ft. (elevation of the outlet structure invert in)
Permanent Pool Surface Area 4 5`1I sq. ft. (water surface area at permanent pool elevation)
Drainage Area G. , 13 7 ac. (on-site and off-site drainage to the basin)
Impervious Area 5 t 13C> ac. (on-site and off-site drainage to the basin)
Forebay Surface Area 971 sq. ft. (at permanent pool elevation approximately 15%)*
Marsh 0"-9" Surface Area 1 3611 sq. ft. (at permanent pool elevation approximately 35%)*
Marsh 9"-18" Surface Area 45`1 sq. ft, (at permanent pool elevation approximately 35%)*
-4 Micro Pool Surface Area I I I r Ci sq. ft. (at permanent pool elevation approximately 15%)*
Temporary Pool Volume 1 cu. ft. (volume detained on top of the permanent pool)
SA/DA used Z7 Z (surface area to drainage area ratio)*
Diameter of Orifice a:.O in. (draw down orifice diameter)
Ii. REQUIRED ITEMS CHECKLIST
Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. ffa
mquirementhas notbeen met, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes
a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed
drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for
additional information and will substantially delay final review and approval of the project
tJ The temporary pool controls runoff from the 1 inch rain.
The basin side slopes are no steeper than 3:1.
C6 V_? A planting plan for the marsh areas with plant species and densities is provided.
v.y Vegetation above the permanent pool elevation is specified.
V_A v3 An emergency drain is provided to drain the basin.
43 The temporary pool draws down in 2 to 5 days.
16313 Sediment storage is provided in the permanent pool.
;,-3 A sediment disposal area is provided.
L5Vw Access is provided for maintenance.
166 " A site specific, signed and notarized operation and maintenance agreement is provided.
IC.B The drainage area (including any offsite area) is delineated on a site plan.
LZ11-N Access is provided for maintenance.
4 Plan details for the wetland are provided.
kB V Plan details for the inlet and outlet are provided.
IL%, vi A site specific operation and maintenance agreement, signed and notarized by the responsible party is provided (see
http://h2o.ehnr.state.nc.us/ncwetlands/oandm.doc).
* Pocket Wetlands have different design parameters and are only assumed to remove 35% TSS - See pp. 19 and 20 of the NC DENR
Stormwater BMP Manual, April 1999.10% open water, 50% high marsh, 40% low marsh.

o2t1.I.+A?I. FoiZO•I?COw?Q
Wrenn
Engineering
Company
John Dorny
N.C. Division of Water Quality
Wetlands/401 Unit
2321 Crabtree Blvd.
Raleigh, N.C.
27604-2260
1910 Sedwick Rd., Suite 200-C
Durham, N.C. 27713
Voice 919.806.5082
FAX [phone]
ken.wrenn&verizon.net
p@1R=OW[M D p 1-10-05
JAN 1 1 2005
DENR - WATER QUALITY
WETLANDS AND 8TORMWATER BRANCH
Re: Alphin Property, Durham, N.C. (Cape Fear Basin.)
Final written storm water management plan for WQC Project # 04-0885.
John,
Please find attached one original and two copies of the final written storm water management
plan for the above referenced project. Each copy includes the following information:
1. A written narrative.
2. A site plan.
3. A BMP worksheet.
4. A site specific operations and maintenance agreement.
5. Supporting calculations.
If you have any questions or concerns, please feel free to contact me at my office.
Sincerely, LtUL
Keine' B. Wrenn, P.E.
President
g o
l w:
? G
Cc. Wendell Alphin, Jr.
Narrative:
This project is comprised of a 7.36 acre property that is proposed to be developed in two
phases.
Phase One involves piping 539 l.f. of an un-named isolated intermittent stream of the Cape
Fear basin, constructing an extended detention wetland BMP designed for future buildout of 70%
impervious, and converting the existing house to a small retail operation.
Phase Two involves developing the entire property as commercial uses and reaching the
maximum allowed 70% imperviousness. All stormwater runoff from impervious areas associated
with the proposed development will be routed to the extended detention wetland.
Site Plan: (See attached)
There are four drawings in the set as follows:
"WQ1" drawing illustrates the phase one and phase two development of the project site. The
extended detention wetland is being constructed with phase one to handle full buildout of the site.
The full buildout will be 70% impervious as indicated on the original PCN application on file at
your office. Note that the actual building and parking arrangement may vary some, but the
impervious area will be kept to no more than 70%.
"WQ2" drawing illustrates the details of the wetland facility.
"C-3A" drawing illustrates the erosion control plan for phase one.
"C-3B" drawing illustrates the erosion control plan details for phase one.
Extended Detention Wetland Worksheet: (See attached)
A u:, v .2 \c l> " ¢ - ?5 tk T A,,-Ntnk-i
A Site Specific Operations and Maintenance Agreement: (See attached)
The template O&M document provided by NCDWQ was revised to pertain to the project
facility.
Supporting Calculations:
Extended Detention Wetland (EDW) for 85% TSS reduction
Phase 1 Data:
Onsite DA to EDW bypassing YCB-1 = 1.634 ac.
Onsite DA to EDW via YCB -1 = 4.009 ac.
Offsite DA to EDW bypassing YCB -1 = 0.013 ac.
Offsite DA to EDW via YCB -1 = 0.210 ac.
Total DA to EDW = 5.866 ac.
% imperviousness of 7.36 ac. site = 3.83%
Phase 2 Data:
Onsite DA to EDW bypassing YCB-1 = 0.570 ac.
Onsite DA to EDW via YCB-1 = 5.539 ac.
Offsite DA to EDW bypassing YCB-1 = 0.000 ac.
Offsite DA to EDW via YCB-1 = 0.028 ac.
Total DA to EDW = 6.137 ac.
Impervious area to EDW = 5.180 ac (inc. 0.028 ac. offsite)
% imperviousness of 7.36 ac. project site = 70.0%
% imperviousness to EDW = 84.40%, SA/DA = 3.5272.
EDW surface area required = 0.2165 ac. (9,431 s.f.)
EDW surface area provided = 0.2204 ac. (9,599 s.f.)
Following are Responses to "Required Items Checklist" on the BMP Worksheet:
Control of 1" storm- Depth of 1" rainfall = 0.05 + (0.009 x 84.40 %) = 0.810 in r/o.
Required Min. Volume of 1" rainfall = 0.810 in x 6.137 ac. x 43,560 s.f. / 12" = 18,045 c.f.
Provided Water Quality Pool (WQP) Volume = 18,150 c.f.
Basin Length to Width Ratio- 4.34: 1 (Ave. Leng = 204 ft., Ave. Width = 47 ft.)
Basin Side Slopes- 3:1
Submerged and Vegetated Perimeter Shelf at Less tb rovided- N/A b/c EDW.
Vegetation to the Permanent Pool Specified- Yes. See elanting Plan.
Emergency Drain Provided- Yes. See Detail Plan for detail of 8" bottom drain.
Permanent Pool Depth Between 3' and 6'- Permanent pool depth at 3.0' for EDW.
Find attached a print out of the stage-area-volume relationship of the EDW design geometry. The
design stage-area-volume chart is included on the plan detail sheet. Note that the City of Durham
requires different depth regimes than the "NCDENR Stormwater Best Management Practices
Manual". The City's objective is to make the pond slightly shallower where the intermediate
depth regime (9"-18") is specified in the state BMP manual. The attached stage-area-volume
chart indicates the depth regime goals for both the City of Durham and NCDENR.
Temporary Pool Draw Down between 2 to 5 days- The temporary WQP draw down time =
approximately 3 days. See attached draw down worksheet.
Forebay Volume Approximately 20% of total Basin Volume- Volume provided = 23.8%. See
attached stage-area-storage worksheet.
Sediment Storage is Provided in the Permanent Pool- The Forebay and Micro-Pool are both
specified to be over excavated to elevation 253.00' to account for sediment storage. The
sediment storage volume is 1,119 c.f.
Access Provided for Maintenance- The basin facility is provided with adequate access to all
areas of the facility. See plans.
A Minimum 30' Vegetative Filter is Provided at Outlet- N/A b/c EDW. The outlet discharges
to a 65 l.f. grass channel before entering the culvert under Hwy. #55.
A Site Specific Operation and Maintenance (O&M) Agreement Plan Provided- A signed
and notorized O&M agreement is provided. See attached.
A Vegetative Management/Mowing Schedule is Provided in the O&M Plan- Yes.
Semi-Annual Inspections are Specified in the O&M Plan- Yes.
A Debris Check is Specified in O&M Plan to be Performed after Every Storm Event- Yes.
A Specific Sediment Clean-Out Benchmark is Listed (Elev. or Depth) in O&M Plan- Yes.
A Responsible Party is Designated in the O&M Plan- Yes.
Following is an itemized list of the Conditions of Permit and how we meet the objectives to
satisfy the final written storm water management plan:
1. Impacts Approved.
The proposed 539 linear feet of impact to the stream has not changed. The pipe size has been
revised to two 54" rcp culverts to satisfy the local stormwater 10-yr peak flow requirements.
2. Appropriate Sedimentation and Erosion Control Practices Must be Utilized.
A copy of the erosion control plan for phase one has been included. The plan meets or
exceeds the requirements of the state. The extended detention wetland (EDW) will serve as a
master sediment basin during phase one construction and will be cleaned out at the end of
phase one construction and vegetated and made operational. No permanent buildings will be
occupied before the EDW is made fully operational and the stormwater management plan is
implemented as approved by NCDWQ wetland unit.
3. All Temporary Sediment and Erosion Control Measures Placed in Wetlands or Waters
shall be Removed and Natural Grade Restored after the Division of Land Resources has
Released the Project.
No temporary measures are proposed to be placed in wetlands or waters. All sediment and
erosion control measures will be removed after the Durham County Sedimentation and
Erosion Control Department has inspected and approved the site at final inspection.
4. Measures will be Taken to Prevent Live or Fresh Concrete from Coming Into Contact
with Waters of the State until the Concrete has Hardened.
The plans specify that the culvert laying operation must begin during dry weather. During
dry weather there is normally no visible flow occurring in the stream being piped. The
culvert and headwall are both planned to be pre-cast. Depending on the availability of the
pre-cast headwalls at the time of construction, it may become necessary to cast the headwalls
in place.
5. Final Written Stormwater Mangement Plan Required before Permitted Impacts Occur.
See attached.
6. Upon Completion of this Project, the Applicant shall Complete and Return the "Permit
of Completion Form".
This requirement will be done.
7. Deed Notification shall be Placed on all Retained Jurisdictional Wetlands, Waters, and
Protective Buffers in order to Assure Compliance for Future Wetland, Water, and
Buffer Impacts.
A deed notification has been placed on the property and is on record at the Durham County
Register of Deeds. See attached recorded deed notification.
Sta a-stora a relationship for A I hin H # 55 ro'ect extended de tention wetland
ELEV. AREA AREA AREA INCR. VOL. INCR. VOL. ACCUM. VOL ACCUM. VOL ACCUM. VOL WQP VOL
FOREBAY POND TOTAL FOREBAY POND FOREBAY POND TOTAL TOTAL
ft a.s.l. s.f. s.f. s.f. c.f, c.f. c.f. C.f. c.f. c.f.
254.00 391 820 1211 0 0 0 0 0
255.00 556 1060 1616 474 940 474 940 1414
255.50 651 1190 1841 302 563 775 1503 2278
256.00 752 1325 2077 351 629 1126 2131 3257
256.25 806 1606 2412 195 366 1321 2498 3818
256.50 859 4911 5770 208 815 1529 3312 4841
256.75 916 5430 6346 222 1293 1751 4605 6356
257.00 971 8628 9599 236 1757 1987 6362 8349
257.50 10298 13323 4974
258.00 11036 18657 10308
258.50 11764 24357 16008
268.68 12044 26499 18150
259.00 12478 30423
260.00 14004 43664
Depth Re imes b City of Durham Requirements
POND POND FOREBAY FOREBAY % TOTAL
Goal Depth Area H yd. Depth Area H yd. Depth Pond Area
30%-40% 011-[phone] 30.14%
4o%-6o% 3" - 6" 3926 0.45 57 0.25 41.49°x6
1 o% - 2o% 18" - 36" 1190 2.76 651 2.69 19.18%
n/a 0"-3" 8 6"-18" 619 263 9.19% Note: depths between 0"-3" &
total 8628 971 100.00% 6"- 18" not a ccounted for by COD.
Depth Regimes b NCDWQ BMP Manual Requirements
POND % TOTAL
Goal Depth Area Pond Area
35% 0" - 9" 7397 77.06%
35% 9" - 18" 459 4.78%
5%.18" - 36" 1743 18.16%
total 9599 100.00%6
WETLAND DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
FOR 7.48 AC. PARCEL IN DURHAM CO. OWNED BY O.W. ALPHIN, JR.
DESCRIBED IN D.B. 3666, P. 481 IN THE DURHAM CO. REGISTER OF DEEDS
The wetland detention basin system is defined as the wetland detention basin and pretreatment including the
forebay.
Maintenance activities shall be performed as follows:
After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wetland detention basin system for sediment accumulation, erosion, trash accumulation,
vegetated cover, and general condition,
b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs
within 2 to 5 days as designed.
2. Repair eroded areas immediately, re-seed as necessary to maintain good vegetative cover, mow
vegetative cover to maintain a maximum height of six inches, and remove trash as needed. Refer to the
approved wetland planting plan for areas to be mowed. These areas are limited to the fescue grass
areas above elevation 260.0'.
3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to
maintain proper functioning.
4. Remove accumulated sediment from the wetland detention basin system semi-annually or when depth is
reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed
of in an appropriate manner and shall be handled in a manner that will not adversely impact water quality
(i.e. don't stockpile near the wetland detention basin or any stream, etc.). = ? >?-? ?uc:,4r+r?:'
UN ?u4? +
The measuring device used to determine the sediment elevation shall be such that it will give an
accurate depth reading and not readily penetrate into accumulated sediments.
If the elevation of the marsh areas exceed the permanent pool elevation, the sediment should be
removed to design levels. This shall be performed by removing the upper 6 inches of soil and stockpiling
it. Then the marsh area shall be excavated six inches below design elevations. Afterwards the stockpiled
soil should be spread over the marsh surface. The soil should not be stockpiled for more than two
weeks. Replant wetland plants as needed to maintain plant density per approved plans.
When the permanent pool depth reads Z, Z5 feet in the forebay and micro-pool, the sediment shall
be removed.
BASIN DIAGRAM
0 Permanent Pool Elevation Z?•C1
Sediment moval El. 75%
---------41--- Sediment Removal Elevation- S? - 75%
Bottom E vation o` 5% - --------------------------------- 75%
54• °
FOREBAY MAIN POND
Page 1 of 2
5. Wetland planting densities in the marsh areas should be maintained by replanting bare areas as needed.
Wetland plants should be encouraged to grow in the marsh areas.
6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment
through the emergency drain shall be minimized to the maximum extent practical.
7. All components of the wetland detention basin system shall be maintained in good working order.
I acknowledge and agree by my signature below that I am responsible for the performance of the seven
maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any
changes to the system or responsible party.
Print name: f7. 'W • P,? P? J
Title: nt.x
W
C-
-0 C?
Address: `+tc) 8•dX ????' so
Phone: q A r(P 3-L Q 721
Signature: W C?-
Date: t (0 (nom
Note: The legally responsible party should not be a homeowners association unless more than 50% of the
lots have been sold and a resident of the subdivision has been named the president. 1, -? , c d 6RA 4i its , a Notary Public for the State of
County of do hereby certify that G?• ??l??' H ?T
and acknowledge the
personally appeared before me this day of-Q,111
due execution of the forgoing wet [wetland] detention basin maintenance requirements. Witness my hand
and official seal,
o?"??l P Gq "?''••.
?• J??••.....•?? •
:' c?°TAAy
Q'•, 'OUB UG
c,
SEAL
My commission expires -/ - -,I '-? - -
Page 2 of 2
DRAWDOWN TIME FOR 2" ORIFICE (INVERT AT 257.00)
FOR ALPHIN HWY 66 RETAIL EXTENDED DETENTION WETLAND
STORM POOL VOLUME= 18,150 C.F.
STARTING STORM POOL ELEVATION= 258.68'
NORMAL POOL ELEVATION= 257.00'
TIME INTERVAL OF 10 MIN. POND POND POND
ELEV. AREA VOLUME
258.68 12,044 18,150
258.00 11,036 10,318
257.00 9,599 0
TIME
MIN FLOW RATE
CFS OUTFLOW
C.F. VOLUME
REMAINING WATER
ELEV. TIME
MIN FLOW RATE
CFS OUTFLOW
C.F. VOLUME
REMAINING WATER
ELEV. TIME
MIN FLOW RATE
CFS OUTFLOW
C.F. VOLUME
REMAINING WATER
ELEV.
0 18165 88
258 1460 0.090 53.98 8,370 257.81 2920 0.043 25.78 2561 257425
10 0
133 79
65 18
085 .
258
67 1470 0.090 53.78 81317 257.81 2930 0.043 25060 2,535 257.25
20 .
0
133 .
79
51 ,
18
006 .
258
67 1480 0.089 53.59 8,263 25710 2940 0.042 25.40 2,510 257.24
30 .
0
132 .
79
34 ,
17
928 .
258
68 1490 0.069 53.40 8,210 257.80 2950 00042 25.21 2,485 257.24
40 .
0
132 .
17
79 ,
847
17 .
258
65 1500 0.089 5320 8,156 257.79 2960 0.042 25.02 2,460 257.24
50 .
132
0 .
78
99 ,
768
17 .
65
258 1510 0.088 53.01 8,103 257.79 2970 0.041 2442 2,435, 257.24
60 .
131
0 .
78
82 ,
17
690 .
64
258 1520 0.088 5182 8,051 257.78 2980 0.041 24.63 2,410 257.23
70 .
131
0 .
78
65 ,
811
17 .
83
258 1530 0.088 52.62 7,998 257.78 2990 0.041 24.44 2,386 257.23
80 .
131
0 .
48
78 ,
17
532 .
63
258 1540 0.087 52.43 7,946 257.77 3000 0.040 24.24 2,362 257.23
90 .
D
131 .
78
30 ,
17
454 .
258
02 1550 0.087 52.24 7,893 257.77 3010 0.040 24.05 2,338 257.23
100 .
130
0 .
78
13 ,
376
17 .
61
258 1580 0.087 52.05 7,841 257.78 3020 0.040 23.88 2,314 257.22
110 .
130
0 .
77
96 ,
17
298 .
81
258 1570 0.088 51.95 7.789 257.75 3030 0.039 23.66 2,290 257.22
120 .
0
130 .
79
77 ,
17
220 .
258
60 1580 0.088 51.88 7,738 257.75 3040 0.039 23.47 2,267 257.22
130 .
129
0 .
77
61 ,
17
143 .
59
258 1590 0.088 51.47 7,688 257.74 3050 0.039 23.28 2,243 257.22
140 .
0
129 .
77
44 ,
17
005 .
258
59 1800 0.085 51.27 7,635 257.74 3080, 0.038 23.08 2,220 257.22
150 .
0
129 .
77
27 ,
16,988 .
258.58 1610 0.085 51,08 7,584 251,74 3070 0.038 22.89 2,197 257.21
100 .
128
0 .
77
09 16
911 258
57 1020 0.085 50.89 7,533 257.73 3080 0.038 22.70 2,175 257.21
170 .
128
0 .
78
92 ,
834
16 .
57
258 1630 0.084 50.70 7,482 257.73 3090 0.038 22.50 2,152 257.21
180 .
0
128 .
78
75 ,
757
16 .
58
258 1640 0.084 50.50 7,432 257.72 3100 0.037 22.31 2,130 257.21
190 .
0
128 .
76
58 ,
18
681 .
55
258 1650 0.084 50.31 7,382 257.72 3110 0.037 22.12 2,108 257.20
200 .
0
127 .
78
40 ,
16
804 .
55
258 1880 0.084 50.12 7,331 257.71 3120 0.037 21.92 2,086 257.20
210 .
127
0 .
76
23 ,
18
528 .
268.54 1670 0.083 49.92 7,282 257.71 3130 0.036 21.73 2,064 257.20
220 .
127
0 .
78
08 ,
18
452 258.53 1880 0.083 49.73 7,232 257.70 3140 0.036 21.54 2,042 257.20
230 .
0
126 .
75
89 ,
16
376 53
258 1890 0.063 49.54 7,182 257.70 3150 0.036 21.34 2,021 257.20
240 .
0
126 .
75
71 ,
16
300 .
25852 1700 0.082 49.35 7,13J 257.69 3180 0.035 21.15 2,000 257.19
250 .
128
0 .
75
54 ,
16
225 51
258 1710 0.082 49.15 7,084 257.69 3170 0.035 20.96 1,979 257.19
280 .
128
0 .
75
37 ,
16
149 .
51
258 .082 48.96 7,035 257.88 3180 0.035 20.76 1,958 257.19
270 .
0
125 .
75
20 ,
16
074 .
258
50 .081 48077 6,988 257.68 3190 0.034 20.57 1,938 257.19
280 .
125
0 .
02
75 ,
999
15 .
49
258 .081 48.57 8937 257.87 3200 0.034 20.38 1,917 257.18
290 .
0
125 .
74
85 ,
15
924 .
49
258 .081 48.38 6,989 257.67 3210 0.034 20.18 1,897 257.18
300 .
124
0 .
88
74 ,
15
850 .
258 .080 48.19 6,841 257.88 3220 0.033 19.99 1,877 257.18
310 .
124
0 .
74
50 ,
775
15 .
47
258 .080 47.99 6,793 257.66 3230 0.033 19.80 1,857 257.18
320 .
0
124 .
74
33 ,
15
701 .
258
4 .080
U 47.80 8,745 257.85 3240 0.033 19.60 257.18
330 .
0
124 .
74
16 ,
15
627 .
258.46 .078
O 47.81 6,897 257.85 3250 0.032 19.41 1,818 257.18
340 .
0
123 .
73
99 ,
15
553 45
258 .079 47.42 8,650 257.64 3260 0.032 19.22 1,799 257.17
350 .
123
0 .
81
73 ,
15
479 .
258.45 .079 47.22 6,803 257.84 3270 0.032 1902 1,780 257.17
360 .
123
0 .
73
64 ,
15
405 44
258 .078 47.03 6,558 257.84 3280 0.031 18.83 1,761 257.17
370 .
0
122 .
73
47 ,
332
15 .
258.44 .078 46.84 6,509 257.63 3290 0.031 18.64 1,743 257.17
380 .
0
122 .
73
30 ,
15
258 268.43 0.078 46.64 6,482 257.83 3300 0.031 18.44 1,724 257.17
390 .
122
0 .
73
12 ,
15
185 258
42 177 077 46.45 6,416 257.62 3310 0.530 18.25 1,708 257.17
400 .
122
0 .
72
95 ,
112
15 .
258.42 077 48.28 6,370 257.62 3320 0.030 18.05 1,688 257.16
410 .
0
121 .
72
78 ,
15
040 258.41 077 46.07 6,324 257.81 3330 0.030 17.88 1,670 257.16
420 .
121
0 .
72
60 ,
14
987 258.40 078 45.87 8,278 257.81 3340 0.029 17.87 1,652 257.18
430 .
121
0 .
43
72 ,
14
895 258.40 .078 45.68 6,232 257.60 3350 0.029 17.47 1,635 257.16
440 .
120
0 .
28
72 ,
14
822 258.39 .078 45.49 6,187 257.60 3380 0.029 17.28 1,818 257.18
450 .
0
120 .
72
09 ,
14
750 258.38 U
.075 45.29 6,141 257,60 3370 0.028 17.09 1,601 257.16
460 .
0
120 .
71
91 ,
678
14 258.38 .075 45.10 6,096 257.59 3380 0.028 10.89 1,584 257.15
470 .
120
0 .
71
74 ,
607
14 258.37 .073 44.91 6,051 257.59 3390 0.028 16.70 1,567 257.15
480 .
118
0 .
71
57 ,
14
535 258.37 .075 44.71 6,007 257.58 0.028 16.51 1,550 257.15
490 .
119
0 .
40
71 ,
14
464 258.38 .074 4452 5,962 257.58 0.027 16.31 1,534 257.15
500 .
0
110 .
71
22 ,
14
392 258.35 .074 44.33 5,918 257.57 0.027 16912 1,518 257.15

510
.
118
0
.
71
05
,
321
14
258.35
1970
0.074
44.14
5,874
257.57 P3
0.027
15.92
1,502
257.15
520 .
118
0 .
70
88 ,
14
250 258.34 1980 0.073 43.94 5,830 257.56 0.026 15.73 1,486 257414
630 .
0
118 .
71
70 ,
14
180 258.34 1990 0.073 43.75 5,788 257.66 0.026 15.54 1,471 257.14
540 9
118
0 .
70
53 ,
14
109 258633 2000 0.073 43.58 5,742 257.58 0.026 15.34 1,455 257.14
560 .
0
117 .
70
36 ,
14
039 258
32 2010 0.072 43.36 5,699 257.55 3470 0.025 15.15 1,440 257.14
560 .
117
0 .
70
19 ,
13
W9 9
268.32 2020 0.072 43.17 5,658 257.55 3480 , 0.025 14.96 1,425 257.14
570 .
0.117 .
70901 ,
13,899 258.31 2030 0.072 42.98 5,613 257.54 3490 0.025 14.76 1,411 257.14
580 0
118 69
84 829
13 258630 2040 0.071 42.78 5,570 257.54 3500 0.024 14.57 1,396 257.14
590 .
0
116 .
69
61 ,
13
759 258630 2050 0.071 42.59 5,527 257.54 3510 0.024 14.37 1,382 257.13
600 .
118
0 .
80
50 ,
13
690 258,29 2060 0.071 42.40 5,485 257.53 3520 0.024 14.18 1,367 257.13
610 .
118
0 .
8922 ,
820
13 258.29 2070 0.070 42.21 5,443 257.53 3530 01023 13.99 1,353 257.13
820 .
0
115 69
15 ,
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551 258628 2080 0.070 42.01 51401 257.52 3540 04023 13.79 1,340 713
2
830 .
115
0 9
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68.29 ,
208 25750
680 0.114 68.11 13,140 258.25
690 0.113 67.94 13,072 258.24
700 0.113 6777 13,004 258.23
710 0.113 87.80 12,937 258.23
720 0.112 67.42 12.889 258.22
730 0.112 67.25 12,802 258.22
740 0.112 67.08 12,735 258.21
750 0.112 86.91 12,888 258.20
780 0.117 88.73 12,801 258.20
770 0.111 68.58 12,535 258.19
780 0.111 66.39 12,458 258.19
790 0.110 66.21 12,402 298.18
800 0.110 88.04 12,338 258.18
810 00110 65.87 72,270 258.17
820 0.109 65.70 12,204 258.16
830 0.109 65.52 12,139 258.16
840 0.109 65.35 72,073 258.15
850 0.108 65.18 12,008 256.15
860 0.108 65.01 11,943 258.14
870 0.108 84.83 11,878 258.14
880 0.108 64.68 11,814 258.13
890 0.107 64.49 11,749
900 0.107 64.31 11,685
910 0,107 64.14 11,821
920 0.107 63.97 11,557 fl
930 0.108 63.80 11,493
940 0-108 8362 11,429
950 0.108 83.45 11,366

960
0.105
63.28
11,3
03 .09
970 0.105 63.11 11,240 258.08
980 0.105 62.93 11,177 258.07
990 0.105 62.76 11,114 258.07
1000 0.104 82.59 11,051 258.06
7010 0.104 62.41 10,989 258.06
1020 0.104 62.24 10,927 258.05
1030 0.103 82.07 10,865 258.05
1040 0.103 61.90 10,803 258.04
1050 0.103 81.72 10,741 258.04
1080 0.103 81.55 10,878 258.03
1070 0.102 61.38 10,618 258.03
1080 0.102 61.21 10,557 258.02
1080 0.102 61.03 10,495 258.02
1100 0.101 60.86 10,435 258.01
1110 0.101 60.89 10,374 258.00
1120 0.101 60.51 10,314 258.00
1130 0.101 60.34 10,253 257.99
1140 0.100 60.15 10,193 257.99
1150 OJ00 59.95 10,133 257.88
1160 0.100 59.76 10,074 257.98
1170 0.099 59.57 10,014 257.97
1180 0.099 59.38 9,955 , 257.96
1190 0.099 58.18 9,895 257.98
1200 0.098 58.99 8,838 257.95
1210 0.098 58.80 9,778 257.95
1710 0.098 58.60 9,719 257.94
1230 0.087 58.41 9,661 257.94
1240 0.097 58.22 9,802 257.93
1250 0.097 58.03 9,544 257.93
1260 0.098 57.83 9,487 257.92
1270 0.098 57.84 9,429 257.91
1280 0.098 57.45 9,371 257.91
1290 0.095 57.25 9.314 257.90
1300 0.095 57.06 9,257 257.90
1310 0.095 58.87 9,200 257.89
1320 0.094 58.68 9,144 257.89
1330 0.094 58.48 91087 257.88
1340 0.094 56.29 9,031 257.88
1350 0.093 58.10 8,975 257.87
1360 0.093 55.90 8,919 257.88
1370 0.093 55.71 8,883 25788
1380 0.093 55.52 8,808 257.85
1390 0.092 5513 8,752 257.85
1400 0.092 55.13 8,697 257+54
1410 0.092 54.94 8.642 257.84
1420 0.091 54.75 8,587 257.83
1430 0.081 54.55 81533 257,83
1440 0.091 54.38 8,478 257.82
1450 0.090 54.17 8,424 257.82
3600 0.021 12.63 - 1,281 257,12
3610 0.021 12.43 1,249 257.12
3620 0.020 12.24 1,238 257.12
3830 0.020 12.05 1,224 257.12
3640 0.020 11.85 1,212 257612
3650 0.019 11.88 1,201 257.12
3680 0.019 11646 1,189 257.12
3670 06019 11.27 1,178 257.11
3660 0.018 11.08 1,187 257.11
3890 0.018 10.88 1,156 257.11
3700 0.018 10.89 1,145 257.11
3710 0.017 10.49 1,135 257.11
3720 0.017 10.30 1,125 257.11
3730 0.017 10.10 1,114 257.11
3740 06017 9.91 1,105 257.11
3750 0.016 9.72 1,095 257.11
3780 06016 9.52 1,085 257.11
3770 0.016 9.33 1,078 257.10
3780 0.015 9.13 1,067 257.10
3790 0.015 8.94 1,058 257.10
3800 0.015 8.74 1,049 257.10
3810 0.014 8.55 1,041 257.10
3820 0014 8.35 1,032 257.10
7- DN`VS
2004065722
FOR REGISTRATION REGISTER OF DEEDS
Willie L- Covington
DURHAM COUNTY. NC
2004 DEC 22 01:08:41 PM
BK : 4650 PG : 886-888 FEE : $17.00
2004
COMPLIANCE WITH WETLAND & BUFFER REGULATIONS
In accordance with Title 15 A NCAC 2H .0500, the following DEED NOTIFICATION
shall be recorded in the Durham County Registry prior to the conveyance of lots. Said
Deed Notification shall apply to the 7.36 ± ac. parcel known by the following parcel
identification PIN 0738-03-01-8050 in Durham County, North Carolina as shown on
plans titled "Survey for U.W. Alphin, Jr." prepared by S.D. Puckett & Associates, Inc.
dated: December 1, 2003.
"A portion of this lot has been determined to meet the requirements for
designation as a stream wetland as described by the attached survey plan. Any
subsequent fill or alteration of this area shall conform to the requirements of the state
rules adopted by the State of North Carolina in force at the time of the proposed
alteration. The intent of this provision is to prevent additional wetland, stream or buffer
filling or draining, so the property owner should not assume that a future application for
filling or draining would be approved. The property owner shall report the name of the
subdivision in any application pertaining to said rules. This covenant is intended to
ensure continued compliance with all rules adopted by the State of North Carolina and
therefore the State of North Carolina may enforce benefits. This covenant is to run with
the land and shall be binding. on all Parties and all persons claiming under them".
yignature
(1) A-t A-t ;
Owner's name: O.W. Alphin, Jr.
Address: 1910 Sedwick Rd., Suite 200 A
City, State, Zip Code: Durham, N.C., 27713
Phone Number: [phone]
STATE OF North Carolina
DURHAM COUNTY
a Notary Public of the State of North
n> ?J ?,t.,; i y F
Carolina, County, hereby certify that owneif6rsonally
appeared before me this day and executed by above certification.
Wit ss my hand and notorial seal, this j* day of t L ?.'??t c ,ems "200f Notary Public `` ?•? • '
My commission expires: ?i v = 1
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1w I-181 I'rolessiOnul land ulve'YOrs
fli 4;
••,? ?,h? n I, I'u? F,ri( tv'_( _1' I," ll)118:1
.?,?.i? Lrllenhu, krllsn: n 1", 0111
)III % ov 1(ll':
O. W. AIphin, jr.
O ? o SurveyPLI 11V Dra,vn h)' Sun-r?' D'Iw: (? Cc RIOl Dole:
Cnunlx' Or MIRIIAN1 n(vn51)il• 1)I IT.i;ANC;LI 51,11(' (,I ;v-(_ I do:
Jul 19 04 09:15a Ken Wrenn
Wrenn Engineering Company
919 806 5083
?(,lt
FAX Cover Sheet
Date: 7/1912004
To: NCDWQ Wetlands Unit
Attn: John Domy _
p.1
Ulf- 0 US-
# Pages: 2 (including this sheet)
Project: Aiphirt Hwy 55
Comments:
John
Please find attached an image of the letter and payment check sent to the Herald Sun on July 19,
200- for the above referenced project Please let me know if there is anything else we need to do
-
to expedite the issuance of the permit. Thank you,
Thanks.
Copies To,
From: Kenneth B.Wrenn. P.E.
office: 1910 Sedwick Rd., Suite 200-C, Durham, N.C.
phone: [phone]
fax: [phone]
email:
JUL-19-2004 MON 07:56 TEL:[phone] NAME:DWO-WETLANDS P. 1
Jul 19 04 09:16a Ken Wrenn 919 806 5083 P.1
Wrenn
Engineering
Company
The Herald Sun
2828 Pickett Rd.
P.O. Box 2092
Durham, N.C. 27702
1910 Scdwick Rd., Suite 200-C
Durham- N. C. 27713
Voice 919.806.5082
FAX [phone]
ken.mTetm(uizon.net
7-19-04
Re: Advertising payment for "Alphin / North Carolina Division of Water Quality"
Classified Legal Section
Accounts Receivable,
Please find enclosed a copy of the above referenced invoicing statement we received for the
referenced account and a check in the amount of $8625 that is payment in full for the advertising
services. "Thank you.
Sincerely,
Kenneth B. Wrenn. P.E.
President
cc. John Domy, NCDWQ
Wendell Alphin; Owmer
WRENN ENGINEERING COMPANY 1142
1910 Sedwick Rd, Suite 200C
Durham, NC 27713
919-806-5082 (? ee 95ersay
- -

I ,ry to the
rrc4vuF WMCH 8)859
Uric
C7b•L?
??: ? 61 _ ZS? Dollar
'
,.
s L
1 ?.a
WACHOVIA
WachcMa Beak, NA
AQi R!T 053109580
For Qfb?, .?thta ?a ?Trsaa'"

1:0 S 3 L0B 5801: 20000 L 7 400 6 2011• L0.2
JUL-19-2004 MON 07:57 TEL:[phone] NAME:DWO-WETLANDS P. 1
?0F WA TFRp Michael F. Easley, Governor
William G. Ross Jr., Secretary
O G North Carolina Department of Environment and Natural Resources
j r Alan W. Klimek, P. E. Director
Division of Water Quality
o ?
Coleen H. Sullins, Deputy Director
Division of Water Quality
July 7, 2004
DWQ Project # 04-0885
Durham County
Page 1 of 1
Mr. Oliver W. Alphin, Jr.
190 Sedwick Road
Suite 200A
Durham, NC 27713
Subject Property: Aphin property at NC 55 and CSX Railroad near I-40
Re: Payment of Invoice for Public Notice
Dear Mr. Alphin:
Attached herein is an invoice received from the Herald-Sun of Durham, N.C. requesting payment
in the amount of $86.25for legal advertising. The newspaper published a Public Notice for an
application for an Isolated Wetlands Permit for the proposed commercial development on june
14, 2004.
Please note that in accordance with 15A NCAC 2H .1303(1), an applicant for an Isolated
Wetlands Rules Permit shall pay to the department the costs of advertising public notices
required by 15A NCAC 2H .1303 of the Isolated Wetland Rules. Please remit payment in the
amount of $86.25 to the Herald-Sun at your earliest convenience and provide a copy of your
letter and check to the DWQ.
Thank you for your attention. Please contact me at 733-1786 if you have any questions.
r n Dorney
S pervisor, 401 Wate Quality Certification Program
JRDljrd
cc: File copy
Kenneth Wrenn; Wrenn Engineering. 1910 Sedgewick Road, Suite 200-C, Durham, NC
27713
Central files
Filename: 0408 85Aplhin(Durham)Paymentlsolated
N. C. Division of Water Quality, 401 Wetlands Certification Unit,
1650 Mail Service Center, Raleigh, NC 27699-1650 (Mailing Address)
2321 Crabtree Blvd., Raleigh, NC 27604-2260 (Location)
[phone] (phone), 919-733-6893 (fax), (hftp://h2o.enr.state.nc.us/ncwetlands)
Customer Service #: 1-877-623-6748
(T4c,*cratb+$uu
P.O. Box 2092
Durham, N.C. 27702-2092
Tel: [phone]
Fed ID#: 560207740
www.heraidsun.com
1 1 6/30/04
1777742159
1777742159
6/1/04 - 6/30/04 C DIV OF WATER QUALITY
TOTAL AMOUNT DUE 'UNAPPLIED AMOUNT 3 TERMS OF PAYMENT
86.25 0.00 DUE UPON RECEIPT
NT DUE 22 30 DAYS 60 DAYS OVER 90 DAYS
86.25 0.00 0.00 0.00
N C DIV OF WATER QUALITY
WATER QUALITY SECTION
1650 MAIL SERVICE CENTER
ATTN: JOHN DORNEY
RALEIGH, NC 27699-1650
THE HERALD-SUN
2828 PICKETT ROAD
P O BOX 2092
DURHAM, NC 27702
ADVERTISING NOTICE
NVOICES 30 DAYS PAST DUE ARE SUBJECT TO 1.5%
SERVICE CHARGE PER MONTH-ANNUAL RATE 18%
THERE WILL BE A RETURN CHECK FEE OF $25.00

--------------------------------------------------------------------------------------------------------------------------------- -------------------
PLEASE DETACH AND RETURN UPPER PORTION WITH YOUR REMITTANCE
0 DATE 11 NEWSPAPER REFERENCE 121131141 DESCRIPTION-OTHER COMMENTS/CHARGES 15 SAU SIZE
16 BILLED UNITS 17 TIMESRATERUN
18 19 GROSS AMOUNT 20 NET AMOUNT
6/14 0011183071 ALPHIN/ NORTH CAROLINA DIVISION OF 1.00 x 69 Li 1 86.25
HE 3999-Legals Class Legals 69.00 1.25
PLEASE PAY: $86.25
THANK YOU FOR CHOOSING THE HERAL D-SUN NEW PAPERS
OUR CUSTOMER SERVICE LI NES ARE:
Advertising 919-419-67 @0
Billing 919-419-6850
Tearsheets 919-419-6589 Line ad tears eets 919-41 -6910
WE DS/401 ROU
P
UL 0720 4
W'TE QUALITyS ,r; G
iTA T EMENT OF ACCOUN 1 AGING OF PAST DUE AMOUNTS SaITM
CURRENT NET AMOUNT DUE 22 30 DAYS 60 DAYS OVER 90 DAYS 'UNAPPLIED AMOUNT TAL AMOUNT DUE
L
86.25 0.00 0.00 0.00 0.00 86.25
T
rfi p?rp?Rr P.O. Box 2092, Durham, NC 27702-2092
e ?17µ?ia??utt Tel: [phone] Fed ID#: 560207740
www.heraldsun.com 'UNAPPLIED AMOUNTS ARE INCLUDED IN TOTAL AMOUNT DU
INVOICE# 25 ADVERTISE R INFORMATION
1 BILLING PERIOD 6 BILLED ACCOUNT NUMBER 7 ADVERTISERICLIENT NUMBER 2 ADVERTISER/CLIENT NAME
1777742159-6 /04 6/1/04 - 6/30/04 1 1777742159 1777742159 N C DIV OF WATE
(t4c*cralb*$un
N C DIV OF WATER QUALITY LEGAL ADVERTISING INVOICE
WATER QUALITY SECTION
1650 MAIL SERVICE CENTER Account Number: 1777742159
ATTN: JOHN DORNEY
RALEIGH NC 276991650 Invoice Date: 6/14/2004
ORDER NUMBER INVOICE DATE DESCRIPTION LINES
I
TIMES
TOTAL
CHARGES
0011183071 6/14/2004 NORTH CAROLINA DIVISION OF WATER Q 1.00 x 69 Li 1
6/14/2004 86.25
DATES APPEARED
P.O. Box 2092, Durham, NC 27702 www.heraidsun.com 2828 Pickett Road, Durham, NC 27705
NORTH, CAROLINA
DIVISION OF.
WATER QUALITY
PUBLIC NOTICE is here-

AFFIDAVIT OF PUBLICATION b Iv at W.
Alphine 1r.has Iappli d
to the North Carolina DI-
vision of Water Quality
for an Individual Isolat-
ed Wetland end Waters
Permit pursuant to the
Environmental Manega-
'
ment
Commission rules
In 15A NCAO 2(-I .1300.
The pproposal is to fill
539 linear feet of Inter-
mittent, Isolated
streams on a property

State of North Carolina located at NO 55 and
the CSx railroad, line
1-40
of
south
and NO
County of Durham
y 54
In
Durham
m C6unty.
Th
e s
that a Icomme cial de-
velopment Is planned
Minor being duly sworn says that she is the Principal Clerk of
Donna B Sfor tormw eer ,is papro-
.
The Durham Herald Co., Inc., publishers of The Herald-Sun a posed tr be treated nd
constructed wetland !
designed to meet DWQ,
a newspaper published in and of general circulation in design standards be-
foredischar
e i
t
t
ib

said County, and that a notice of which the annexed is a true copy, g
n
o
r
u-
Creek of Northea and eventual)
was published in said newspaper one time on the 14th day of June, 2004. Jordan Lake: Other
streams on the Site will
be left undisturbed and
protected.
The public is Invited to
comment on the above-
mentioned application
to the Division of Water
Quality. Comments
shall be I
iti
n wr
ng and
shall be receive by the
/
' Division no later than
LV . Comments
ly 16, 2004. Comments
should be sent to the

Principal Clerk N.C. Division of Water
Quality, Non-Discharge
B
h
ranc
, 2321, Crabtree
Boulevard, Raleigh, NO
27604, , Attn: , John
to and subscribed before me this 14th day of June, 2004.
Sworn Domey (919-733-9848;
'
Fax: [phone]): A
copy of the application
Is on file at the Division
office at 3800 Barrett
Drive, Raleigh, North
Carolina 27609 (Raleigh
Regional Office during
normal business hours
and may be inspected
by the public.
Alen Klimek,
P.E., Director
N.O. Division of
b1
N Water Qua jZ
1C
o ary u
H-S: June 14,
2004
My commission expires December 16, 2006.
Durham County, North Carolina
`1?1111M1 ll?s'
dry • ••'0"
AM CO ?????`
`p 0? wAT ?qpG
r
Q Y
micnaet r. nastey, vovernor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan Klimek, P.E., Director
Division of Water Quality
Coleen H. Sullins, Deputy Director
Division of Water Quality
June 4, 2004
Durham Herald-Sun
Legal Ad Department
P.O. Box 2092
Durham, NC 27702
Attn:_Ie,gal-Ad Department
Dear Sir or Madam:
Re: Public Notices
Please publish the attached Public Notice one time in the sections set aside for Legal Advertisements in
your newspaper. The publication should run on or before June 14, 2004. Please send the invoice for the
publications and three copies of the affidavit of publication to the address given below. Payment cannot be
processed without the affidavit of publication.
N.C. Division of Water Quality
Attn: John Dorney
Water Quality Section
2321 Crabtree Boulevard
Raleigh, NC 27604
If you have any questions, please telephone me at 919-733-9646.
Program
JRD/bs
cc: Raleigh Field Office US Army Corps of Engineers
Raleigh Regional DWQ Office
Central Files
File Copy
Kenneth Wrenn; Wrenn Engineering, 1910 Sedwick Road, Suite 200-C, Durham, NC 27713

N. C. Division of Water Quality, 401 Wetlands Certification Unit,
1650 Mail Service Center, Raleigh, NC 27699-1650 (Mailing Address)
2321 Crabtree Blvd., Raleigh, NC 27604-2260 (Location)
[phone] (phone), 919-733-6893 (fax), (http://h2o.enr.state.nc.us/ncwetlands
NORTH CAROLINA DIVISION OF WATER QUALITY
PUBLIC NOTICE is hereby given that Oliver W. Alphin, Jr. has applied to the North Carolina Division of
Water Quality for an Individual Isolated Wetland and Waters Permit pursuant the Environmental Management
Commission rules in 15A NCAC 2H .1300. The proposal is to fill 539 linear feet of intermittent, isolated
streams on a property located at NC 55 and the CSX railroad line south of I-40 and NC 54 in Durham County.
The site plans show that a commercial development is planned for the parcel. Stormwater is proposed to be
treated by a constructed wetland designed to meet DWQ design standards before discharge into tributaries of
Northeast Creek and eventually Jordan Lake. Other streams on the site will be left undisturbed and protected.
The public is invited to comment on the above-mentioned application to the Division of Water Quality.
Comments shall be in writing and shall be received by the Division no later than July 16, 2004. Comments
should be sent to the N.C. Division of Water Quality, Non-Discharge Branch, 2321 Crabtree Boulevard,
Raleigh, NC 27604, Attn: John Dorney (919-733-9646 Fax: [phone]). A copy of the application is on file
at the Division office at 3800 Barrett Drive, Raleigh, North Carolina 27609 (Raleigh Regional Office during
normal business hours and may be inspected by the public.
Alan W. Klimek, P.E., Director
N.C. Division of Water Quality
DATE: June 4, 2004
Triage Check List
Date. ?L ??60_ 4?& Project Name. "40 111'o17
DWQ#:
County: N?? 0?----
To: ? ARO Mike Parker ? WaRO Tom Steffens
? FRO Ken Averitte ? WiRO Noelle Lutheran
? MRO Alan Johnson ? WSRO Daryl Lamb
RRO Steve Mitchell
From: Telephone : [phone]
The file attached is being forwarded to your for your evaluation.
Please call if you need assistance.
? Stream length impacted
? Stream determination
? Wetland determination and distance to blue-line surface waters on USFW topo maps
? Minimization/avoidance issues
? Buffer Rules (Meuse, Tar-Pamlico, Catawba, Randleman)
? Pond fill
? Mitigation Ratios
? Ditching
? Are the stream and or wetland mitigation sites available and viable?
? Check drawings for accuracy
? Is the application consistent with pre-application meetings?
? Cumulative impact concern
Comments: IlY12 qq CL A
2WO 621 e_
")JA
o? OF WA rF9 pG
r
7 ?
O 'C
May 24, 2004
Mr. Kenneth Wrenn
Wrenn Engineering Company
1910 Sedwick Road
Suite 200-C
Durham, NC 27713
RE: Site visit to Alphin Property - Durham, NC
DW Q # 044)&4 019'95'
Durham County
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P. E. Director
Division of Water Quality
Coleen H. Sullins, Deputy Director
Division of Water Quality
This letter summarizes our site visit on May 21 st with you and Mr. Alphin to discuss
permitting issues regarding your client's plans for future commercial development on this site at
NC 55 near NC 54. As we discussed, based on the US Army Corps of Engineers determination
regarding the channel through the center of the site, the Division of Water Quality believes that
this channel is an isolated streams and thereby subject to permitting according to 15A NCAC 2H
.1300. As we discussed in the field, an Individual Isolated Stream Permit issued by the Division
of Water Quality will be needed following your application, payment of the required fee of $475
and the required Public Notice that the Division must publish. This Public Notice must remain
open for public comment for a month after the publication date - therefore, the Division will be
unable to provide final approval until that time.
Based on our site visit and pending the public comment, the Division believes that a
Permit can be issued for this site as long as the on-site stormwater plan (constructed wetland) is
designed to meet DWQ's design standards for that Best Management Practice. We believe that
compensatory mitigation will not be required for this impact since the stream is intermittent.
Please call me at 733-9646 if you have any questions.
5 cerely urs,
rnalOffice
Cc: Steve Mitchell, DWQ Raleigh R Todd Tugwell, Raleigh Field Office US Army Corps of Engineers
File copy
Central files
N. C. Division of Water Quality 1617 Mail Service Center Raleigh, North Carolina 27699-1617 [phone]
Customer Service
1-877-623-6748

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Joins Map 122 y NC GRID 2,030,04 78°52'30' 57

Wrenn
Engineering
Company
N.C. Division of Water Quality
Attn: John Dorny
2321 Crabtree Blvd.
Raleigh, N.C.
27604-2260
1910 Sedwick Rd., Suite 200-C
Durham, N.C. 27713
Voice 919.806.5082
FAX [phone]
k .wrenn veriwn.net
Re: Alphin Property, Durham, N.C. (East Side Hwy. #55) Cape Fear Basin.
John,
4-2-04
WETLANDS 1401 GROUP
APR 0 2 2004
WATER QUALtTySECTj pN
I spoke with you briefly this morning concerning the above referenced project located in
southern Durham County. We are proposing to pipe a stream that shows up as intermittent on
both the usgs quad and usda soils maps. We met with Todd Tugwell of the USACE on 9/25/03 to
make a determination of existence of jurisdictional streams on the above referenced property.
The determination was made that a portion of the stream is not Corps juridictional. The point
Todd determined where jurisdiction begins was flagged by him in the stream and it was surveyed
to positively identify the beginning point of Corps jurisdiction. Todd Tuggwell spoke with Todd
St. John on 10/10/03 and communicated to Mr. St. John the field determination. Todd Tugwell
signed off on the plat 12/16/03 describing the stream determination. I have attached 2 copies of
the signed plat for your review.
On 3/30/04 Steve Mitchell made a site visit and communicated to me that he found evidence
of crayfish in an undetermined location of the stream and suggested the stream has perinneal
characteristics and that mitigation would likely be required in order to pipe the stream.
We need NCDWQ to provide us with direction as to how to proceed in our efforts to pipe a
portion of the stream. We would like to meet with you to discuss the request once you have a
chance to familiarize yourself with the situation. The reason we want to do this is to have a clear
understanding of the state's requirements and objectives and to look over the proposed
development and discuss the issues. Having met with you to discuss the objectives, we can
provide you with a PCN application that addresses the requirements from the meeting.
Find attached also a copy of the USGS map and SCS soils map of the subject property, a
1 "=100' scaled drawing of the proposed site plan under review at the city of Durham, and a copy
of the Corps plat signed off by Todd Tugwell. The site plan involves piping 540 I.f. of the non-
jurisdictional portion of the north south flowing stream and grading the site for future
development as commercial use that is in the planning stage right now. After speaking to you
several months ago, I incorporated an extended detention wetland into the southwest corner to
collect all the site generated runoff from the development. We look forward to talking to you.
Please call if you have any questions or need additional information.
Sincerely,
K h B. renn,
President
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File:
A
¦ Complete items 1, 2, and 3. Also complete
Item 4 If Restricted Delivery is desired.
¦ Print your name and address on the reverse
so that we can return the card to you.
¦ Attach this card to the back of the mallpiece,
or on the front if space permits.
Article Addressed to:
Mr. Oliver Alphin, Jr.
1910 Sedwick Road, Suite 200A
Durham, NC 27713
DWQ# 04-0885 - Durham
A.
? Agent
0. Date of
D. Is delivery address different from Item 17 ? Yes
If YES, enter delivery address below: ? No
3. Service Type
Certifled Mall ? Express Mail
Registered 10 Return Receipt for Merchandis
? Insured Mail C.O.D.
4. Restricted Delivery? (Extra Fee) ? Yes
t. Article Number 7004 1160 0002 2706 7421
(Aansfer from service labeo
?c r.,- -gA11 onnA ,fl7G.G1Yf_.AA
UNITED STATES POSTAL SERVICE
• Sender: Please print your name, address, and
NC DENR Division of Water Quality
401 Oversight/Express Unit
2321 Crabtree Boulevard, Suite 250
Raleigh, NC 27604
First-Class Mail
Postage & Fees Paid
LISPS
4 in this, bqx •
Oz I??I?11???I?II??IIr??.I.?1??1?I?? I I III I I?III ?fit I III?????II?I
2-54" RCP CULVERTS INLET.
MITERED HEADWALL ELEV. 260.00'
HEADWALL & 16' X 8' RIP-RAP MAT d50=9", d= 23", LINE W/FABRIC.
i~ I i f ti nP I I d i i ~ ~ i 'i ~ ~ z
f f. ~ , c ' r'` s I f . I ' I ~ , - ' ' 'I I i , j CITY OF DURHAM IMPOSED 100' ~ ~ 'r "
i ~f r I' ~ I .STREAM BUFFER HIGH DENSITY i ' ~
I 'f r •I i f I I , i 'S ~ ! f 11 f I: I I y I ;DEVELOPMENT >24% & <70% 1 l:
I f r ~ PROJ f ~ ECT ~ , ' • ~ > > 12" RCP STORM DRAIN ; f r ~ ~ I ~ CITY OF DURHAM IMPOSE 50 ! f ' ' I~ II IMPERVIOUSNESS ~ ' . i ; ~
INLET PLANNED BY NCDOT. I ! f _ _ ~ q ' r f r ~ ~ , • ~ ~ STREAM BUFFER (LOW D,1=NSITY (f r ' ~ , i I , ` 1 ASS TW FSITE DRAINAGE '
I i + 41 E 687..55' . ` 1" • DEVELOR ENT <24% 3' i ; ; ' _ T ESA _ y VEGt7AT10 ~ ' ~ M I I f f ~ ; ~ ~ ~ 11 f ; , i VEGETAT{ON ~ ( ~ I .'6'1'41 "E AR * BE DIVERTED FF~OM 1
' N `fMPERVIOU$NESS) f I ! , fi0 REMAIN ~ ^ AREA "C DIVERSION TO REMAI ~ N 'f r i I I' ! ' ' I _ 7` . , , AI NG'TO EXTENDED' I ~ ~ z` I { ~ tiNERS~' D~ ~ TION WETLAND. ' W~ehn Eng~~eeflhg Ff ~ N
~ f i 0 u, Z ~ I I 1 , , ~ I f ~ ~ I l_ ~ :j ~ ~ , , I I I ~ ~ t~ ~ I~ ~ 8,400 ~.F. •t ~ ~ Civil Engineering
f ' I 'tREESAVE .I r a ~ ~ y N ~t i f f , I f ARF~0."A ~ ~ 5: V`` ;NEG ' BOUNDA If ` ! j I BUTLDI,NG A Land Planning
f { . E'fATION . Y i I A ~ TO REM ~ 1 , ,,4 M ~ > ~ ~ AIN:' 'f r I W fFE 264 50 ~ VEGETATION i N N - I j PARKI LGT ~ ~ ~ TO ~ REMAI ~ Ste Design
I f:. i I 2 1 ~ ~3 o vi 3;1 SLOPES \ ' f I J ~ ' d A - i f f' sf I ;
'f ~ r f:•: ~ ~ i, ~ ~ i I ' f ~ 8 ~ (TYP.) FLEY ' 266:5' ; I I I j , r ; i ~+f ~ ~ f • :~i I ~ ~ ~ ~ I + I , ,.`~UlLDI1V~ i ~ ' ~ WRENN ENGINEERING CO.
- , ' PHASE 1 OFFSITE r FFE ~ ~ I I 2 i y, ~ ~ 3 W ~ FFE ~ 2saa', - ' CHANNEL"E" (GRA V-SHAPE) DRAINAGE AREA TO rI I 1= U" i( O 263.0 t ~ ~ ~ ~ fFE 2~/~~afl ,,t l R ' ~ qq r ~ 1910 SEDWICK D. I
, ' ~ ~ ~ EXTENDED DETENTION ) . , 1.59b SLOPE. S.S,- •1, D- 6".. ' II' i f f ~ g _M,,. _ , HANNE"a,. ~ I 1 PARKING LOT ~ ~ ~ N~ 1 SUITE 200-C ~ i i ~ PARKING,'LOT z ~ DURHAM, NC 27713
'B w r - - ~ Ham PHASE 1 OFFSITE ~ ~ i + LAN VIA Y 1 ~ ; , . ; DEPI`H- 9" _ - ,t, r t:: (0.210 AC.) SHADED BLUE f ~ r ; o ~ ~ ~ 919 806-5082 _ . i Q (
' - , DRAINAGE AREA TO , 7 RAVEL O~IVEWAY , ~ ~ Q~ r~ ~ , - 0 ~k~1 r v \ f, f ~i EXTENDED DETENTION f N i ~ ' W 1 -5083 fax ~ ~ 4 ~ , (9 9) 806 M 1 f : t I ~ ' ~ _ t ; , KEN.WRENN~VERIZON.NFr
} I f ruvtt-, I ~ WETLAND AND BYPASSING i f GRAVEL. f_,. ~ m- " " PIPING OF INTERMITT ~ f ~ ENT S ~ - - r I ,r ~ { r '1 ,k~ # ~
YCB-1 0.013 AC. CHANNEL 1, _i ~ + ~ ~°I° ~ ~ ~ ( ) f ~ AND REMOVAE OF STREAM,-BUFFER..- ' I SHADED BLUE. f ' ~ DEPTH- 6t 1 ' ~ DRNE ~ r - ACCESS i r _ ;
' ~ v_: , I, ( ~ 438 L'F. OF 2 54f' CLgSS III ;RCp , f f i a ~ ROCK CHECK~.D i ~ - ,F ,r CULVERTS AT 0.91,3x. ,CULVE~T " ~ : r'r~ ~ ~ PHASE 2 OFFSITE I t ' ~ y ~ ~ r' . ~I I ~ ~ ` ~ ~ i
j r SEE DETAIL ~ I + ~ BACKFlLL TD BE STRUCTURAL ~ ( DRAINAGE AREA DRAINS r ,f i' ~ CONTROLLED FILL!TO 1 ' EITH R ! TO EXTENDED DETENTION ~ ~ i _ ~ f ~ 2
f CHANNEL "F" (T P.} r I OF CULVERI~ CENT~RLINE~ ~ ' • S ~ ~ ' f I f ' 1,0~ SLOPE, ss, 3s~, ~ ~ . RAINAG`E AR DIVIDING • . WETLAND VIA 1' ~ , ~ - ~ ~ , PARItING LO
I . ~P r~ STR FFER rIS REMOVED;' f f f j f ~ + I W- DEPTH VA IE~",- _ ~ ~ , r ~ ~ ; FOREBAY(0.028 AC.) f +I ! i" , ' ` ~ m - _ ~ •
i r LINE (BLUE UbIE , ~ ~ SHADED BLUE. I w. , w. 'F ~ w~ i..:. iQ' ~ ; ' PARKING LOT t`~, { _ o ~ ~ ~Bb, 4r ~ j ~i E 1' 0 Z+i ~
` ~ PHASE ~ 1 ONSI DRAINAGE AREA HANNEL ' !f fl 4,; DEPTH- 12" ~ ~ ~ ~ • O! PROJECT SITE ? POND PRIMARY SPILLWAY m. TO EXT~,NDED D ENTION l ~ '~1 ~ 1, ~{d I ` i ~-7 Q r~ ';iv' i a`~ ~ t SEAL r.
~ ' , € ~ TOTAL ACREAGE: 7.361 AC. I I ) J s , 4'4 PRECAST M.H. ~ ~ I z ! WETLAND ~ ND 6 ASSING ~ . i' ,l~~ ~i ~ r ; p. ~ , 1 ~i, r r' 2 r
_ _ EARTHEN t3ERM . ''r ' PIN: 0738-03-01-8050. RIM 259.10', INV. 254.0'. ~ i I ~ ~ ~ ~ ' E ' •.r•:~~:~: ~ ~ I ~ 1 ~ FOREBAY T•.537 ' ' o' ~ ,TOP WIDTH= 3 ~ 1 )Q-SLO „ Parcel-ID: 541 -02-002. ,r-' f 1 EFE 268.00 ` ~ I '
47 L.F.- 30" RCP W/ f _ 1 e~. NI UM ~ t :::i•::. \ i f i CHANNEL EXTEt~pED D NTION WETLAND f ~ ~ M ~ ~ hr Parcel Acreage: 7.36 acres. p 0-RING WATERTIGHT GASKETS I ~ I i I ~ ~ I ~ ~ M ~ v i Q 1
®1.0% P- 254.0' DOWN- i ~ ` 12" DEPTH REQUIRED TO FSEi THE ~o ; ~ ~ PkAa^E 1 ANSI IDRAI AGE+, AREA Deed Book Reference: 36661481. ~ ~ j . U CH NEL "B" (TRAP.) 1. % ~ t k fiH'S 2~{3NS1T~~bRAI 'EAR 1 ~ 'L k ~ 16,440 S F,, D ~
' LOSS OF'`STREA BUFFER TO / c A~ TO`' 1rXTEN' ED ENTI N W LAND Plat Book Reference: 44177, ! j 253.53'. SEE DETAIL SHEET. f ' i ro SLOP , S.S.- ~:1, W- Q ~ I , SATISFY BO?1+~.,COD ND DEPTH V S. ~ ufA FORE Y / . i'07AC. j U Ex. Zone: NC & RD BUILDING 'S.6 i ~
f~' 1 , ~ O ' I NCDW .SEE BLOWU _ s ~ r , , ~ ' - " ~ STRAW N G ~ r ~ Ex. Use: Vacant Residential ' r- , . , -FFE 263.00 '4 f 1 t' ~ '
' ALL AREAS CEPT F R S.D. i i 4 ` ; E pED DETEN?ION W~LAN CHANNEL (&x Cape Fear River Basin. I I 'I 33 D BUF ~ r' ESMTS., BERMS, FILL ODES, AND ~ ~ I I ' ~ ~ 3' EXTENDED DEfENT p _ - . ~ o Y ~ I ' a_ ! ? ( FOR RE I~~EW UNL Y. 3 N W~_... ~ ~ ~ _
N DETENTIO WET ~ ;`DEPTH- 15" , ; f CHANNELS} T`O BE REF RESTED WITH ; ! I F/J-B Watershed. f E~ EO LAND EgSE 36" RCP ~ ` ' ~ AGRICUWRA~ PINES D STA6ILIZED ' , , ENO . . , , ~ 3 , ~ , ~ Nor FOR coNS rRUC riON.
I M , i I r i ~ ~ i l~ ' ~ INV.- 254.p' r ~ ;i I WITH PERMANENT GRAS GROUNQ. C j ' I f , I ! , ~ Q I+ COVER TO PREVENT ER SIGN. ALL 1 } I ! ' FFf r ~ a ~ ~ PARKING LOT PA' NT ~ i~ ~ r'~ ~ I 3,004 5:~. tl' ~ I I ~
f 6' 'k'IDE 8 M / CHANfdEL "D"~ AREAS TO BE STABILIZE WRH ~ ! ~ ' I ~ ~ 31"L.F. X1.09 SLOPE, S.S.- 40:1, GRASS GROUND COVER.. HASE 2 O S E I ' i P NIT ~ I ~ OIN6, ~ 1 ~
36 RCP w , f w 4 _ _ CHANNEL A GRASS V-SHAPE I = o~~ 0' ~W- 6", DEPTHr 6". )i ! ~ ( ) ~ ~ t2 9 ~ I ~ DRAINAGE AREA DRAINS ,f j , ' , ~~t I ~ -r . r::- Y°~~ ) ~ vS ~ ~ ~
I ~ ' i r ~ ~ , ` ` ' ~ ~ i W POLY NEITIN 1. % SLOPE. ~ ~ ~ ~ ~ . ' TO EXTENDED DETENTION G 0 U. , I / , ' `tC8-1 EE 4ETAIL SHEET) ~t ! , O n I ~ i 0
S.S.- 2:1 D- 24". LINE FIRST I 0 REBA ~ ~ x a' ARD! INLET ' I 1 ~ ' ~ , WETLAND BYPASSING I ' 0 ~ ' _ , 20' OF CHANNEL W/ d50 9" ~ I ~ ° - R1M- 2 .1',~7oP-;261.93', I ~ ~ ! FOREBAY(0.453 AC.) ~ I i j, i Q ~ 0 ~ r FFE267.00 ~
~ , - RIP-RAP, D=23", FABRIC. ~ ; ~ t rINV.- 2 .oi 4 SIDES OPEN. " ~ ~ 1 ) I , ;
j Ti ~ i ) ~ { r ! I ` I~ RTNe EN 0 TREE PROXECTION FENCING. i ,I 9 I i _ s.. FFE 26fi,00 ~ o % j I ,
1 i N p {tTH t , 28 :87,' r AM ~ 4, 1 _ r- ;SEE DETAIL 'SHEET. ~ i ~ I i, - PARKING LOT! ~ ~ ` ',t i .,t__~.3~ ~ I
- ~ ;i I , i , ' ~ ""w- STRAW & NETTING , , ~ i ' LINE EMERGENCY SPILLWAY I ~ ~ -'"t~ , ti- ~ cwANNEL c (rRaP~ ~ I ' ;1 ~ I ~ ~ + ~
I , , ,ti .w A~~ ~ ~ ' WI BERM 1.0~ SLOPE, 5.5,= 3:1, , , ; I'. I ~ ~ WITH TURF REINFORCEMENT I ~i ~ ~ ~ ~ ~ r, 6 DE , INy~, 5" f~_ ~'R l ( 'J A 'v. J, ~ ~ V ~ ~ 4 W- '4', DEPTH? 18". ~ I RCP~~'r' ) ~ ~ x,
MATTING. SEE DETAIL SHEET. I II ti FLOW r UMITS OF ' ;a~4.1 I 1 , )y ~ ; 1HEN BERM A ! 1- r jl i , DISTURB NCE I I + i ~i~ 1 ~ IR I - aP~. I i / '.T r is I
,,A;'~"~~ , TOP WIDTH= 3t t , ~ t ~r r i t i A'\'',~ v . ~ ~ ~ ~ t r ~ I; r ~ ~ ~ i ~ ; , , , J
i i i. 4 , ~ 1 \ . , i' i . _ i ~ ~ I ~ ~ . n - " ~ ~ ~ R A! IN PARKING LOT ~ 1 , - ` WALL ~ ~ ii
t _ ' ~ ~ F ~ r VEGETATION ` , _ _ - Q~, I L
~ ~ VEGETATIO 0 " ~ i` ' ~ - ; _ ~ ~ T~ REM ~ . 1:<-,-",~"," c:i ; + , AIN { R ~ M r AIN i VEGETATION. , ~ ~ ; ' ~ ,
_ _ " r ~ ~ f + . _ ` . -
NEW 66" RCP CULVERT TO I ~ _ - - .4 . ~'j'f" 'P JECT. o ~ ~ ~ ! ~ ~ i - I ~ , BE INSTALLED BY NCDOT. ~ I ~ - ~ ( ~ - ~ ~ ,
E I i .r - ' ti P$'' CEMENT •4.,_ ~ _ _ ~ r i ~ j .r , _ ; 2 P
' 102 P. - _ . -n - , , ; i 't ' \;s w. 3 169).. . ~ ~ ~ ii i S , f BENCHMARK, _ ~ , , ' , I~, ~ ~ I ~ .169 _ . . ~ $ r ' r , BENCHMARK;: ~ rw ~ ~ ' ~ - ~ ~ ~ ' 1 I i
• ~ SSMH RIM ' PERMANENT STORM DRAINAGE ~ < SSMH RIM / ~ i i i i . _ v
ED TO NCDOT FOR- ~ ~ i ( ~ `i ESMT• GRANT _ - ~ r i ~ I ' ~-EL.-~6~:17' NEW cuLVERT INSfALtATION. ~ f ~ I ~~E / ~ I ~
f ~ ~ = ~ ' ~ 'j ~ ` ` _ - I ~ j ~ ! ~
i , _ ~ MAGNETIC ~Pa3.44 , P.77)1978 Z
SURVEY INFORMATION: 2-54" RCPs & HEADWALL, Boundary and Topographical Information Taken from Puckett & Associates Survey. JURISDICTIONAL INV. ELEV. 256.00'. CONCEPTUAL STORM DRAINAGE SYSTEM
Additional Topgraphical Information Taken from Durham GIS Mapping. INTERMITTENT STREAM 16' X 20' RIP-RAP VELOCITY
No USGS Monument Within 2000' of Property. {BEGINNING POINT) DISSIPATOR. d50=9", d= 23", 50' 0 50' 100' 150' PHASE 2- CONCEPTUAL COMMERCIAL 50' 0 50' 100' 150'
LINE W/ FABRIC. DEVELOPMENT BRINGS 7.36 AC. PARCEL TO 70 IMPERVIOUS WITH APPROX. 64,000 S.F. OF
Scale 1" = 60' BUILDING AND 160,421 S.F. OF ASSOCIATED Scale 1" = 60'
PAVED AREAS. ALL IMPERVIOUS AREAS ROUTED W TO THE EXTENDED DETENTION WETLAND. L
TURF REINFORCEMENT r
ATTING TO 24" DEPTH. LB1S.F. SHEAR RATING. STRAW & NETTING N LL
b ~ TO 6 DEPTH WHERE ~ o STRAW & NETTING TO ~ ~ N a a SHOWN ON PLANS. 3" DEPTH VVHERE rya c w N w o w GRASS LINED
~ -.-I 3.0' ~ SHOWN ON PLANS. o GRASS LINED f0 0
. - NATURAL 3'1 3: T NAT I 3: ~ ~ 10.0' BERM 40:1 _G -~RAL_..... -?2.0 ~ NATURAL 3 ti ..._..NATURAL GRADE._ 2.~ RADE PHASE 1 HYDROLOGY DATA:
_ 1 - GRADE r~1 RADE 4.0' ,NATURAL 3~ 3~ ONSITE DA TO EXTENDED DETENTION WETLAND BYPASSING FOREBAY = 1.537 AC. LG
6.0' ~ 4.0' ONSITE DA TO EXTENDED DETENTION WETLAND VIA FOREBAY = 4.107 AC. ~
- TION CHANNEL "B" & "C" GRASS TRAPEZOID GRADE XSEC ( ) X-SECTION CHANNEL "A" (GRASS V-SWALE) (NOTE: DEPTH VARIES. SEE PLAN VIEVV) X-SECTION PERMANENT CHANNEL "D" (TRAPEZOID) X-SECTION CHANNEL "E" (GRASS V-SWALE) X-SECTION CHANNEL "F" (GRASS TRAPEZOID} 0 ONSITE DA BYPASSING EXTENDED DETENTION WETLAND = 1.716 AC. (ALL PERVIOUS AREA) J L
- r w
k f - OFFSITE DA TO EXTENDED DETENTION WETLAND BYPASSING FOREBAY = 0.013 AC. y APR 2 S 2005
• 33 WID ATED WET OFFSITE DA TO EXTENDED DETENTION WETLAND VIA FOREBAY = 0.210 AC.
SAND BUFF DENR • WATER QUALIT± WETUWDSANDSTORMWATERBRANCH TOTAL DA TO EXTENDED DETENTION WETLAND = 5.867 AC.
~ E R t D I M E N T D I S P ~ IMPERVIOUSNESS OF 7.36 AC. SITE = 3.83
• WATER QUALITY POOL S A ~ ~ ,r f A R ':b,, '
. m ELEY. 25&68' E q • • ~ ~ NORMAL POOL ~1~, : PHASE 2 HYDROLOGY DATA: ~
f ~ ~ 26-~ ELEV. 257.00' ~ ~ ~1 , ,FK ~ -SC ~ ~ ~ ,
_ f ~ , _ 257.5 PLANTING GUIDELINES FOR WETLAND PLANTS: = 0.453 AC. ~ GRAY'S SEDGE- PLANT PLUGS 4'~ AT ELEVATION 257.25' ONCE THE ONSITE DA TO EXTENDED DETENTION WETLAND BYPASSING FOREBAY
f ~ l EXTENDED DETENTION WETIAND IS HOLDING WATER. DO NOT APPLY ONSITE DA TO EXTENDED DETENTION WETLAND VIA FOREBAY = 5.656 AC.
~ OVEREXCAVATE 12" DEEP ALL AREAS ASSOCIATED WITH WETLAND c ? PLANTING PLAN AND REPLACE WITH ORGANIC TOPSOIL STOCKPILED LAND LIME. ONSITE DA BYPASSING EXTENDED DETENTION WETLAND = 1.251 AC. ALL PERVIOUS AREA ~ ( ) KPILED
f ` : • i',' FROM SITE. a r • Q • ~ ; . FK COMMON THREE SQUARE- PLANT PLUGS 4'4 AND 8'0 AT ELEVATION FF IT DA TO EXTENDED DETENTION WETLAND BYPASSING FOREBAY = 0.000 AC.
D ~ , , ~ . X' ~ 1, , Q ~ ----~--fir '-;'f ;/,r,,f/f, f „s;~. COLLECT TOPSOIL AND HER64CIOUS VEGETATION SAMPLES (SEEDBANK) 256.75' ONCE THE EXTENDED DETENTION WETLAND IS HOLDING WATER. 0 S E Z SEEDBANK) Da NOT APPLY uME. OFFSITE DA TO EXTENDED DETENTION WETLAND VIA FOREBAY = 0.028 AC. 0
I ~ j ~ 562b"~ ~ „ f ;!f : ~ ~ FROM WETLAND AREAS FROM ONSITE AND/OR NEARBY OFFSITE FOR , ' iITE FOR ~ m
'256.5 , , ' ~ ; ; - ' - • - REDISTRIBUTION INTO THE CONSTRUCTED WETLAND TO INTRODUCE A !>~6:`1,5: r 257 ~-N ! J ' , f/, f,, _ , i• ~ i, ; / " r,~; , u DIVERSE ARRAY OF LOCALLY ADAPTED WETLAND PLANTS AND OTHER )DUCE A SOFT STEM BULLRUSH- PLANT PLUGS 4'~ AT ELEVATION 256.50' ONCE TOTAL OA TO EXTENDED DETENTION WETLAND - 6.137 AC. & 3 OTHER THE EXTENDED DETENTION WETLAND IS HOLDING WATER. DO NOT APPLY ~ p
~ , - 2$728 J;; '4 ORGANISMS INTO THE CONSTRUCTED WETLAND. DISTRIBUTE THESE C~ THESE LIME. w U IMPERVIOUS AREA TO EXTENDED DETENTION WETLAND = 5.180 AC (INC. 0.028 AC. OFFSITE) Q p Z
~5 N r ~ ~%r:' "SEEDBANK" SAMPLES INTO THE AREAS SHOWN ON THE CONSTRUCTED WETLAND PLANTING PLAN DETAIL. NSTRUCTED DUCK POTATO- PLANT TUBERS 4'0 AT ELEVATION 256.50' ONCE THE % IMPERVIOUSNESS OF 7.36 AC. SITE = 70.0
i „i f % f , , , % 257 ,~`-v lj~, i/r f,r i /Jr// 'J Y';~S^a f ~ • , ; ~ i' f,~,i' % i/, 2567 • F-;A~ _ EXTENDED DETENTION WETLAND IS HOLDING WATER. DO NOT APPLY - _ IMPERVIOUSNESS TO EDW = 84.40%, SA/DA - 3.5272. ~
~ , i, , , ' / r , ' % ~ r':. ' SWITHGRASS MECHANICAL BROADCASTING OVER SCARIFIED 12" ~ I ; ,r,r? r / 256.5 , ~ 12" LIME. EDW SURFACE AREA REQUIRED = 0.2165 AC. (9,431 S.F.) Z Q a
ri ~ ''f 5=-~-s'-- T APP Y LIME. PROVIDE r 'r , / , 'r'' ~ 25625 TOPSOIL ABOVE ELEVATION 258.0. DO NO L I ~ ~ j;; ~ ~'~'~~'t MULCH & NETTING COVER. PROVIDE TEMPORARY COVER TO PREVENT PROVIDE - - 4 AC. 9 599 S.F. ~ ~ ~ FO PREVENT WOOL GRASS PLANT PLUGS 4'0 BETWEEN ELEVATIONS 257.00 & EDW SURFACE AREA PROVIDED - 0,220 ) N
f , ~ , ' /'?r`;' I EROSION WHILE SWITCHGRASS IS ESTABLISHING. FK ~ ~ 2572 'r? f , ; 257.25' ONCE THE EXTENDED DETENTION WETLAND IS HOLDING WATER. DO NOT APPLY LIME.
~ ~ 257 jt~"~ / . . ; r ~'%r ` r~,5 BUTTON BUSH- PLANT IN EARLY SPRING ONCE THE EXTENDED )ED C
25725 SB / , , , r j /r DEFENTION WETLAND IS HOLDING WATER. . ~f ~ ,A. S` 257.0 ~ ~ ' / id.. r`~" ^ t " AMERICAN LOTUS- PLANT RHIZOMES AT ELEVATION 254.00' ONCE THE
}p ~ r / , - y ~ 7'~%~4 ~ x r. r;y~^V,t ,~.r+ , ,J~ , L, ; , „ ; , , u , BLUE FLAG IRIS- PLANT EffHER PLUGS 18"0 OR SEEDS 12"~) WATER LEVEL IN THE EXTENDED DETENTION WETLAND REACHES Senlor Engineer; (12"~) ELEVATION 255,50'.
h;~ "'x ^ ~ ' ~ •a,~ r~, • DEPENDING ON AVAILABILITY AND SEASON OF PLANTING. PLUGS ARE Lucs ARE K. WRENN
~ ~ v : r, ~,,";rj ? , ~,-7:.,,~,.~ USUALLY AVAILABLE IN EAf~Y SPRING. PROVIDE NEUTRAL ph PLANTING " ' ~ 'Y ^ 'ii • ~ -,+~u SOIL BY LIMING IF NECESSARY. PLANT ONCE THE EXTENDED r ; ~h PLANTING PICKERAL WEED- PLANT RHIZOMES 4'~ AT ELEVATION 256.50' ONCE =D THE EXTENDED DETENTION WETLAND IS HOLDING WATER. PROVIDE ~raWn "1
' ~..k,r .y%~, " " -.x, , ~ t" ,5. DETENTION WETLAND IS HOLDING WATER. I L, ~ ~r, ~ ~ ~ s~,, ~ ~ ~ r' NEUTRAL pH PLANTING SOIL BY LIMING IF NECESSARY. OFFSITE K. WRENN
r ' ,i ? • a CONTRIBUTING
" ~ J e ~ " !1 DRAINAGE AREAS ~UE
N ,u A ~ EN , , N0. DATE DESCRIPTION
G";. i FK $7 SL FK r~ :I~ ' k ' J SYMBOL KEY BOTANICAL NAME COMMO COMMON NAME CLASSIFICATION PLANTING SIZE QUANTITY REMARKS 1 12/21104 NCDW9SUBMITTAL
_ µ"a. ~ ti r PlushTex u - ype ~ Z 2 4/27/05 NCDW9 RE-SUBMITTAL Turf-Type Tall Fescue Miz Ground Cover Seed As required 5 lbs./1000 Sq. Ft., 10-10-10 fertilizer 25 Ibs/1000 s.f., pellet lime 50 Ibs/1000 s.f. 1,
• = GRASSES OR 1` w _ i a FK Festuca arundinaceo Kentucky 31 ~ K Kentuc 31 Fescue Shade Tolerant Ground Cover Seed NI grass channels 5 Ibs./1000 Sq. Ft., 10-10-10 fertilizer 25 Ibs/1000 s.f., pellet lime 50 Ibs/1000 s.f.
f , . , _ . I' r 1~ i r'y ;n;.f GROUND COVER ~ J Switch Grass Perimeter Seed 1 Ibs Broadcast as shown above elevation 258.0' (3,655 S.F.)
' ~ _ ! PJ Panicum vergatum Switch Gras I` ~ , ' z„ CITY OF DURHAM
~ r5' ~ ~ ~ \ C~ ~ i `~r,.y.'G SFFf1RANK SB Vnrinus Vohmteers from Onsite/Oifsite Seed r Onsite/Oifsite Seedbank Wetland Plants /Soil Samples Shovel Full 150 Samples Distribute seedbank specimens at elevation 257.0' (shaded area) ®4' o.c. EX. TREELINE PROP. TREELINE STREAM BUFFER
ilis Button Bush Emergent Shrub Plugs or 1 Gal. 6 Plant as shown at elevation 257.50' DATE DRAWN FILE NAME
a• , , ; r~ ~ CO Cephalanthus occidentalis Button Bus IV Iris virginiano Blue Flag I Blue Flag Ins Emergent Peat Pots or Seeds 60 or 120 Plant 18"0 (plugs) or 12"0 (seeds) in groupings as shown at elevation 257.25' W91-*eplan
HATCH KEY FOR POND DEPTH REGIMES BLOW UP DETAIL r x r gay i Gray's Sedi ~ > ~t CG Ca a y Gray's Sedge Perimeter Plugs 54 Plant 4'0 as shown at elevation 257.25'
EXTENDED DETENTION WETLAND GRADING and PLANTING PLAN NOTES: Z Q 1.OVEREXCAVATE 12 DEEP ALL AREAS ASSOCIATED WITH SP Scir us un ens Common TI PROJECT 03101.00 Common Three Square Emergent Grass Plugs 211 Plant 4'0 and 8'0 as shown at elevation 256.75'
20' 0 20' 40' 60' WETLAND PLANTING PLAN AND REPLACE WITH ORGANIC a Sv Scirpus volidus Soft-Stem- - ; (24x361. Soft-Stem Bullrush Emergent Grass Plugs 26 Plant 4'0 as shown at elevation 256.50' E: . I SHEET SIZE. D-SU Duck Potato Emergent Tuber 158 Plant 4'0 as shown at elevation 256.50' OFFICIAL TREE PROTECTION INTERMITTENT
TOPSOIL STOCKPILED FROM SITE. SL Sagittaria loncifolia Duck Potat
erinus Wool Grass 2.OVEREXCAVATE THE MICRO POOL AND FORBAY TO Q A SC Scir pus cyp Wool Grass Emergent Grass Plugs 61 Plant 4'0 as shown between elevations 257.00 - 257.25' TREESAVE AREA FENCING STREAM SHEET wQ1
Scale 1 20 ELEVATION 253.00 (1 BELOW DESIGN GRADE) TO ALLOW w NL Nelumbo lutes American L American Lotus Emergent Rhizomes 4 Plant as shown at elevation 254.00' SYMBOL HATCH KEY FOR SITEPLAN OF
FOR SEDIMENTATION VOLUME. 16"-36' DEPTH 9"-18" DEPTH 0"-9" DEPTH 0"-36" FOREBAY x PC Pontede6o cordato Pickeral We Pickeral Weed Emergent Rhizomes 53 Plant 4'0 as shown at elevation 256.50'
ti
I
I.

HANDWHEEL ACTUATOR FOR OPERA UATOR FOR OPERATING JALVE. PROVIDE BRACKET TO NORTH
d a BOTTOM DRNN VALVE. PROVIDE BR NOTE: AlL FEROUS COMPONENTS ARE TO BE STABILIZE RISING STEM. STEM.
8"~ X 1 2" STEEL PLATE CUT IN HALF FULLY BITUMINOUS COATED INSIDE AND 4.90' INSIDE 9 / OUTSIDE. W/ 4" x 6" HEAVY DUTY HINGE W/ BAND FOR MO 4.90' INSIDE 0 X 2.5' X 1/4" STEEL BAND FOR MOUMING TRASH RACK TO
• ' SIX BOLTS. WELD REBAR TO PLATE. CONCRETE MN NOTE: SEE DETAIL AT UPPER RIGHT CORNER 3 CONCRETE MANHOLE.
OF SHEET FOR DRAIN AND ACCESS STEP 48"~ CONCRETE e 1/2" REBAR TRASH RACK. NO CLEAR ORIENTATIONS RELATNE TO EACH OTHER. 48"4 CONCRETE PRECAST MANHOLE WITH 8" FLANGED DIP EMERGENCY
OPENINGS GREATER THAN 8". E~(TENDED BASE. RACK (NO OPEN rEXTENDED BASE. PROVIDE DOMED TRASH DRAIN PIPE AND 8"0 FLANGED 4 DIP DRAWDOWN PIPE WITH 2"~ RACK NO OPENINGS GREATER THAN 8" PLUG VALVE W/ RISER ROD & RESTRICTER PLATE FACING EAST.
24" NOTCHED WEIR EL. 258.68'. TOP /SPILLWAY ~ ~ HAND WHEEL. FACING NORTH. SEE DETAIL TO LEFT. TOP /SPILLWAY EL 259.10'.
TOP REBAR RING WELDED PROVIDE 1" GAP IN REBAR FOR FACING EAST. WELD 1/2" REBAR ° _ TO BLIND FLANGE. HINGE OPERATION OF TRASH RACK. AS SHOWN TO PROVIDE OPENINGS ° PRECAST HOLE SEE DETAL TO LEFT. PRECAST HOLE TO RECENE 30" RCP. fir'
N " ~ GROUT WITH HIG • 2,5" X 1/4" STEEL BAND FOR WELDING NO GREATER THA 8 CLEAR. w CEMENT GROUT. GROUT WITH HIGH STRENGTH PORTLAND CEMENT GROUT.
• • a REBAR TO AND FASTENING TO 48" MANHOLE. ° ~
i ATTACH TO 48" MH W/ 1/4" GALVANIZED ~ • ' ( ' I • SCREWS & LEAD ANCHORS 8" O.C. o ? 47 L.F. 30" CLASS III RCI `~0• 30" CLASS III RCP ®1.00% W/ MODIFIED -
d < 4" DIP DRAWDOWN PIPE WITH 2"~ r NOTE: RESTRICTER PLATE FACING EAST. g BELL & SPIGOT MEETING SPIGOT MEETING REQUIREMENTS OF ASTM
• • • 4" DIP OPENING. C76. PIPES SHALL BE C HIDDEN 1. SEE DETAIL AT UPPER RIGHT INV. AT M.H.- 257.00' 'IPES SHALL BE CONFINED 0-RING RUBBER ~ ~ ~ JOINTS MEETING ASTM C-443 AND JOINTS /
( ~ INV. AT INLET- 256.00' o in GASKET JOINTS MEETING ~ CORNER OF SHEET FOR DRAIN AND ~ ASTM C-361. PIPE JO PROVIDE TRASH RACK. SEE DETAIL ~ M C-361. PIPE JOINTS SHALL BE TYPE R-2. 65,50' Civi! Engineering
DETAIL- TOP VIEW ACCESS STEPS ORIENTATIONS roP vfEw TO LEFT. 24" NOTCHED WEIR EL. 258.67'. Land Planning
( ) RELATIVE TO EACH OTHER. 4" DIP DRAWDOWN PIPE 8" FLANGED DIP EMERGENCY ' ~ • ~ PROVIDE PI PROVIDE POLYPROPYLENE COATED MANHOLE FACING EAST. SEE DETAIL TO LEfi. Slte DeSlgn
IN T W TRASH RACK 2. ALL FEROUS COMPONENTS ARE DRAIN PIPE AND 4"0 FLANGED ~ ~ STEPS ® 1 LE / 8"0 X 1/2" STEEL PLATE TO BE FULLY BITUMINOUS COATED g" FOR WELDING REBAR T0. PLUG VALVE W/ RISER ROD W/ FILL MANH( STEPS ®12" VERTICAL SEPARATION. FILL MANHOLE W CLASS 3 CONCRETE MANHOLE STEPS CENTERED ON WEIR
INSIDE AN OUTSIDE. ~ ~ HAND WHEEL. FACING NORTH. - ; TO ELEV. i 1/2" REBAR TRASH RACK. NO CLEAR ~ 30 RCP OUTLET PIPE. SPILLWAY. TO ELEV. 254.00 FOR ANTI-FLOTATION. SEE DETAIL TO LEFT.
INV.- 257.00'. USE LEAN 0 . ° USE LEAN . , . ,G . ~.p , . OPENINGS GREATER THAN 8". SEE ° ° USE LEAN PORTLAND GROUT INSTEAD WRENN ENGINEERING CO. OF CONCRETE WITHIN 4" OF ORNN 1910 SEDWlCK RD.
30• TOP VIEW FOR REBAR LAYOUT PORTLAND GROUT TO 4" BELOW OF CONCRE & AROUND VALVE FOR FUTURE .83' VALVE FOR 2.5" X 1/4" STEEL BAND FOR WELDING MAINTENANCE INSTEAD OF vALVE FoR MAINTENANCE. DETAIL- TOP VIEW OF RISER su~rE Zoo-C
4" DIP FL-PE WALL COLLAR REBAR TO AND FASTENING TO 48" MANHOLE. POURING CONRETE FLUSH TO MONOLRHII MONOLRHIC EXTENDED MANHOLE BASE. DURHAM, NC 27713 SHOWING DRAIN ORIENTATIONS [phone]
ANCHORED W/ HIGH STRENGTH ATTACH TO 48" MH W/ 1/4" GALVANIZED VALVE. BOTTOM EI BOTTOM ELEV. 251.60'. BLOWUP SCALE 1" = 3' [phone] fax
PORTLAND GROUT. SCREWS & LEAD ANCHORS 8" O.C. BLOWUP SCALE 1" = 3' [e-mail]
8.5" O.C. MAX. SIDE VIEW OF WEIR TRASH RACK. 4" DIP FLANGED cv NOTE THAT THE RACK REBAR IS NOTES: 3. THE 30" BARREL IS CIASS III RCP, MODIFIED 5. OVEREXCAVATE 12" DEEP ALL AREAS
LONG RADIUS ELBOW. 4" DIP DRAWDOWN PIPE WITH 2"0 ~ 2.00' EXTENDED AND BENT TO PROTECT t. DURING CONSTRUCTION THE RISER WILL BE 3. THE . RESTRICTER PLATE FACING N.E. o WEIR FROM oEeRls BLOCKAGE. SURROUNDED WITH WASHED STONE TO SERVE AS BELL AN .S BELL AND SPIGOT, MEETING THE REQUIREMENTS ASSOCIATED WITH WETLAND PLANTING PLAN _
PROVIDE wALL ANCHOR COLLAR. A SEDIMENT FILTER BEFORE THE WATER ENTERS OF ASTM INV. AT M.H.- 257.00' OF ASTM C76. PIPE JOINTS SHALL BE CONFINED AND REPLACE WITH ORGANIC TOPSOIL
INV. AT INLEE- 25s.oo' 1/2" REBAR wEIR TRASH RACK. THE RISER AND OUTLET PIPE. 0-RING SEE SIDEVIEW ABOVE. C-443 ~ 0-RING RUBBER GASKET JOINTS MEETING ASTM STOCKPILED FROM SITE. SEE SHEET WQ1. REQUIRED VOLUMES FOR EXTENDED DETENTION WETLAND C-443 AND JOINT OF ASTM C-361. PIPE GA
2. THE 4"~ DRAWDOWN PIPE, THE 24" WEIR JOINTS ~ S ELEV. FOREBAY MAIN POND JOINTS SHALL BE TYPE R-2. 6. OVEREXCAVATE THE MICRO POOL AND ACCUMVOLUME
easKET REE3AR TRASH RACK. AND THE 48"~ RISER AR T HAV A P RMAN NT SEE DETAIL TO LEFT. E 0 E E E (S.F.) (S.F.) C,F. Qt~ES~fC~ ' :NT FORBAY TO ELEVATION 253.00' (1' BELOW I ! ~ 253.00 229 644 0 ~ Q
TRASH RACK MOUNTED TO EACH OPENING TO 4. THE E r • " 4.00' PREVENT DEBRIS FROM ENTERING. THE OPEN USED AS 4. THE EXTENDED DETENTION WETLAND WILL BE DESIGN GRADE) TO ALLOW FOR SEDIMENTATION 254.00 382 892 0 ~`I'" ' USED AS A TEMPORARY SEDIMENT CONTROL VOLUME. `
i . 5" WALL ~ THICKNESS AREA OF EACH ORIFICE'S TRASH RACK MUST BASIN DI 255.00 522 1165 1471 G s~ BASIN DURING CONSTRUCTION AND MUST BE 255.50 612 1322 2376 ~ -
° EXCEED THE ORIFICE AREA TO PREVENT FLOW CLEANED CLEANED OUT, VEGETATED, AND OPERATIONAL 256.00 709 3613 `7' 3940 FM ' V
TRASHRACK BLOWUP SCALE 1" = 2' I PRIOR T( A RESTR CTION. SEE DETAILS. BEFORE PRIOR TO USE AS A WET DETENTION BASIN AND 256.25 1171 4772 5223 'L~ BEFORE ANY PERMANENT BUILDINGS ARE 256.50 1239 5469 6804 ~
~9.5"~ , OCCUPIED. 256.75 1308 5999 8556 ~°~"V~"°`
ORIFICE TRASH RACK. O.C. 24 NOTCHED WEIR EL. 258.68 OCCUPIE WELD i/2" REBAR TO 257.00 1379 8220 10669
BLIND FLANGE AS ELEV. FOREBAY & ACCUM VOLUME FOR RE UI EW ONLY.
OPEONINGS GREATER DETAIL- SIDEVIEW 4" DIP ORAWDOWN PIPE WITH 2"~ ( ) „ MAIN POND (C.F.)
THAN z". 4" DIP DRAWDOWN PIPE RESTRICTER PLATE. 48 ~ CONCRETE PRECAST :TE PRECAST MANHOLE WITH EXTENDED (s.F.> NOT FOR CONS~RUCTlON.
INV. AT M.H.- 257.00' BASE. PROVIDE DOMED TR. ~E DOMED TRASH RACK (NO OPENINGS 257.50 10313 15647 258.00 11050 20988
INV. AT INLET- 256.00' GREATER THAN 8") BLIND FLANGE W 2",a EX• GR ' N 8"~ 258.50 11776 26695
/ _ __OUNp P SPILLWAY EL. 259.10 HOLE DRILLED IN BOTTOM _ R~FI~E 259.10' 258.68 12001 28835 259.00 12476 32752
TO CONTROL INFLOW. ~ _ ~UAR~ . ES) , 16' WIDE EARTHEN BROADCRESTED WEIR zeo.oo laooa 45993 10.00' EMERGENCY SPILLWAY ELEV. 260.0'.
• 1/z" RE&4R TRASH 2YR ELEV. 259.56 DAM EL. 261.0' ,
RACK CAGE. MAX. 2" ~ , • ' ' oPENINCS. 1fi30YR--ELEV. 260.25 _ 10YR ELEV. 259.84 _ I _ LINE 20 L.F. OF DITCH
• • = W P ELEV. 258.68 - ;.I
• _ •1 - I 4" DIP OPENING. - - - - - ;I;,. - - i' ~ I I = W RIP-RAP. BRI - - I - 30 RCP FES / NG - I ~ - ~ I- - ~;I,
(HIDDEN) NORMAL POOL - - _ _ _ _ _ _ _ _ _ _ - _ _ ~ 3'1 ELEV. 253.53'. RIP-RAP UP TO ELEV. - - - Ut
ELEVATION 257.00' _ DETAIL- (BOTTOM VIEW) 47 L.F. 30" RCP ~ 1.00 - 255.53. SEE PLAN. - ~ Z ~ 1.00 W E -
4" DIP DRAWDOWN PIPE INLET W/ 2" RESTRICTER PLATE & TRASH RACK. POND DESIGN INVERT EL. 254.0' TIGHT 0-RING GASKETTED ~ASKETTED CT N ~ - _ Q
SEDIMENT STORAGE J - - - _ F-
SEE PLANTING PLAN FOR WETLAND OVER EXCAVATE MICROPOOL & FOR&4Y TO EL. 253.0' TRASHRACK BLOWUP SCALE i" = 1' PLANTING SCHEDULE FOR BASIN. - a W
_ - Q - - ~
- 30" RCP OUTLET JTLET ~~10.00'
8 BOT. DRAIN & VALVE EL. 254.00. - - INV RT L. 254.0' E E Z 254.0 W
CORE OF DAM TO BE SELECT LOW PERMEABILITY CLAY Z
EXTENDED BASE OF MATERIAL AND COMPACTED TO 98~ DRY DENSITY. WHERE W
~ SECTION THROUGH EXTENDED DETENTION WETLAND PRECAST MANHOLE. CONC. NOTE: SEE DETAIL AT UPPER RIGHT yyQ~ SCALE 1 = 6 BASE EL. 251.60' FOR DRAIN ORIENTATIONS RELATIVE BHT CORE IS IN CUT, VIRGIN MATERIAL MAY BE LEFT IN PLACE IF W Q
TO EACH OTHER. VE DETERMINED TO HAVE ADEQUATE CONSOLIDATION & PERMEABILITY BY FIELD ENGINEER.
Q
I Z
I ~ ~ D Q
MIN. Z
~ _ ~ ~ LL
~ Z W W
~ ~ 9 MIN. i
~ ~ D
~ ~ Q Q FILTER
~ ~P R FABRIC Z f °~...~/%-9 TT
30 LL
1 ELEVATION
Q
6" THICK LAYER OF FLOW
I N 3/4" STONE
FILTER ~
l RIP-RAP VELOCITY DISSIPATER ~ 24" MAX W L FABRIC J W r 0 AT CENTER = 'n
CHANNEL LINING. LINE 20 / N Yi
L.F. OF CHANNEL AND UP / EXTEND PERMANENT TURF
SIDES OF FES. / REINFORCEMENT MATTINGTO NORMAL CLASS A
/ POOL ELEVATION OF POND (257.00'). 1 / ~ EROSION CONTROL STONE
ROCK CHECK DAM
/ WQl SECTION -
_ ~ a
~
~ ~ MOV£ FENCE OR M~ FExcE oR REMOIE REMOVE TREE IF MORE SEWENCE: Z W MAN 20x OF A 1REE'S 1. OBTAIN APPROPRIATE PERMITS ~ ~
- ~ ME SIDES OPEN. RIN ELEV. 281.00 I~ OtE ~ 2. HOLD A PRECONSTRUCTION CONFERENCE N1TH THE IANOSCAPE PROTEGTIgV SUPERVISOR, ~ /71 ~p CpISiRDCllp1 ARCHITECT OR LANDSCAPE ARCHITECT AND URBAN FORESTER. 3
_ • t• PREC/ST CONLREIE CWEIt M71N FUNOLES 7NCizEIE COr+R 3. ERECT TREE PROTECTIIXN FENCNG 4. CLEAR AND CRUB TREES AND SHRUBS TO BE REMOVED ~ ~ Q
5 3' rm 5. INSTALL SqL AND EROSION CONTROL MEASURES V 6. RWGH GRADE SITE 7. EXCAVATE FOR FOOTINGS, INSTALL UTIUTIES AND CONSTRUCT BUILDING O Q Z
D2 ~ e' oPE,~c POND EMERGENCY SPILLWAY PERMANENT TURF REINFORCEMENT Y 8. FlNISH FlNAL GRADING AND PA41NG ~ TMp• all ~ zaN: 9. REMOVE TREE PROTEC110N FENCING N
WQ1 SCALE: 1 = 10 MATTING "TRM". SHEAR RESISTANCE= 8.0 3/a' sLIOOTH &R 10. INSTALL LANDSCAPING NG EW. 7-4" MOPE I O ~ OR REMOVE / / ' / ~ ~
0 TREE ~I V Z Q N
LB/S.F. LINE EMERGENCY SPILLWAY UP 4~x4~ 3/a- RMIJS O O 8' S-a' 6, CPo71 ZONE Q V'
TO ELEV. 260.50'. LINE SPILLWAY INSIDE ~W AND OUTSIDE OF POND HATCHED AREA . oRx40l E NOTES
( ) ° HAV „T „ FI ~ ~ : 8. E RM ELD REPRESENTATIVE ~ a 1. ROOT PRUNE TREES TO REMAIN WHERE CONSTRUCTION ACTINTIES MILL SEDER ROOTS. 0 r 2 ANY TREE ROOTS EXPOSED BY CONSTRUC110N SHALL BE SEVERED CLEANLY WITH A ~ Nui PRUNING TOOL ~ Z
PRESENT DURING INSTALLATION. 3. DO NOT DISPOSE aF ANY CHEMICALS OR REMOVE Sql OUTSIDE THE LIMITS OF WORK. 4. WHEN INSTALUNG NEW LANDSCAPE PLANTS, DO NOT DRIVE EQUIPMENT UPON OR ORANGE IENSAR PLASTIC FABRIC OR EQUAL
~m e' DISTURB THE SqL WITHIN THE CRITICAL R00T ZONE OF EXISTING TREES. xEK71TN of FENCJ SH 8E aPPRO%IMATELY a SeNor EngIn96C 5. AT THE START aF GRADING INVOLwNG THE LOWERING OF EXISTING GRADE AROUND
~ w y_I~ y_1" A TREE OR STRIPPING OF TOPSOIL, A CLEAN, SHARP, VERTICAL CUT SHALL BE b' STEEL Pos f0 .SPACING MAIOMUM K. WRENN g,-a" MADE AT THE EDGE OF THE TREE SAVE AREA AT THE SAME TIME AS OTHER
~o AREA AAa1ND HVALE slwl eE COUNTER EROSION CONTROL MEASURES ARE INSTALLED. THE TREE PROTECTION FENCING . SUNK t' kD HM~OLE SWYL ~ FREE TO SHALL BE INSTALLED ON THE SIDE OF THE CUT FARTHEST AWAY FROM THE TREE HOVE ~ ~ DOMT7 TRUNK, AND SHALL REMAIN IN PLACE UNTIL ALL CONSTRUCTION IN THE VICINITY
~ ~ OP ~ 1 1' HPE sLELVE, z" LaNC ~ THE TREES IS COMPLETE. NO STORAGE OF MATERIALS, FlLL, OR EQUIPMENT
SPILLWAY SLOPED ~ 1.0% ~ r - ~ ,~0 TOP OF DAM B. cgNDa[rt ~ - J- ROTECTED A~REA~NG SHALL BE ALLOWED WITHIN THE BOUNDARY CF THE K. WRENN a 6. THE ROOT PROTECTION ZONE IS AN AREA THAT COVERS 1' RADIUS FROM THE 'NO iRESPA55MG raTliw TREESAVE AREA' 9GN5 TO BE INSTALLED ON TREE PROTECTKk!
3' ~ 'S' 1 EL 261.0' ~ : ~ T ~;~I;J ~ , 1.0' DEPTH ,I, ~ GRASS LINED SPILLWAY EL 260.0' ' TRUNK FOR EACH 1" CALIPER OF THE TRUNK. FENCING AT A MAXIAUM OF 75' O.C. I~7JLJE ~ y 7 7. WHERE BOTH TREE PROTECTION FENCING AND SILT FENCING ARE REQUIRED, THE WTNTIEN R1 eoTx SPANISH AND ENGIISH.
4° 0 IIMME ATALHMENf DEral TREE PROTECTION FENCING SHALL BE INSTALLED CLOSEST TO THE WOODLINE. A 8. TREE PROTECTION FENCE TO BE MARKED EVERY 75 TO 100 FEET APART WITH NO. DATE DESCRIPTION
i~ ~ ~ DETAIL OF YARD INLET SIGNAGE IN BOTH SPANISH AND ENCASH SAYING "KEEP OUT" 1 12/21/04 NCDWRSUBMTTTAL
~.1;, _ I ~ _ 16' TRAPEZOIDAL WEIR ~ ~--=1 ~ z" ~ 2 4/27/05 NCDW9 RE-SUBMITTAL
f ~ 4' X 4' YARD INLET YCB-1 ~ D4 TREE PROTECTION FENCING
/ l / ~ WQ1 PRECAST CONCRETE COVER W/HANDLES WQ~
~ ~ PERMANENT SPILLWAY LINING: ;
i I INF FNIFRGFNCY SPII I WAY I IP Tfl FI FV
260.50' WITH TURF REINFORCEMENT DALE DRAWN RLE NAME
D2 MATTING RATED AT 8.0 LB/S.F. LINE
POND EMERGENCY SPILLWAY SPILLWAY INSIDE AND OUTSIDE OF POND
WQ1 PERSPECTIVE VIEW AND TO NORMAL POOL ELEVATION 257.0. E PLAN VIEW ABOVE. PROJECT: 03101.00
SHEET SIZE: DSIZE (245x36)SHEET
OF W02

i
I r I t ~ ~ ; 1 ~ 1 ~ ~ ~ I ~ ~ ~ ~ CASE # 003-658 / i'~ .1 ~i
I / / / ~ PIN: 0738-03-01-8050
TO ~ I I ~ I:~ - ~ CHAPEL HILL I ROOTZONYE PROTECTION REA= AREAS , ' ~ ~ / / / Parcel-ID: 541 -02-002 ~ 1 OFFS ~ DRAINAG / / v 1
~o ~ I I r~c0 ~ ' 1 I I I I' " MEASUREq IN FEET RADI FROM THE TREE ~ 1 N ~ ~ r 1 ~ ~ ~ \ I ~ \ AREA (OSDA-GY > / \ I r.
C #54 HWy ~ ~ I i I 0 ~ TRUNK EQ TO THE TR NK DIAMET R IN \ i I, N INCHES & I NO LESS THAN 6' MINI UM ? DRAIN~jGE BASIN ~ / ;1 . ~ Ir ~AIN,'jGE BASIN A .0.621 AC. ~ / \ I
I I ! ' I, ~ ~ ~ RADIUS FRO THE TREE TR NK. I BOUND RY t 1 N ~ ~ ) R o II i l~ l,'o \ FUND RY rI R ~ DIVERTED ~ HWY - - \ W ,;r I r""~
TO~~ ~ ~ Z DOUG S & PAMELA LOWE ` i \ 1 ,~9. ~ 1 55 DIT~ \ rn /
oleic ~ I I ~ I ~ I I~'. H 1s I , ~ PIN 73 -03-01-9325 \ ue I I I o ~ T.M. ~ ~ d~ N OF6SITE DRAINAGE f I ~ ~ l.~'
IC - ~ ~ C.~ R I 1 I v \ ~ 1
~ I I ~ I ' ~ z 1021792 v s ? I' o o I LI 1T F DISTURBANCE I I ' III ti ~ ZONE NC & RD ~ ~ ~ ~ ~ i ONCE ~ DA = 0.095 AC. ~ I ~ ~ I / ~ I I
NORTH ALLEn~ I I ~ ( ) I DOWN ~ USE- R SID TR1E PROTEdTION ~ (n I ~ I ; I , ~ ENTIAL N ~ ~ ~ DIVERfED~ f0 54 I Z 1 „
~ \ ~ I I NIG F~ ~ 1 CULL#TS. ' I 2-54 RCP CULVERTS INLET. Wrenn En ineerin 9 9
v ~ - I I i. I ~ ~z- F/J-B WIATERSHED ~ Z x W o,.,-, C AR RIVER ~ASIN ~ I I III N? z \-ti..-„ ~ ~ l I MITERED HEADWALL ELEV. 260.00
V > - I ! I' ~ „GRAN L "G" EX. (GRASS ,N-SH E u~i 4I Q MAGNETIC (P.B. 44 , P.17)1978 I I ~ \ - ~ Q ur I I SLOPE ARfES., ,D~T1-j,V'P,RIES. p i~ ~`i I Civil En ineerin 1 I 8 X 20 RIP-RAP MAT 9 g ~ ~ ~ / I Land Plannin
z I l i ~ :five t ~ m _ y O i 7 m ~~~.~a Fi: r / I d50=9 , d= 23 , LINE W/ FABRIC. 9 I~ / / I Site Desi n
~ ~ - J - ri ~ I 0 ~ , ~1 FLOW - ~ / $ I / 1 9 \ / I - / / t
Sete I I I m FLOW ~ 41 E R / I
~ I I I' REMAIN FLOW ' r- - - 6 .5 \ \ o~~ / l / CHANNEL "E" , \ o ~ ~ t WRENN ENGINEERING CO.
LIMITS OF DISTURBANCE & r I I ~ ,:r. rc,. ?4 I I ` oU~ ` 1.5X I TREE PROTECTION FENCING. ! ~ I II I b~.'.:t r~rL._ M;. yS 1.5X S (GRASS V73'HAP \ ~ ¢ ~ / / / LOPE E I • S.S.- 3i1 - ~ ~ I v m / / I 1910 SEDIMCK RD.
t ~ I 4cQ fi OW F~ow ~ D s ~ e / / / / / LIMITS OF DISTURBANCE su~rE Zoo-c
o ~ I , , "r fly... ~ SILT FENCE TO HERE i I I I ! I a ~ ~ I i ~ _ , F l l DURHAM, NC 27713 Low ' \ VEGETATION ~ ~ ~ ! & TREE PROTECTION
PROTECT CULVERT FES. I I i h; I ~ r,~~,.~ o~' i I iI ~ TO REMAIN / / FENCING [phone] / VE ATION / ~ I [phone] fax
I:~1I z i I ~ I ; ~ EX. HOUSE A ar~6~'`-h / OFFSITE DRAINAGE i I I ~ ~ ~ r i ~ ~ ~ ; ~ \ ~ ~ R / / WWW.WRfNNfNG.COM / / ~ / T REMAIN
r l I I t9" ,I:~ / L< AREA OSDA-F i I I ~ ~ " / ~ / I
I ICI DA = 0.013 AC. ; I j ;24"_ ; a. \ ~ i / SILT FE ZE TO HERE / ` 2~•5' OFFSITE DRAINAGE A J F(~, I / ;f I / ~ TIE,iO HEADW L~ \ • 2s I / / AREA OSDA-E+D
~ i ~ I I I r~ r`~`r^ BLDG. _ A \ r,ti , ~ Q GOES TO POND. ; , I I ~ ~ ~ ~.I _ ~ AoDmoN , 1 L~ ~ ss ~ ~ ~ / / ~ I 2096 AC.
~ ;l I ; \ ~ \
I- V>,carut Map 1 -1000 ~ ~ , _ , r ; ; r t' I , I f I ~ T, DE ~J i NEL ~ ~ A / I ~ ~~sf 1, -6' BERM I 1 (
i r I I j I ~ ; ' ~ PLAtd DROPOF) f ~ ~ ~ v, I ~ f ~ ~',I ~ODX ~ I ~ ~ ~ ~ _ / \ \ I / ~ I - - 1 I I ~ _ / ~ ~ l J~` \ ( / F PIPING OF INTERMITTENT STREAM
• I, I I j I ~ GRAVEL ,DRIVE/PARKING , ~ i' Seeding Schedule for Slopes 3:1 or Less ( Q °F c>RauEi ~ _ ._¢"_CA$C 3" 57 \ ~ O i ~ i a 11 LT FENCE TO HERE. I ~ I II ~ ~ / ~ ~ AND REMOVAL OF STREAM BUFFER.
._C- ~ I - - ~ ~ ~ i I - _ Fall venter rin Tem orar Cover Au ust 15 Mo 1 r ~ 25' X 50' GRAVEL v_ - / /SP 9 P Y 9 Y I I 1_ ~ ~ ~ ~ I "r TI TO P~EADW L. f I I ~ I _ ~ ~ ~ ~ ~ 438 L.F. OF 2-54 CLASS III RCP
CONSTRUCTION E~NTRAN E i Lime 100 Ibs/1000 sf / ~ I I ~ ' ~ ~ _ _ / / _ ~ , _ _ ~ CULVERTS AT 0.913. CULVERT
I I CHANNEL \ ~ ~j - 10-10-10 fertilizer 25 Ibs/1000 sf { I ~ ~ - - - _ ~ , , I I I ~ I i ) J I ~ / BACKFILL TO BE STRUCTURAL / 1 I ~ ~ I / l
2Ibs loon sf %I I F ~ v DEPTH- s' v I ~ ~ - oat Seed / SILT FENCE TO HERE. I w 1 Rye Grain Seed 1 Ibs/1000 sf TIE TO SLOPE. ~ j ~ 1 m OCK CHECKDAM (E~t ANENT) ~ / / I I " " CONTROLLED FILL TO 15 EITHER ~ I / I C NEL D TRAP.} \r' I .h1 SIDE OF CULVERT CENTERLINE.
Straw Mulch 100 Ibs/1000 sf i I - CH NEL F (TRAP. \ - - - _ - _ - I ~ 1.0 e S E, .S.- 40:1, I
LIMITS OF DISTURBANCE ; I I _ 1.0% SLOPE, S.S.- t, „ ; - / / ~ ~ ~ STREAM BUFFER IS REMOVED. C~~-~-~ / / wl 6 , THE 3". ~ ,,,.«,n,, g a ~ / l ~ l I I ~ ~
Summer Temporary Cover May 1 -August 15 I I ( I DE ARE , ~ / l ~ l 1 l I v~~~ n
Lime 100 Ibs/1000 sf ~ ; I I I - \ ~ m _ ~ . 10-10-10 Fertizer 15 Ibs 1000 sf I I I I ~ ~ CHANNEL
/ _ ~ i / I I f I CHANNEL\ \ „ Browntop Millet Seed 1 Ibs/1000 sf I ~ I ~ „ DEPTH- 12
Straw Mulch ' 100 Ibs/1000 sf / I ~ DEPTH- 1~ \ ~ - I I d~ w \ ~ / ' ~`.i I ' / /mil f' l ~
I f _ ~ ROCK \ ~ / ~ ~ Spnnq/Fall Permanent Cover March 1 -April 30 ( I I = 3 1 \ „ ~ ~ ~ / I ~ 3 1 SLOP ~ l I I 1 ~ \ ,i I 1 e~~ I I 1 ~ ti
i - CHECKDAM 7 L.F.- RCP W/ 0-RING RTHEN~BERM August 16 -October 31 ~ ~ r I - F - ° PERMANENT TERTIGHT ASKETS ~ 1.0% UP- OP WIDTH= 3~ 3ERM ~ i I I I -LOPE \ << I 1 F I- 3 I S ~ , @I'
j II - ~ 25 . ,DOW 253.53. SEE I Lime 100 Ibs/1000 sf ( I ~ = z / / l ~ ~ I ti 1 , / I ICU / / ,:.1 MINI
w \ DETA SHEET NOTE BELOW. 10-10-10 Fertilizer 25 Ibs/1000 sf j j I I I = \ z V ~ / C NEL "B" (TT2~.) 1.0~ (rw~.} 1.0~ ~X ~ I i I 1 \ v ~ f I / 'i ~
Improved Turf Type Fescue Seed 7 Ibs/1000 sf _ L ~ I „ ,f ~2, I I= ~ POND PRI Y SPILLWAY ~ SLO S.S.- 3/l, W- 4 3/l, W- 4~ / ALLY AREAS rEXCE T IFOR S~.D. \ \ l ~ I I N ~ ~ C \ I op
Straw Mulch ' 100 Ibs/1000 sf ~ j r 1f2 2 1~4~ - o: '~1 4'~ PP~ .H. DEPTH IES! I j w U ~ I I ( k , ; RIM- 259.10', .=-254.0' ~ MT M FI P I S., BEES S, L I SLO ~S, I ° ~ \ i I
Seed tem orar cover to stabilize tem orar sedimentation control II - \ f p y P, y SILT FENCE TO HERE. 1 ~ I ( = SEE DETAIL SH ST W & NETTING TIN I lo`~ / / AND CHANNELS T 1BE \ \ I 6 I G ~ / } i I I N F / / / REFORESTE WITH GRICULTU \ DRaNAC BASINI I o
measures and other disturbed areas pnor to final groding or if j !I I I = j I II I \ CHANNEL planting season is not suitable for installation of permanent cover. TIE TO CULVERT FES (OUT2) i I i I - \ \ EPTH- 15" ~ " ~ / ! P I BOUNDA DD ~ I
Seed permanent cover when final grading has been accomplished. j f II I D PINES AND STABILI EDVNITH I l ~ o / I i \ ~ I I 3 P (0 1} ( PERMANEN GRASS GRO D \ I I \ I TURF REINFORCEMENT ~ ~ d.
CHANNEL A (GRASS V-SHAPE) W/ CURLED II I = ~ ~ / ~ \ I o ~ - 54.0 COVER TOP ENT EROSI .ALL \ III \ MATTING RATED AT 8 ~ ~
OOD MATTING. 1.0~ SLOP . - - ! I ( I + I= Q ~ 1 ~ ~ W E S.S. 2:1, D - ~ I I I _ o O ~ ~ ~ ~ / J I ~ ~ ' I LB1S.F. SHEAR, o I ~ 31~ ~F 3s"I \ AREAS TO BE TABI IZED WITi~. \ III ro za~ DEPTH = p ~ ' •
24 . LINE FIRST 10 OF CHANNEL W d50 = ~ I ~ I ~ I= z • / / I I w ~ RCF 9" RIP-RAP D=23" FABRIC. ! I - _ ' ~ I I I I ~ I RCP 12.93: SS GROUND C R. \ <; I a r\ _ ~ I N W ~ I
! ~ I ~ N EXTEND E sTRAi I I 1 R I RI T T \ \ ~ ~ o o a I TRAw N NG ED ST BU E ALL 0 E \ \ ) I ~ s ~ I l TOPS01~. v ~Il P
_ ;II,I I ~ I TRANSITION POINT IN CHANNEL FROM RIP RAP ~ ~ ~ I I ET. YCB- YCB-1 W/ INLET PROTE N,-~ \ ~ ~ ~ I I t;RAp Q ? o ~ \ 1 T z. E
TO EXCELSIOR MARRING. I O UT 14' x it I 1 ~ - - 14' X Y IN ~ I I I U4~ \ I I 1 ~I I I
I I ! ~ ~ ' d ,s;'°~ /RIM- LINE EMERGENCY SPILLWAY WITH TURF f ~ ~ , , \ INV._ /RIM- 61. TO - 261.93', I \ I I 1 1 I Z \ INV.- 57.b . 4 IDES OPEN. ~ LIM OF DISTU BANE $ ~ I I XSECTION CHANNEL "A" (GRASS VSWALE)
REINFORCEMENT MATTING RATED AT 8 LB/S.F. ' j t Z, ry TOP I - ~ ~ I /I \TOP T FENCE 262.1 TREE P OTECTIO CING ~j~ ~ Q ~ \ ~ fI .
SHEAR. SLOPE = 12~. ~ .I ' ( ~ f . n O,q,M ~THtfd ~ I I; I I eu 7 » „ I ~ 2~, 8~ F STRAW 8 NETTING = ~ ~ SED~MENT BASIN A \ \ IN F
SEE DETAIL SHEET. ~ I ' I SEE bETAIL SHEET. \ \ I I 1~ 4 h TO 6' DEPTH WHERE ~ w I I " " \ / I p / ~ SHOWN ON PLANS. o
SILT FENCE & TREE PROTECTION FENCING AT / I I I I I a. m SITE AND EROSION CONTROL NOTES: LIMITS OF DISTURBANCE 8C FOLLOWS STREAM R+EADW LL I i I _ ~ ~ F ci~AANNEL c (TRAP Y ~ ~ I / ~ / ~ ~ I ( I / ~ ~3.0'~ 1.OY SLOPE, S.~:- 3:1, ~ ~ ~/I 1 ~ I NATO 3~~ 3~1
,66'~ R / I I I ~ p ~ ~ ~ BUFFER. TIE SILT FENCE TO CULVERT FES. I I (I I W- 'DEPTH t8". I / 5 RC~ I - ~
a. Total disturbed area: 5.98aces. Via' ~ °i ` = \ ~ro G r L I I I I ; . _ k FLOW I \ j SILT FENCE TO HERE. ~ - / ~ ~•1 I I GRADE I ~ FLOW ~ / I / I ~ Z I EN BER Q J/( I I I I --I a.a f LL
Rp f , b. All tree protection fencing on this project is required to be installed and inspected I N 3 NA(~E BASINI I / I i t r Q TOP WIDTH- ~ I I I I X-SECTION CHANNEL "B" & "C" GRASS TRAPEZOID BOUNDARY II I III I ( ) W J
before the grading permit is issued. All tree protection fencng shall be maintained . ~ _ I ~ ~0 I ~ ~ . PL I Q. ~ r / (NOTE: DEPTH VARIES. SEE PLAN VIEV~ FLOW ` _ III I I
I until all site work is completed and the final inspection is scheduled. The fencing shall ~ . _ \ S I ~ I I 7 1, ~ ~--...;t~EGET.TI N _ . /1 ,l I STRAW d NETTING TO
be removed pnor to the final site inspection for the certificete of occupancy (CO). I - - ~ - _ _ _i, ~ S I - - - \ ( - - 70 RE _ . _ 70. RE _ _ _ _ . _ _ . _ _ / y / 3 DEPTH WHERE rya 0
c. The tree protection fence marks the limits of disturbance exceptwhere the limits of \ ( ! ~ R - ~ ~ I I I I I I ' I SHOWN ON PLANS. ° p ~ MM LL
disturbance line is illustrated withouttree protection fencing. I ~ ~ r~.~~. s.~.~,,_- f I ~ II A LL _ ~ ( I 6 - s, ^ I / i0 REMAIN ~ ~3~' _ I I I I I 10:1 I"'
d.Overla s: Jordan Lake Watershed FfJ-B I I I II ~ Y ( ) I r_ - _ 1~r - -
-_a•+.. I - ~ I i' I I FASE MENT ~ ' ` .,1_ . ~ J ~ I I I , I I 6.0' _NATURAL r- / I \ I GRADE
e. Establishment of permanent ground cover will be required within 15 working days ~ I I I ~ , 102 P _ ~ or 30 calender days {whichever is less) of last grading effort. ~ ~ I ! ~ ' 169 i i ' ,i-~ . - - I X-SECTION I i • / ~ ~ S I 1 I I PERMANENT CHANNEL "D" (TRAPEZO D) - ~ ~ , f.....~
I ~ I BENCHMARK I ! ~ ~ ~ - - - ~ ~ f I ~ I 'IIIII P _ ~ ~ YM ~ i ~ I M. . ~ I I N GRASS LINED
f. Cut or fill slopes greater than 3.1 requireapshaRemulsiontackingorhydroseeding. I I ~ SSMH R~M/ o~~ / 7 ~ I I Z N~ I I 1 1 - w 0
~ i , l ~ ~L- ~61Z.17 ~ ~ _ , - .S{L~FENCE TO HERE. ~ , ~ g. Apre-construction conference is required before any land disturbance takes place. ~ ~ r TIE TO HEADWALL. ~ \ SILT FENCE TO HERE. ~ ; I J r~> LIMITS OF/ DISTURBANCE/& I I I: NATURAL ~ - TI T A IN BERM. I I E 0 6 S , a m TR P~ TE TION F N IN I ~~o - ~ ~z.D'~ - (n
4a ~i Call the Count S&E Officer 919-560-0735 and Pro ect En meer 919-806-5082 at ~ ~ I I ` - , ~ EE >2 I it ? I E 3:~- ~ _ / / ~ I g.1 3_
least 48 hours in advance ofany land disturbance. Ensure that all interested parties / I ' w ~ J ~ - \ \ ` m . 'PE.@MANENT STO~M'DRAINAGE - ,2-54"-Reps & HEADWALL, INV. ELEV. 256.00 I , r ru / / 1 I ~ , ~ w ~ ~ 8' X 20' RIP-RAP VELOCITY DISSIPATOR / I =
have adequate notice of pre-construction meeting. Referto construction sequence. 1 I I ~ r \ ~ ~ ~ F ` o ~ ESMT. GRANTEE TO NCDOT FOR / - / I ! I I I I II i X-SECTION CHANNEL "E" GRASS V-SWALE Q t!? W d50 9", d- 23", LINE Wl FABRIC. / / t I ! PA ( ~
I ~ NEW CULVERT INSTALLATION. RESEARCH LAND JOINT VENTURE J \ / ~ I l 1 1 II ~EtIQ STREAM BUFFER TO BE REMOVED ~ / 1 I.i ~ - _
1 I3 ~ \ PIN 738-03-00-8432- ~ I ~ - ~ / T.M. # 541-02-001~ / 1 ~ 1 1 1 if \ N TO THE END OF PIPING. I
EROSION CONTROL CONSTRUCTION SEQUEHCE ~ ~ - \ 1 DB 17621535 B 1021169 ~ l 1 l%I I I CRASS uNED ~ w _ / ! I \ ~o ~ _ ;
I ~ ~ v \ I ZONE (NC & RD ~ i ~ / I / I I f~ I \ 3: ~ 1D.D' BERM --I 1 ~ / j S 1 NATURAL 3'1
PART ONE- Before Pre-Construction Conference 3.5 Before beginning any mass clearing or grading, inspect all the measures to ensure they are built and ! \ 1.10btain a copy of the Approved Erosion Control Plan. operating correctly and then call for an onsite inspection of the sediment control devices and site by the \ \ I USE- VACANT ~ - ~ - GRADE - _
Project Engineer (919-806-5082) and the Durham County Sedimentation and Erosion Control Officer ~ ~ F1J-B WATERSHED ` , ~ ' - ~ ~ I I I ~ 4.0' / I I I I I ' 1 _ v
1.21nstallall Orange Barricade Tree-Protection Fencing and notify Project Engineer (919-806-5082) (919-560-D739). The site should be ready for clearing and mass grading once the site has been inspected \ / CAPE FEAR RIVER BASIN / ~ and Durham County Erosion and Sedimentation Control Officer (919.560-0739) v,~hen rt Is by the County S&E and the Project Engineer. ~ I I X SECTION CHANNEL "F" (GRASS TRAPEZOID) v
completely installed for inspection. Have surveyor stake out tree protection fencing to ensure that it
is located properly. 3.6 Begin clearing the site once the sediment basin and temporary sedimenttrap are installed and inspected and the twin 54"culvert is being laid. Begin grubbing and grading the site as the culvert laying f
1.3 Do not disturb the site et. ro resses. Do not et ahead of the culvert la in with an rubbin radin or other land disturbi 1 Y P 9 9 Y 9 Y 9 9, 9 9, n9 activity and ensure that the stream, stream banks, and area within 5' of the stream banks are not disturbed N
PART TWO- Pre-Construction Conference at Site until the pipe laying progress demands that it be done. Z.
2.1 Contact all parties interested in attending the Project Pre-Construction Conference to discuss the 5O' project and erosion control plan in order to schedule a date that all can attend. These include, but 3.7 Ensure that the erosion control measures are properly stabilized and maintained so that sediment > > > 50 0 50' 100 150 ~ .~r~
are not limited to the followin artiest Project owner or representative, Durham County Erosion does not contaminate runoff as it leaves the site. Install any remainin sift fence, tem ra diversion 9 p 9 Po ry - ~ r~
Control Officer (919-560-0739), Project Engineer (919-806-5082), Grading Contractor, City of ditches, or other devices that are necessary to contain sediment onsite and out oftiie streams, adjacent Durham Engineering, Utility owners, etc. properties, and public right of ways. > ~ SCale 1 = 5d p o 1 '
y
2.2 Notify all interested parties of the agreed upon Project Pre-Construction Conference date and 3.8 As work proceeds, inspect all measures after each runoff producing rainfall event to make sure they time. Allow at least one week of notice before the scheduled conference date so that all can attend. are functioning as intended and make any necessary repairs or modifications. Ensure that all site ;~1 2~
generated runoff is directed to one of the sediment control measures. The site should always be protected ZQ ti
2.3 Attend the Pre-Construction Conference to discuss the project and the erosion control plan. from sediment leaving the site. As the site is brought up to grade, redistribute topsoil and begin The pasty responsible for the installation and maintenance of the erosion control measures should stabilizing the cut 8 fill slopes with straw and grass seed in orderto minimize the erosion ofany slopes due ~ O q.
become thoroughly familiar with the approved plan before attending the preconstruction conference. to prolonged exposure.
The permit will become active at this time. 3.9 As the earthmoving operation progresses, inspect all sedimentation measures and clean out sediment 0 Cz
2.4 Install a rural type mailbox marked "PLAN BOX" at the location near Hwy #55 on the right side of from the measures as necessary to ensure that they continue to perform as designed. Ensure that Hwy ROOTZONE PROTECTION AREA= AREA
the gravel construction entrance (facing the project site) as shown on the plan. This will provide a 55 and other public roads are kept free of debris and sediment and sweep as necessary. dry location for keeping a copy of the approved erosion control plan on site, as well as a place forthe MEASURED IN FEET RADIUS FROM Senlor Engineer
erosion control officer to leave copies of site reports for the Owner and Contractor. The flag on the 3.10 As the site is stabilized with grass and straw cover, install the remaining channel linings as shown to THE TREE TRUNK EQUAL TO THE EROSION CONTROL LEGEND . WR NN K E TRUNK DIAMETER IN INCHES & IS
plan box should be raised by the Erosion Control Officer to inform the Ov~ner and contractorthat ensure no further erosion from concentrated flows. there is a report or correspondence in the box. NO LESS THAN 6' MINIMUM RADIUS TREE PROTECTION FENCE Drawn By:
FROM THE TREE TRUNK.
PART FOUR-Site Stabilization STORM DRAINAGE PIPING DATA PART THREE- Installation and Maintenance of Erosion Control Measures 4.1 Graded slopes and fills are to be planted or provided with protective cover sufficient to reduce erosion UP TO DOWN UP INVERT INVERT PIPE PIPE IPE LIMITS OF DISTURBANCE K. WRENN
3.1 Before beginning any land disturbing activity, post the Land Disturbing Permit and a set of the within 30 working days after the completion ofany phase of grading. All areas upon which no further land IPE x
Approved Plans in the construction site trailer oroffice. disturbing activity will be undertaken are to be planted or provided with protective cover within 15 working STRUCTURE RIM UPSTREAM DOWN LENGTH DIA. IN LOPE days or 3o calender days (whichever is less). 2-54"HEADWALLS 260.00 260.00 256.00 438.0 2 X 54 0.91 N LOPE ~ ; ~ SILT FENCE ISSUE Tu"~°~'.~, I Dlv~ Dlv~ N0. DATE DESCRIPTION
3.2 Begin preparing for the land disturbing activity by installing the gravel construction entrance and ~~4 0.91 -~:3.., DIVERSION Dw~ ~ r> 1 11 3 CONSTRUCTION REVIEW
silt fence in the area of the driveway and below the master sediment basin. Install the pond primary 4.2 Maintain all erosion control devices until directed to remove them by the Durham County Sedimentation spillway and channel "A" below the pond spillway. Stabilize the channel with rip-rap and cuded and Erosion Control Officer. OUT-1 TO YCB-1 261.10 258.00 254.00 31.0 36 2.90 DITCH 2 12 1 04 CONSIRUC110N REVIEW 5
wood matting and tie the silt fence to the 30" rcp fes as shown. Install the silt fence below the 2.90 GRAVEL CONSTRUCTION Z3 ~ ROOTZONE CITY OF DURHM
temporary sediment basin. 4.3 When construction is complete and all areas are stabilized, call foronsite inspection by the Durham County Sedimentation and Erosion Control Otficerat56o-0739. OUT-2 TO RISER 259.10 254.00 253.53 47.0 24 1.00 PROTECTfON EX. TREELINE PROP. TREELINE STREAM BUFFER ENTRANCE 1.00
3.3 Once the pond spillway is completed, choose a period of dry weather and begin clearing the area
ornund The ced{ment h~cfn and a.,.V will of+ho h.dn FA" r~~ ri J..edc Immerliefehr henin ucinn the d d It the rife is ~nnrnuerl mmnve the temnnr~nr meeairoe end eeed nwe nr nn_r~n 4he rocs dfinn IAII FT PR(1TF('TIf1Al ~
pond spillway and master sediment basin by diverting runoff to the basin as the pond dam and berm disturbed areas as required. Make the necessary modifications to the extended detention wetland pond ,v • r DATE DRAWN FILE NAME
is constructed. outlet once the site is stabilized so that the permanent function of the pond can begin. Clean out the RIP-RAP
permanent extended detention wetland pond and grade the pond to design elevations and volumes and 3.4 Install the twin 54" endwall and rip-rap mat and tie the silt fence to the endwall on both sides. revegetate the constructed wetland as shown on the approved construction drawings approved by the city
Once the twin 54" endwall is installed, begin laying the twin culverts. The stream crossing is of Durham and NCDENR. Install the inlet protection at YCB-1 once the site is seeded and strawed and PROJECT#; 03101.00 CHECK DAM
provided at the first laid section of pipe. Begin clearing the area east of the culverts for the channels are lined leading to YCB-1. This will prevent large amounts of sediment from entering the permanent berm and temporary sediment trap. Install the temporary sediment trap and stabilize the extended detention wetland as the site draining to the wetland becomes stabilized with a good stand of LIMITS OF TREE PROTECTION INTERMITTENT SHEET SIZE: o- DSIZE FENCING STREAM
outlet with rip-rap as shown by tying the rip-rap to the endwall rip-rap. Divert the runoff to the grass. The channels near the inlet protection will require periodic sediment removal as site stabilization is OFFICIAL
temporary sediment trap with the permanent berm. achieved. TREESAVE AREA SYMBOLIHATCH SEDIMENT BASIN SKEET
4.5 When vegetation is established, call fora final site inspection. OF
KEY C3A

TOP REBAR RING WELDED HANDWHEEL ACTUATOR FOR OPERATING CASE # D03~58
TO BLIND FLANGE. 4" DIP FL-PE WALL COLLAR NOTE: ALL FEROUS COMPONENTS ARE TO BE NOTE: ALL FEROUS COMPONENTS ARE TO BE :NTS ARE TO BE BOTTOM DRAIN VALVE. PROVIDE BRACKET TO NORTH PIN: 0738-03-01-8050 VSIDE ANO STABILIZE RISING STEM. P2fCel-I D: 541 -02-002
ANCHORED W/ HIGH STRENGTH FULLY BITUMINOUS COATED INSIDE AN OUTSIDE. FULLY BITUMINOUS COATED INSIDE ANO • • • PORTLAND GROUT. 6"~ X 1/2" STEEL PLATE OUTSIDE. 4.90' INSIDE ~ X 2.5" X i/4" STEEL BAND FOR MOUNTING TRASH RACK TO
FOR WELDING REBAR T0. ~;-t ~ 0.5' I---) NOTE: SEE DETAIL AT FAR RIGHT FOR DRAIN GHT FOR DRAIN 30 CONCRETE MANHOLE. 8" FLANGED DIP EMERGENCY DRNN PIPE AND 8"0 FLANGED 4" DIP DRAWDOWN PIPE WITH 2"~
• • 4" DIP FLANGED 1/2" REBAR TRASH RACK. NO CLEAR ORIENTATIONS RELATIVE TO EACH OTHER. LONG RADIUS ELBOW. ACH OTHER. 48"0 CONCRETE PRECAST MANHOLE WITH PLUG VALVE W/ RISER ROD & RESTRICTER PLATE FACING EAST.
• • 3D• OPENINGS GREATER THAN 8". • 4" DIP OPENING. EXTENDED BASE. PROVIDE DOMED TRASH HAND WHEEL. FACING NORTH. SEE DETAIL TO LEFT. RACK (NO OPENINGS GREATER THAN 8°) SEE DETAIL TO LEFT.
(HIDDEN) 2.5" X 1/4" STEEL BAND FOR WELDING REBAR TO AND FASTENING TO 48" MANHOLE. 24" NOTCHED WEIR EL. 258.6B'.- ~ EL. 258.68'. TOP /SPILLWAY EL. 259.10'.
ATTACH TO 48" MH W/ 1/4" GALVANIZED FACING EAST. WELD 1/2" REBAR LD 1/2" REBAR PRECAST HOLE TO RECENE 30" RCP. ° OVIDE OPENINGS ~ GROUT WITH HIGH STRENGTH PORTLAND
DETAIL- /TOP VIEW) SCREWS & LEAD ANCHORS 8" O.C. AS SHOWN TO PROVIDE OPENINGS 1 NO GREATER THAN 8" CLEAR. 4" DIP DRAWDOWN PIPE 8" CLEAR. w CEMENT GROUT. %
I 8.5" O.C. MAX. SIDE VIEW OF WEIR TRASH RACK. INLET W/ TRASH RACK ~ `~0.
- N ~ ~ NOTE THAT THE RACK REBAR IS • ° 4" DIP DRAWDOWN PIPE WITH 2"4 ~ 2.0 CD N ? 47 L.F. 30" CLASS III RCP ®1.00% W MODIFIED ITH 2"~ } BELL & SPIGOT MEETING REQUIREMENT / F Wrenn E n i n e e r i n
R STRICTER PLATE FACING N.E. EXTENDED AND BENT TO PROTECT 4" DIP DRAWDOWN PIPE WITH 2"~ U PROVIDE WALL ANCHOR COLLAR. ~ WEIR FROM DEBRIS BLOCKAGE. RESTRICTER PLATE FACING EAST. BLIND FLANGE W/ 2"~ ~ O EAST. g S O ASTM g g C76. PIPES SHALL BE CONFINED 0-RING RUBBER 65,50•
HOLE DRILLED IN BOTTOM ` INV. AT M.H.- 257.00' INV. AT M.H.- 257.00' 1~ INV. AT INLET- 256.00' 1/2" REBAR WEIR TRASH RACK. INV. AT INLET- 256.00' GASKET JOINTS MEETING ASTM C-443 AND JOINTS Civil Engineering r OF ASTM C-361. PIPE JOINTS SHALL BE TYPE R-2. 24" NOTCHED WEIR EL. 258.67'. Land Plannin
TO CONTROL INFLOW. SEE SIDEVIEW ABOVE FOR REBAR PROVIDE TRASH RACK. SEE DETAIL • 9.5" ' DETAIL n g
I.- ~I PROFILE. TO LEFT. • • 1/2" REBAR TRASH O.C. RACK CAGE. MAX. 2" ORIFICE TRASH RACK. BASKET REBAR TRASH RACK. FACING EAST. SEE DETAIL TO LEFT. Site Design
8" FANGED DIP EMERGENCY • • OPENINGS. WELD 1/2" REBAR TO SEE DETAIL TO LEFT. ~Y :
• • BLIND FLANGE AS 0~~ DRAIN PIPE AND 8"0 FLANGED • SHOWN. NO 5" WALL PLUG VALVE W/ RISER ROD W/ ` GED 30" RCP OUTLET PIPE. D W ( FILL MANHOLE W CLASS 3 CONCRETE SEE DETAIL TO LEFT. / 1 /
4" DIP OPENING. OPENINGS GREATER DETAIL- (SIDEVIEW) THICKNESS HAND WHEEL. FACING NORTH. - NTH. ; ` , a%:.. TO ELEV. 254.00' FOR ANTI-FLOTATION. o + ` • ' ° ~ USE LEAN PORTLAND GROUT INSTEAD DETAIL- TOP VIEW OF RISER WRENN ENGINEERING CO.
HIDDEN THAN 2". 4'~ DIP DRAWDOWN PIPE INV.- 257.00'. USE LEAN ~ ( ) PORTLAND GROUT TO 4" BELOW OF CONCRETE WITHIN 4" OF DRAIN SHOWING DRAIN ORIENTATIONS 1910 SEDWICK RD. ELOW
DETAIL- (BOTTOM VIEW) & AROUND VALVE FOR FUTURE PURE .83' VALVE FOR MAINTENANCE. SUITE 200-C REOUId~ VOLLIIE{ FOR EXTENDED DEIENTI011YlE1LAND
4" DIP DRAWDOWN PIPE INLET W/ 2" MAINTENANCE INSTEAD OF RESTRICTER PLATE & TRASH RACK. PouRING coNRETE FLUSH To TO MONOLITHIC EXTENDED MANHOLE BASE. DURHAM, NC 27713 BOTTOM ELEV. 251.60'. ELEV. FORENIY MAN roND AccuM voLUrE SEDIMENT POND INFORMATION DIMENSIONS E L EV [phone] BLOWUP SCALE i" 3'
TRASHRACK BLOWlJP SCALE i" = 1' TRASHRACK BLOWUP SCALE 1" = 2' VALVE. Bl NOTES: z~,~ e;al cc~a EMERGENCY SPILLWAY 16', 3:1 S.S. 260.0' [phone] fax
1. DURING CONSTRUCTION THE RISER WILL BE 4. THE EXTENDED DETENTION WETLAND WILL BE x/'00 ~ 6~ ° TOP OF DAM WIDTH 10' 261.0' WWW.WRfNNE1VG.fAM 255,00 522 1185 1471
SURROUNDED WITH WASHED STONE TO SERVE AS A USED AS A TEMPORARY SEDIMENT CONTROL BASIN CLEAN BASIN OUT TO DESIGN VOLUME AFTER SEDIMENT FILTER BEFORE THE WATER ENTERS THE RISER DURING CONSTRUCTION AND MUST BE CLEANED 24" NOTCHED WEIR EL. 258.68 z55.so 61z 1322 2376 ANTI-SEEP COLLAR N A N A 258.00 709 3613 3940
AND OUTLET PIPE. OUT, VEGETATED, AND OPERATIONAL PRIOR TO USE TEMPORARY SEDIMENT MEASURE IS REMOVED. AS A WET DETENTION BASIN AND BEFORE ANY „ 4~ 5~ RIP RAP DISSIPATOR PAD RIPRAP LINED CHANNEL
2. THE 4"0 DRAWDOWN PIPE, THE 24" WEIR ,AND THE PERMANENT BUILDINGS ARE OCCUPIED. 48 ~ CONCRETE PRECAST MANHOLE WITH EXTENDED 256.76 1306 5989 8556
X57 WASHED STONE TO ELEV. M~OUNTEDETO~EACHOOPENING TO PREVEENTTDEBRISRFROM 5. OVEREXCAVATE 12" DEEP ALL AREAS 4" DIP DRAWDOWN PIPE WITH 2"~ 257.aD 1x79 ezzo 10669 ANTI-FLOATATION DEVICE 4'~ X 1.81' 254.0' BASE. PROVIDE DOMED TRASH RACK (NO OPENINGS „ TOP OF RISER 48 MANHOLE 259.1
257.0'. ENCIRCLE ENTIRE ENTERING. THE OPEN AREA OF EACH ORIFICE'S TRASH ASSOCWTED WITH WETLAND PLANTING PLAN AND RESTRICTER PLATE. RISER WITH STONE FILTER. RACK MUST EXCEED THE ORIFCE AREA TO PREVENT FLOW REPLACE WITH ORGANIC TOPSOIL STOCKPILED FROM , GREATER THAN 8) ELEV. FOREBAY3 ACCUMVaLL1E
RESTRICT 8" BOTTOM DRAIN TO RESTRICnoN. sEE DETaLS. sltE. SEE SHEET wQ1. INV. AT M.H.- 257.00 6 1/2" DIAMETER AND COVER INV. AT INLET- 256.00' 10' "1A1NP0ND (c.F.l OUTLET PIPE INVERT IN 30" RCP 254.0' SPILLWAY EL. 259. (s.F.> , 257.50 1031a 156x7 OUTLET PIPE INVERT OUT 30 RCP 253.53
W/ CHICKEN WIRE (1/2" I"-1 0 3. THE 30" BARREL IS CLASS III RCP, MODIFIED BELL AND 6. OVEREXCAVATE THE MICRO POOL AND FORBAY SEDIMENT STORAGE AREA 10,298 S.F. 257.50'
OPENINGS) TO PREVENT WASHED SPIGOT, MEETING THE REQUIREMENTS OF ASTM C76. PIPE TO ALLOW I~OR2SEDIMENTATIONOWO DEIGN GRADE) STONE FROM ENTERING HOLE. JOINTS SHALL BE CONFlNED O-RING RUBBER GASKET zs6.e1 12001 ze635
JOINTS MEETING ASTM C-443 AND JOINTS OF ASTM C-361. PIPE JOINTS SHALL BE TYPE R-2. 10.00' 2~'0° 12111 32762 zeo.oo 14091 a5eea
3• ~1 1j,,,,~ DAM EL. 261.0' 16' WIDE EARTHEN BROADCRESTED WEIR
- EX. GROUN I - D EMERGENCY SPILLWAY ELEV. 260.0'. LINE 20 L.F. OF DITCH
- _ - I-_ , ROFILE (VARIES) - ,I ~ = -~~c1 , W RIP-RAP. BRING 3~,a~ •1 - I .,I~, 30 RCP FES /
- - -----SEDtME~fT- SiOR~E To--ELfV.- 257.5'_.._.. - 3. A - _ _ _ - I RIP-RAP UP TO ELEV. - _ - - . • 1 ELEV. 253.53. ; - _
- - 255.53'. SEE PLAN. ~ ~.p -
SEDIMENT STORAGE VOLUME- 13,323 C.F. 4. 47 L.F. 30 RCP ~ 1.00% W E - _ C) , s ~ ~ ,
- POND INVERT EL. 254.0' TI SECTION THROUGH STONE OUTLET FILTER - - TIGHT 0-RING GASKETTED CT N . - AF , , ,
- - - ~ v
C3A SCALE i" = s' SEE PLANTING PLAN FOR WETLAND PLANTING SCHEDULE FOR BASIN.
~ ~ - 1 - - I~ ~ ,
8" BOT. DRAIN & VALVE EL. 254.00'. - - - 30 RCP OUTLET 10.00 Ro
- INVERT EL. 254,0' CORE OF DAM TO BE SELECT LOW PERMEABILITY CLAY MATERIAL AND COMPACTED TO 98% DRY DENSITY. WHERE N
CORE IS IN CUT, VIRGIN MATERIAL MAY BE LEFT IN PLACE IF ~ o
so' MIN. CD8 SECTION THROUGH SEDIMENT &4SIN EXTENDED BASE OF „ NOTE: SEE DETAIL BUT SUFFIgENT TO KEEP 1. PUT SILT FENCE OR TREE PROTECnON FENCE UP C3A SCALE 1 = 6 PRECAST MANHOLE. CONC. FOR DRAIN ORIEN- .SEE DETAIL AT UPPER RIGHT DETERMINED TO HAVE ADE DATE CONSOLIDATION & 0 0
SEDIMENT ON SITE TO ENSURE CONSTRUCnON ENTRANCE IS USED. ~ , BASE EL. 251.60 TO EACH OTHER. DRAIN ORIENTATIONS RELATIVE 0 ~ I PERMEABILITY BY FIELD ENGINEER. I o ACH OTHER.
2. IF CONSTRUCnON ON THE SITES ARE SUCH THAT - - THE MUD IS NOT REMOVED BY THE VEHICLE TRAVEL- ~pI
. - LNG OVER THE STONE, THEN THE nRES OF 1HE 2"-3° STONE TO BE USED 25 OR W1DTH OF V1=HICLES MUST BE WASHED BEFORE ENTERING THE ' ~I~
EXISTING :;(SURGE STONE OR RAILROAD PROPOSED STREET, 5 FT PUBLIC ROAD. i HWY p55 .BALLAST): WHICHEVER IS . MIN P~ I 0 ~ ' ~ SPILLWAY SLOPED ®1.0% p ,~0 TOP OF DAM
GREATER. 3. IF A PROJECT CONTINUES TO PULL MUD AND DEBRIS r. ' ON TO THE PUBLIC ROAD, THE GOVERNING AUTHORITY ~ ~ 3.7 ~ 1.0' DEPTH EL. 261.0' ~ ~ ~
- ; > WILL CLEAN THE AREA AND INVOICE THE FlNANCIALLY - - - RESPONSIBLE PERSON AS INDICATED ON THE FlNANCIAL 1800 CU FT ACRE D ) ' WAY EL. 260.0' I "V' , A ,
RESPONSIBILITY FORM. NOTES: ~ / O o p 5 FT ~ ~ 2'7 MAX ~ '.1`. yff ~ p~° ~ U ~ ti. ~ ~ L
1. USE FOR DRAINAGE AREAS ~o o O _ ~ Q ~ 0 ,1:, 1r6': TRAPE_~I~~~AL. WkIR----------' V ~ ~
NOT EXCEEDING 5 FIVE ACRES. 12" MIN, o ~o 0 0 PLAN ( ) Q
2. EARTH BERM SHALL BE STABILIZED w/ SEEDING ACCORDING TO TRIANGLE SPECIFICAnONS. FILTER J_
CROSS SECTION FABRIC Q ' F
NEw coNSntucnoN 3. USE CLEAN COMPACTOR FlLL MATERIAL FOR EARTH BERM. 35' MIN. 15' MIN. _ PERMANENT SPILLWAY LINING. W _ LINE EMERGENCY SPILLWAY UP TO ELEV. _ 0
EXISTING ROADWAY ~ OVERFILL 6" DESIGN FOR SETTLEMENT 260.50' WITH TURF REINFORCEMENT
I SETTLED 21" t ef• TOP f_ 17 : ~f . , , Y MIN. - ~ ~e ,E~'- - -'~.",L--- MATTING RATED AT 8.0 LB/S.F. LINE J J POND EMERGENCY SPILLWAY SPILLWAY INSIDE AND OUTSIDE OF POND. - O
_ 6" MIN. - _ - . f~`Y _ - - 1' FREEBOARD II~II~II~II~I PERSPECTIVE VIEW Q
w, ~?i.~ a'~',.~,.. fTi_~r.--Y. ~r _ f - ,p o III I II II- II I r>>~• „s. ~ ~ I -111 ( ~ I I..._I I `III pot',y~ O ~ i :.~A~1,~' ;':e: ~-i n-III=III I I-I~~- = p"0 OQ qA
FABRIC UNDER STONE 1.5 FT - ~~Cp° 10 FT MIN Ots' ~I ~ II o= 2:1 SIDE W 0
1 =1 1-III= o o II- 'S, 5 FT ' I I -11=1I 00 ~ 0 0 0 o I I- ~ SLOPE MAX J ~ U
CDZ CROSS SECTION ~ ~'o o`~o og 00 GR,4VEL CONTRUCTION ENTRANCE MAX FILL oYk oo ~ ~ z
C3A ~1 FILTER _ ° 0` ~~8 1:1 SIDE SLOPE 0
~ FABRIC ~I=-III 1=_~- MAX NATURAL - I ~I O ~ll=--_-__._......__._.._...__..~-.-..._----' GROUND to -
3 FT 8' MAX. ' 0
MIN VARIABLE AS DIRECTED BY THE ENGNEER - - - r - - - W
NOTE: MAINTENANCE THIS DETAIL APPLIES ONLY TO YCB-1. INSPECT TEMPORARY SEDIMENT TRAPS AFTER EACH PERIOD OF SIGNIFICANT RAINFALL REMOVE SEDIMENT AND RESTORE TRAP TO ITS ORIGINAL
TOP OF SILT FENCE ELEVATION = DIMENSIONS WHEN THE SEDIMENT HAS ACCUMULATED TO ONE-HALF THE DEIGN DEPTH Of THE TRAP. PLACE THE SEDIMENT THAT IS REMOVED IN MIN. 12-1/2 GA.
262.10' AND 15 0.50' BELOW BERM. STANDARD METAL POSTS 2'-0" IN GROUND A DESIGNATED DISPOSAL AREA AND REPLACE THE CONTAMINATED PART OF THE GRAVEL FACING. -.---I-'- ~ - INTERMEDIATE MIN. 1D GA. I, ~ VARES Z LINE WRES ' f~
LEAVE INLET TOP BLOCK WORK LOW IN CHECK THE STRUCTURE FOR DAMAGE FROM EROSK)N OR PIPING. PERIODICALLY CHECK THE DEPTH OF THE SPILLWAY TO ENSURE IT IS A MINIMUM ORDER TO MEET REQUIRED GRAVEL C~4A 1EMPORARY GRAVEL & RIPR4P BASIN A" ~ 1.5 FT BELOW THE LOW POINT OF THE EMBANKMENT. IMMEDIATELY FlLL ANY SETTLEMENT OF THE EMBANKMENT TO SLIGHTLY ABOVE DEIGN -I ? - SI FENCE F RK; IN AILED TO COND = I°°,
FILTER THICKNESS. TEMPORARY INLET GRADE. ANY RIP RAP DISPLACED FROM THE SPILLWAY MUST BE REPLACED IMMEDIATELY. GALVINIZED STABILIZE THE EMBANKMENT AND ALL DISTURBED AREAS ABOVE THE SEDIMENT POOL AND DOWNSTREAM FROM THE TRAP IMMEDIATELY AFTER
TOP ELEV. = 261.1' MAX. HARDWARD WIRE C3A coNSTRUCnoN vaTH sEEaNC. _ CRADE ~ F" - LLI
EXTENDS TO TOP OF BOX ~ / J LiJ
J Q ~
CULVERT & F.E.s. FRONT VIEW
~ TOP OF SEDIMENT STORAGE a ELEV. 260.50 {SHADED AREA {
WITHIN DASHED LINE) STEEL POST
MELDED HIRE FABRIC ti
/ / / SILT FENCE GEOIEXTILf FABPoC
/ / TEMPORARY SEDIMENT BASIN "A" ilO.IE. ~ -USE SILT FENCE ONLY WNEN DRAWAGE AREA o p 1
/ / LOCATED EAST SIDE OF DOUBLE 54"CULVERT. F.E.S. RIP RAP LAYER z DOES NOT ExCEED 1/4 ACRE A11D NEVER IN M 3 Fu s<aPE ~ r, (SEE PLAN FOR Z J AREAS aF CONCENTRATED Flow c`0v i ~ FOR REPAIR pF SILT ~ •
YCB-1 / - - / DA- 3A7 AC., DIST. D.A.- 2.85 AC. FLOW RIP RAP CLASS) a L a 3 FENCE FAILURES, USE ~.J J W -END DF SILT FENCE NEEDS TO ~ TURNED UPHl1. a Na. 57 WASHED STONE FA.
~ / REQ. VOL= 5,130 C.F. (1,800 C.F.IDIST-AC.IYR.) - GRADE FOR ANCHOR MNEN SILT ,'JJ ~ D W - ~ ~ ~ ~ FENCf IS PROtEC11NC L ~ W CATCH BASIN. Z
/ REQ. S.A.= 0.01 X 10.9 CFS= 0.109 AC. 4 748 S.F. R / c, ) F•) ~ ~ c B' MIN. COYER O r'
h / LENGTH TO WIDTH RATIO > OR - TO 2.0 ~ FILTER FABRIC SEE PLAN CD7 N ooER SKIRT' ~ P~ _ SILT FENCE ANCHOR SKIRT AS
(V J~ / / v BASIN DESIGN SA AND VOL DATA - • ~ " ~I PROFILE VIEW W qA DIRECIEDBYENGINEER ~ c`I ~ W `4h
J J / / ~ , ELEV. AREA ACCUM. VOL. SEE PLAN O ~ '1 SIDE VIEW
CD9 ~ 57 WASHED STONE PLACED TO A HEIGHT Q / ` INLET PROTECTION OF 12"-18" MIN. ABOVE TOP OF BOX 0 Q / 258.5' 465 S.F. 0 C.F. PLAN VIEW ~ k n CD5 RIP-RAP APRON
V / C3A Q- / 259.0' 912 S.F. 344 C.F. . n
/ 260.0' 2,342 S.F. 1,971 C.F. / qA Z Q N ti
/ 260.5' 4,639 S.F. 3,716 C.F. 0~~
/ 261.0' 4 965 S.F. 6117 C.F. / ~ , p .y„
MovE FENCE aR r~MO~E / Mo`~ FENCE / ~ 11' WIDE EMERGENCY REMOVE TREE IF MORE SEIXJENCE: TOP ELEVATION OF STORMWATER ~ Z
THAN 20A OF A TREE'S 1. OBTAJN APPROPRIATE PERMITS SPILLWAY ELEV. 261.0'. IBS lute oR7FC7TEO~A 0 2. HOLD A PRECONSTRUCnON CONFERENCE N11H THE LA~SCAPE PROTECnON SUPERNSOR, / ' _ 1 Max. g57 WASHED < Senior Engineer;
cTEO caxsrRUOnaN ARCHITECT OR LANDSCAPE ARCHITECT AND URBAN FORESTER. I / O-10YR = 10.9 CFS. A AREA 3. ERECT TREE PROTECTION FENCING / 4, CLEAR AND GRUB TREES AND SHRUBS TO BE REMOVED 2/3 W TYPICAL RIP RAP CHANNEL filg...?*.~._-_--..~_ - STONE' ^ C f'~ T r W I~ Tr~~ =1'.~ ~ ~ DESIGN OF SPILLWAYS N
5. INSTALL SOIL AND EROSION CONTROL MEASURES / C, I - T r' / '=i-7il B. ROUGH GRADE SITE / RETNN 7. EXCAVATE FOR FOOTINGS, INSTALL UTILITIES AND CONSTRUCT BUILDING [ - ~,r_~) ',I' ~ 1-fi"F; =i r~ I, ~ ~ :IL-; EXISTING SLOPE f:~_ _..~,1 K. WRENN
8. FM11SH FlNAL GRADING ANO PAMNG ~ I 9. REMOVE TREE PROTECnON FENCING ; 18" CFHTI R00 ZONE - d -i 1 ~ ~ l.u w ~ I DRAINAGE AREA WEIR LENGTHI Y[ :z Iii 18" ":I ~ I ;::I: 4° to 12" -I-~ ACRES) (FT) CLASS 1 RIP-RAP FILTER FABRIC ~ I ~ I 1 - ~r I: ( Drawn By:
10. INSTALL LANDSCAPING ~ _ / ~j B» MOVE \ 6» ' .1= I. 1 i ~ 1 4.0 VARIES - =j I ~°~-FlLTER FABRIC OR 2 6.° . ! ~ - K. WRENN
0 ~ OR REMOVE ~ , 0 TREE ~ ~ _ ~ L-.l Lam( J _ _ GRAVEL BEDDING FlLTER FABRIC OR 3 8.0 GRAVEL BEDDING 4 10.0
PARABOLIC-~ cRlnc zor~ o PARABOLIC-SHAPED WATERWAY WITH STONE CENTER DRAIN TRAPEZOIDAL i DIMENSIONS SHOWN AREiMINIMUM ~ ~SSUE
NOTES: (SHAPED BY BULLDOZER) N EXISTING SLOPES NOTE. NO. DATE DESCRIPTION
1. R00T PRUNE TREES TO REMAIN WHERE CONSTRUCTION ACTINTIES 'MLL SEVER ROOTS. 2. ANY TREE ROOTS EXPOSED BY CONSTRUCTION SHALL ~ SEVERED CLEANLY WITH A PERMANE PRUNING TOOL NT BERM TO BE USED WHERE EXCESSIVE STQRMWATER rr~_ HEIGHT & WIDTH DETERMINED BY ~ ~ ~ 3 O4 CONSTRUCTION REVIEW
3. DO NOT DISPOSE OF ANY CHEMICALS OR REMOVE SOIL OUTSIDE THE LIMITS OF WORK. ORANGE TENSAR I PLASTIC FABRIC OR QUAL 4. WHEN INSTALLING NEW LANDSCAPE PLANTS, DO NOT DRIVE EQUIPMENT UPON OR HE~IITH OF FE1M7 SH RE APPRO%IMATELY 4~ VELOgTIES PROHIBIT VEGETATIVE LININGS. ~I~" EXISTING TOPOGRAPHY AND 2 ~2 I5 ~ CONSTRUCTION REVIEW mil!:;- SEDIMENT STORAGE REQUIRED,
DISTURB THE SqL W9THIN THE CRITICAL ROOT ZONE OF EXISTING 1REE5. 5. AT THE START OF GRADING INVOLVING THE LOWERING OF EXISTING GRADE AROUND s' STEEL Pos 10 .SPACING MAYJMUM W SIZE OF STONE MUST BE DETERMINED BY !l'- VARIES T,~ V ~ ~ " l.S)~ Gd I T APPROPRIATE DESIGN PROCEDURE. In ~ KEY RIP RAP INTO THE DAM
A TREE OR STRIPPING OF TOPSOIL, A CLEAN, SHARP, VERTICAL CUT SHALL BE T' MADE AT THE EDGE OF THE TREE SAVE AREA AT THE SAME nME AS OTHER I ~ 1 I ~=t~ C,... I P=' _ i; ,I ;a ' f. FOR STABIl12A110N. i i.=-I r I :;fii~ d I I I I=_ I DIMENSIONS FOR d& W VARIES ACCORDING t if ~I.
EROSION CONTROL MEASURES ARE INSTALLED. THE TREE PROTECTION FENCING III, -I,I- SHALL BE INSTALLED ON THE SIDE OF THE CUT FARTHEST AWAY FROM THE TREE TRUNK_ AND-SHALL REMAIN IN PLACE UNTIL ALL CONSTRUCTION IN THE VIgNITY ~ ~ - ~ ~ ~ ~ ~ ~ ~ ~ ~ _ ~ lB"~ TO DESIGN. -TIT ~6"-i' _ _ ~ ° - - I 18" I~,r'i1,~ _ I I?'' ~ RIP RAP DEPTH AS PER DESIGN OR REFER TO r ~ lillf
,3. t, YIAICID
Ut IHL IKLLZ~ 1t~ UUMYLLIt NU WUKAUL Ut MAILKIALZ~ tiLLUK LUVIKMLNI F..11 i 6'~ AND NO TRESPASSING SHALL BE ALLOWED WITHIN THE BOUNDARY OF THE `L TABLE. 5" FILTER FABRIC OR . Q a '.Qp.,, Qua „yp Qp'
PROTECTED AREA. - y 6. THE ROOT PROTECTION ZONE IS AN AREA THAT COVERS V RADIUS FROM THE 'NO TRESPASSING NITHN TREESAVE AREA' SIGNS TO BE WWAU.EO ON TREE PROTECTION , GRAVEL BEDDING TABLE
TRUNK FOR EACH 1" CALIPER OF THE TRUNK. FENCING AT A MAIOAUM OF 75' O.C. 7. WHERE BOTH TREE PROTECTION FENCING AND SILT FENCING ARE REQUIRED, THE NPoTTEN IN BOTH SPANISH AND ENGDSH. V-SHAPE iE j F ¢57 WASHED STONE V-SHAPED WATERWAY NTH STONE CENTER DRAIN STONE CLASSIFICATION 1I RIP RAP DEPTH; PROJECT : 03101,00
TREE PROTECTION FENCING SHALL BE INSTALLED CLOSEST TO THE WOODLINE. 8. TREE PROTECTION FENCE TO BE MARKED EVERY 75 TO 100 FEET APART WITH (SHAPED BY MOTOR GRADER) A FRONT VIEW z~z:
SIGNAGE IN BOTH SPANISH AND ENGLISH SAYING "KEEP OUT" e a SHEET SIZE: D-SIZE (24'x36 CLASS 1 24
T" CLASS 2 24°-36" EXISTING sIGPE ` CD6
(CD3 CD4B TEMPORARY GRAVEL & RIPRAP BASIN A° TREE PROTECTION FENCING RIP-RAP LINED CHANNELS ROCK CHECK DAM STEP SEQUENCE - ~ SHEET ~
~CIA SCALE I" = 20' CIA CIA C A OF RIP RAP LINED CHANNELS c3A C3B~

.r
2-54" RCP CULVERTS INLET.
MITERED HEADWALL ELEV. 260.00'
HEADWALL & 16' X 8' RIP-RAP MAT d50=9", d= 23", LINE WI FABRIC.
, ~ ~ i ~ I( ~ l 1 'i 1 I
~ ~ 2 I~ ~ ' i I , ~ ; i ~ ~ ~ I I ~ /w~ ' ~ ~ ~ ~ z
(1 I ~ I I i J- 1 , ~ t ~ CITY OF DURHAM IMPOSED 100' ~ ~ .f•', I 1 ~ _ ~-^_.n,_;,~ ' , STREAM B FFER HIGH DENSITY '
i l~ I I i 1, s ' I ~ t ~ I I , I I U ~ ~ , 1; ~ DEVELOPMENT >24% & <70% j
~I~ it ~ PR ~ ~ • ~ 12" RCP STORM DRAIN i ! ;a _ i j " ~ ! ; , ' ~ IMPERVI ~ OUSNESS)
INLET PLANNED BY NCDOT. I ~ ~ : ~ CITY OF DURHAM IMPOSEQ 50f~ j j ~ i ' 7 ~ ~ f . ' ~ ~ r
! ` • ~ I ~ , _ ~ ° ~ ' ~ ~ STREAM BUFFER LOW D,~NSITY i ' , ` I I , ~ fi, 41 E 687 , ~ x ~ ( f .&5• v DEVELORMENT <24% , ~ I ~ I I + lI ~ ' . ~ VEGETATION ~ i ?iTRFESA ~~VEGETATION I ; AS TW FSITE DRAINAGE,' ~ 4 ru ! ~ ~ ~ l 1 E 7, \ ~ AR BE DIVERTED FfFOM
I ~ ~ `IMPERVIOUSNESS) ! ~ I ` I, i ; , TO REMAIN o (AR~A'C" ylvERSfoN TO REMAIN r' + • r ti pi ~ AI NG''TO EXTENDEO`• - ~ a t j ~s~ Wrenn En ineerin
i ~ ~ ~ Zvi r I I _ , J , It ~ ~ i \ ~ % I ' D TION ,WETLAND.i g ~ ~ ~ 8;000'S.F. r , . r"
j' I' ' , T~1:~SAV~, I Y ry i DNERSfON r"\ ~"'y,rr`„"" , i ~I i i ~ _ " U W i ~ ~ r~ I ~ i i f i AR~t A" ~ - a ,v ~ i EG ~ ~ ' BO NDA I I i' r - ~ Civi! En Ineerrn 'fir 1 a' ` ; I Bl11LC1lNG i , - r 9 4 - .
V EFAt U Y l I ' \ 0 ` N , =u i I FFE 264.5f} t TO, ~ ~ Land Punning i ~ ~ VEGfTA ' ~ ~PO~ 9
r~ ~ ~ ~ ,-;i; 0 3:1 SLOPES . t I I ' t~ I PARKI Lor ~ T10~: Site Desi n , . ~ ~,Q~q S.F ~i MAit~_ ~ , : , • ,
~ o: r ~ 8 to w (TYP.) E 285:5 i I ( I'~ ~ ~ ~ IA ~ ~ M .l `~V, r ! ~ ~A h t i ~ ~ ~ ~11lLDIfi1G ~ t
3IW ! j ~ ~ FFe FFE ' ,i PHASE 1 OFFSITE ! f • ~ . ( } DRAINAGE AREA TO 1+ ~ , , i , ' WRENN ENGINEERING CO. i -FFE 267::0:. d . '
z'~ ~ _ ~ 2sa.o' 2sa.a ~ CHANNfC~"E" GRA ~V-SHAPE , ~ < ~ " ~ 1,-.5'% SLOPE. „S.S,- •1, D= 6". ' I i 1' EXTENDED DETENTION ~ ) I _ I - ca .r. ~ .Y., . N , . i j ` ' '~Hi ~ ~ ~ f 1910 SEDWlCK RD. ~ PARKING LOT ~ . I N 1 . _ ~ ' ~ ~ ~ i ~ sui rE Zoo-C I
CNAN .E-L r' 6 BERM , ; .;~.;r.. WETLAND VIA YCB-1 ~ I 1 PHASE 1 OFFSITE , t'~' I ~ F~ARK NG rLOr z ~ DURHAM, NC 27713 j ~ i o
DRAINAGE AREA TO ' ; I ~AUE1,bRi}!~yygp ~ ~s „ DEATH- 9". ~ ^ _ ~ _ I t (0.210 AC.v SHADED BLUE. ~ ~ < ~0 ; . _ , ~ • 1 a , . , EXTENDED DETENTION ' ' ~ r : ti.. _ I ~ i ~ ~ -
WETLAND AND BYPASSING + ~ Eocr:-eFCr~ ~ GI~IUEL EL - ..w~< f I1 - s ,t I 44 _ ~~4. ~ ~ ~ ' ~ ' ~ > ~ 919 806 5083 fox _ ' , / l KEN. . ' ~ RIZON NET
YCB-1 (0.013 AC.) *.a CHANNEL` / ~ 1 I ~ ,,a'~ ~~o PIPING OF INTERMITJENT S ' - SHADED BLUE. ~ ~ ' DEPTH- 6". 1 r ' ~ ; ,AND REMOVAL OF STREAM.-BUFFER... „ , , RNE ACCESS ~ . ' +
I ~ ' , IK w . a . lc , ' I ~ ~ 438 LF. OF2-5M' C S III;RCP ~ - ' I ~ i ~ ~ ROCK CHECKED ` ~ PHASE 2 OFFSITE ill ~ - I ~ + ~ 1 1
I' I ~ j' CUL~IERTS AT 0.91,3%. CULVERT ~ • t ~ r ''SEE DETAIL .i ~ ~ . BACkFlLL TD BE STRUCT`l1RAL ; r , M1 1 ~ ' I CkiANNEL "F" T P.. t ~ CdNTROLLED FILL; TO 1~' EITH R j ~ DRAINAGE AREA DRAINS ; ~ ~ ~ ~ I Pi:~ ~ i i. f i
( ) ~ ( Fr I TO EXTENDED DETENTION .I ~ 1,0" SLOPE, S.S. 3:,)., ~ ~ I, I OF CULVERT CENTERLINE. f ' + ~ W r ! RAIfJAGE AR DIVIDING f STR FFER~IS REMOVED; ~ -a;::::: , ETLAND VIA , ~ ~ f.' , - - , i t , , ,
I 't-~ W- DEPTH VA IE~,"x~:, ~ ,Q- / ~ FOREBAY(0.028 AC.) ~r ~ r ~ I I ~ LINE (BLUE LINE - ~ ~ ' .I Gr ~ ' ~ ~ r~ : ~ ,i i ~ ~ 2 , ` PARKING LO~r ~ ~ ~ s I
II I I( ~ i ~ ,,j :.i.:;: SHADED BLUE. I I r . > I w ~ CHANNEL ~ , ' PARKING LOT o ~ QQ
I I ) PHA5 1 ONSI DRAINAGE AREA ~ ~x; ~ ~ p ! ~f 1 ~ w~ DEPTH- 12" , t. ~ r ~ POND PRIMARY SPILLWAY m` TO EXT~NDED D ENTIO,N ~ r' ~ ~ ~ O ; PROJECT SITE ~ ~ t ~ t ' t I E
4'~ PRECAST M.H. ! ~ ~ W AS IN - ~ ~ ~ I TOTAL ACREAGE: 7.361 AC. f ~ ETLAND `AND B S G , ~ ~ :r:.. ~ ' f
I = ~ A . EARTHEN BERM ~ ~ i` • - PIN: 0738-03-01-8050. I - . RIM- 259.10', INV.- 254.0'. FOREBAY 1.53 ) 47 L.F.- „ ~ ( ; , , : 1 )4-SLOE , ~ + 1 ; - 30 RCP W/ ~ ~ ,,TOP WIDTH= 3 , , 2 { M t ~ Parcel-ID: 541 -02-002. 4 i I , f ~ i 1 r i
0 RING WATERTIGHT GASKETS CHANNEL EXTEN ED D NTION WETLAND ~ i ~ ~ NIMU ~ • i.•::. I i 4 ~n •T ~ Parcel Acreage: 7.36 acres. I FFE 266.OD ~ Q~ _ ~ ~ ~ ,.r"c. ~ r ^ ~ N i.,G ~ i •~wl ~ _ ~ ~ ~ I P1~'
~ 1.0% UP- 254.0', DOWN- ~ ~ 1i t ` 12" DEPTH REQUIRED TO FSET THE o ; r PfE 1 pNSi DRAT ~AGE'~ AREA ~ r~! CH NEL "B" (TRAP.) 1. % i~ - ~ Deed Book Reference: 3666 1481. ~ I ~ - ~ ~ S 2 ONSIT i';bRAI AR ~ / , E I ; 'l 1
253.53'. SEE DETAIL SHEET. ( ! ; LOSS OF `STREA BUFFER TO ~ sLOP , S.S.- 3.1, w- ~ TO.' EXTENQED E ENTI N WETLAND 1' , f k Plat Book Reference: 44177. SATISFY BOTF+~.~OD ND y ~ I ~ r~ I ' I ! a DEPTH V s. - ~A FORE AY .1'07AC.1 U Ex. Zone: NC & RD ' . _ 16;000 S.F~~ r ~ ~ ~ k ~o : - X E ~ TI WETLA I _ ~
~ NCDWO._SEE BLOWU . s ~ i ! I I _ d : o
wETENTION STRAW & N G ~ , . ~ ! ~ ; Ex. Use: Vacant Residential { ~ DED D W~' , "ALL AREAS (QXCEPT F R S.D. / I 33' E LANG g(1FFF CHANNEL ~ r'' r' ESMTS., BERMS, FILL ODES, AND Cape fear River Basin. • 33'.EXTENDED DETENTION ' FOR R I/IEW ON Y. w _ ~ E L
( r~ p DETENTIO W~• ;DEPTH- 15" ~ ; i CHANNELS T`0 B R r ! FI - EXT E LAND ~ ) E EF RESTED WITH i J B Watershed. ~ ~ ~SEM t 3r 36' RCP ; , i r` AGRICULTURAL PINES A D STABILIZED i ! ' yI ~ S' ET~N~.. ~ i ~ ~ , ~ ti o ~ ~ ~ ~ ~ 3 NO ~ FOR CONSTRUC t10N.
I Q INV.- 25.4:p' r r' ,a ~ i WITH PERMANENT GRAS GROUNt~ ~ I : ~ ~ ` 1~ ~ I ~ 6' 'HIDE B M ~ r ~ " I~ ~ COVER TO PREVEidT ER SIGN. ALL . 1 ~ i ~r ' FFF y ~ ~ ~ PARKING LOT PA NT ~ ~ ' '
~ ~ CH4Nt~EL D"~ TRAP. ~ AREAS TO BE STABI6IZE WITH ) ' Y ( ) I 31 L.F. ~ : , ^7 I q M 1 .34,000 J.F. ~ / 1 i i r, DtN~ ~ ~
CHANNEL "A" GRA ~ ~ _ ,Q~~ 0 _ - / ~a;, ,'3s" RCP ' ` ILO% ~LDPE, ss. n aoa, 1sRass GROUND covER: , ~ ' i PHASE 2 ONSITE ' ( SS V-SHAPE} ~ ~ 0~ , / h~ ® 12 % 1 'w- 6 t DEPTFIr 6 . kw ~ . , J ~ I ' - r
W POLY NETTING. 1.0% P ~ ~ i r. ~ i DRAINAGE AREA DRAINS ~ / SLO E. ' ' TO EXTENDED DETENTION ' i w 1' CB-1 ~EE DETNL $HEEf) ; ~ ~ i S.S,- 2:1, D- 24". LINE FIRST ~ 0 ~ - ' I is i VJ ; ~ ~ ~ i a ,,y _ : . , I
, R€en ;!r„,,, x a' AROlINLET; 1 WETLAND BYPASSING 20' OF CHANNEL W d50 = 9" ~ I ,I ~-s~ O .u:~x"~~ ~1;~ ~ ~ / ' ( ~ Trl RIM- 2..t',,TOP-;26193', ~ f~,~ ~ ~ FOREBAY(0.453 AC.) i , O 0 Ord B- ~ ' ~ i u ~ I ' 2 ~ ,
RIP-RAP, D=23", FABRIC, ;'INV.- 2 .o'! 4 SIDES OPEN. I I I f ~ ~ , ~ ~ ~<<' ~ ~'I ( 4 I . • r. , - ~ 1 ~ ~~i h i ~ , 4 i.. fFE267.06 } a;
i r ~n , i ~ . I i i ~ , EARTH - ~D~ ~ ~ ~ ' I ~ ~ ~ _k~JV~I 1 r ~ n , EN , ~ NEN ,h ~ ~ s I I , , ~ i 2 1 , o ;
~ ~ (-1M EpRT ~ TREE PRO'f~CTION FENCING. ,f ~ ! I r I. i i 2&~:87 _ + ~ ~ SEE DETAIL •~~SHEET. i S, i ~ ~ 1 ^'~A; r, i 1 i r i i I; 1 ; ~ , :a,~ PARKING LOTI ~ _ ~i I
LINE EMERGENCY SPILLWAY I ! , )y~ ~ , sTRaw ~ NEFfI~G ' r t ; ii I ~ ' •4 C NEL "C" TRAP r ~ l I A ~ r
WITH TURF REINFORCEMENT I I , a .,~~.-1..- ti.\ ~ I ~ ~ f ~ ~ ~ \ ~ , \ \ 6 wIDE BERM ~ 1.D9 SLOPE, S.S^ 3.1, i , i I ~ ~ , ~ MATTING. SEE DETAIL SHEET. i ~ `tip' ` 't,, FLOW w- 4', DEPTHy IS". I r INy~; 5 RCP'`i' P ' ~ { q , ! f I ~ i \ 1 i I I I
~ 1 \ ~ r LIMITS OF' ~ ~ i1 i• X4.1 I I i ~ ; HEN BERM : ' I I I I~ ~ I ; A , ,v ~ ~ ~ ;F DISTURBANCE ~ I ; ' I ~ I , A A ~ f i ~ ~ ~ _ ~ t i'
, \ ~ , 1 \ ~ \ \ TOP WIDTH= 3r ~ ; ~ i ~ + , ~ ~ Il 1~ ~ lr, , I . , \ , ~ MA ~ ~ ,1 ~ I ~ r ti
~,r ~ ~ l ' L ' • _ _ . . - PARKING L R ql ~ OT n
. ~ , 4.. - ti , li ~ r 3 ! '
. , _ w i , , ~ r ` ' u • 1 . , F' _ p,--, GETATION ~F f } ,~,,~v ~ ~ r . fi0 RfMAI L
_....m _ - Tb REMAIN i • ° V / ' , I • , j ; NEW 66' RCP CULVERT TO 1 R JECT / O _ ON t VfGETATf ; ~ , ' , , ~ ~ , ~ ~ Y ~
BE INSTALLED BY NCDOT. , : I , - - _ ~ ~X - ° - _ - _ ~ 'STS, ~ ~ ; ~ i ' 1 i ~ ~ 0. ' I , _ ,r~
I i - ~ _r ~ ~ • • ENT ~ . , ~ I , 1 ~ _ ~ P-~ . - _ . ~ >~w ~ _ , ~ , , ~ ~ I W . EASEMENT : ~,qY ,J
~ , , p , P. 16 _ _ _ - . ~ - y P:B: 102, P. 169 r. _s ` ~ i I i _ . 'n,iV~ - S ,
~ ~ BENCHMARK,• ~ r.., , I r - S ~ ! BI SSMH RIM'' PERMANENT STORM DRAINAGE : ~ ~ i BENCHMARK,;' ' - W
C ' ' ESMT.~cRaNTED TO NCDOT„FOR- _ ~ ~ ~ I S` --EL---. -~6~:17 NEW CULVERT-INSTALL_ATIbN. ' CI SSMH RIM ~ ? ~ 'n - , ,
, _ ~ , _ I; , ._E~. -~6L.17 ~ > > ~.I , - . ~ l
MAGNETIC P.B.44 P.77 1978 ~ ' SURVEY INFORMATION: , - ; ! r i
Boundary and Topographical Information Taken from Puckett & Associates Survey. JURISDICTIONAL 2-54" RCPs & HEADWALL, Z
INV. ELEV. 256.00'. Additional Topgraphical Information Taken from Durham GIS Mapping. INTERMITTENT STREAM 16' X 20' RIP-RAP VELOCITY y-,~~ CONCEPTUAL STORM DRAINAGE SYSTEM TT LL
No USGS Monument UVithin 2000' of Property. BEGINNING POIN ~ ~ , ( ~ DISSIPATOR. d50=9", d= 23", 50 0 SO' 100 150 PHASE 2- CONCEPTUAL COMMERCIAL 50' 0 50' 100 150
LINE W/ FABRIC. DEVELOPMENT BRINGS 7.36 AC. PARCEL TO 70
Scale 1" = 60' IMPERVIOUS WITH APPROX. 64,000 S.F. OF BUILDING ANO 160 421 S.F. OF ASSOCIAT D _ LL
t E Scale 1 - 60 PAVED AREAS. ALL IMPERVIOUS AREAS ROUTED W
TURF REINFORCEMENT ATTING TO 24" DEPTH. TO THE EXTENDED DETENTION WETLAND. L
LBfS.F. SHEAR RATING. STRAW & NETTING ~ ~ ` r
b F TO 5' DEPTH WHERE ~ o STRAW & NETTING TO ~ ~ N ~ - SHOWN ON PLANS. N a N ~ 3' DEPTH WHERE d w GRASS LINED io w ~ ~ LL
-?I 3.0' ~ SHOWN ON PLANS. o GRASS LINED o D s
NATURAL ~ 3'~ 3:1 .....n _NATURAL I NATU _ 40;1 3 ~ 10.0' BERM , . x._..._ RAL GRADE - ~ Z GRADE ..,-.3 .n 2.0' NATURAL 3:1 3:1 PHASE 1 HYDROLOGY DATA:
Z1 GRADE ' 4.0' J ~ G-BADE _ NATURAL 3'. 3: ~ - D
- 6.0' -µGRADE 4.0' ~ ONSITE DA TO EXTENDED DETENTION WETLAND BYPASSING FOREBAY = 1.537 AC. LL
X-SECTION CHANNEL "B" & "C" (GRASS TRAPEZOID) X-SECTION CHANNEL "A" (GRASS V-SWALE) (NOTE: DEPTH VARIES. SEE PLAN VIEW} X-SECTION PERMANENT CHANNEL "D" (TRAPEZOID) XSECTION CHANNEL "E" (GRASS VSWALE) X-SECTION CHANNEL "F" (GRASS TRAPEZOID) ONSITE DA TO EXTENDED DETENTION WETLAND VIA FOREBAY = 4.107 AC. ~
APR 2 ~ ' ONSITE DA BYPASSING EXTENDED ENTION W T - ~Ad~ DET ELAND - 1.716 AC. (ALL PERVIOUS AREA) J
~ Y ~ENR • Wq = WETIgNDS TERQUALIt'r OFFSITE DA TO EXTENDED DETENTION WETLAND BYPASSING FOREBAY = 0.013 AC. ~
~_M.~w 33, WIDE VEGETATED WE N~STD~'At~~ OFFSITE DA TO EXTENDED DETENTION WETLAND VIA FOREBAY = btu 0.210 AC.
. ~ $UF~ ~ ~ . T~AND
~ MENT ER , D I D I SPA ~ ~ TOTAL DA TO EXTENDED DETENTION WETLAND = 5.867 AC. IMPERVIOUSNESS OF 7.36 AC. SITE = 3.83%
' wnTei ouAlmr Pa01.. SAL I ~..EV.25e:~e' A R
~ ~ NORIutAI POOL ,
i _ ~ -r, ~ 44-3L 6 3V B..EV. 257.ar ~ PHASE 2 HYDROLOGY DATA: ~
257.5 ~ ~ ~ ~
" ~ PLANTING GUIDELINES FOR WETLAND PLANTS: GI ' `a # LI GRAY'S SEDGE- PLANT PLUGS 4'0 AT ELEVATION 257.25' ONCE THE ONSITE DA TO EXTENDED DETENTION WETLAND BYPASSING FOREBAY = 0.453 AC. ~ EXTENDED DETENTION WETLAND IS HOLDING WATER. DO NOT APPLY ONSITE DA TO EXTENDED DETENTION WETLAND VIA FOREBAY = 5.656 AC.
OVEREXCAVATE 12 DEEP ALL AREAS ASSOCIATED WITH WETLAND ND LIME' ONSITE DA BYPASSING EXTENDED DETENTION WETLAND = 1.251 AC. ALL PERVIOUS AREA ~
~ - , ''D PLANTING PLAN AND REPLACE WITH ORGANIC TOPSOIL STOCKPILED ~ M 7.11 , r ~ J - FROM SITE. ~ 'ICED ( ) COMMON THREE SQUARE- PLANT PLUGS 4'0 AND 8'0 AT ELEVATION
D P~ ;1 ; r' 256.75' ONCE THE EXTENDED DETENTION WETLAND IS HOLDING WATER. OFFSITE DA TO EXTENDED DETENTION WETLAND BYPASSING FOREBAY = 0.000 AC.
~ , ~ I COLLECT TOPSOIL AND HERBACIOUS VEGETATION SAMPLES (SEEDBANK) DI . . ~ r ,ti;;; j,r • FROM WETLAND AREAS FROM ONSITE AND/OR NEARBY OFFSITE FOR - :EDBANK) Do Nor APPLY LIME. OFFSITE DA TO EXTENDED DETENTION WETLAND VIA FOREBAY = 0.028 AC. Z w Q ~ E FOR
, - ' ~ ' REDISTRIBUTION INTO THE CONSTRUCTED WETLAND TO INTRODUCE A Si J :...26¢°75.,:. 257 ~j_N ' ; ' r r • ~ :r; ; :r UCE A SOFT STEM BULLRUSH- PLANT PLUGS 4'0 AT ELEVATION 256.50' ONCE ~ ~
r%~`r~''%" `i.~:.,/~•` ~ DNERSE ARRAY OF LOCALLY ADAPTED WETLAND PLANTS AND OTHER TI . ' J~ 257.15 - •r< f ORGANISMS INTO THE CONSTRUCTED WETLAND. DISTRIBUTE THESE LI OTHER THE EXTENDED DETENTION WETLAND IS HOLDING WATER. DO NOT APPLY TOTAL DA TO EXTENDED DETENTION WETLAND = 6.137 AC. & 3 HESE LIME. U
fir: ~,r'' "SEEDBANK" SAMPLES INTO THE AREAS SHOWN ON THE CONSTRUCTED I C r , ~..r..~.:g ~TRUCTED IMPERVIOUS AREA TO EXTENDED DETENTION WETLAND = 5.180 AC (INC. 0.028 AC. OFFSITE) O p Z
ri ~'r ° , WETLAND PLANTING PLAN DETAIL. DI ~ r ~•~r r~ 'ir )'~~'a r,~; ; ~ r , 257 °~-rr ;•i•t ~ E) DUCK POTATO- PLANT TUBERS 4'0 AT ELEVATION 256.50' ONCE THE % IMPERVIOUSNESS OF 7.36 AC. SITE = 70.0% EXTENDED DETENTION WETLAND IS HOLDING WATER. DO NOT APPLY _ _ = O
~j'. % r, r/,''r 256.7 ',~.~-:~a ;,irj,; /j,, ;r' 'rr ~6~ r SWITHGRASS- MECHANICAL BROADCASTING OVER SCARIFIED 12" LI LIME. ~ IMPERVIOUSNESS TO EDW - 84.40, SA/DA 3.5272. ~
r % %i,~'' 256.25 f TOPSOIL ABOVE ELEVATI N ' ~ ~ ~ % - ~ t * * A 0 258.0. DO NOT APPLY LIME. PROVIDE ROVIDE EDW SURFACE AREA REQUIRED = 0.2165 AC. (9,431 S.F.) Z Q N
r "q r - MULCH & NETTING COVER. PROVIDE TEMPORARY COVER TO PREVENT W ,.y , err i FK ' ~ 1s7 ':;'`r ~%rr ~ EROSION WHILE SWITCHGRASS IS ESTABLISHING. 2, PREVENT WOOL GRASS- PLANT PLUGS 4'0 BETWEEN ELEVATIONS 257.00' & EDW SURFACE AREA PROVIDED = 0.2204 AC. 9,599 S.F. ~ ~ ~ ( ) N 257.25' ONCE THE EXTENDED DETENTION WETLAND IS HOLDING WATER.
. 15 N 26S " DO NOT APPLY LIME.
SB ~';,'%i r/° I -"256.5 ~ BUTTON BUSH- PLANT IN EARLY SPRING ONCE THE EXTENDED S~ , ~r 25725 i DETENTION WETLAND IS HO ING WAT R. , ~.,t. ~ 257.0 rr, ; r ff' 1 LD E AI , D Lv AMERICAN LOTUS- PLANT RHIZOMES AT ELEVATION 254.00' ONCE THE
L WATER LEVEL IN THE EXTENDED DETENTION WETLAND REACHES $@I11or Engineer;
~ „ r r r;•,. . , , ~ r,~ ~ ~ , , ; i j -r''/ ~-1• • BLUE FLAG IRIS- PLANT EITHER PLUGS (18 0 OR SEEDS 12 0 EL Q, r ~ ) ( ) r,~` ~ • ~ : DEPENDING ON AVAI ~7~J~' ,r'; ~ r. LABILITY AND SEASON OF PLANTING. PLUGS ARE 2"~) ELEVATION 255.50'. GS ARE K. WRENN
F-, , ,r , ' ~y , b.-X~; USUALLY AVAILABLE IN EARLY SPRING. PROVIDE NEUTRAL ph PLANTING PI PLANTING PICKERAL WEED- PLANT RHIZOMES 4'~ AT ELEVATION 256.50' ONCE
w xR~~ ~ ~~jY~„' ~ ' SOIL BY LIMING IF NECESSARY. PLANT ONCE THE EXTENDED TI x ~ # _ ~ - , . DETENTION WETLAND IS HOLDING WATER. NI THE EXTENDED DETENTION WETLAND IS HOLDING WATER. PROVIDE Drawn By: NEUTRAL pH PLANTING SOIL BY LIMING IF NECESSARY.
OFFSITE K. WRENN
. CONTRIBUTING DRAINAGE AREAS I E
A Y , ~ v.ti A Sa-cG EN ,.x X F ~ r , ~U
x. , k ~ ~ . FIC E N0. DATE DESCRIPTION
~ , R SYMBOL KEY BOTANICAL NAME COMMON rc COMMON NAME CLASSIFICATION PLANTING SIZE QUANTITY REMARKS ~ i 1 12/21/04 NCDWQSUBMITTAL
~~~e~L>''~ PlushTex Turf-Type Tall K' ~ ' GRASSES OR Turf-T e Tall Fescue Mix r r Seed As re uired 5 lbs. 1000 S . FL, 10-10-10 fertilizer 25 Ibs 1000 s.f. ellet lime 50 Ibs 1000 s.f. ~ ` 2 4/21/05 NCDW9 RE•~1BMIRAL yp G ound Cave q / q / , p /
=M1,- FK Festuca arundinocea Kentucky 31 F ~ h;-r`:~ i GROUND COVER Kentucky 31 Fescue Shade Tolerant Ground Caver Seed NI grass channels 5 Ibs./1000 Sq. Fi., 10-10-10 fertilizer 25 Ibs/1000 s.f., pellet lime 50 Ibs/1000 s.f. ~ ~ 11
I : A ~~~','1~ I PV Panicum vergatum Switch Grass Switch Grass Perimeter Seed 1 Ibs Broadcast as shown above elevation 258.0' (3,655 S.F.) CITY OF DURHAM
M _ _
JLLUIJANK w Sti Various Volunteers from Unsite/Offsite Seedba )nsite/Offsite 5eedbank wetland t'iants / you bamples Shovel Full 150 Samples ustnaute seeaoank specimens at elevation zai.U (Shaded area) 9 4 O.C. tA. iNttu Nt rnur. i t<ttuiNt STREAM BUFFER
CO Cephalanthus occidentalis Button Bush Button Bush Emergent Shrub Plugs or 1 Gal. 6 Plant as shown at elevation 257.50' fSWH DRAWN FIL E NAME
t Z N Iris vir iniona Blue Fla Iris Blue Flag Iris Emergent Peat Pots or Seeds 60 or 120 Plant 18"0 (plugs) or 12"0 (seeds) in groupings as shown at elevation 257.25' WQ1-C lot
EXTENDED DETEN110N WETLAND GRADING and PLANTING PLAN NOTES: HATCH KEY FOR POND DEPTH REGIMES (BLOWUP DETAIL) Z CG Carex grayi Grays Sedge Grays Sedge Perimeter Plugs 54 Plant 4'0 as shown at elevation 257.25' JECT a~~o1,ao
20' 0 1.OVEREXCAVATE 12" DEEP ALL AREAS ASSOCIATED WITH J SP Scir us pun ens Common Thre 20 40 60 WETLAND PLANTING PLAN AND REPLACE WITH ORGANIC a Common Three Square Emergent Grass Plugs 211 Plant 4'0 and 8'0 as shown at elevation 256.75'
SV Scirpus validus Soft-Stem Bu 1111111=1 lam TOPSOIL STOCKPILED FROM SITE. SL Sagittaria lancifolia Duck Potato Soft-Stem Bullrush Emergent Grass Plugs 2B Plant 4'd as shown at elevation 256.50' T SIZE; D-SQE (24~X36~ Duck Potato Emergent Tuber 158 Plant 4'0 as shown at elevation 256.50' OFFICIAL TREE PROTECTION INTERMITTENT
r Z 2.OVEREXCAVATE THE MICRO POOL AND FORBAY TO Q Scale 1 = 20' A SC Scirpus cyperinus Wool Grass Plant 4'0 as shown between elevations 257.00 - 257.25' TREESAVE AREA FENCING STREAM HEET wQ1 Wool Grass Emergent Grass Plugs 61
ELEVATION 253.00' (1' BELOW DESIGN GRADE) TO ALLOW NL Nelumbo luteo American Lotu American Lotus Emergent Rhizomes 4 Plant as shown at elevation 254.00' SYMBOL 1 HATCH KEY FOR ITEPLAN OF
FOR SEDIMENTATION VOLUME. 18"-36" DEPTH 9"-18" DEPTH 0"-9" DEPTH 0"-36" FOREBAY W 3 PC Pontederio cordata Pickeral Weed Pickeral We S ed Emergent Rhizomes 53 Plant 4'0 as shown at elevation 256.50
r

HANDWHEEL ACTUATOR FOR OPERATII 1TOR FOR OPERATING
,4 a BOTTOM DRAIN VALVE. PROVIDE BRA( NOTE: ALL FEROUS COMPONENTS ARE TO BE STABILIZE RISING STEM, LVE. PROVIDE BRACKET TO NORTH STEM,
8"0 X 1 2" STEEL PLATE CUT IN HALF FULLY BITUMINOUS COATED INSIDE AND 4.90' INSIDE ~ / OUTSIDE. `4.90' INSIDE ~ X 2.5" X 1/4" STEEL
W/ 4" x 6" HEAVY DUTY HINGE W/ BAND FOR MOUI SIX BOLTS. WELD REBAR TO PLATE. CONCRETE MANN BAND FOR MOUNTING TRASH RACK TO CONCRETE MANHOLE.
NOTE: SEE DETAIL AT UPPER RIGHT CORNER 30 a OF SHEET FOR DRAIN AND ACCESS STEP -48"0 CONCRETE PRECAST MANHOLE WITH 8" FLANGED DIP EMERGENCY
1/2" REBAR TRASH RACK. NO CLEAR ORIENTATIONS RELATNE TO EACH OTHER. 48"0 CONCRETE P OPENINGS GREATER THAN 8". EXTENDED BASE. f IXTENDED BASE. PROVIDE DOMED TRASH DRAIN PIPE AND 8"0 FLANGED 4" DIP ORAWDOWN PIPE WITH 2"4
RACK (NO OPENIN 24" NOTCHED WEIR EL. 258.68'. TOP /SPILLWAY I RACK (NO OPENINGS GREATER THAN 8'~ PLUG VALVE W/ RISER ROD & RESTRICTER PLATE FACING EAST. TOP /SPILLWAY EL. 259.10'. HAND WHEEL. FACING NORTH. SEE DETAIL TO LEFT.
TOP REBAR RING WELDED PROVIDE i" GAP IN REBAR FOR FACING EAST. WELD 1/2" REBAR = SEE DETAIL TO LEFT. -PRECAST HOLE TO RECENE 30" RCP.
TO BLIND FLANGE. HINGE OPERATION OF TRASH RACK. AS SHOWN TO PROVIDE OPENINGS o ~ PRECAST HOLE TC c~ GROUT WITH HIGH NO GREATER THAN 8" CLEAR. z CEMENT GROUT. GROUT WITH HIGH STRENGTH PORTLAND
• 2.5" X 1/4" STEEL BAND FOR WELDING w • • n REBAR TO AND FASTENING TO 48" MANHOLE. ° J CEMENT GROUT.
i;~, ATTACH TO 48" MH W/ 1/4" GALVANIZED o 9 0.
• ~ ~ • , ` SCREWS & LEAD ANCHORS 8" O.C. p RAW WN PIPE WITH 2"+h o ? 47 L.F. 30" CIASS III RCP BELL & SPIGOT MEETING Rf 30" CLASS III RCP ®1.00% W/ MODIFIED - iPIGOT MEETING REQUIREMENTS OF ASTM }
NOTE: RESDTRICTDER PLATE FACING EAST. • . • 4" DIP OPENING. I. SEE DETAIL AT UPPER RIGHT INV. AT M.H.- 257.00' C76. PIPES SHALL BE COf 'ES SHALL BE CONFINED 0-RING RUBBER r
HIDDEN INV. AT INLET- 256.00' o in GASKET JOINTS MEETING AS' ( ) i'ORNER OF SHEET FOR DRAIN AND n AsTM c-361. PIpE JOIN IOINTS MEETING ASTM C-443 AND JOINTS C-361. PIPE JOINTS SHALL 8E TYPE R-2. 65,50' Civil En ineerin
PROVIDE TRASH RACK. SEE DETAIL ~ / 9 9
AI - TOP VIEW ACCESS STEPS ORIENTATIONS roP vrEw TO LEFT. DET L ( ) , 4" DIP DRAWDOWN PIPE RELATIVE TO EACH OTHER. " F NGED DIP EMERGENCY g LA PROVIDE POL 24" NOTCHED WEIR EL. 258.67'. Land Planning PROVIDE POLYPROPYLENE COATED MANHOLE FACING EAST. SEE DETAIL TO LEFT.
L DRAIN PIPE AND 4"0 FLANGED ~ " STEPS ® 12 IN ET W TRASH RACK - . ALL FEROUS COMPONENTS ARE 8"o x 1 2" STEEL PLATE . . STEPS ®12" VERTICAL SEPARATION. Slte DBSl9n
~ IO BE FULLY BITUMINOUS COATED / ~ 8" ~ FOR WELDING REBAR T0. PLUG VALVE W/ RISER ROD W/ FILL MANHOL O.'.°s - 9s FILL MANHOLE W/ CLASS 3 CONCRETE MANHOLE STEPS CENTERED ON WEIR TO ELEV. 254.00' FOR ANTI-FLOTATION. 30" RCP OUTLET PIPE. SPILLWAY.
INSIDE AN OUTSIDE. 1/2" REBAR TRASH RACK. NO CLEAR HAND WHEEL. FACING NORTH. TO ELEV. 25 INV.- 257.00'. USE LEAN o " USE LEAN P( USE LEAN PORTLAND GROUT INSTEAD sEE DETAIL ro LEFT. WRENN ENGINEERING CO.
30 OPENINGS GREATER THAN 8". SEE TOP VIEW FOR REBAR LAYOUT PORTLAND GROUT TO 4" BELOW ~ OF CONCRETI & AROUND VALVE FOR FUTURE + •83' - VALVE FOR ~ OF CONCRETE WITHIN 4" OF DRAIN 1990 SEDW/CK RD. VALVE FOR MAINTENANCE. DETAIL- TOP VIEW OF RISER surTE 200-c
2.5" X 1/4" STEEL BAND FOR WELDING MAINTENANCE INSTEAD OF REBAR TO AND FASTENING TO 48" MANHOir. POURING CONRETE FLUSH TO MONOLITHIC DURHAM, NC 27713 MONOLITHIC EXTENDED MANHOLE BASE. SHOWING DRAIN ORIENTATIONS [phone]
4" DIP FL-PE WALL COLLAR ATTACH TO 48" MH W/ 1/4" GALVANIZED VALVE. BOTTOM ELE BOTTOM ELEV. 251.60'.
ANCHORED W/ HIGH STRENGTH BLOWUP SCALE 1" = 3' SCREWS & LEAD ANCHORS 8" O.C. PORTLAND GROUT. BLOWUP SCALE i" = 3' [phone] fax [e-mail]
- 8. " .C. MAX. `SIDE VIEW OF WEIR TRASH RACK. 5 0 NOTES:
4" DIP FLANGED N NOTE THAT THE RACK REBAR IS 1. DURING CONSTRUCTION THE RISER WILL BE 3. THE 3( LONG RADIUS ELBOW. 4" DIP DRAWDOWN PIPE WITH 2"~ ~ 2.00' EXTENDED AND BENT TO PROTECT 3. THE 30" BARREL IS CLASS III RCP, MODIFIED 5. OVEREXCAVATE 12" DEEP ALL AREAS
RESTRICTER PLATE FACING N.E. o WEIR FROM DEBRIS BLOCKAGE. SURROUNDED WITH WASHED STONE TO SERVE AS BELL AND PROVIDE WALL ANCHOR coLLAR. A SEDIMENT FILTER BEFORE THE WATER ENTERS OF ASTM BELL AND SPIGOT, MEETING THE REQUIREMENTS ASSOCIATED WITH WETLAND PLANTING PLAN OF ASTM C7fi. PIPE JOINTS SHALL BE CONFINED AND REPLACE WITH ORGANIC TOPSOIL
INV. AT M.H.- 257.00' INV. AT INLET- 256.00' 1/2" REBAR WEIR TRASH RACK. THE RISER AND OUTLET PIPE. O-RING R 0-RING RUBBER GASKET JOINTS MEETING ASTM STOCKPILED FROM SITE. SEE SHEET WQ1. REQUIRED VOLUMES FOR EXTENDED DETENTIONWETIAND
SEE SIDEVIEW ABOVE. C-443 AID C-443 AND JOINTS OF ASTM C-361. PIPE ~ ' i ELEV. FOREBAY MAIN POND AC UMVOL E ~ ` ~
2. THE 4"~ DRAWDOWN PIPE, THE 24" WEIR , JOINTS SF BASKET REBAR TRASH RACK. AND THE 48 ~ RISER ARE TO HAVE A PERMANENT JOINTS SHALL BE TYPE R-2. 6. OVEREXCAVATE THE MICRO POOL AND C UM ~ FORBAY TO ELEVATION 253.00' 1' BELOW (S.F.) (S.F.} (C.F.) ~
SEE DETAIL TO LEFT. TRASH RACK MOUNTED TO EACH OPENING TO 4. THE Eb T ~ 253.00 229 644 ~ Q 4. THE EXTENDED DETENTION WETLAND WILL BE DESIGN GRADE) TO ALLOW FOR SEDIMENTATION 254.00 6 0
. ~ 4.00' PREVENT DEBRIS FROM ENTERING. THE OPEN USED AS 5" WALL USED AS A TEMPORARY SEDIMENT CONTROL VOLUME. 3 2 892 0 255.00 522 1165 ~ ~ " 1471
~ ~ THICKNESS AREA OF EACH ORIFICES TRASH RACK MUST BASIN DUf BASIN DURING CONSTRUCTION AND MUST BE 1)PERATIONAL 255.50 612 1322 2376 ` CLEANED OUT, VEGETATED, AND 256.00 709 3813 3940 F
o EXCEED THE ORIFICE AREA TO PREVENT FLOW CLEANED ~ ` TRASHRACK BLOWUP SCALE 1" = 2' RESTRICTION. SEE DETAILS. PRIOR TO iION BASIN AND ~ PRIOR TO USE AS A WET DETEN 256.25 1171 4772 5223 ~
BEFORE A ~9.5"~ , BEFORE ANY PERMANENT BUILDINGS ARE 256.50 1239 5469 6804 'l~
24 NOTCHED WEIR EL 258.68 OCCUPIED, FI TRA H RACK. O.C. ORI CE S OCCUPIED. 256.75 1308 5999 8556 r~~ 257.00 1379 8220 10669 d "
WELD 1/2" REBAR TO BLIND FLANGE AS
SHOWN. NO 4" DIP ORAWDOWN PIPE WITH 2"~ ELEV. FOREBAY & ACCUM VOLUME FOR REVIEW ONLY. MAIN POND (C.F.)
OPENINGS GREATER DETAIL- (SIDEVIEW) THAN 2". 4" DIP DRAWDOWN PIPE RESTRICTER PLATE. 48"~ CONCRETE PRECAST t, E PRECAST MANHOLE WITH EXTENDED (s.F.) NOT FOR CONSTRUCTION.
INV. AT M.H.- 257.00' BASE. PROVIDE DOMED TRA'. DOMED TRASH RACK (NO OPENINGS 257.50 10313 15647 258.00 11050 20988
INV. AT INLET- 256.00' GREATER THAN 8") „ $ 258.50 11778 26695
BLIND FLANGE W 2"4~ EXC. GR SPILLWAY EL. 259.10' / - __~UNQ 259.10' 258.68 12001 28635
HOLE DRILLED IN BOTTOM - __PRQF'j TO CONTROL INFLOW. LE V - _ARI 259.00 12478 32752 16' WIDE EARTHEN BROADCRESTED WEIR 260.00 14oa4 45993
ES~ , 10.00 EMERGENCY SPILLWAY ELEV. 260.0'.
• 1/z° REBAR TRASH 2YR ELEV. 259.56 RACK CAGE. MAX. 2" ~ fi ~ , ''r:~''~ • ' • OPENINGS. TflOYR--ELEV. 260.25 _ 10YR ELI V. 259.84 ~,:ii~~i!r, DAM EL. 261.0' ',far,,; 1.
,~~;,4 LINE 20 L.F. OF DITCH
• • = W P ELEV. 258.68 - - •1 - - I -i' 'i W RIP-RAP. GRIN - - I I - - ,~;r;,, 30 RCP FES / G
4" DIP OPENING. - _ - . _ i''' ~ -I - (HIDDEN) NORMAL POOL - ~ - - -I ~ - - ~ I- - - _ _ _ = 3'1 ELEV. 253.53'. RIP-RAP UP TO ELEV.
ELEVATION 257.00' _ DETAIL- (BOTTOM VIEW) 47 L.F. 30" RCP ~ 1.00% _ - - - - - - - ' Ul - 255.53. SEE PLAN. J . Z
4" DIP DRAWDOWN PIPE INLET W/ 2° ~ TIGHT 0-RING GA K ~ 1.00% W E - - ~ ~ - - - - - Q Q
RESTRICTER PLATE & TRASH RACK. POND DESIGN INVERT EL. 254.0 S ETTED +SKETTED CT N - - I-~
SEDIMENT STORAGE SEE PLANTING PLAN FOR WETLAND OUER EXCAVATE MICROPOOL & FORBAY TO EL. 253.0' a w
TRASHRACK BLOWUP SCALE 1" = 1' PLANTING SCHEDULE FOR BASIN. _ - ~
- - I-
- 30" RCP OUTLET 8 BOT. DRAIN & VALVE EL. 254.00 , - - INVERT EL. 254.0' TLET ~-10.00' Z .54.0 W
Z CORE OF DAM TO BE SELECT LOW PERMEABILITY CLAY
EXTENDED BASE OF MATERIAL AND COMPACTED TO 98~ DRY DENSITY. WHERE W
D1 SECTION THRDUGH EXTENDED DETENTION WETLAND PRECAST MANHOLE. CONC. NOTE: SEE DETAIL AT UPPER RIGHT ~T CORE IS IN CUT, VIRGIN MATERIAL MAY BE LEFT IN PLACE IF W
yyQ~ SCALE 1 = 6 BASE EL. 251.60' FOR DRAIN ORIENTATIONS RELATIVE Q E DETERMINED TO HAVE ADEQUATE CONSOLIDATION &
TO EACH OTHER. PERMEABILITY BY FIELD ENGINEER. Q
I Z
~ I ~ Q
MIN.
I LL N
I ~ I ~ ~ z LL
A o ~
9' MIN. . r~..
I A ~ I Q Q FILTER
FABRIC Z TT
~ ~P R 30 LL
1
ELEVATION
d
A 6" THICK LAYER OF F~ W J N 3/4" STONE LL
LL
1 FILTER J FABRIC 2.1 24" MAX W ~ O
RIP-RAP VELOCITY DISSIPATER AT CENTER = v, U1 LL
CHANNEL LINING. LINE 20 /
L.F. OF CHANNEL AND UP / EXTEND PERMANENT TURF
SIDES OF FES. / REINFORCEMENT MATTINGTO NORMAL / POOL ELEVATION OF POND (257.00'). CLASS A ~ EROSION CONTROL STONE
1 / ROCK CHECK DAM
W~l SECTION -
_ ~
K
i
MOVE FTDICE aR MOVE FENCE oR REMOVE Z
~ i _ ~ ~ ~o,E REMOVE TREE IF MORE SEQUENCE: W IRAN 20.5 OF A TREE'S 1. OBTAIN APPROPRIATE PERMITS 0 ~ RAT AREA 2. HOLD A PRECON51RUC110N CONFERENCE WITH THE LANDSCAPE PROTECTION SUPERVISOR,
~ hu soa oaEw. wu Env. se,.ao • A' iREGST CWICREfE CQvFR Is uFPROTECIED. 0 ARCHITECT OR LANDSCAPE ARCHITECT AND URBAN FORESTER. 3. ERECT TREE PROTECTION FENGNG ~ 3 xEtE crnm 4. CLEAR AND GRUB TREES AND SHRUBS TO BE REMOVED }
M71f1 HNlIXEB I 5. INSTALL SGL AND EROSION CONTROL MEASURES 0 3' RETAIN 6. ROUGH GRADE SITE ~ U
S 7. IXCAVATE FOR FOOTINGS, INSTALL UTILITIES AND CONSTRUCT BUILDING 0 0 Z 8. FlNISH FlNAL GRAGNG AND PANNC ~
D2 POND EMERGENCY SPILLWAY " 6' PERMANENT TURF REINFORCEMENT - - m. y~`, sMOmN ~ cRl ~ LORE 9. REMOVE TREE PROTECTION FQJGNG N 10. INSTALL LANDSCAPING
SCALE: 1" = 10' „ fl° WQ1 MATTING TRM". SHEAR RESISTANCE= 8.0 O TREE v / ~ Z Fes- N
LB/S.F. LINE EMERGENCY SPILLWAY UP x 4~ l/ ~ Q J/4' RNM)S 0 Q
TO ELEV. 260.50'. LINE SPILLWAY INSIDE 8' S-4' 8" CRI ZGNE O y
AND OUTSIDE OF POND (HATCHED AREA). ort XS~E War D NOTES: 1. R00T PRUNE TREES TO REMAIN WriERE CONSTRUCTION ACTIVITIES WILL SEVER ROOTS. O ~ 2. ANY TREE ROOTS IXPOSED BY CONSTRUCTION SHALL ~ SEVERED CLEANLY'MTH A Ci Z
HAVE 'fiRM" FIELD REPRESENTATIVE ~ w" a• e' S~ ~ ~ PRUNING TOOL 3. DO NOT DISPOSE OF ANY CHEMICALS OR REMOVE SOIL OUTSIDE THE UMTS aF WORK. ORANGE TENSAR PLASTIC FABRIC CR EQUAL p~
PRESENT DURING INSTALLATION. m 4. WHEN INSTALLING NEW LANDSCAPE PLANTS, DO NOT DRIVE EQUIPMENT UPON OR HEIGHTN OF FENON SH BE APPRO%IMATELY a e' DISTURB THE SGL WITHIN THE CRITICAL R00T ZONE OF IXISTING TREES. JQCIIOC EI'~ginA~r.
~ - 5. AT THE START OF GRADING INVOLVING THE LOWERING OF EXISTING GRADE AROUND g STEEL Pos 10 . SPACRJG MAXIMUM y_p ;~_I• ~BmE A TREE GR STRIPPING of TOPSOIL, A CLEAN, SHARP, VERTICAL CUT SHALL BE IC WRENN S,_,, MADE AT THE EDGE OF THE TREE SAVE AREA AT THE SAME TIME AS OTHER
i'-'• w 5' go o€ 38' AREA AROUND WNDLE SHAH BE COUN1EIt EROSION CONTROL MEASURES ARE INSTALLED. THE TREE PROTECTION FENCING SuMC I' AND h4NgLE sHUL BE FREE TO SHALL BE INSTALLED ON THE SIDE ~ THE CUT FARTHEST AWAY FROM THE TREE
~ ~ HOVE ~ ~ DONN TRUNK, AND SHALL REMAIN IN PLACE UNTIL ALL CONSTRUCTION IN THE VIGNITY ~"a~ t' I• RwE y LoNC OF THE TREES IS COMPLETE. NO STORAGE OF MATERIALS, FlLL, OR EQUIPMENT
OP i~ g~ -J-- ~ SPILLWAY SLOPED ®1.0% TOP OF DAM ~ I e~~~p~ e' ~ J- PROTECTED AREA~NG SHALL BE ALLOWED WITHIN THE BOUNDARY OF THE K. WRENN 4' 'NO iRESPA59NG w1HIN TAEESAVE AREA'
3.1 EL 261.0' B~ I 1.0' DEPTH 6. THE ROOT PROTECTION ZONE IS AN AREA THAT COVERS T' RADIUS FROM THE SICNS ib BE MSTALIED ON IRE PROTECTION TRUNK FOR EACH 1" CALIPER OF THE TRUNK. FENCING AT A MAXIMUM W 73 O.G c[~1'
!;1",b, GRASS LINED SPILLWAY EL. 260.0' ~ ~ s. 7 7. WHERE BOTH TREE PROTECTION FENGNG AND SILT FENGNG ARE REQUIRED, THE wzrlEN M BOTH SPANISH Are ENOUSH. ISSUE HM?olF AnACHrar pEyyll TREE PROTECTION FENCING SHALL BE INSTALLED CLOSEST TO THE WOODLINE. A
a<o O ~ 8. TREE PROTECTION FENCE TO BE MARKED EVERY 75 TO 100 FEET APART WITH NO. DATE DESCRIPTION SIGNAGE IN BOTH SPANISH ANO ENGLISH SAYING "KEEP OUT" ~ 2/21/04 NCDW9SUBMIITAL
~ DETAIL OF YARD INLET I TRA ~ ZOIDAL WfIR . I i ----------16 PE ----~--r~---- 2, ~ 2 4/27/05 NCDW9 RE~UBMIITAL
I'~' ~
~ ~ D3 ~ 4' X 4' YARD INLET YCB-1 ~ ~ TREE PROTECTION FENCING
f ' . WQ1 PRECAST CONCRETE COVER W[HANDLES W0~
i , PERMANENT SPILLWAY LINING:
LINE EMERGENCY SPILLWAY UP TO ELEV.
260.50' WITH TURF REINFORCEMENT D2 MATTING RATED AT 8.0 LB/S.F. LINE DALE DRAWN FlLE NAME
POND EMERGENCY SPILLWAY SPILLWAY INSIDE AND OUTSIDE OF POND
EE PLAN VIEW ABOVE. PROJECT 03101.00
~01 PERSPECTIVE VIEW AND TO NORMAL POOL ELEVATION 257.0. SHEEP SIZE: PSIIE (145Q6)
SHEET W 0
OF L

_ _ _ _
~ j I i` I I ~ ,i ~
Q ~ : I I t i CASE # D03-658 / ~i ~
I ) \ \ 1 j~ I ~ i W \ I I / ~ ~ / ~ PIN: 0738-03-01-8050 / / ~ / Parcel-ID: 541 -02-002
TO CHAPEL H1 l ~ ~ ~ ^ ROOTZO~E PROTECTION REA= AREAS , ~ ! ~O ~ I r I ~ CO ~ f ~ ;I i OFFS i` DRAINAGE / / \ /
j I I ^ „ ^ MEASURED, IN FEET RADIU FROM TF1~ TREE ~ N - ~ , rp \ C #54 HWY ~ I I i I ~ TRUNK EQ L TO THE TR NK DIAMET R IN \ 1 ~ / V I \ AREA (OSDA-GY ` / \ i
i I, N INCHES & I NO LESS THAN 6' MINI UM J DRAINAGE BASIN ~ IN ~ / . ' / BAS _ / ; r A - 0.621 AC. ~ v r/
J I ! I l: ~ RADIUS FRO THE TREE TR NK. ` I BOUND RY 1 N ~ J o ~ II ~ I~I ~'o v / ~ DIVERTED ~ HWY \ ~
r0\`'~ ~ ~ ~ ; Z DOUG S & PAMELA LOWE ~ `i \ \ ~ce~c ~ J I 1 I I',. 55 DITC~I. i / f / f~ \ ~ f
H 1~ ~ PIN 73 -03-01-9325 ~ \ ua ,el I ~ \ OFFSITE DRAINAGE I ~ ~ ~ \ it' v J
~ I o T.M. - ` I ~ ~ ' I I Rp I I z ~ 102(192 \ ~ '~EA OSDA-E i ~ I o/ \ ~ ( ) i ~ t J
s ~ Z I k' o o I LI '~IT~ F DISTURBANCE \ ~ I I I I ~ ~ ~ ZONE (NC & RD) \ / DA = 0.095 AC. ~ ( ~ ~ f
NORTH ALLEN j' I 1 I T PROTECTION ~ OOWN ~ ~ I USE- RESIDENTIAL ~ ~ I~ I'. ` JI \ ~ ~ DIVERTED f0 54" I Z 1 „
I I F1rN I G ~ ~ ~ - I i z- - F/J-B TERSHED 1 4 v I II I \ ; CULV,E~TS. l 2-54 RCP CULVERTS INLET. Wrenn En ineerin 9 9
W j ~r1 I N ~ , - CAPE F AR RIVER ~ASIN ? ~ Z >C I I I I I N 2 Z ~ ~ q to W ~ J I MITERED HEADWALL ELEV. 260.00' i ~ / Civil En ineerin
v > I ! I - ~ ;,GRAN L G (EX. (GRASS N-SH E) ~ ~ LLI Q MAGNETIC (P.B. 44 , P.77)1978 I I ~ \ ~COP>` ARIES,-•DE~TH,VIiRIES. I ~ Um ~ J f I 8 X 20 RIP-RAP MAT g g ~ / ` f i' Land Plannin
O - - ) c~ iY ' FLOW - I d50=9 , d= 23", LINE W/ FABRIC. g -,w~,,-,,,- i ~ l / 1 / " \ if t % s J I Slte Deslgn
cn - I + I : ~ I ~ ',j FLOW \ ~1~.~ / l l
Site ' _ m / Flow ~~'4'~ 7 I i ~ RE iN_ ~ FLOW . w• t-- - - E 6 .5 R \ M~ / I
+ I ~ I ~ "f ='~yv • ~J`~9:.: Ex. CHANNEL • " LIMITS OF DISTURBANCE & r~ I ~ ~ c ~ , h o~ 1 e -CHANN " " \ q ~ m / J ~ / / I WRENN ENGINEERING CO.
I ~ 5x TR PROTECTION FENCING. / `p ! II f °P 18a -c' = SLOPE, ` EE I I ' ~ ~ _ ~ I ~ BLpcs. F~ 1.5 El E ~GRAS$ V ~ ~ \ Mau". / / ~ SlOPE, SHAPE ~ ~ ~ S.S.- 3:1 _ ~ J v m / J 1910 SEDWICK RD.
i / II :f~ °W FLOW ~ ~ ~ D g , 9 / / ~ q l / / / ~ J LIMITS OF DISTURBANCE SUITE 2o0-C
HR. I( ~ I ' I ~y.p ~ SILT FENCE TO E E i J i , F~ow~ / / & TREE PROTECTION ouRHaM, NC 27713 ~ VEGETATION / J 919 806-5082
~ PROTECT CULVERT FES. ~ I: I ~ IJ 11111 p TO REMAIN / / FENCING ~ ~ / VE ATION / ~ J [phone] fox
5 i I I ..~1 I ~ ~ EX. HOUSE r ,~`0"-I~ / OFFSITE DRAINAGE ~ I i ~ , ~ I ~-~°V' ~ V A / / ~ l I VYKM! ~ / T REMAIN/ ~ WRENNENG.COM / , ~ / I
I I I ~ 19 ,L~~ / AREA OSDA-F I J ~ ~ " ~ / ~ ) I Ill :4". / SILT FE ZE TO HERE ~ ~ 2~•5' OFFSITE DRAINAGE
DA = 0.013 AC. ' Ex. - ~ \ ~ ~ ~ ~ eta, l ~ l TIE ~U HEADWALL,. \ . ?6 J J / AR
~ (f I I I I BLDG. \ \ ~'G ~ ~ Q GOES TO POND. I ( ~ ADDIrION ~ 1 ~ ~ ~ I I; ~ \ v ~ ~ / / /J v / / / ~ - DA - 0.2096 AC.
n- f ~ / I + j ~1 ~ ~ HANNEL ~
1 -1000 I f _ } , ' : r Vlclnl Ma I r II " I ' pLAa ~ 11 1 ~ -fi BERM J I ! ,I
I ~ r _ DROPOff ~ - - I 4 ~®ox ~1 ~ „ ~ j I I I D ~ GRAVEL ,dRIVE/PARKING i ~ ~ I ll PIPING OF INTERMITTENT STREAM
Seeding Schedule for Slopes 3.1 or Less `-t' ~ FocE a _ - _ _¢"_CA$C, 3" X57 I \ ~ o i ~ ~ - i ~ ~ - - LT FENCE TO HERE. I ( ~ I ~ ~ / AND REMOVAL OF STREAM BUFFER. i ~ I ~ - TI TO KEADW L / ( I I / I „
I I I / Foll Winter S rin Tem orar Cover Au ust 15 - Ma 1 25' X 50' GRAVEL / /P 9 P Y 9 Y I w i ~ ~ t \ 438 L.F. OF 2-54 CLASS III RCP / Ii / / I ~ ~ I JI
I CONSTRUCTION ~VTRAN E i Lime 100 Its 1000 sf ~ ~ 1 f I ~ \ / I I CHANNEL \ „ ~ , - \ CULVERTS AT 0.913%. CULVERT
10-10-10 Fertilizer 25 Ibs/1000 sf I I ~ \ I ~ -rt - - - 2 Ibs loon sf SILT FENCE TO HERE. ;I I ~ DEPTH- 6" \ i / I ~ ~ )l BACKFILL TO BE STRUCTURAL
Oat Seed / / I f w \ i m OCK CHECKDAM Rye Grain Seed 1 Ibs/1000 sf TIE TO SLOPE. ; I (E IIIMIENT) J ~ / / I I 1 ~ I / ( , CONTROLLED FILL TO 15 EITHER / / / C NEI "D" TRAP. I I I / I I SIDE OF CULVERT CENTERLINE.
Straw Mulch * 100 Ibs/1000 sf ~ _ _ . - I I CH NEL "F" (TRAP. \ - _ I \ \
LIMITS OF DISTURBANCE I I 1.OX SLOPE, S.S.- 1, „ ~ - - / I I r- W- 4~; DEPTH VAR( _ _ / wl s', PTH 3'. I STREAM BUFFER IS REMOVED. ,
Summer Tem orar Cover Ma 1 - Au ust 15 I I l I ~ P Y Y 9 /i I I I I \ w ~ I ~ J J ~i J I ate. ~ ~ I ti
Lime 100 Ibs/1000 sf / I I i I \ ~ m _ ~ - ~ ~ ~ f I I I I ~ CHANNEL 10 10 10 Fertilizer 15 Ibs/1000 s _ , I / I I I CHANNEL\ \ _ _
Browntop Millet Seed 1 Ibs/1000 sf I I I DEPTH- 1 \ DEPTH- 12 ~ - -
Straw Mulch ' 100 Ibs/1000 sf I / ° I I w ~ i I I I o \ ` / / I r~; , I ( 3 1 S P 1 i
I ~ - ~ 3 ROCK \ / ~ rin II P rm n n v r March 1 -Aril 30 ! I I - 1 \ ~ BERM Sp g/Fa e c e t Co e p CHECKDAM 7 L.F.- "RCP W/ 0 RING ~ ~f I 1 \ ~a f 1 ~ ~
August 16 -October 31 ~ ; i I -+F ° (PERMANENT) TERTIGHT ASKETS A 1.OX UP / OP WIDTH= 3' I I ~-SLOPE I ~ / J 1~ I 4~
+ I I W 53.53'. SEE / I 100 Ibs 1000 sf I ~ Z N W -n ~ _L~ Lime / , DET SHEET OTE BELO . / I UM \ ~ 1 1 / ? MINI /
- - t 00 sf I i I I ~ 1 \ z \ \ r' / C NEL "B" (TRAP.) l.t>sf 10 10 10 Fertilizer 25 Ibs/ 0 I I a \ _ 1.0~ I I I 1 \ v I / ~ ~ i~ I x 4 ~ / / ALLY AREAS EXCE IFOR S~.D. \ \ ~ ~ I I N
Im roved Turf T e Fescue Seed 7 Ibs 1000 sf i ~ I POND PRI SPILLWAY ~ SLO S.S.- 3/I, W- 4 P YP / -L ) ~21 ~ L ~ Straw Mulch * 100 Ibs/1000 sf , ~ + t 12 1~ - w 4'0 P1tE•sA~r .H. DEPTH IES! ~ C \ I o / / v v l I o
I ' j 1= - RIM- 259.10', 254.E I I - ~ ~ I~ MTS., BEAMS, Fl I SLOPS, I o \ I o J ~ rod / / AND CHAN ELS T IBE \ I I ~ I
Seed temporary cover to stabilize temporary sedimentation control I I I I I I = SEE DETAIL W dt NETTING ~ SILT FENCE TO HERE. i I I I ~ measures and other disturbed areas prior to final grading or if + I II I I_ \ \ CHANNEL ~ ~ / / / REFORESTE WITH G~tICULTU ~ DRAINAG BASINI ! o
planting season is not suitable for installation of permanent cover. TIE TO CULVERT FES (OUT2) i I ~ I ~ \ ~t . DEPTH- 15" I / / / / p I BOUND J / I PINES AND STABILI ED\1IVITH I I ro o f
Seed ermanent cover when final rodin has been accom fished. + I II I ~ ` / P 9 9 P j_ I I + I ( _ \ P T1 / \ 1 I I coo I„ 3 (O~I ) / ( PERMANEN \GRASS GRO D \ \ I \ I TURF REINFORCEMENT t~ d,
L "A" GRASS V-SHAPE W CURLED I - ~ ~ 3 ( CHANNE ( ~ / I _ Q , _ - :1 - - I I (I I L o ~ WOOD MATTING. 1.09 SLOPE. S.S. 2 D ~ I I ( ~ , _ 0 ~ \ \ " - 54,0 COVER TOP N EROSI ~ ALL \ I I 1 MATTINCRATEDATB I our ~ / / " I I ~ j \ I LB1S.F. SHEAR. ~ I
" INE FIRST 10' OF CHANNEL W d50 = I C I I ~ Z / 31- ~ 36 24 . L / I w ~ / RCP 12.9 31• ~ 3sI \ AREAS TO BE TABI IZED WITI~. \ ;III TO 24' DEPTH ro I 1 \ \1 0~ o,~Q
"RIP-RAP D=23° FABRIC. ' I I ti ~ I RCP t2.99~ S GROUND C R. \ I ~ a \ 1 I N W I J ~ ~ REDISTRIBUTE ALL 0 TE \ \ ~ ~ o ~o I
I ~ ~ 1 I ~ N EXTEND EN sTRAw NE~f I ~ I I STRAW N NG \ \ ~I I I ~ ~ ~t ~ I I TOPSO ~ ~ J 1 P W ~ I I j}, NAT
TRANSITION POINT IN CHANNEL FROM RIP-RAP ~ I ~ I I ET. ~ _ YCB-t w/ II TO EXCELSIOR MARRING. I ~ UT 14' x Y D --YCB-t W/ INLET PROTECTION \ ~ ~ I I ~ ~ 2 p 1 ~ \ 1 f I Z. GRADE Q 14' X Y DIN ~ \ ~ I ~ 1 J I U~~
J I 1 - - I /RIM- 61. ' ~l 1 /RIM- 61. TO - 261.93', ~ \ / }
LINE EMERGENCY SPILLWAY WITH TURF I I . ' I + \ INV.- 57b . ~ I I ! 11 / I I Z ~ INV.- 157,b . 4 IDES OPEN. \ UM OF E dt ~ J X-SECTION CHANNEL "A" (GRASS V-SWALE)
REINFORCEMENT MATTING RATED AT 8 LB/S.F. I I ~ - N \TOP 4 ~LT I TOP T E- 262.1' \ IN I / I U \ ~ FEI~C TREE C G ~ I 4 /
H R. SLOPE = 129. I I I i f ~ D S EA ~ I ' $U Aft fR 1 .I I ~ I I SEE DETAIL SHEET. , I I ~ 2r~, 8~ F STRAW & NETTING = SED~MENT BASIN A \ \ ~ ~ ~
I SEE bETAIL SHEET. \ \ I I l~ 48„ / . TO 5 DEPTH WHERE ~ w ~ \ J L` ~ J ~ I SHOWN ON PLANS. o I C~YNVNEL "C" (TRAP,Y \ I ly / J I
SILT FENCE & TREE PROTECTION FENCING AT t I ~ ~ a _ m ° / I 11, I I I ~ t; a o I s1TE AND EROSION coNTROL NOTES. LIMITS OF DISTURBANCE & FOLLOWS STREAM LL I I a I 1.0 SLOPE S..- 3:1 ~ / ~ + ~ a.o~ ~ J I ~ ~ " ~ I J /I 1 \ I NATO - g.1 3:
BUFFER. TIE SILT FENCE TO CULVERT FES: av ~ I I ~ \ W- DEPTH 18 . / 5 RC~ I gA,, - 1 - ~ ~ j SILT FENCE TO HERE. J - / / ~ ~•1 I I GRADE - _ \ / I ~ I - . Q
a. Total disturbed area: 5.98 acres. ~ ' I ~ I + - ~5: ro g LOW \ I \ t I I ° t .t ~ _ . d LOW I H N ERM J~ I I I 4.0' Z 154R1' E B I Q J J I I I I
b. All tree protection fencing on this project is required 1b be installed and inspected + ~ s DRAINAGE BASIN/ Iy. / I I ~ Q TOP WIDTH BOUN ~ J / I J I J J J XSECTION CHANNEL "B" & "C" (GRASS TRAPEZOID D1~ f I I C I ) W J
I N? I before the grading permit is issued. All tree protection fencng shall be maintained ~ I ~ -IO II is I ~ , _ _ _ ROW ` r f I I I / / (NOTE: DEPTH VARIES. SEE PLAN VIEW) I I ~ ~ ~
until all site work is completed and the final inspection is scheduled. The fencng shall \ $ , I ~ . be removed prior to the final site inspection for the certificate of occupancy (CO). ~ t ~ - - \ ~ ~ a~GET u~GET i% 11 I f I i~ I STRAW & NETTING TO x
I \ , - f _ _ ~ 3 DEPTHWHERE ry a _
c. The tree protection fence marks the limits of disturbance except where the limits of I I R - j, ~ J I I I I I SHOWN ON PLANS. ° o ~ j . / / I ~ TO REMAN J
withouttree rotectionfencin . I ~ t ~ ~ - disturbance line is illustrated p g I I ~ I _ - - I ; A L _ 1 I 6 rl~ I I ~ l I ~ 10:1 '
d. Overla s: Jordan Lake Watershed F!J B ( ) - Y I - ,6~g~ l . s 1 l III _ Z 1 I ~ I J I ` I I ` 00,` -NATURAL
I I I I - • FASEME ~ NT ~ e. Establishment of ermanent round cover will be re wired within 15 working days ~ ~ ~ . ~ D ~ 1 - _ ~ G 0 ~ ~ ~ ~ ~ / ~ ~ , I BADE
or 30 calender da s whichever is less of last rodin effort. Y( ) g g I I I BENCHMARK - l~ II . ` ~ ••~^c T~~ - I X-SECTION PERMANENT CHANN ~ ~ _ ~ _ _ ~ S I ~ I I EL D" {TRAPEZOID)
yM ~ i~ _ M.H.1 ~ I I ~ Z o U1 W ~ 1 I I GRASS LINED Z
f. Cut or fill slopes greater than 3:1 requ+re apshalt emulsion tacking or hydroseeding. I I I _ SS M H RIM/ ~ l ,Sufi FENCE TO HERE. SILT ~ - i ~ TIE a~ ~ ~ J I i i I ~ W SILT FENCE TO HERE. ~ , O ~ LIMITS OF/ DISTURBANCE J I I I _NATURAL J
- i re wired before an land disturbance takes ace. I -I=L. ~Fr2.17 TlE TO HEADWALL. g. A pre constructton conferences q y fg \ ~ I I r I / , \ TIE TO BASIN BERM. a m ~ I I I _ z.o ~ ~ / TREE PROTECTION FEN ING ~ ~ c~ - ~ i~ (n
Call the County S&E Officer (919-560-0735) and Project Engineer (919-806-5082) at / - ~ \ 3.8, _ - - / / l I i .1 ~ 354 -RCPs & HEADWALL, INV. ELEV. 256.00' I 3. 3 0
least 48 hours in advance of any land disturbance. Ensure that all interested parties ~ I ` ~ ~ , - r ~ \ ~ \ I 'PERMANENT STO,GfM"DRAINAGE ~ - \ 8 X have adequate notice of pre-construction meeting. Refer to construction sequence. ~ I 0 ~ ~ / A ~ ru / f II I 8 X 20' RIP-RAP VELOCITY DISSIPATOR ~ W ~
~ I ~ ~ ESMT. G17ANTE~ TO NCDOT FOR / d50 - I I I ~ NEW CULVERT INSTALLATION. RESEARCH LAND JOINT VENTURE d50-9 , d- 23 , LINE WI FABRIC. i ; I I r X-SECTION CHANNEL "E" (GRASS V-SWALE Q cn W / / ~ ! 1 I ~ I ~ PAI~}(f~j )
~ / 1738-03-00-8432' ~ STREA 1 I ~ \ PN 1 1 I c STREAM BUFFER TO BE REMOVED / I f I I; II
I m ~ / T.M.# 541-02-001/ ~ TO TH TO THE END OF PIPING. ~ / ~ I i \ N ~ / I I ( 1,% ~ I, GRASS uNED ~ w
I I I~ / ~ \ EROSION CONTROL CONSTRUCTION SEQUENCE I ~ \ DB 17621535~PB 1021169 r \ ~o / I I f J I I \
~ I \ \ J ZONE (NC & RD ~ ~ to ensure are twflt and ~ \ PART ONE- Before Pre-Construction Conference 3.5 Before beginning any mass clearing or grading, inspect all the measures they \ \ I USE- VACANT ~ - / ~ ~ 3: ~ ~ 10.0' BERM / i' S ~ NATURAL 3'1 u
1.10btain a copy of the Approved Erosion Control Plan. operating correctly and then call for an anstte inspection of the sediment axtrd devices and site by the \ ~ , / I i ~ - - i I J ~ ` RARE - /
Project Engineer (919-806-5082) and the Durham County Sedimentation and Erosion Contrd Officer \ I FIJ$ WATERSHED 1.2 Install all Orange Barricade Tree-Protection Fencing and notify Project Engineer {919-80Cr5082) (919-560-0739). The site should be ready for clearing and mass grading arse the site has been inspected \ / CAPE FEAR RIVER BASIN / ~ ~ J l l ~ I f I 1'
and Durham County Erosion and Sedimentation Control Officer (919.560-0739) when fl is by the County S&E and the Project Engineer. / / / I ~ _L / _ ~ _ XSECTION CHANNEL "F" (GRASS TRAPEZOID) / 1 _ ~
completely installed for inspection. Have surveyor stake out tree protection fencing to ensure that it is located propedy. 3.6 Begin clearing the site once the sediment basin and temporary sedimeriktrap are installed and
inspected and the twin 54" culvert is being laid. Begin grubbing and grading the Sipe asthe culvert laying
1.3 Do not disturb the site yet. progresses. Do not get ahead of the culvert laying with any grubbing, grading, a otlier land disturbing activity and ensure that the stream, stream banks, and area within 5' of the stream barks are not disturbed ~ N
PART TWO- Pre-Construction Conference at Site until the pipe laying progress demands that @ be done. Z 0 r.
2.1 Contact all parties interested in attending the Project Pre-Construction Conference to discuss the 50 0 project and erosion control plan in order to schedule a date that all can attend. These include, but 3.7 Ensure that the erosion control measures are propedy stabilized and maindained so that sediment - - 0 50' 100' 150' - - - - ~ 3
are not limited to the following parties: Project owner or representative, Durham County Erosion does not contaminate runoff as it leaves the site. Install any remairrng sift fence, temporary diversion ~ ~
Control Officer (919-560-0739), Project Engineer (919-806-5082), Grading Contractor, City of ditches, or other devices that are necessary to contain sediment onsite and out of the streams, adjacent Durham Engineering, Utility owners, etc. properties, and public right of ways. Scale 1 " = 50' ~ 2 Oo
y
2.2 Notify all interested parties of the agreed upon Project Pre-Construction Conference date and 3.8 As work proceeds, inspect all measures after each runoff producing rainfall evenito make sure they time. Allow at least one week of notice before the scheduled conference date so that all can attend. are functioning as intended and make any necessary repairs or modifications. Ensue that all site 2 ~
generated runoff is directed to one of the sediment control measures. Tire site should ahvays be protected F- w~ Z Q
2.3 Attend the Pre-Construction Conference to discuss the project and the erosion control plan. from sediment leaving the site. As the site is brought up to grade, re-0istribute topsoil and begin The party responsible for the installation and maintenance of the erosion control measures should stabil¢ing the cut 8 fill slopes with straw and grass seed in orderto mirim¢ethe erosion ofarry slopes due y
became thoroughly familiar with the approved plan before attending the pre-construction confererxx:. to prolonged exposure. ~ N
The permit will become active at this time. 3.9 As the earthmoving operation progresses, inspect all sedimentation measures and clean out sediment
2.4 Install a rural type mailbox marked "PLAN BOX" at the location near Hwy #55 on the right side of from the measures as necessary to ensure that they continue to perform as designed. Ensure that Hwy ROOTZONE PROTECTION AREA= AREA ~ Z MEASURED IN FEET RADIUS FROM Senior Engineer:
the gravel construction entrance {facing the project site) as shown on the plan. This will provide a 55 and other public roads are kept free of debris and sediment and sweep as necessary. dry location for keeping a copy of the approved erasion control plan on site, as well as a place far the THE TREE TRUNK EQUAL TO THE EROSION CONTROL LEGEND
erosion control officer to leave copies of site reports for the Owner and Contractor. The flag on the 3.10 As the site is stabilized with grass and straw cover, install the remairing channel ~9s as shown to TRUNK DIAMETER IN INCHES & IS K. WRENN
plan box should be raised by the Erosion Control Officer to inform the Owner and conVactorthat ensure no further erosion from concentrated flows. there is a report or correspondence in the box. NO LESS THAN 6' MINIMUM RADIUS TREE PROTECTION FENCE ~ Drawn ; BY
FROM THE TREE TRUNK.
PART FOUR-SiteStabil¢ation STORM DRAINAGE PIPING DATA PART THREE- Installation and Maintenance of Erosion Control Measures 4.1 Graded slopes and fills are to be planted or provided with protective coversulficientto reduce erosion UP TO DOWN UP INVERT INVERT PIPE PIPE IPE LIMITS OF DISTURBANCE ' ' ' ' ' ' ' ' ~ ' ' ~ K. WRENN
3.1 Before beginning any land disturbing activity, post the Land Disturbing Permit and a set ofthe within 30 working days after the completion of any phase of grading. All areas uponwfich ra further land STRUCTURE RIM UPSTREAM DOWN LENGTH DIA. IN LOPE SILT FENCE x ~PE .;,~a0 I ISSUE
Approved Plans in the construction site trailer or office. disturbing activity will be undertaken are to be planted or provided with protective coverwithin 15 working days or 3o calender days (whichever rs less). 2-54"HEADWALLS 260.00 260.00 256.00 438.0 2 X 54 0.91 z I DNERSION DN ~ DIV ~ DIV ~ N0. DATE DESCRIPTION C,
3.2 Begin preparing far the land disturbing activity by installing the gravel construction entrance and 1 • `1'~~: DITCH 1 11 3 ~CT10N REVIEW
silt fence in the area of the driveway and below the master sediment basin. Install the pond primary 4.2 Maintain all erosion control devices until directed to remove them by the Drrham County Sediniertation spillway and channel "A" below the pond spillway. Stabilize the channel vath rip~ap and curled and Erosion Control Officer. OUT-1 TO YCB-1 261.10 258.00 254.00 31.0 36 2.90 / 2 1 1504 CONSTRUCTION REVIEW 0 ,
woad matting and tie the silt fence to the 30" rcp fes as shown. Install the silt fence below the GRAVEL CONSTRUCTION 2~ ~ "r ~ y ROOTZONE CITY OF DURHM
temporary sediment basin. 4.3 When construction is complete and all areas are stabilized, call foronsite inspection by the Durham county sedimentation and Erosion Controlofficer at 5tro-o73s. OUT-2 TO RISER 259.10 254.00 253.53 47.0 24 1.00 PROTECTION EX. TREELINE PROP. TREELINE STREAM BUFFER ENTRANCE ;Q
3.3 Once the pond spillway is completed, choose a period of dry weather and begin clearing the area
around the sediment basin and end wall of the twin 54" rcp culverts. Imrrtediately begin using the 4.4 If the site is approved, remove the temporary measures and seed, pave, aripiap the resulting INLET PROTECTION
pond spillway and master sediment basin by diverting runoff to the basin as the pond dam and berm disturbed areas as required. Make the necessary modifications to the extended detention wetland pond
is constructed. outlet once the site is stabilized so that the permanent function of the pond can begin. Clean out the permanent extended detention wetland pond and grade the pond to design elevations and volumes and RIP-RAP DATE DRAWN FILE NAME
3.4 Install the twin 54" endwall and rip-rap mat and tie the silt fence to the endwall on both sides. revegetate the constructed wetland as shown on the approved construction drawings approved by the city PRWE T 03101.00
Once the twin 54" endwall is installed, begin laying the twin culverts. The stream crossing is of Durham and NCDENR. Install the inlet protection at YCB-1 once the site is seeded and strawed and provided at the first laid section of pipe. Begin clearing the area east of the culverts for the channels are lined leading to YCB-1. This will prevent large amounts of sediment from entering the CHECK DAM LIMITS OF TREE PROTECTION INTERMITTENT
permanent berm and temporary sediment trap. Install the temporary sediment trap and stabilize the extended detention wetland as the site draining to the wetland becomes stabilized with a good stand of DISTURBANCE FENCING STREAM SHEET SIZE: D-SIZE (24) )
outlet with rip-rap as shown by tying the rip-rap to the endwall rip-rap. Divert the runoff to the grass. The channels near the inlet protection will require periodic sediment removal as site stabilization is temporary sediment trap with the permanent berm. achieved. OFFICIAL
TREESAVE AREA SYMBWHATCH SEDIMENT BASIN SHEET
4.5 When vegetation is established, call fora firs site inspection. OF KEY C3A

TOP REBAR RING WELDED HANDWHEEL ACTUATOR FOR OPERATING CASE # D03$58
TO BLIND FLANGE. 4" DIP FL-PE WALL COLLAR NOTE: ALL FEROUS COMPONENTS ARE TO BE NOTE: ALL FEROUS COMPONENTS ARE TO BE TO BE BOTTOM DRAIN VALVE. PROVIDE BRACKET TO NORTH PIN: 0738-03-01-8050 D STABILIZE RISING STEM. Parcel-ID: 541 -02-002
ANCHORED W/ HIGH STRENGTH FULLY BITUMINOUS COATED INSIDE AN OUTSIDE. FULLY BITUMINOUS COATED INSIDE AND _ • • • PORTLAND GROUT. 6"~ X 1/2" STEEL PLATE OUTSIDE. 4.90' INSIDE 4 X 2.5" X 1/4" STEEL BAND FOR MOUNTING TRASH RACK TO
rte; ~ O 5' FOR WELDING REBAR TO. NOTE: SEE DETAIL AT FAR RIGHT FOR DRAIN DRAIN 3 CONCRETE MANHOLE. 8" FLANGED DIP EMERGENCY ~ DRAIN PIPE AND 8"0 FLANGED 4" DIP DRAWDOWN PIPE WITH 2"~ ~
• ~ t • 4" DIP FLANGED ~ 1 2" REBAR TRASH RACK. NO CLEAR ORIENTATIONS RELATIVE TO EACH OTHER. LONG RADIUS ELBOW. / 48"0 CONCRETE PRECAST MANHOLE WITH PLUG VALVE W/ RISER ROD & RESTRICTER PLATE FACING EAST. EXTENDED BASE. PROVIDE DOMED TRASH HAND WHEEL. FACING NORTH. SEE DETAIL TO LEFT.
• • 3O` OPENINGS GREATER THAN 8". • 4" DIP OPENING. RACK (NO OPENINGS GREATER THAN 8") SEE DETAIL TO LEFT.
(HIDDEN) 2.5" X 1/4" STEEL BAND FOR WELDING REBAR TO AND FASTENING TO 48" MANHOLE. 24" NOTCHED WEIR EL. 258.68'. 8•6S'• TOP /SPILLWAY EL. 259.10'.
ATTACH TO 48" MH W/ 1/4` GALVANIZED FACING EAST. WELD 1/2" REBAR DETAIL- (TOP VIEW) SCREWS & LEAD ANCHORS 8" O.C. AS SHOWN TO PROVIDE OPENINGS REBAR PRECAST HOLE TO RECENE 30" RCP. 'ENINGS ~ GROUT WITH NIGH STRENGTH PORTLAND ~
4" DIP DRAWDOWN PIPE NO GREATER THAN s" CLEAR. Z CEMENT GROUT. w ~
INLET W TRASH RACK 8.5" O.C. MAX. SIDE VIEW OF WEIR TRASH RACK. / N J Q CO
" ° 4" DIP DRAWDOWN PIPE WITH 2"4 ~ 2,0' NOTE THAT THE RACK REBAR IS R TRI T R P TE FA IN EXTENDED AND BENT TO PROTECT ^ v ES C E LA C G N E. o WEIR FROM DEBRIS BLOCKAGE. 4" DIP DRAWDOWN PIPE WITH 2"4 ? 47 L.F. 30" CLASS III RCP ®1.00% W MODIFIED
BLIND FLANGE W/ 2"~ ~ PROVIDE WALL ANCHOR COLLAR. RESTRICTER PLATE FACING EAST. } BELL & SPIGOT MEETING REQUIREMENT / g S OF ASTM Wrenn En Ineerin 9 g C76. PIPES SHALL BE CONFINED 0-RING RUBBER
HOLE DRILLED IN BOTTOM INV. AT M.H.- 257.00' INV. AT M.H.- 257.00' W. 1- INV. AT INLET- 256.00' 1 2' REBAR WEIR TRASH RACK. INV. AT INLET- 256.00' TO CONTROL INFLO / ~ GASKET JOINTS MEETING ASTM C-443 AND JOINTS 65.50 Civil Engineering
• - SEE SIDEVIEW ABOVE FOR REBAR PROVIDE TRASH RACK. SEE DETAIL ~9.5"~ ~ OF ASTM C-361. PIPE JOINTS SHALL BE TYPE R-2. r` 24" NOTCHED WEIR EL. 258.67'. Land Planning
• • 1/2" REBAR TRASH PROFlLE. TO LEFT. T RA K. O'C' BASKET REBAR TRASH RACK. • • RACK CAGE. MAX. 2" ORIFICE RASH C SEE DETAIL TO LEFT. FACING EAST. SEE DETAIL TO LEFT. Site Desi n ' 9
OPENINGS. WELD 1/2 REBAR TO 8" FLANGED DIP EMERGENCY BLIND FLANGE AS DRAIN PIPE AND 8"• FLANGED I m°. ' R 30' CP OUTLET PIPE.
• • • SHOWN. NO - 4'0 5" WALL PLUG VALVE W/ RISER ROD W/ 1 FILL MANHOLE W CLASS 3 CONCRETE SEE DETAIL TO LEFT. /
4" DIP OPENING. OPENINGS GREATER DETAIL (SIDEVIEW) THICKNESS HAND WHEEL. FACING NORTH. THAN 2". 4" DIP DRAWDOWN PIPE INV.- 257.00'. usE LEAN ° ~ (HIDDEN} w~... TO ELEV. 254.00' FOR ANTI-FLOTATION. ~ ~ ` ~ + USE LEAN PORTLAND GROUT INSTEAD DETAIL- TOP VIEW OF RISER WRENN ENGINEERING CO.
PORTLAND GROUT TO 4" BELOW ~ y ~ ~ OF CONCRETE WITHIN 4" OF DRAIN SHOWING DRAIN ORIENTATIONS 1910 SEDWICK RD.
DETAIL- (BOTTOM VIEW) & AROUND VALVE FOR FUTURE 4" DIP DRAWDOWN PIPE INLET W/ 2" MAINTENANCE INSTEAD OF .83' VALVE FOR MAINTENANCE. StllTE 200-C REQUIRED VOLUMES FOR EXTENDED DETENTXkI NETLAND DURHAM, NC 27713
RESTRICTER PLATE & TRASH RACK. PouRINC coNRETE FLUSH ro TRASkRACK BLOWUP SCALE 1" = i' TRASHRACK BLOWUP SCALE 1" = 2' ypLyE, BLOWUP S MONOLITHIC EXTENDED MANHOLE BASE. BLOWUP SCALE 1 " = 3' BOTTOM ELEV. 251.60'. ELEV. FOREBAY MAMI POND ACCUr, vauME SEDIMENT POND INFORMATION DIMENSIONS E L EV {919) 806-5082
NOTES: 9i9 806-5083 fax z53.ao ~ zs~ ~au~ ~~o EMERGENCY SPILLWAY 16', 3:1 S.S. 260.0' { )
1. DURING CONSTRUCTION THE RISER WILL BE 4. THE EXTENDED DETENTION WETLAND WILL BE SURROUNDED WITH WASHED STONE TO SERVE AS A USED AS A TEMPORARY SEDIMENT CONTROL BASIN 254.00 362 eel o TOP OF DAM WIDTH 10' 261.0' WWW.WRENNENG.COM 255.00 522 1165 1471
CLEAN BASIN OUT TO DESIGN VOLUME AFTER SEDIMENT FILTER BEFORE THE WATER ENTERS THE RISER DURING CONSTRUCTION AND MUST BE CLEANED 24" NOTCHED WEIR EL. 258.68' z55.5o etz 1322 2376 ANTI-SEEP COLLAR
TEMPORARY SEDIMENT MEASURE IS REMOVED. AND OUTLET PIPE, OUf, VEGETATED, AND OPERATIONAL PRIOR TO uSE AS A WET DETENTION BASIN AND BEFORE ANY zs6.oo 709 3e13 3940 N A N A 256.25 1171 a77z 5~3 RIP RAP DISSIPATOR PAD RIPRAP LINED CHANNEL
2. THE 4"0 DRAWDOWN PIPE, THE 24" WEIR ,AND THE PERMANENT BUILDINGS ARE OCCUPIED. 48"~ 48"~ CONCRETE PRECAST MANHOLE WITH EXTENDED z5e•5o 1239 5489 Bea 258.75 1306 Sees e558 ANTI-FLOATATION DEVICE 4'~ X 1.81' 254.0'
#57 WASHED STONE TO ELEV. 48"0 RISER ARE TO HAVE A PERMANENT TRASH RACK 4 DIP DRAWDOWN PIPE WITH 2 ~ MOUNTED TO EACH OPENING TO PREVENT DEBRIS FROM 5. OVEREXCAVATE 12" DEEP ALL AREAS " BASE 257.0'. ENCIRCLE ENTIRE ENTERING. THE OPEN AREA OF EACH ORIFlCE'S TRASH ASSOCIATED WITH WETLAND PLANTING PLAN AND RESTRICTER PLATE. BASE. PROVIDE DOMED TRASH RACK (NO OPENINGS 257.00 1319 8220 106 TOP OF RISER 48" MANHOLE 259.1'
RISER WITH STONE FILTER. RACK MUST EXCEED THE ORIFICE AREA TO PREVENT FLOW REPLACE WITH ORGANIC TOPSOIL STOCKPILED FROM GREA RESTRICT 8" BOTTOM DRAIN TO RESTRICTION. SEE DETAILS. SITE. SEE SHEET W01. INV. AT M.H.- 257.00 SPILL GREATER THAN 8"~ ELEV. FOREBAYB ACCUMVOLUME
6 1/2" DIAMETER AND COVER INV. AT INLET- 256.00' SPILLWAY EL. 259.10 MAIN POND ~c.F.l OUTLET PIPE INVERT IN 30" RCP 254.0' 257.50 1(0313 15647 OUTLET PIPE INVERT OUT 30" RCP 253.53'
W/ CHICKEN WIRE {1/2" (~1.0 3. THE 30" BARREL IS CLASS III RCP, MODIFlED BELL AND 6. OVEREXCAVATE THE MICRO POOL AND FORBAY OPENINGS) TO PREVENT WASHED SPIGOT, MEETING THE REQUIREMENTS OF ASTM C76. PIPE TO OW IOFOR2SEDIMENTATIONLOOLDMEIGN GRADE) z~:o iii7e 2BB95 SEDIMENT STORAGE AREA 10,298 S.F. 257.50'
STONE FROM ENTERING HOLE. JOINTS SHALL BE CONFlNED 0-RING RUBBER GASKET JOINTS MEETING ASTM C-443 AND JOINTS OF ASTM C-361. zse.6e 1200, 2ee35
PIPE JOINTS SHALL BE TYPE R-2. 10.00' 259.00 12476 32752 26o.oD 14aa 459e3
3. •1 DAM EL. 261.0' ~ 16' WIDE EARTHEN BROADCRESTED WEIR
EX. GROUND - EMERGENCY SPILLWAY ELEV. 260.0'. LINE 20 L.F. OF DITCH
- PROFILE (VARIES I- - ~ - - > - - •1 - - I I - - :;I;,,, 30 RCP FES W/ RIP-RAP. BRING
- - - - _ - SEDtMEi4T -STORAGE-- TO---ELfV.-2-57.5 _ _ . - ~ I- - - - `i:. - - I ~ ~ _ 3'1 ELEV. 253.53. RIP-RAP UP TO ELEV. ~ ~
- - - - ~Q - - _ 255.53'. SEE PLAN. ~ Kv;~,
SEDIMENT STORAGE VOLUME- 13,323 C.F. - - 47 L.F. ~ 47 L.F. 30 RCP ®1.00% W E - - -
CD1A - POND INVERT EL. 254.0' TIGHT 0 SECTION THROUGH STONE OUTLET AFTER - - - TIGHT 0-RING GASKETTED CT N - r - - ~
N~~,~
C3A scncE = 5' SEE PLANTING PLAN FOR WETLAND PLANTING SCHEDULE FOR BASIN. - - 1 L
8" BOT. DRAIN & VALVE EL. 254.00'. - 30" - -
- - I NVI 30 RCP OUTLET ~-~o.oo' g~1°=~~.., INVERT EL. 254.0' CORE OF DAM TO BE SELECT LOW PERMEABILITY CLAY
MATERIAL AND COMPACTED TO 98~ DRY DENSITY. WHERE
NOTES: SECTION THROUGH SEDIMENT BASIN EXTENDED BASE OF so' MIN. „ NOTE: SEE DETAIL AT UI CORE IS IN CUT, VIRGIN MATERIAL MAY BE LEFT IN PLACE IF o 0 DETAIL AT UPPER RIGHT ~ o
BUT SUFFICIENT TO KEEP 1. PUT SILT FENCE OR TREE PROTECTION FENCE UP C3A SCALE 1 = 6 PRECAST MANHOLE, CONC. FOR DRAIN ORIENTATION`. ORIENTATIONS RELATIVE DETERMINED TO HAVE ADEQUATE CONSOLIDATION & o I
SEDIMENT ON SITE TO ENSURE CONSTRUCnON ENTRANCE IS USED. ~ _ BASE EL. 251.60 TO EACH OTHER. PERMEABILITY BY FIELD ENGINEER. ~ N THER. I o
2. IF CONSTRUCnON ON THE SITES ARE SUCH niAT THE MUD IS NOT REMOVED BY THE VEHICLE TRAVEL- col
, LNG OVER THE STONE, 1HEN THE TIRES OF THE d ,2 -3 STONE TO BE USED`:... 25' OR NIDTH OF WASHED BEFORE ENTERING THE EXISTING ;-';(SURGE STONE OR RAIlROAD~,: PROPOSED STREET, VEHICLES MUST BE I h
PUBLIC ROAD. ~ I 5 FT HWY 4'55`• .BALLAST)' > ; ..;r,., WIiICHEVER IS i MIN ~ ; GREATER. 3. IF A PROJECT CONnNUES TO PULL MUD AND DEBRIS 0~ ~ O ~ p SPILLWAY SLOPED ®1.0% ~ I ~ ~ 3 , TOP OF DAM O ~ •
' ~ 1.5 FT ON TO THE PUBLIC ROAD, THE GOVERNING AUTHORIN - 1 ` 1.0' DEPTH 3. EL. 261.0' O ~ O
WILL CLEAN THE AREA AND INVOICE 7HE FlNANGALLY - ~ ~ RESPONSIBLE PERSON AS INDICATED ON of FlNANGAL NOTES: 1800 CU FT/ACRE ~ g~ GRASS LINED SPILLWAY EL. 260.0' I ~s ~ ~ ~ O
RESPONS~uTY FARM. ~ o p~ 5 FT ~'7 MAX 411 ~ r. ~ ~ W V
1. USE FOR DRAINAGE AREAS o NOT EXCEEDING 5 (FlVE) ACRES. ]2" MIN, o ~o ~ I ~ T~' :TRAREZOIDAL v,'EiP ~ U ~ ~
PLAN Q ~
2. EARTH BERM SHALL BE STABILIZED w/ SEEDING ACCORDING TO TRIANGLE SPECIFlCATIONS. FILTER J
CROSS SECTION FABRIC _ Q
NEw cortsTRUCnoN 3. USE CLEAN COMPACTOR FILL MATERIAL FOR EARTH BERM. as' WN. i5' MIN. ~ OVERFlLL 6" _ PERMANENT SPILLWAY LINING: LINE EMERGENCY SPILLWAY UP TO ELEV.
EXISTING ROADWAY DESIGN FOR SETTLEMENT SETTLED I 260.50' WITH TURF REINFORCEMENT
- t2' Mx. i TOP 21" I 1r CD1C MATTING RATED AT 8.0 LB/S.F. LINE J J POND EMERGENCY SP!lLWAY SPILLWAY INSIDE AND OUTSIDE OF POND.
< V ' ~ MIN ~-1 I 6" MIN. - _ ~ 1' FREEBOARD ,.m~II~II~IBII~I ~Y PER P TI O C3A SEC VE NEW a
Q 11I~i1-II I I Ik; I ~ I =ill p.,_ I~ I hT~ _ - 8-ob o
ABRIC UNDER STONE ~ 1.5 FT - C~° 10 FT MIN ~ ~ Ili II _ ~ 1- 2:1 SIDE W
I~~~II-11 ° °0P'~ o~ oo ~I~ ~ SLOPE MAX 5 FT ' 1=III-11 ~0~ ' ° 08 -11' r 0 ~ U
CD2 GRAVEL CONTRUCTION ENTRANCE CROSS SECTION ~ MAX FILL - og0 0 ~ o~ o - I r -IIII~II- ~o~~~oo~~~l r
C3A FILTER _ $ o~ ~ 1:1 SIDE SLOPE I ~ z 0
FABRIC 'i=III ~~~o~o I-_r MAX fNATURAI --___-._~____!~.1L °0 X111=
~3 FT GROUND MIN 8' MAX, ~ O VARIABLE AS DIRECTED BY THE ENGINEER
MAINTENANCE
NOTE: THIS DETAIL APPLIES ONLY TO YCB-1. INSPECT TEMPDRaRY SEmMENT TRAPS AFTER EACH PERIOD OF SIGNIFlCANT RAINFALL REMOVE SEDIMENT AND RESTORE TRAP TD ITS ORIGINAL I I
TOP OF SILT FENCE ELEVATION = gMENSIONS WHEN THE SEDIMENT HAS ACCUMULATED TO ONE-HALF THE DESIGN DEPTH OF THE TRAP. PLACE THE SEDIMENT THAT IS REMOVED IN A DESIGNATED gSPOSAL AREA AND REPLACE THE Cg9TAMINATED PART OF THE GRAVEL FACING. ~ i I MN. 12-if2 GA.
262.10'ANDIS0.50'BELOWBERM. STANDARD METAL POSTS 2'-O" IN GROUND LEAVE INLET TOP BLOCK WORK LOW IN CHECK 1HE STRUCNRE FOR DAMAGE FROM EROSION OR PIPING. PERIOgCALLY CHECK THE DEPTH Cf 1HE SPILLWAY TO ENSURE IT IS A MINIMUM ------+----'-----------~-------I---'----- - INTERMEDIATE YIN. 10 CA. Wig llE WIRES Z
ORDER TO MEET REQUIRED GRAVEL CD~ TEMPORARY GRAVEL & RtPRAP B,4SIN q" ~ T•5 FT BELOW 1HE LOW POINT OF THE EMBANKMENT. IMMEDIATELY FlLL ANY SETTLEMENT OF THE EMBANKMENT TO SLIGHTLY ABOVE DESIGN GRADE. ANY PoP RAP gSPLACED FROM THE SPILLWAY MUST BE REPLACED IMMEDIATELY. - FENCE fA6RIC ALLED TO 5EC01N1
FILTER THICKNESS. TEMPORARY INLET GALVINIZED •~A TOP ELEV. -261.1' MAX. STABAJZE THE EMBANKMENT AND ALL DISTURBED AREAS ABOVE THE SEgMENT POOL AND DOWNSTREAM FROM THE TRAP IMMEDIATELY AFTER -R7P---,-----+-
HARDWARD WIRE CONSIRUCTKMI WITH SEEDING. EXTENDS TO GRADE - - W
TOP OF BOX ~ / J W
J Q
~
_ ~ ~ TOP OF SEDIMENT STORAGE CULVERT ac F.E.S. FRONT VIEW
( ELEV. 260.50 ( HADED AREA 7
I WITHIN DASHED LINE) - STEEL PosT ~
/ MELDED WRE FARRIC
' / SILT FENCE GEOIEXMIE FABRIC y tlQS:
/ / / TEMPORARY SEDIMENT BASIN "A" . -USE SIT FFIICE ONLY WHEII DRANAGE AREA o c
LOCATED EAST SIDE OF DOUBLE 54"CULVERT. F.E.S. RIP RAP LAYER z DOES Nor Excr:m 1/a ACAE AND NEVER M I ~ ~ s<o~ 3 (SEE PLAN FOR J ~ ~r~+TRAho FLa M ~ ~ ~
/ / YCB-1 DA= 3.07 AC., DIST. D.A.= 2.85 AC. FLOW RIP-RAP CLASS) z L a = "FOR REPNR OF SILT J -END OF SIT FENCE NEEDS TD ff TURNED IIPMML FENCE FAILURES, USE ~ 0_ W a No. 57 WASHED STONE
- / / / REQ. VOL= 5130 C.F. 1 800 C.F./DIST-AC.IYR. 11 ) 1\__ ~ D W n -GRADE FOR ANCHOR WNEN 51LT W ~ FENCE IS PROTECTING L ~ _ CATCH BASK. Z
T / / REQ. S.A.= 001 X 10.9 CFS= 0.109 AC. 4 748 S.F. 1 - ( ) 8 NR. C01fR SEE PLAN 1 OVER SNRT ~ O "
~ LENGTH TO WI DTH RATIO > OR = TO 2.0 h~ / ~ ~ / FLTER FABRIC - CD7 N SILT FENCE - ANaiDR SaRr As ~
v v t ~ ''I ~ J / BASIN DESIGN SA AND VOL DATA PROFILE VIEW W DIRECTED BY ENGINEER' } C3A
J V ~ ~ ~`d ~ ELEV. AREA ACCUM. VOL. SEE PLAN W 1 SIDE VIEW 0 p
CD9 # 57 WASHED STONE PLACED TO A HEIGHT 0 / - INLE7 PROTECTION OF 12"-18" MIN. ABOVE TOP OF BOX ~ Q ~ 258.5' 465 S.F. 0 C.F. V / ~ RIP-RAP AP PLAN VIEW N ~ RON
C3A Q' / 259.0' 912 S.F. 344 C.F. _ ~ ~
/ 260.0' 2,342 S.F. 1,971 C.F. C3A Z Q ti
/ 260.5' 4,639 S.F. 3,716 C.F. / 261.0' 4 965 S.F. 6117 C.F. / ~ , Oo y
~ /
~o~ REH~ aR ~ x"10 / / 11' WIDE EMERGENCY REWOVE TREE IT uOAE SEQUENCE: / ,HAN ioz or A TREes i. oeTaN APPROPRUTE PERwTS / - SPILLWAY, ELEV. 261.0'. O _ TOP ELEVATION OF STORMWATER Qi Z i
cRmcu RooT utEA 2. HOLD A PRECONSTRUCIKW CONFERENCE MATH THE LANDSCAPE PROTECIKRI SUPERMSOR, / Is uNRaDTECTED. 0 ARCHITECT OR LANDSCAPE ARCHTECT ANO URBAN FORESTER. cTED CORSIRIIC110N / 0-10YR =10.9 CFS. ,~~1 /57 WASHED < 2/3 W TYPICAL PoP RAP CHANNEL STONE 1 MAX' A Senior En Ineer: ~ 9
3. ERECT TREE PROTECTION FDVCING / 4. CLEAR AND GRUB TREES AID SHRUBS TO BE REMOVED / 5. INSTALL SOIL AND EROSION CONTROL MEASURES / ~ / f:1 f r=,. f 1:~=:' rt ::I1 11~,"r ~ ~ DESIGN OF $PILLWAYS -~ir~„i,~;;~- vi
tiETIIN 6. ROUGH GRADE 9TE 7. EXCAVATE FOR FOOTINGS, MSTALL UTILITIES AND CONSTRUCT BUILDNG ~ i.;., is ~ I-, . K. WRENN 4 - w ~ EXISTNG SLOPE '~~~1~` - 4° ~ ~--;I- DRAINAGE AREA NOR LENGTHI : ~f ;-it1 .'~~51
8. FlNISH FlNAL CRAgNC AND PAVING / \ ~ ~ 18° I ---'-i 9. REMOVE TREE PROTEC110N FENCING ~ - R00 TORE 10. INSTALL LANDSCAPING ~ / ! 1 g" - I ~ _..I,L. ' ~ I ~ (ACRES) {FT) CLASS 1 RIP-RAP FILTER FABRIC ~y 8^ r I~ I 1 ( ~I I 1'~ )il_-i~= 1 4.0 IJiaWn
0 MOVE ~ 0 oR REw~ \ / `-"j,~-FILTER FABRIC OR 2 60 VARIES GRAVEL BEDDING FlLTER FABRIC OR 3 8.0 K. WRENN
p TREE ~ v GRAVEL BEDDING 4 10.0
~ PARABOLIC-SHAPED Can ZONE o 30LIC-SHAPED WATERWAY WITH STONE CENTER DRAIN TRAPEZOIDAL 1 DIMENSIOINS SHOWN AREi1NNIMUM I ~ W ISSUE (SHAPED BY BULLDOZER)
NOTES: 1. R00T PRUNE TREES TO REMAIN NHERE CONSTRUCTION ACRNRES HILL SEVER ROOTS. PERM ExlsnNC SLOPES NOTe NO. DATE DESCRIPTION
2. ANY TREE ROOT5 EXPOSED BY CONSTRUCRON SHALL BE SEVERED CLEANLY'MTH A I- ANENT BER PRUNING TOOL. M TO BE USED WHERE EXCESSIVE STORMWATER _ r-- ~ HEI T W1 TH ~ ~ ~ 3 O4 CONSTRUCTION REVIEW VELOCITIES PROHIBIT VEGETATIVE LRMIGS. ~I„ GH & D DETERMINED BY
3. DO NOT DISPOSE OF ANY CHEMICALS OR REMOVE SOIL IXIISIDE 1HE LIMITS OF WtlRK. ~~TM ~ ~ ~ Ems,,,, ~,mi~pR+~WAI 4. WHEN INSTALLING NEW LANDSCAPE PLANTS, DO NOT DRIVE EQUIPMENT UPON OR "'~'~A ~5,~ - EXISTING TOPOGRAPHY AND Z ~ 15 O4 CONSTRUCTION REVIEW SIZE OF STONE MUST BE DETERMINED BY y~ I~I = SEDIMENT STORAGE REQUIRED. L ~ 1,. ~
DISTURB THE SOIL WITHIN THE CPoTICAL ROOT ZONE OF DfISTING TREES. 5. AT THE START OF GRADING INVOLVING THE LOWERING OF EXISRNG GRADE AROUND A' STEEL Pos To . YACNC rAbuuN ATREE CR STRIPPING OF TOPSOIL, A CLEAN, SHARP, VERTICAL CUT SHALL BE W APPROPRIATE DESIGN PROCEDURE. ~ ~r~ ~ ~ ,a KEY RIP RAP INTO THE DAM
MADE AT THE EDGE OF THE TREE SAVE AREA AT THE SAME TIME AS OTHER '1j-' I ~--1 `1-' EROSION CONTROL MEASURES ARE INSTALLED. THE TREE PROTECTON FENGNG I~ --nl-; FOR STAEIIUZAnON. I " T 1 ~i l'( DIMENSIONS FOR d & W VARIES ACCORDING ~F ilE. ~~I Vii;-,tl` d ~ 1 i-fi.~L,.I- L.-_, TO DESIGN. _I_
SHALL BE INSTALLED ON THE SIDE OF THE CUT FARTHEST AWAY FROM THE TREE ~,p-_-)Ir_. TRUNK, AND SHALL REMAIN IN PLACE UNTIL ALL CONSTRUCTION IN THE VICINITY - ~ ~ ~ ~ - - 18` .:~;I:-- 18° ) r:l-'-- ~ RIP RAP DEPTH AS PER DESIGN OR REFER TO u~ -
OF THE TREEC IS OOMPI FTF. NO STORAGE OF MATERIALS. FlLL. OR EQUIPMENT _ ~ ,I - I i I ~I,- .
AND NO TRESPASSING SHALL BE ALLOWED WITHIN THE BOUNDARY OF THE 6' PROTECTED AREA. - - - - 6- IAULL. e c Ktrtu mr KAr FlL1ER FABRIC OR ~ RLE
6, THE ROOT PROTECTION ZONE IS AN AREA THAT COVERS 1' RADIUS FROM THE "NO TRESPASSING VATI*N TREESIU4 Me SIGHS TO BE NSTAUEO ON 1REE PODIECUN GRAVEL BEDDING j e.: a da:}a:S7 a TA LE
TRUNK FOR EACH 1" CALIPER OF THE TRUNK. FENCING AT A MAMM1M OF 75 0.4 7. WHERE BOTH TREE PROTECTION FENCING AND SILT FENCING ARE REQUIRED, THE WRITTEN N BOTH SPANISH AND ENFA9L TREE PROTECTION FENCING SHALL BE INSTALLED CLOSEST TO THE WOODLINE. V-SHAPED WATER /57 WASHED STONE SHAPED WATERWAY WITH STONE CENTER DRAIN 'STONE CLASSIFICATION RIP RAP DEPTH: i PROJECT: 03101.00
8. TREE PROTECTION FENCE TO BE MARKED EVERY 75 TO 100 FEET APART WITH (SH) SIGNAGE IN BOTH SPANISH AND ENGLISH SAYING "KEEP OUT" (SHAPED BY MOTOR GRADER) 4 J" FRONT VIEW_ - B 18" , SHEET SIZE: MIN 446')
CLASS 1 24" Exrsn `
CLASS 2 24"-36 NG SLOPE -
TREE PROTECTION FENCING CD4 TEMPORARY GRAVEL & ROW BASIN A" CD6 RIP-RAP L CD3 RIP-RAP LINED CHANNELS ( ROCK CHECK DAN STEP SEQUENCE SHEET
~C3A SCALE I" = 20' ~A C3A 3A OF RIP RAP LINED CHANNELS qA C3B_

/-2-54" RCP CULVERTS INLET.
MITERED HEADWALL ELEV. 260.00'
HEADWALL & 16'X 8`RIP-RAP MAT
d50=9", d= 23", LINE W/ FABRIC.
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=
- = . .
OFFSITE DA TO EXTENDED DETENTION WETLAND VIA YCB-1 = 0.210 AC.
TOTAL DA TO EXTENDED DETENTION WETLAND = 5.866 AC.
X IMPERVIOUSNESS OF 7.36 AC. SITE = 3.83%
PHASE 2
ONSITE DA TO EXTENDED DETENTION WETLAND BYPASSING YCB-1 = 0.570 AC.
ONSITE DA TO EXTENDED DETENTION WETLAND VIA YCB-1 = 5.539 AC.
OFFSITE DA TO EXTENDED DETENTION WETLAND BYPASSING YCB-1 = 0.000 AC.
OFFSITE DA TO EXTENDED DETENTION WETLAND VIA YCB-11 = 0.028 AC.
TOTAL DA TO EXTENDED DETENTION WETLAND = 6.137 AC.
IMPERVIOUS AREA TO EXTENDED DETENTION WETLAND = 5.180 AC (INC. 0.028 AC. OFFSITE)
% IMPERVIOUSNESS OF 7.36 AC. SITE = 70.0%
% IMPERVIOUSNESS TO EDW = 84.40%, SA/DA = 3.5272.
EDW SURFACE AREA REQUIRED = 0.2165 AC. (9,431 S.F.)
EDW SURFACE AREA PROVIDED = 0.2204 AC. (9,599 S.F.)
PLANTING GUIDELINES FOR WETLAND PLANTS:
OVEREXCAVATE 12" DEEP ALL AREAS ASSOCIATED WITH WETLAND
PLANTING PLAN AND REPLACE WITH ORGANIC TOPSOIL STOCKPILED
FROM SITE.
COLLECT TOPSOIL AND HERBACIOUS VEGETATION SAMPLES (SEEDBANK)
FROM WETLAND AREAS FROM ONSITE AND/OR NEARBY OFFSITE FOR
REDISTRIBUTION INTO THE CONSTRUCTED WETLAND TO INTRODUCE A
DIVERSE ARRAY OF LOCALLY ADAPTED WETLAND PLANTS AND OTHER
ORGANISMS INTO THE CONSTRUCTED WETLAND. DISTRIBUTE THESE
"SEEDBANK" SAMPLES INTO THE AREAS SHOWN ON THE CONSTRUCTED
WETLAND PLANTING PLAN DETAIL.
SWITHGRASS- MECHANICAL BROADCASTING OVER SCARIFIED 12"
TOPSOIL ABOVE ELEVATION 258.0'. DO NOT APPLY LIME. PROVIDE
MULCH & NETTING COVER. PROVIDE TEMPORARY COVER TO PREVENT
EROSION WHILE SWITCHGRASS IS ESTABLISHING.
BUTTON BUSH- PLANT IN EARLY SPRING ONCE THE EXTENDED
DETENTION WETLAND IS HOLDING WATER.
BLUE FLAG IRIS- PLANT EITHER PLUGS (18"i OR SEEDS (12-0)
DEPENDING ON AVAILABILITY AND SEASON OF PLANTING. PLUGS ARE
USUALLY AVAILABLE IN EARLY SPRING. PROVIDE NEUTRAL ph PLANTING
SOIL BY LIMING IF NECESSARY. PLANT ONCE THE EXTENDED
DETENTION WETLAND IS HOLDING WATER.
PLANT MATERIAL LIST
GRAY'S SEDGE- PLANT PLUGS 4'0 AT ELEVATION 257.25' ONCE THE
EXTENDED DETENTION WETLAND IS HOLDING WATER. DO NOT APPLY
LIME.
COMMON THREE SQUARE- PLANT PLUGS 4'0 AND 8'0 AT ELEVATION
256.75' ONCE THE EXTENDED DETENTION WETLAND IS HOLDING WATER.
DO NOT APPLY LIME.
SOFT STEM BULLRUSH- PLANT PLUGS 4'0 AT ELEVATION 256.50' ONCE
ON WETLAND IS HOLDING WATER. DO NOT APPLY
LIME.
DUCK POTATO- PLANT TUBERS 4'0 AT ELEVATION 256.50' ONCE THE
EXTENDED DETENTION WETLAND IS HOLDING WATER. DO NOT APPLY
LIME.
WOOL GRASS- PLANT PLUGS 4'0 BETWEEN ELEVATIONS 257.00' &
257.25' ONCE THE EXTENDED DETENTION WETLAND IS HOLDING WATER.
DO NOT APPLY LIME.
AMERICAN LOTUS- PLANT RHIZOMES AT ELEVATION 254.00' ONCE THE
WATER LEVEL IN THE EXTENDED DETENTION WETLAND REACHES
ELEVATION 255.50'. �
PICKERAL WEED- PLANT RHIZOMES 4'0 AT ELEVATION 256.50' ONCE
THE EXTENDED DETENTION WETLAND IS HOLDING WATER. PROVIDE
OIL BY LIMING IF NECESSARY.
LAWN
PlushTex
Turf -Type Tall Fescue Mix
MATTING TO 24" DEPTH.
8 LB/S.F. SHEAR RATING.
b FS
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X -SECTION PERMANENT CHANNEL 'i (TRAPEZOID) ,X
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=
- = . .
OFFSITE DA TO EXTENDED DETENTION WETLAND VIA YCB-1 = 0.210 AC.
TOTAL DA TO EXTENDED DETENTION WETLAND = 5.866 AC.
X IMPERVIOUSNESS OF 7.36 AC. SITE = 3.83%
PHASE 2
ONSITE DA TO EXTENDED DETENTION WETLAND BYPASSING YCB-1 = 0.570 AC.
ONSITE DA TO EXTENDED DETENTION WETLAND VIA YCB-1 = 5.539 AC.
OFFSITE DA TO EXTENDED DETENTION WETLAND BYPASSING YCB-1 = 0.000 AC.
OFFSITE DA TO EXTENDED DETENTION WETLAND VIA YCB-11 = 0.028 AC.
TOTAL DA TO EXTENDED DETENTION WETLAND = 6.137 AC.
IMPERVIOUS AREA TO EXTENDED DETENTION WETLAND = 5.180 AC (INC. 0.028 AC. OFFSITE)
% IMPERVIOUSNESS OF 7.36 AC. SITE = 70.0%
% IMPERVIOUSNESS TO EDW = 84.40%, SA/DA = 3.5272.
EDW SURFACE AREA REQUIRED = 0.2165 AC. (9,431 S.F.)
EDW SURFACE AREA PROVIDED = 0.2204 AC. (9,599 S.F.)
PLANTING GUIDELINES FOR WETLAND PLANTS:
OVEREXCAVATE 12" DEEP ALL AREAS ASSOCIATED WITH WETLAND
PLANTING PLAN AND REPLACE WITH ORGANIC TOPSOIL STOCKPILED
FROM SITE.
COLLECT TOPSOIL AND HERBACIOUS VEGETATION SAMPLES (SEEDBANK)
FROM WETLAND AREAS FROM ONSITE AND/OR NEARBY OFFSITE FOR
REDISTRIBUTION INTO THE CONSTRUCTED WETLAND TO INTRODUCE A
DIVERSE ARRAY OF LOCALLY ADAPTED WETLAND PLANTS AND OTHER
ORGANISMS INTO THE CONSTRUCTED WETLAND. DISTRIBUTE THESE
"SEEDBANK" SAMPLES INTO THE AREAS SHOWN ON THE CONSTRUCTED
WETLAND PLANTING PLAN DETAIL.
SWITHGRASS- MECHANICAL BROADCASTING OVER SCARIFIED 12"
TOPSOIL ABOVE ELEVATION 258.0'. DO NOT APPLY LIME. PROVIDE
MULCH & NETTING COVER. PROVIDE TEMPORARY COVER TO PREVENT
EROSION WHILE SWITCHGRASS IS ESTABLISHING.
BUTTON BUSH- PLANT IN EARLY SPRING ONCE THE EXTENDED
DETENTION WETLAND IS HOLDING WATER.
BLUE FLAG IRIS- PLANT EITHER PLUGS (18"i OR SEEDS (12-0)
DEPENDING ON AVAILABILITY AND SEASON OF PLANTING. PLUGS ARE
USUALLY AVAILABLE IN EARLY SPRING. PROVIDE NEUTRAL ph PLANTING
SOIL BY LIMING IF NECESSARY. PLANT ONCE THE EXTENDED
DETENTION WETLAND IS HOLDING WATER.
PLANT MATERIAL LIST
GRAY'S SEDGE- PLANT PLUGS 4'0 AT ELEVATION 257.25' ONCE THE
EXTENDED DETENTION WETLAND IS HOLDING WATER. DO NOT APPLY
LIME.
COMMON THREE SQUARE- PLANT PLUGS 4'0 AND 8'0 AT ELEVATION
256.75' ONCE THE EXTENDED DETENTION WETLAND IS HOLDING WATER.
DO NOT APPLY LIME.
SOFT STEM BULLRUSH- PLANT PLUGS 4'0 AT ELEVATION 256.50' ONCE
ON WETLAND IS HOLDING WATER. DO NOT APPLY
LIME.
DUCK POTATO- PLANT TUBERS 4'0 AT ELEVATION 256.50' ONCE THE
EXTENDED DETENTION WETLAND IS HOLDING WATER. DO NOT APPLY
LIME.
WOOL GRASS- PLANT PLUGS 4'0 BETWEEN ELEVATIONS 257.00' &
257.25' ONCE THE EXTENDED DETENTION WETLAND IS HOLDING WATER.
DO NOT APPLY LIME.
AMERICAN LOTUS- PLANT RHIZOMES AT ELEVATION 254.00' ONCE THE
WATER LEVEL IN THE EXTENDED DETENTION WETLAND REACHES
ELEVATION 255.50'. �
PICKERAL WEED- PLANT RHIZOMES 4'0 AT ELEVATION 256.50' ONCE
THE EXTENDED DETENTION WETLAND IS HOLDING WATER. PROVIDE
OIL BY LIMING IF NECESSARY.
Wrenn Engineering
Civil Engineering
Land Planning
Site Design
WRENN ENGINEERING CO.
1910 SEDWICK RD.
SUITE 200-C
DURHAM, NC 2771J
[phone]
(919) 806-508J fox
WWW.WR8VNEJVG.00M
F OR RE14EW ONL Y
NOT FOR CONSTRUCTION.
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PlushTex
Turf -Type Tall Fescue Mix
Ground Cover
Seed
As required
5 lbs./lOW Sq. R., 10-10-10 fertilizer 25 lbs/1000 s.f., pellet lime 50 lbs/10)0 s.f.
FK
Festuce orundinacea
Kentucky 31 Fescue
Shade Tolerant Ground Cover
Seed
All grass channels 5 lbs./1000 Sq. Ft, 1 -10-10 fertilizer 25 lbs/1000 s.f., pellet lime 50 lbs/1000 s.f.
I
W
M
*_1
SB
Various Volunteers from Onsite/Offsite Seedbonk
Wetland Plants / Soil Samples
Shovel Full
.
150 Samples
Dist6bute seedbank specimens over enVire shaded area 0 4' o.c. (2,390 S.F.)
z
PV
Panicum vergaturn
Switch Gross
Perimeter
Seed
1 lbs
Broadcast as shown above elevation 258.0' (3,655 S.F.)
(n
0
____
-
0
CO
Cephalanthus occidentalis
Button Bush
Emergent Shrub
Plugs or I Gal.
6
Plant as shown at elevation 257.50'
z
LO
*
IV
Iris virginiona
Blue Flag Iris
Emergent
Peat Pots or Seeds
60 or 120
Plant 18"O (plugs) or 12"O (seeds) in groupings as shown at elevation 257.25'
I -
z
*
CG
Carex grayi
Gray's Sedge
Perimeter
Plugs
54
Plant 4'0 as shown at elevation 257.25'
<
1
-
*
SP
Scirpus pungens
Common Three Square
Emergent Gross
Plugs
118
Plant 4'0 and 8'0 as shown at elevation 256.75'
CL
*
SV
Scirpus validus
Soft -Stem Bullrush
Emergent Grass
Plugs
52
Plant 4'0 as shown at elevation 256.50'
0
z
*
1
5L
Sagittaria lancifolia
Duck Potato
Emergent
Tuber
145
Plant 4'0 as shown at elevation 256.50'
<
-
J* .
SIC
.
Scirpus cypennus
Wool Gross
. Emergent Grass
Plugs
96
Plant 4'0 as shown between elevations 257.00 - 257.25'
_j
I-
W
I
0 I
NL
Nelumbo lutea
i A erican Lotus
I Emergent :1
Rhizomes
8
1 Plant s shown at elevation 254.00'
3:
1
X I
PC
Pontederiia cordata
I Pickeral Weed
I Emergent
I Rhizomes
51
1 Plant 4'0 as shown at elevation 256.50' 1
Wrenn Engineering
Civil Engineering
Land Planning
Site Design
WRENN ENGINEERING CO.
1910 SEDWICK RD.
SUITE 200-C
DURHAM, NC 2771J
[phone]
(919) 806-508J fox
WWW.WR8VNEJVG.00M
F OR RE14EW ONL Y
NOT FOR CONSTRUCTION.
�'­-;;_,_-;! "i
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Senior EngIneer:
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Drciwn By:
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ISSUE
/1/------',._.. .1, %, %. ... NO. DATE DESCRIPTION
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EX. TREELINE PROP. TREELINE
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OFFICIAL TREE PROTECTION INTERMITTENT .
TREESAVE AREA FENCING STREAM SHEET wol
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Senior EngIneer:
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Drciwn By:
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ISSUE
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( �Ik % -1 \ "
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EX. TREELINE PROP. TREELINE
1--:__ DATE DMWN FILE NAME
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.. I -.: ". _ �... ___O_�� -mm "ft - I "M SHEET SIZE: D -SIZE (248I
OFFICIAL TREE PROTECTION INTERMITTENT .
TREESAVE AREA FENCING STREAM SHEET wol
HATCH KEY OF

ice,
HANDWHEEL ACTUATOR FOR
BOTTOM DRAIN VALVE, PROV b ° NOTE: ALL FEROUS COMPONENTS ARE TO BE EL ACTUATOR FOR OPERATING )RAIN VALVE, PROVIDE BRACKET TO NORTH
STABILIZE RISING STEM. 8"~ X 1 2" STEEL PLATE CUT IN HALF FULLY BITUMINOUS COATED INSIDE AND RISING STEM. 4.90' INSIDE 4 X 2.5" X 1/4" STEEL
/ OUTSIDE. 4.90' IP • W/ 4" x 6" HEAVY DUTY HINGE W/ BAND F BAND FOR MOUNTING TRASH RACK TO
' SIX BOLTS. WELD REBAR TO PLATE. CONCRE • NOTE: SEE DETNL AT UPPER RIGHT CORNER 30 ° OF SHEET FOR DRAIN AND ACCESS STEP 48"0 CON r CONCRETE MANHOLE.
a 1/2" REBAR TRASH RACK. NO CLEAR ORIENTATIONS RELATIVE TO EACH OTHER, EXTENDED 48"0 CONCRETE PRECAST MANHOLE WITH 8" FLANGED DIP EMERGENCY EXTENDED BASE. PROVIDE DOMED TRASH DRNN PIPE AND 8"0 FLANGED 4" DIP DRAWDOWN PIPE WITH 2"0
_ ~ OPENINGS GREATER THAN 8". RA K N C ( 0 RACK (NO OPENINGS GREATER THAN 8") PLUG VALVE W/ RISER ROD & RESTRICTER PLATE FACING EAST.
PROVIDE 1" GAP IN R BAR F 24" NOTCHED WEIR EL. 258.68'. TOP / SF E OR FACING EAST. WELD 1 2 REBAR TOP REBAR RING WELDED HINGE OPERATION OF TRASH RACK. / " 2 TOP /SPILLWAY EL. 259.10'. HAND WHEEL. FACING NORTH. SEE DETAIL TO LEFT. SEE DETAIL TO LEFT.
TO BLIND FLANGE. AS SHOWN TO PROVIDE OPENINGS ~ GROUT WI PRECAST HOLE TO RECENE 30" RCP. GROUT WITH HIGH STRENGTH PORTLAND
2.5" X 1 4° STEEL BAND FOR WELDING NO GREATER THAN 8" CLEAR. z - CEMENT ~ / w CEMENT GROUT.
~ ~ a. REBAR TO ANO FASTENING TO 48" MANHOLE. ° J ATTACH TO 48" MH W/ 1/4" GALVANIZED c~ 9
• ~ I • , ~ SCREWS & LEAD ANCHORS 8" O.C. ? 47 L.F. 30" CLASS 0. : '~7 L.F. 30" CLASS III RCP ®1.00 W/ MODIFlED _
NOTE: 4" DIP DRAWDOWN PIPE WITH 2"0 ~ BELL & SPIGOT MEI ~ ~ RESTRICTER PLATE FACING EAST. g ~ 4" DIP OPENING. INV. AT M.H.- 7.00' C76. PIPES SHALL TELL & SPIGOT MEETING REQUIREMENTS OF AsrM Wrenn E n i n e e r i n 9 g :76. PIPES SHALL BE CONFINED 0-RING RUBBER
HIDDEN 1. SEE DETAIL AT UPPER RIGHT 25 0 GASKEi JOINTS MEE ( ) CORNER OF SHEET FOR DRAIN AND INV. AT INLET- 256.00' ~ ASTM C-361. P tASKEi JOINTS MEETING ASTM C-443 AND JOINTS Civil Engineering ASTM C-361. PIPE JOINTS SHALL BE TYPE R-2. 65.5fl
PROVIDE TRASH RACK. SEE DETAIL ~ Land Planning
DETAIL- TOP VIEW ACCESS STEPS ORIENTATIONS roP viEw TO LEFT. ( ) 4" DIP DRAWDOWN PIPE RELATIVE TO EACH OTHER. 24" NOTCHED WEIR EL. 258.67'. Site Desi n 9
8" FLANGED DIP EMERGENCY ' . d ~ - PR01 INLET W TRASH RACK 2. ALL FEROUS COMPONENTS ARE DRAIN PIPE AND FLANGED ' • STEP 8'® X 1/2" STEEL PLATE PROVIDE POLYPROPYLENE COATED MANHOLE FACING EAST. SEE DETAIL TO LEFT. STEPS ®12" VERTICAL SEPARATION.
TO BE FULLY BITUMINOUS COATED g" FOR WELDING REBAR TO. PLUG VALVE W/ RISER ROD W/ ; . ~ ~ ° ~ FILL FILL MANHOLE W/ CLASS 3 CONCRETE MANHOLE STEPS CENTERED ON WEIR
INSIDE AN OUTSIDE. ~ ~ 1 HAND WHEEL. FACING NORTH. ; ; r:.. : '':'.a;o:%:.. TO E /2 REBAR TRASH RACK. NO CLEAR OPENINGS GREATER THAN 8". SEE INV.- 257.00'. USE LEAN o * -:.'i .:.P;~.:~ y.~: USE TO ELEV. 254.00' FOR ANTI-FLOTATION. 30" RCP OUTLET PIPE. SPILLWAY. SEE DETAIL TO LEFT. G CO. <,o•"" USE LEAN PORTLAND GROUT INSTEAD WRENN ENGINEERIN
30• TOP VIEW FOR REBAR LAYOUT PORTLAND GROUT TO 4" BELOW OF OF CONCRETE WITHIN 4" OF DRNN 1910 SEDWICK RD.
& AROUND VALVE FOR FUTURE .83 VALV 2.5" X 1/4" STEEL BAND FOR WELDING MAINTENANCE INSTEAD OF VALVE FOR MAINTENANCE. DETAIL- TOP VIEW OF RISER SUITE 200-C
4" DIP FL-PE WALL COLLAR REBAR TO AND FASTENING TO 48" MANHOLE. POURING CONRETE FLUSH TO MON ANCHORED W/ HIGH STRENGTH ATTACH TO 48" MH W/ 1/4" GALVANIZED VALVE. BOT MONOLfTHIC EXTENDED MANHOLE BASE. SHOWING DRAIN ORIENTATIONS DURHAM, NC 27713 BOTTOM ELEV. 251.60'. [phone]
PORTLAND GROUT. . SCREWS & LEAD ANCHORS 8" O.C. BLOWUP SCALE 1" = 3' BLOWUP SCALE 1" = 3' [phone] fax
8.5" O.C. MAX. SIDE VIEW F 0 WEIR TRASH RACK. NOTES. 4" DIP FLANGED N NOTE THAT THE RACK REBAR IS WWW.WRENNENG.COM
LONG RADIUS ELBOW. 4" DIP DRAWDOWN PIPE WITH 2"~ ~ 2.00 EXTENDED AND BENT TO PROTECT 1. DURING CONSTRUCTION THE RISER WILL BE 3. RESTRICTER PLATE FACING N.E. o WEIR FROM DEBRIS BLOCKAGE. SURROUNDED WITH WASHED STONE TO SERVE AS BEL BE 3. THE 30" BARREL IS CLASS III RCP, MODIFIED 5. OVEREXCAVATE 12" DEEP ALL AREAS
PROVIDE WALL ANCHOR COLLAR. A SEDIMENT FILTER BEFORE THE WATER ENTERS OF IVE AS BELL AND SPIGOT, MEETING THE REQUIREMENTS ASSOCIATED WITH WETLAND PLANTING PLAN
INV. AT M.H.- 257.00' THE RISER AND OUT PIP . INV. AT INLET- 256.00' 1/2" REBAR WEIR TRASH RACK. LET E O-I JTERS OF ASTM C76. PIPE JOINTS SHALL BE CONFINED AND REPLACE WITH ORGANIC TOPSOIL 0-RING RUBBER GASKET JOINTS MEETING ASTM STOCKPILED FROM SITE. SEE SHEET WQ1. RE4uIRED VOLUMES FOR EXTENDED DETENTION WETLAND F V,f w
SEE SIDEVIEW ABOVE, C-~ C-443 AND JOINTS OF ASTM C-361. PIPE OR RE E ONLY.
2. THE 4"0 DRAWDOWN PIPE, THE 24" WEIR , JOII BASKET REBAR TRASH RACK. „ R , JOINTS SHALL BE TYPE R-2. 6. OVEREXCAVATE THE MICRO POOL AND ELEV. FOREBAY MAIN POND ACCUMVOLUME NOT FOR CONSTRUCTION. (S.F.) (S.F.) (C.F.)
sEE oETAIL To LEFT. AND THE 48 ~ RISER ARE TO HAVE A PERMANENT . TRASH RACK MOUNTED TO EACH OPENING TO 4• MANENT FORBAY TO ELEVATION 253.00' (1' BELOW 254.00 361 820 0 TO 4. THE EXTENDED DETENTION WETLAND WILL BE DESIGN GRADE) TO ALLOW FOR SEDIMENTATION 255.00 556 1
. e .00' USE ' S" WALL PREVENT DEBRIS FROM ENTERING. THE OPEN 'EN USED AS A TEMPORARY SEDIMENT CONTROL VOLUME. Oso 1414
~ THICKNESS AREA OF EACH ORIFICE'S TRASH RACK MUST BAS BASIN DURING CONSTRUCTION AND MUST BE 255.so 651 11so n7s ~T 256.00 752 1325 3257
EXCEED THE ORIFICE AREA TO PREVENT FLOW TRASHRACK BLOWUP SCALE 1" = 2' PRit I RESTRICTION. SEE DETAILS. OW CLEANED OUT, VEGETATED, AND OPERATIONAL 256.25 8os 1606 3818 PRIOR TO USE AS A WET DETENTION BASIN AND 256.50 856 4611 4841
9.5" BEF __.J BEFORE ANY PERMANENT BUILDINGS ARE 256.75 916 5430 6356 s^mTM+~~~,
O.C. 24" NOTCHED WEIR EL. 258.68' oCC ORIFICE TRASH RACK. ~ ; OCCUPIED. 257.D0 971 8628 8349 ~ m,
WELD 1/2" REBAR TO ,q ELEV. FOREBAY & ACCUM VOLUME ~~~>~~a~~'~~
BLIND FLANGE AS SHOWN. NO MAIN POND (C.F.) ~ ~~~'"CB
OPENINGS GREATER DETAIL- (SIDEVIEW) 4" DIP DRAWDOWN PIPE WITH 2"~ THAN 2". 4" DIP DRAWDOWN PIPE RESTRICTER PLATE. 48"~ CONCRETE PREC JCRETE PRECAST MANHOLE WITH EXTENDED 257.50 10298 13323 ~ I~~
INV. AT M.H.- 257.00' BASE. PROVIDE DOME[ h 258.00 11036 18657 'OVIDE DOMED TRASH RACK NO OPENINGS ~ 'R.
INV. AT INLET- 256.00' GREATER THAN 8") 258.50 11764 24357 THAN 8") 258.sa no4a 26466 " °
BLIND FLANGE W 2"0 EX' G ' / ROUNp SPILLWAY EL. 259.10 c¢ EL, 259.10' 259.00 12478 30423 , ~Z~~
HOLE ORIl1ED IN BOTTOM - PROF TO CONTROL INFLOW. l~ V ARC 260.00 14004 43664 C 16 WIDE EARTHEN BROADCRESTED W EIR 7rr
ESQ 10.00' ~ ~li'tit311s~~,e EMERGENCY SPILLWAY ELEV. 260.0.
~ 1/2" REBAR TRASH RACK CAGE. MAX. 2" . ' ~Iti~ DAM EL. 261.0
• ' ' oPENINCS. 1OOYR-ELEV. 260.25 _ 10YR ELEV. 259.84' _ _ I~:° I LINE 20 L.F. OF DITCH
' • • 2YR ELEV. 259.56' - - 1 - - 30 RCP FES W/ RIP-RAP. BRING
4" DIP OPENING. ;d'' - - {HIDDEN) NORMAL POOL . - _ . - - - -I ~ - - ~ I- - L;1, - - - - I ~ 3'1 ELEV. 2 RIP-RAP UP TO ELEV. _ - _ 53.53 .
ELEVATION 257.00' - - - DEfAIL- (BOTTOM VIEW} 4 - , _ 255.53'. SEE PLAN.
7 L.F. 30" RCP ~ 1.0( 4 DIP DRAWDOWN PIPE INLET W/ 2 - RCP ~ 1.00% W E - J _
RESTRICTER PLATE & TRASH RACK. POND INVERT EL. 254.0' TIGHT 0-RING GASKETTEI JG GASKETTED CT N - - Q
P N F - SEDIMENT STORAGE SEE CANTING PLA OR WETLAND _ OVER EXCAVATE MICROPOOL & TORBAY TO EL. 253.0'
TRASHRACK BLOWUP SCALE 1" = 1' PLANTING SCHEDULE FOR BASIN. - - W
~
- - 30"RP T C OU LET 8 BOT. GRAIN & VALVE EL. 254.00. - > P OUTLET o.ao'
- - INVERT EL. 254.0 EL. 254.0' _Z
EXTENDED BASE OF CORE OF DAM TO BE SELECT LOW PERMEABILITY CLAY ~ MATERIAL AND COMPACTED TO 98% DRY DENSITY. WHERE Q
~ SECTION )HROUGfI EXPENDED DETfNTI(AV WETL,4ND PRECAST MANHOLE. CONC. NOTE: SEE DETAIL AT UPPER RIGHT RIGHT CORE IS IN CUT, VIRGIN MATERIAL MAY BE LEFT IN PLACE IF ~
yyp~ SCALE 1 = 6 BASE EL. 251.60' FOR DRAIN ORIENTATIONS RELATIVE :LATIVE DETERMINED TO HAVE ADEQUATE CONSOLIDATION &
TO EACH OTHER. PERMEABILITY BY FIELD ENGINEER. ~
Z
m I y Q J
~ ~ W
~ _ Q ~ MIN. LL Q
~ m ~ z i~ Z W
Q
~ ~ '~J~.-. 9 MIN. . 0
I I D
f FILTER `~a: C , LO FABRIC - -_`.'r:~;:(';;-~ ~
I ~P R 30 M:~~'
I
ELEVATION
I Z 6" THICK LAYER OF FLOW
3/4" STONE
1 FILTER .~~1# '<<,.;~„-~ .<a;., s-~ 24" MAX I
RIP-RAP VELOCITY DISSIPATER FABRIC Sul. - ~~.:~~.;r.?'1 J W r+i; ~ °~I'=~ ~ .r~.; AT CENTER I
CHANNEL LINING. LINE 20 / fi., ;.~i~~}I?.'; i~rl i'1 ;'i is ~~.i :i I~r )-t'~ ~ `%I~ V:~~.o-l.i
/ EXTEND PERMANENT TURF L.F. OF CHANNEL AND UP /
SIDES OF FES. / REINFORCEMENT MATTINGTO NORMAL CLASS A
/ POOL ELEVATION OF POND (257.00'). 1 / ~ EROSION CONTROL STONE ROCK CNECK DAM
/ W01 SECTION
_ ~
- ~
~ - Mo~E FENCE aR RdovE Z
~ ~ REM E 7~REEOi YOIE SEQUENCE: 7MAN ~ ~ A ~'S t. OBTAIN APPROPRIATE PERMITS O
_ \ ~ ~ AIL 911E5 OPEN. RY flF/. 281.OD CRNICAL RCCT AREA 2 HOLD A PRECONSIRUC110N CONFERENCE WI1H THE LANDSCAPE PROTEC110N SUPERMSOR, B UNFROIECIFD. 0 ARCHITECT OR LANDSCAPE ARCHITECT AND URBAN FORESTER.
• PRECAST OCllgklE OVJQt WITH NANCIFS tEasr CONCRETE OOJQt CTED c%xs7R1~TKx1 3. ERECT TREE PROlEC110N FENCNG wwgFS 4. CLEAR AND GRUB 1REES AND SHRUBS TO BE REMOVED
T Y Tro. 5. INSTALL SOIL AND EROSION CONTROL MEASURES ~ 6. RWGH GRADE SITE O RETAM 7. EXCAVATE FOR FOOTINGS, INSTALL UTILTRES AND CONSTRUCT BUILDMG W
. - „ g D2 POND EMERGENCY SPILLWAY 1 - PERMANENT TURF REINFORCEMENT 1,.- ,i ~I{ : - _G; T 8. FWLSH FlNAL GRADING AND PAMNG ~ T»• 9. REMOVE TREE PROTECTION FENCING
II;::; ::a I I::. ~ I :3 WQ~ SCALE: 1" - 10' MATTING "TRM". SHEAR RESISTANCE= 8.0 ~ j Ew. y/~• ~ CAIn R00 ZONE 10. INSTALL LANDSCAPRIC T
LB S.F. LINE EMERGENCY SPILLWAY UP x,• o TREE v ~ ~ Z Q " 0
TO ELEV. 260.50'. LINE SPILLWAY INSIDE ss~ e' S-4 a, CA ZONE Q y
AND OUTSIDE OF POND (HATCHED AREA). ~ Y x Ip' RWNO NOTES: ~ 1. ROOT PRUNE 7REES TO REMAN WHERE CONSTRUCTION AC7INTIES 1MLL SEVER ROOTS O
8. 8. HAVE "TRM FIELD REPRESENTATIVE 2 PRUNMGEl00L EXPOSED BY CONSTRUCTION SHALL BE SEVERED CLEANLY WITH A Ly Z
PRESENT DURING INSTALLATION. ~ ~ 3. DO NOT DISPOSE OF ANY CHEMN;ALS OR REMOVE SOIL OUT90E THE LIMNS OF WORK. 4. WHEN MSTAWNC NEW LANDSCAPE PLAN15, DO NOT DRIVE EQUPMENT UPON OR H~GIiT~ti ~ FFf~7 Sx BEF~APPROFp~11A1~EI.Y~4~WAl ~ 0' DISTURB 1HE SqL WITHIN THE CRNICAL R00T ZONE OF EXISTING TREES. SenlOr Engineer.
~ S. AT THE START OF GRADING INVOLVING 1HE LOWERMG OF EXISTING GRADE AROUND ~~fD~ p_p tldt~E A TREE OR STRIPPING OF TOPSOR, A CLEAN, SHARP, VERTICAL CUT SHALL BE s' STEEL. aoG 10 . SPACING NA7AIAIN K. fIf{GNN
~ ~ ~ y,~. MADE AT 1HE EDGE OF 1HE TREE SAVE AREA AT THE SAME TIME AS OTHER ARp ARGUID HANDLE SHLLL BE CWNIER EROSION CONTROL MEASURES ARE INSTALLED. THE TREE PROTECTION FENCING
e~ ~ 36' so g~ Tij N . SUM( T' ND HYgE SITYL BE FREE m SHALL 8E MSTALLED CN THE SIDE OF 7HE CUT FARTHEST AWAY FROM THE TREE DrQ~ YOrE DCSTI TRUNK, AND SHALL REMAIN IN PLACE UNTIL ALL CONSTRUCTION IN 7HE VICINITY
Q~ ~o $B 1 PIPE yT~yE, y I,pq OF THE TREES IS COMPLETE. NO STORAGE OF MATERIALS, FlLL, OR EQUIPMENT
~ SPILLWAY SLOPED ®1.0% TOP OF DAM ~ ~ - ~ ~ 3' 3•'~ ~ 1 . • 1' EL. 261.0' ~ T ~ --L PROTECTEDE~ NG SHALL eE ALLOWED 1WTHIN 1HE BOUNDARY OF THE K. WRENN t• 6, THE R00T PROTECTION ZONE 15 AN MEA THAT COVERS I' RADIUS FROM THE RIESPASSING
1.0' DEPTH ~ C- ~ ~ GRASS LINED SPILLWAY EL 260.0 ~i y T NK F EA H SIGNS TO BE INSALIED ON TREE PROTECTION ' TRU OR C i CALIPER OF THE TRUNK. FiNpNG AT A MA7GMUN CF 75 O.C. I~~E ~ y 7 7. WHERE 80TH TREE PROTECTION FENCING AND SILT FENCING ARE REQUIRED, THE W71T1EN M BOTH sPAWSH AND EHGIISH. 1REE PROTECTION FENCING SMALL BE INSTALLED CLOSEST TO THE WODDUNE.
&1REE PROTECRON FENCE TO BE NARKED EVERY 75 TO 100 FEET APART WITH NO, DATE DESCRIPTION
DETAIL OF YARD INLET SIGNAGE IN BOTH SPANISH AND ENGLISH SA11NG "KEEP OUT' 1 'A'21/~ NCDWQSU~IITAI.
C 6 :TRA E~OtDAL'iW11R r~ ==-•-^•-v 7, ~ 2•. Y.6'
ti gyn. ~ , , - 4 ~ 4 X 4 YARD INLET YCB P ~ D4 1REE PROTECTION fENCING
WM1 PRECAST CONCRETE COVER W/HANDLES W~1
• PE]~AIANEM SPILLWAY LINING:
. , ~ ; ~ ~ = ~ • ~ ~ ~::7:~ LINE EMERGENCY SPILLWAY UP TO ELEV.
260.50' WITH TURF REINFORCEMENT DALE DRAWN FILE NAME
D2 MATTING RATED AT 8.0 LB/S.F. LINE POND EMERGENCY SPILLWAY SPILLWAY INSIDE AND OUTSIDE OF POND
PERSPECTIVE VIEW AND TO NORMAL POOL ELEVATION 257.0.
wQ~ SEE PLAN VIEW ABOVE. PROJECT A 03101.00
SHEEP SUE: MIN (24'x361
SHEET
OF W021

-
Q l~ii I i , -
z ~ , i F 1 1 1 'i -o...,~- ~ ~ j I r I? l4J ~ CASE # DO ~ / ~ \ ~ ~ 3-658
TO O j i~ r; A 1 1, cf~aPEL I I \ 1 HELL + 1 ; ' I / / ~ `Y ~ PIN: 0738-03-01-8050
o Its ro" _ 1 h ~ i ; ; ; ~ I ROOTZOt~dE PROTECTION REA- AREA1 1 I! 1 ? l i I' ~ ~ MEASURE IN FEET RADI FROM T THE R ~ / ,,\ti \ Parcel-ID: 541-02-002 OFFS ~ DRAINAGE / ~ ~ /
NC 54 ~ , , ~ ~ " q E HWY i ( ! ! ~ TRUNK EO L TO THE TR 1 (r Ij ! I ~ ( , ~ NK DIAM R IN \ AREA {OSDA-G `X ~ `
1 ? , I, oN INCHES & I NO LESS THAN 6' MINI UM j DRAINgGE Lr I , , , 1 1, 0) ~ j BOUND R` Y <I ORAINgGE BASIN \ _ / I` / ' A - 0.621 AC. ~
O r ; i ; 1 I; N ; RADIUS FRO THE TREE TR1rJNK. I } row li l;„ I 1 , o t \ DIVERTED HWY `%--`~=,-;•s ,y
~q( t.n ! f` r ~ I Z DOUG S& PAME~.A LOWS I I ~ ErOy ~ III ; . I ~ h A / I l ~ , `ti 0) ~ I
r r 1~G p. 1 PIN 73 -03-01-9325 \ due 4clli I o ~ T.M. \l ~ OFFSITE DRAINAGE ~J`~,h%`••• ~ ~ { ~ ~V
c.~ r ~ 1 I I I R~ . i Ir j , r Ilt, ~ z 1021792 I ~ ~f/~11~EA OSDA-E / ~ ,X. ';~``i~~!` I ~
s Z i o0 I NORTH Al I ! ! j l i - ~ LI 1T~ F DISTURBANCE ~ LFNDO f- ~ r I, , I I j Ij I ZONE (NC & RD) / 1 ISTI~RBANCE v DA = 0.095 AC. ~ ~ ` I ~ ~ ~
Tpp,,~~ PROTEdTION WN ~ r6 I,~~ I i A. j 1 1 +Y~ ~ \ li v I i,all:; `fl I USE- RESIDENTIAL 'f., r r ~ f•,l`•, )TEdTION \ ~ DIVERTED 1'0 54 ` I I
U ~ - ' I! I+ ~ i z-- - F/J-B TERSHED I F~N41 G II f , II: ~ I + v ~ CULV #TS. X ' , / .j ~ I 2-54" R P ~ `•.1`•,, 1,-- C CULVERTS INLET. Wrenn Erl meerln
~ w J 1 , U ~ „ CAPE F AR RIVER ~ASIN - ~ Q MAGNETIC (P.B. 44 , P:17} 1978 I ~ I ; ! \ ~ CHAN L G (EX. I GRASS N-SH E) vi ~ r+I ~ i , . •../•;I. ` I I MITERED HEADWALL ELEV. 260.00
ti ( II II I = ~ ! , I I + COP ARaES,.~OEppTt}...ViaRIES. S ~ f''•.,,~,~,`~ ' I I 8 X 20 RIP-RAP MAT Civil Engmeermg
~ • 23" LINE W Land Planning I d50=9 d= FABRIC. t' / ~ ~sc~.' I l I Site Design
~ ~I iii + o~ : F \ ) j ! I ~ . `~,wg1,~.~p LOW .i„-,,,,; Site Q I I , ; , .
I m ~ FLOW I l j I , ~ - ~ .,x.,,„41 E 6 ~ 9R,, . / / 1
I I F T ( 1: i L~ I f°`.•~1: I E Ex. F.-.,LOW LMTS 0 DIS URBANCE & i( ~ a L I j I I W CHANNEL ~ / ` \ ` b ~ LL / I ~ I
, , 1 n: ~ II TREE PROTECTION FENCING. / ! I, ~ ~B.. taY r~ 4 i, I i j j + ~ r BLpGS. 1.51' ~ (GRASS v ' _ ~ ` • ~ ~ ~ / / ; / I WRENN ENGINEERING CO. I( ~ SLOPE, S RAPE) 'ti ~ ~ $ ~ •S.~ 3i1, 0- \ ~ ,q~~ `ti / v m / I 1910 SEOIMCK RD.
i I ...r I . FLOW ~ 8 . , °•8 ~9' / / ~ / / / LIMITS OF DISTURBANCE SUITE Zoo-C
~ SILT FENCE TO HERE. ` I I [ ! . I PROTECT CULVERT FES. III ? r ` ' I ~ + , FLOWi FR / DURHAM NC 27713 ` ~ ~ VEGETA110N / / / & TREE PROTECTION
0 I Ir F. i ! jji li , Y TO REMAIN / / FENCING [phone] / / VE ATION / ~ (919} 806-5083 fax
i ( I i EX. HOUSE :j OFFSITE DRAINAGE i ? j i r',I I . \ ~r~ / ~ f ~ / T REMAIPI~ HMM!WRENN
AREA OSDA-F I i Ij ! ( ~ I fl(I R / ' ~ ~ I / SILT FE eE TO HERE / 2 .5 it J 1 ~ OFFSITE DRAINAGE
r DA = 0.013 AC. ! ~ ! ± r I a. \ ~ ~ TIE ~0 HEADWALI,r ~V, / I / tI I , ~ ~ ~ \ ?ssg~ I 1 I AREA (OSDA-E+D)
Q GOES TO POND. , i _ , BLOC. \ \ U + ( I I I ( ' ADDITION , 1 \ ~ \ ~ - ~ l i lI \ l l l ~ c~ - ~ l / I DA - 0.2096 AC.
o tl_ 11 I i I i v v V><cin>a Ma 1-1000. ~ 11 ~ ! ~ ,t:i ~ HANNEL HANNEL ~ _ Qfr ~ \ ~ I ,
y p 1 ~ I I ll r. - t I ( I I : PLAM ~a1i0POFF . p -gr ~ ~ ~ M I / I ~ / -6 \ BER ( / ~
I I I I I j ~ ORAVE4 ~~1S1EE ARKiNG ~ Seeding Schedule for Slopes 3:1 or Less , i ~ p _ eoce ii~'cw,~ : / ~ ~ _ J~ \ I / F PIPING OF INTERMITTENT STREAM
~ ° ~ - LT FENCE TO HERE. I I I ~ ~3 ~ ~ AND REMOVAL OF STREAM BUFFER. i ~ \ I I `y TI TO P~EADW L f l ` I I ~ I „
Fall/Winter/Spring Temporary Cover August 15 -May 1 I 1 I I : + + , I+~ I 5' X 50' GRAVEL f > ~ ~ ~ I j I ~ ~ ~ / I I / ~ \ I I 438 L.F. OF 2-54 CLASS III RCP
Lime 100 Ibs/1000 sf ~ 1 r CONSTRUCTION E'{~1RAN E + ` - - 1 I IJ CHANNEL ~ I ' 10 10 10 Fertilizer 25 Ibs/1000 sf I I I I I ~ , ; :d A _ f. l I ~ ~ ~ \ I CULV RT T i , ~ _ / III / ~ _ ~ , _ I I E S A 0.913%. CULVERT
oat seed 2 Ibs/1000 sf SILT FENCE TO HERE. I j i w DEPTH- 6 \ , - - ~ f ~ I l I BACKFILL TO BE STRUCTURAL i / I I ~ .y l
Rye Grain Seed i Ibs/1000 sf TIE TO SLOPE. / ~ ~ j ! m OCK CHECKDAM (E~tyANENT) 1 Straw Mulch * 100 Ibs/1000 sf ~ I I 1 1 I " „ \ ~ / I t I / / „ " CONTROLLED FILL TO 15 EITHER 'asp, ~i I~{ / I C NEL D RAP.) \f I I ~ CAd~ ~ w~~..
+ I I f i I l ~ C NEL F (TRAP. \ LIMITS OF DI TUR A i I ~ ' ' ' I` 1.Gx SLOPE S.S.- 1 \ - - - - - / _ SIDE OF CULVERT CENTERLINE. ~ - I 1.0 S E, .S. 40:1,
Summer Temporary Cover Moy 1 August 15 i I 1 , Ij r- ~ W- 4~; DEPTH VARIE ` ~ / w s, PTH} 3. I STREAM BUFFER IS REMOVED, ® ®.~s~~ u.
Lime 100 Ibs/1000 sf / I I I ' ~ m . ' ~ ~ I o I ~ ~~,n~ ' "rte Y
10-10-10 Fertilizer 15 Ibs/1000 sf I I 1 : 1 I I !I I , \ \ - / I (I (I j l f j CHANNEL\ \ CHANNEL Browntop Millet Seed 1 Ibs/1000 sf - ~ ! ( "
r * I I I i I( j I ~ DEPTH- 1\ DEPTH- 12 St aw Mulch 100 Ibs/1000 sf / I 12 _ - - ~ 1 101
I I j j 1 II ~ d a l \ / ~ i I Ii ~ ' _ ~ - ROCK ~ \ i i / I i / ~ 14 r~' I ~ ~ / • 31 SLOP ~ I
Spring/Fall Permanent Cover March 1 -April 30 I I ~ I fl _ 3 ~ \ " ~ / August 16 -October 31 ~ j I CHECKDAM 7 L,F,- RCP W/ 0-RING BERM I I 1 ~ ~ I I ,h ,S ~RTHF~BERM :ti I I \ f 1~
l ' Fj - ° PERMANENT TERTIGHT ASKETS ~ 1.0°6 UP OP WI TH= ' •r I a I ~ ) ~ ~ / 0 3 ~ )P WIDTH= 3' ~ \ / / I ' I I _ OPE \ 1 I I ° / 1 SL ~ ~a x~ I
III I f I - r- 25 . ,DOW 253.53. SEE Lime 100 Ibs/1000 sf I ( ~ = z / r II j 1= w \ DET SHEET NOTE BELOW. „ 10-10-10 Fertilizer 25 Ibs/1000 sf I I (I I ~ \ r / / C NEL "8 1 1 I UM I / / i~ MINI
Ira roved Turf T e Fescue Seed I I I I I - Z \ 9 p yp 7 Ibs/1000 sf ~ ~ ~ I a;11 I ! ) I- ~ POND PRI SPILLWAY ~ SLO S.S.- 3/I, W- VEL "B" TRl,+P. 1.0~% f I 1 ~ I I ~ ) / I / I I x S.S.- 3/I, W- 4~ \ 1\ I
Straw Mulch * 100 Ibs/1000 sf ~ ~ j r 2 1 12 1~a - rr `~1 4'0 P~t .H. DEPTH IES! I I w r / / ALLY AREAS rEXCE T IFOR SI.D. \ < ) ~ I I N I IES! ~ C
1 1 1 1 1 ; j I= RIM- 259.10 , -254. ~ Seed temporary cover to stabilize temporar sedimentation control ! II - \ y SILT FENCE TO HERE. ! I ! I I ! II = SEE DETAIL SH ~pW & NETTING r~~' / AMTS. BE MS FI L SLOPS \ \ • J U 1 I ~ o
measures and other disturbed areas prior to final grading or if i ! I I I I _ -~T~ I II I II I- \ CHANNEL Ir N IN l ~ fob / / AND CHAN ELS T \ i I I o I ac Err G ~ / N ) iBE \ S I °0 N WNEL F / / I DRAINAG BASIN I / REFORESTEp WITH GIZICULTU ~ \f I o
planting season is not suitable for installotion of permanent cover. TIE TO CULVERT FES (OUT2) I 1 I i I - \ \ Seed permanent cover when final grading has been accomplished. j ( II I I I ~ DEPTH- 15 'TH- 15" I / / I I BOUNDA o0 p l / I / PINES AND STABILI ED\WITH \ ~ I ~
CHANNEL A (GRASS V SHAPE) W/ CURLED I I_ ~ 3 P (0 1) ( PERMANE GRASS GRO D `i I I TURF o l ti / \ \ \ \ I REINFORCEMENT r~ d,
WOOD MATTING. 1.0% OP . - ! ( ~ I 1 II I I. ~ : - ~ 1 ~ ~ 1 ~ ~ / / - 54.o COVER TOP EN EROSI ~ ALL \ ;III MATTING RATED AT B I o ~ \ \ " I ( \ 1 \ I LB/S.F. SHEAR. ~ I
SL E S.S.- 2.1, D- ~ I I , I _ v 1 IIII I _ ~ ~ ~ I ~ 24 . LINE FIRST 10 OF CHANNEL W/ d50 = k z ~y' I w / 31• L~ 3sI \AREAS TO BE 1;QBI IZED WITH. \ ~ f I I roza•DEPrH o~ ~ \ \ ~1 0~ o~,o
9 RIP-RAP, D-23 , FABRIC. ; I I I I~ >I I _ RCP 12.97 S GROUND C R. l . a I i ~ N I\ / I I I ~ REDIS?RIBUTE ALL 0 TE \ \ ~It ~ o ~o
I I ~ _ _ ANE~iT ~ , . Tt~3N 1,. A TRANSITION POINT IN CHANNEL FROM RIP-RAP ! I + I I , ~ ~ ~ STRAW N NG \ \ I I c~ ~ 1 I TOPSOIL. ~ ! / I P - W . v
~ ! _ A~, I -.fl TO EXCELSIOR MARRING. ~ I I j - - few, . \ ~ { / I Zy _...NATURAL ~ ' L YCB-1 W/ INLET PROTECThON.~ \ \ I I ? a 14' X YARD IN ~ \ I ti DE Q
\ ~ I ~ ll I o~.a /RIM- s1.1'', TO - 261.93', I I
LINE EMERGENCY SPILLWAY WITH TURF I I >,~~',;,>,;~h,>~ - b.~,;. REINFORCEMENT MATTING RATED AT 8 LB S.F. ' r-'~~ \ I I Ill 1 1 Z ~ INV.- 157.,b . 4 IDES OPEN. \ LIMITS\OF DISTU BANE & ~ ! I X~ECTION CHANNEL "A" (GRASS V-SWALE
~ 1 I ry SHEAR. SLOPE - 12%. ~ ( II I - ~EN N~~- ~ ' - ~ ~ I , : U ~ ~tTNE ~ I ll ) \TOP ILT FENCE- 262.1' \ TREE P OTECTIO FE CING ~j~j ~ I 4 \
I I; I ,I ; SEE DETAIL SHEET. I I I yF. I i 2~, I8~ F I ~ SED~MENT BASIN A \ \ srRAwa NErnNG . ~
I :ux SILT FENCE & TREE PROTECTION FENCING AT w I ~ III d I r` / •Q~. m J SEE bErAIL SHEET. \ \ I / I~ » ~ ro s' DEPn~I WHERE " W I ~ \ / ~ SHOWN oN PLANS. D I cIrANNEL •c• ~ ~ ! X / I ll
SITE AND EROSION CONTROL NOTES: LIMITS OF DISTURBANCE dC FOLLOWS STREAM WEADW LL I I II - ~ ~.W ,';`s)~ ~EGETA'T10N,. I 1. SLOPE, - 1, / / ~ 3.D' I~ ox ~ ~ / I J
~,66"\R / I ( I I , I I I p,' = A~ 4 '~ti \ , T A(h1. BUFFER. TIE SILT FENCE TO CULVERT FES. I I I ~ ~ ~ ; a. Total disturbed area: 5.98 acres. ~ I I = ~ ,1C . s ,,~'~J l i l l l l I I~ - , :mTRE~$A~IE,. I ~ I / /I 1S" \ NATURA 3• 3.1 I W- ,DEPTH 18". RC~ I # T SILT FENCE TO HERE. ~ ~ ~.1 I I GRADE
LOW I I Z EN ~ : e I ll I I I I I a.D' ~ ~ ~
b. All tree protection fencing on this project is required to be installed and inspected - ~ `~`ti TOP wlDn~ ~ / : i ! E'- Q NDA~tY I / ' l ( ) BOU ~ I l J I Ill / XsECTION CHANNEL "B" s "C" GRASS TRAPEZOID
before the grading permit is issued. All tree protection fencing shall be maintained ~ ~ I . _ . until all site work is completed and the final inspection is scheduled. The fencing shall ~ ~ I ~ ~ ~ \ . l ~ W FLOW ~ ; Ill I ( / (NOTE: DEPTH VARIES. SEE PLAN vlEV,~
be removed prior to the final site inspection for the certificate of occupancy (CO). ~ I I ~ ~ • ~ . , ~ ~ • • ~ .urrGEr.TI ~ . ) sTw?warErnNGTO J
- , c. The tree rotecfion fence marks the limits of disturbance exce t where the limits of ~ ! ' ~r-` ~~~;~s'..~,"~ry•:, 1 I I 3' DEPTH WHERE r a O
P P I I , ` disturbance line is illustrated withouttree protection fencing. ~ I ~ -i~ ~ • c - ~ "„'(r°°° _ . y;~ j I I I I ~ I SHIDWN ON PLANS. ° o _ _
I i0 REMAIN . { I I I . I 'ro ~ 10:1
I I I II ~ ~ 1 S d. Overlays: Jordan Lake Watershed (FIJ-B) I `~y I.;, ~ •I{. - , lI ~ ~ _ ~ I I ._NATURAL
I f I - - ~ EASEMENT • \ , e. Establishment of e e ro c ill r wired within 15 r ' da s rman nt and over w bee wo wn ~ I , P 9 q 9 Y II ~ VT ' ~ ~ ~ ~ i;/ / ~,J l I 6.0' GRADE
. 102 or 30 calender days (whichever is less) of last grading effort 1 I, I I + ~y..:. ~ a'~-~'-~~~ ~ ~ ' p ~s9 ~ r ' ~ i 1 ~ - 1 ~ I I i _ - '~`1~'F~"v'r~ I X-SECTION PERMA T ~ v ~ _ ~ _ _ ~ S I ~ ~I NEN CHANNEL "D" (TRAPEZOID)
I I ~ I BENCHMARK I I I) I f. Cut or fill slopes greater than 3:1 require apshalt emulsion tacking or hydroseeding. I I ' I / , ~ ~ ~ ~ I I V z p ~ T vim.,.- ~ I `I GRASS LINED Z
_ ~ SSMH RIM/ A I ~ ~ ~ _ •SILfi FENCE TO HERE. , , ~ ~ I 1 _ SILT FENCE TO HERE '0 I o ~ ~ ~ LIMITS OFD OISTURBANCE~c I 1 i .NATU T
g. Apre-construction conference is required before any land disturbance takes place. ,,1, ~ €L' ~~2• ~ 7 TIE TO HEADWALL. TIE TO BASIN BERM. n m I I l ~ - ~ _ 2.0' 2 \ i TREE PROTECTION FEN ING J I , GRA ~ U)
Call the County S&E Officer (919-560-0735) and Project Engineer (919-806-5082) at ~ ~ I I _ - ~ ' \ least 48 hours in advance of any land disturbance. Ensure that all interestedparties / I , ' \ ~ / \ ¢ I I ~ 1= ,2-54-12ePs~ HEA3ifYALL, INV. ELEV. 256.00' / 3~ -3~~. Q
\ i01 'PERMANENT STO DRAINAGE l have adequate notice ofpre-construction meeting. Referto construction sequence. ~ I 1 ~ r' \ \ ~ / t ~ I: , ~ 1 ~ I 8 X 20 RIP-RAP VELOCITY DISSIPATOR / l I w ~
~ _ I 1 ~ ~ ESMT. GRAIQTEI7 TO NCDOT FOR ~ I I I ~ . / RESEARCH LAND JOINT VENTURE d50-9 , d- 23 , LINE W/FABRIC. l ~ I 1 X•SECTION CHANNEL "E" (GRASS V-SWALE Q to W / / I I, PA )
i ~ . ~ NEW CULVERT INSTALLATION. / I 3 ~;1 \ PIN 738-03-00-8432' ~ ~ I l I I ll ~ RI4tIQ . STREAM BUFFER TO BE REMOVED ~ / ~ l l I; ~
I I~ ~ / I I T.M. # 541-02-001 I,I ; _ TO THE N OF PIPING. ~ / I I I I~ \ N ~ E D I I a
EROSION CONTROL CONSTRUCTIONSEQOENCE ~ \ ~ DB 1762!535 B 1021169 \ _ ~ ' / I I I I ~ ` I I \ GRASS LINED ~ w / ~ 1 / I \
\ ( 1 I ~ 1 ZONE (NC & RD PART ONE- Before Pre-Construction Conference 3.5 Before beginning any mass clearing a grading, inspect all the measures to ensure they are bufit and ! \ ~ / i I ~ I , 3~ 1 10.0' BERM -+I / ~ / i' S ~ ~ NATURAL 3'~
1.10btain a copy of the Approved Erosion Control Plan. operating correctly and then call for an onsite inspection of the sediment rwr>trol devices and site by the \ \ I USE- VACANT ~ f ` - / ` ` GRADE ~ I I l I
Project Engineer (919.806.5082) and the Durham County Sedimentation and Erosion Control Officer \ J FIJ$ WATERSHED 1.2 Install all Oran a Barricade Tree-Protection Fencin and Hoff Pra' ct E weer 91906.5082) (919-560-0739). Ttre site should be for cleari and mass redin oncelhe site has been ins eel ~ ` ~ 9 9 b >e ( 9 g ~ \ / CAPE FEAR RIVER BASIN /
and Durham County Erosion and Sedimentation Control Officer (919-560-0739) when it is by the County SSE and the Project Ergirreer. ~ / / / ~ - - - XSECTION CHANNEL "F" (GRASS TRAPEZOID) i l I ~ _
completely installed for inspection. Have surveyor stake out tree protection fencing to ensure that is located properly. 3.6 Begin clearing the site once the sediment basin and temporary sedinrertirap are ir~falled and
inspected and the twin 54" culvert is being laid. Begin grabbing and grading the site as the crvert laying
1.3 Do not disturb the she yet. progresses. Do rat get ahead of the cuvert laying with any grubbing, grading, aotlrer land disturbing activity and ensure that the stream, atn~tm banks, and area within 5' of the stream baNcs are not disturbed
PART TWO- Pre-Construction Conference at Site until the pipe laying progress demands tlrt ft be done.
2.1 Contact all parties interested in attending the Project Pre-Construction Conference to discuss the 50' project and erosion control plan in order to schedule a date that all can attend. These include, but 3.7 Ensure that the erosion control measraes are propedy stabilized and mamtained so that sediment - 50' 0 50' 100' 150'
are not limited to the following parties: Project owner or representative, Durham County Erosion does not contaminate runoff as it leaves the site. Install arty remaining sift ferae, temporary diversion Control Officer {919-560-0739), Project Engineer (919-806-5082), Grading Contractor, City of ditches, or other devices that are necessary to contain sediment onsite and out ofthe streams, adjacent
Durham Engineering, Utility owners, etc. properties, and public rghtofways. Scale 1" = 50' ~
2.2 Notify all interested parties of the agreed upon Project Pre-Construction Conference date and 3.8 As work proceeds, inspect all rrreasrres after each runoff producing rainfall everd to make sure they Oo
- time. Allow at least one week of notice before the scheduled conference date so that all can attend. are functioning as intended and maloe any necessary repaire or modifications. Ensure tlrat aN site
generated runoff is dlrected to one of the sedlment control rtreasures. The sie stand akreys be protected 2.3 Attend the Pre-Construction Conference to discuss the project and the erosion control plan. from sediment leaving the site. As the site is brought up to grade, retlistdbrletopsalond begin za
The party responsible for the installation and maintenance of the erosion control measures should stabilizing the cut & fill sopes with straw and grass seed in order to minimizethe erosion of airy sbpes due Oo
become thoroughly familiar with the approved plan before attending the pre~construcfion conference. to prolonged exposure. The permit will become active atthis time.
3.9 As the earthnaving operation progresses, inspect all sedimentation measures acrd r~rr out sedimerR d
2.41nstall a rural type mailbox marked "PLAN BOX" at the location near Hwy #55 on the right side of from the measures as necessary to ensure that they continue to perform as designed. Ensure that Hwy ROOTZONE PROTECTION AREA= AREA ~ Z
the gravel construction entrance (facing the project site) as shown on the plan. This will provide a 55 and other public roads are kept free of debris and sedimentand sweep as necessary. dry location for keeping a copy of the approved erosion control plan on site, as well as a place for the MEASURED IN FEET RADIUS FROM Senior Engineer; ' THE TREE TRUNK EQUAL TO THE EROSION CONTROL LEGEND
erosion control officer to leave copies of site reports for the Owner and Contractor. The flag on the 3.10 As the site is stabilized with grass and straw cover, irrstafi the remairrirg charnel iNngs as shown to Storm Df~tin PI B~ plan box should be raised by the Erosion Control Officer to inform the Owner and contractor that ensure no further erosion from concentreied tows. B t0 ~OWn B TRUNK DIAMETER IN INCHES & IS K. WRENN
there is a report or correspondence in the box. INVERT INVERT PI pj g pj ~ PI NO LESS THAN 6' MINIMUM RADIUS TREE PROTECTION FENCE Drawn
STRUCTURE RIM UPSTREAM DOWN. LENGTH DIA:IN. BY~ IN. SLOPE FROM THE TREE TRUNK.
PART FOUR- Site StatNl¢ation SLOPE PART THREE- Installation and Maintenance of Erosion Control Measures 4.1 Graded slopes and fills are to be planted or provided with protective coverarJfaent to reduce erosion I „ LIMITS OF DISTURBANCE K. WRENN r~-\
3.1 Before beginning any land disturbing activity, post the Land Disturbing Permit and a set of the within 30 working days after the oortplstion of any phase of grading. All arms uponwhich no further land t 2-54 HEADWALLS 280.59 260.00 256,00 438.0 2 X 5 A roved Plans in the construction site trailer or ofice. disturbin activi will be undertaken are to be !anted or with rotecgve coverwithin 15wodd 4 0.91 i4 0.91 ~ g SILT FENCE x ISSUE
PP 9 ty P fwd P n9 days or 30 calender days (wlicheveria less). OUT-1 TO YCB-1 261.10 258.00 254 ,:~.a I ~ ~ \ ` Dlv ~ Dlv ~ Dlv N0. DA1E DESCRIP110N DIVERSION
3,2 Begin preparing for the land disturbing activity by installing the gravel construction entrance and .00 31.0 36 12,90 12.90 ~ 1 11 3 CO~VSTRUCiION REVIEW
silt fence in the area of the driveway and below the master sediment basin. Install the pond primary 4.2 Maintain all erosion control devices until directed to renare them by the Drrlrm Counly Sedime~tiai spillway and channel "A" below the pond spillway. Stabilize the channel with rip-rap and curled and Erosion Control Officer. OUT-2 TO RISER 259.10 254,00 253.53 47.0 30 DITCH ~ ~ , ' 2 121504 CO~NSTRUC110N REVIEW
wood matting and tie the silt fence to the 30" rcp fes as shown. Install the silt fence below the 1.00 temporary sediment basin. 4.3 When construction is corrpleDe and all areas are stabnT¢ed, pll for onsite arspection by the Durham 1.00 GRAVEL CONSTRUCTION ROOTZONE CITY OF DURHM -
County Sedimentation and Erosion Cor>trd Officer at 5600738. PROTECTION EX. TREELINE PROP. TREELINE STREAM BUFFER ENTRANCE ;.1.~:;,,,.,~,,{
3.3 Once the pond spillway is completed, choose a period of dry weather and begin clearing the area around the sediment basin and end wall of the twin 54" rcp culverts. Immediately begin using the 4.4 If the site is approved, remove the 6empordry measixea oriel seed, pave, a ripfap the resulting
INI FT PRCITF(:TIf1N A
pond spillway and master sediment basin by diverting runoff to the basin as the pond dam and berm disturbed areas as required. Make the necessary modifications to the extended detention wetland pond " DATE DRAWN ALE NAME
is constructed. outlet once the site is stabilized so that the permanent fu ctlon of the pond can begin. Clean out the permanent extended detention wetland pond and grade the pond to design elevations and volumes and RIP-RAP
3.4 Install the twin 54" endwall and rip-rap mat and tie the silt fence to the endwall on bath sides. revegetate the constructed wetland as shown on the approved construction drawings approved by the city 111111
Once the twin 54" endwall is installed, begin laying the twin culverts. The stream crossing is of Durham and NCDENR. Install the inlet protection at YCB-1 once the site is seeded and strawed and provided at the first laid section of pipe. Begin clearing the area east of the culverts for the channels are lined leading to YCB-1. This will prevent large amounts of sediment from entering the PROJECT A 08101.00 CHECK DAM
permanent berm and temporary sediment trap. Install the temporary sediment trap and stabilize the extended detention wetland as the site draining to the wetland becomes stabilized with a good stand of LIMITS OF TREE PROTECTION INTERMITTENT SHEET S¢E, 14~ . DISTURBANCE FENCING STREAM DWE
outlet with rip-rap as shown by tying the rip-rap to the endwall rip-rap. Divert the runoff to the grass. The channels near the inlet protection will require periodic sediment removal as site stabilization is temporary sediment trap with the permanent berm. achieved. OFFICIAL
TREESAVE AREA SYMBOLJHATCH SEDIMENT BASIN SKEET
4.5 When vegetation is established, call for a final site inspection. OF
KEY C3A

_ _ _ _ _ _ _ _ -
TOP REBAR RING WELDED _ HANDWHEEL ACTUATOR FOR OPERATING CASE # 003-658
TO BLIND FLANGE. 4" DIP FL-PE WALL COLLAR NOTE: ALL FEROUS COMPONENTS ARE TO BE NOTE: ALL FEROUS COMPONENTS ARE TO BE 4RE TO BE BOTTOM DRAIN VALVE. PROVIDE BRACKET TO NORTH PIN: 0738-03-01-8050
• ANCHORED W/ HIGH STRENGTH FULLY BITUMINOUS COATED INSIDE AN OUTSIDE. FULLY BITUMINOUS COATED INSIDE AND AND STABILIZE RISING STEM. 4.90' INSIDE 0 X 2.5" X 1/4" STEEL Parcel-ID: 541-02-002
• • PORTLAND GROUT. 6"d X 1/2" STEEL PLATE OUTSIDE. BAND FOR MOUNTING TRASH RACK TO
~i'j 1 0.5' FOR WELDING REBAR T0. • • 4" DIP FLANGED T"1 NOTE: SEE DETAIL AT FAR RIGHT FOR DRAIN FOR DRAIN 3 CONCRETE MANHOLE. 8" FLANGED DIP EMERGENCY " )TREK. DRAIN PIPE AND 8"~ FLANGED 4 DIP DRAWDOWN PIPE WITH 2"0
LONG RADIUS ELBOW. 1/2" REBAR TRASH RACK. NO CLEAR ORIENTATIONS REIATNE TO EACH OTHER. • • 30" OPENINGS GREATER THAN 8". • 4" DIP OPENING. 48"0 CONCRETE PRECAST MANHOLE WITH PLUG VALVE W/ RISER ROD & RESTRICTER PLATE FACING EAST. EXTENDED BASE. PROVIDE DOMED TRASH HAND WHEEL. FACING NORTH. SEE DETAIL TO LEFT.
(HIDDEN) 2.5" X 1/4" STEEL BAND FOR WELDING RACK (NO OPENINGS GREATER THAN 8) SEE DETAIL TO LEFT.
REBAR TO AND FASTENING TO 48" MANHOLE. 24" NOTCHED WEIR EL. 258.68'. ; ATTACH TO 48" MH W/ 1/4" GALVANIZED FACING EAST. WELD 1/2" REBAR 258.68'. TOP /SPILLWAY EL. 259.10'. /2" REBAR
DETAIL- (TOP VIEW) AS SHOWN TO PROVIDE OP NI SCREWS & LEAD ANCHORS 8" O.C. E NGS OPENINGS N PRECAST HOLE TO RECENE 30" RCP. L7 GROUT WITH HIGH STRENGTH PORTLAND
4" DIP DRAWDOWN PIPE No GREATER THAN s" CLEAR. " INLET W/ TRASH RACK 8.5 O.C. MAX. BLEAR. z CEMENT GROUT. J ~
SIDE VIEW OF WEIR TRASH RACK. • ° 4" DIP DRAWDOWN PIPE WITH 2"0 ~ 2,D' NOTE THAT THE RACK REBAR IS C1
EXTENDED AND BENT TO PROTECT v RESTRICTER PLATE FACING N.E. C) WEIR FROM DEBRIS BLOCKAGE. 4" DIP DRAWDOWN PIPE WITH 2"0 "0 } / z 47 L.F. 30" CLASS III RCP ®1.00% W MODIFIED
BLIND FLANGE W/ 2"A ~ ~ o"'~ PROVIDE WALL ANCHOR COLLAR. RESTRICTER PLATE FACING EAST, HOLE DRILLED IN BOTTOM L INV. AT M.H.- 257,00' INV. AT M.H.- 257,00' g BELL & SPIGOT MEETING REQUIREMENTS OF ASTM Wrenn E n i n e e r i n C76. PIPES SHALL BE CONFINED 0-RING RUBBER 9 g
TO CONTROL INFLOW. 1- INV. AT INLET- 256.00' 1/2" REBAR WEIR TRASH RACK. INV. AT INLET- 256.00' • I 9.5" SEE SIDEVIEW ABOVE FOR REBAR PROVIDE TRASH RACK. SEE DETAIL in GASKET JOINTS MEETING ASTM C-443 AND JOINTS 65.50' n OF ASTM C-361, PIPE JOINTS SHALL BE TYPE R-2. Civil Engineering
• • L.~ 1 /2" REBAR TRASH ~ C PROFILE. UL n 24" NOTCHED WEIR EL. 258.67'. Land Planning
ORIFICE TRASH RACK. BASKET REBAR TRASH RACK. TO LEFT. d • • RACK CAGE. MAX. 2" ' OPENINGS. WELD 1/2" REBAR TO SEE DETAIL TO LEFT. .d = _ ' FACING EAST: SEE DETAIL TO LEFT. Site Design
8" Fl.ANGED DIP EMERGENCY • • BLIND FLANGE AS DRAIN PIPE AND "0 FLANGED • SHOWN. NO ~O . " 30" RCP OUTLET PIPE.
4" DIP OPENING. OPENINGS GREATER DETAIL- (SIDEVIEW) 5 WALL PLUG VALVE W/ RISER ROD W/ ° > FILL MANHOLE W/ CLASS 3 CONCRETE SEE DETAIL TO LEFT.
(HIDDEN) THAN 2". 4" DIP DRAWDOWN PIPE THICKNESS HAND WHEEL. FACING NORTH. o ;,;::,;-a INV.- 257.00'. USE LEAN + ; ; . • : _ - : < TO ELEV. 254.00' FOR ANTI-FLOTATION. ~ + . ' °'b " USE LEAN PORTLAND GROUT INSTEAD DETAIL- TOP VIEW OF RISER WRENN ENGINEERING CO.
DETAIL- (BOTTOM VIEW) PORTLAND GROUT TO 4" BELOW & AROUND VALVE FOR FUTURE OF CONCRETE WITHIN 4" OF DRAIN SHOWING DRAIN ORIENTATIONS 1910 SEDWiCK RD. .83' VALVE FOR MAINTENANCE. REOUIREDV SUITE 200-C
4" DIP DRAWDOWN PIPE INLET W/ 2" MAINTENANCE INSTEAD OF RESTRICTER PLATE & TRASH RACK. TRASHRACK BLOWUP SCAt_E 1" = 1' TRASHRACK BLOWUP SCALE i" _ POURING CONRETE FLUSH TO OLUMES FOR EXTENDED DETENTION WETLAND
VALVE. BLOWUP - MONOLITHIC EXTENDED MANHOLE BASE. ELEV. FOREBAY MAIN POND ACCUMVOLUME SEDIMENT POND INF R DURHAM, NC 27713 BLOWUP SCALE 1" 3' BorroM ELEV. 251.so . o MAT~oN DIMENSIONS ELEV 91s 806-5082
NOTES: 1, DURING CONSTRUCTION THE RISER WILL BE 4. THE EXTENDp) DETENTION WETLAND WILL BE (S.F.) (S.FJ (C.F.) z5a.oo 3s1 ezO D EMERGENCY SPILLWAY 16', 3:1 S.S. 260.0' (9191 806-5083 fax
SURROUNDED WITH WASHED STONE TO SERVE AS A USED AS A TEMPORARY SEDIMENT CONTROL BASIN 255.OD 55s ,DSO 141a TOP OF DAM WIDTH 10' 261.0' NMM!WRENNENG.CDhf 255.50 651 1190 2276
CLEAN BASIN OUT TO DESIGN VOLUME AFTER SEDIMENT FllTpt BEFORE THE WATER ENTERS THE RISER DURING CONSTRUCTION AND MU5T 8E CLEANED 24" NOTCHED WEIR EL. 258.68' TEMPORARY SEDIMENT MEASURE IS REMOVED. AND OUTLET PIPE. OUT, VEGETATED, AND OPERATIONAL PRIOR 'f0 USE z5s.oo 75z 1325 3257 ANTI-SEEP COLLAR 25x.25 Bos lsos 3818 N A N A
AS A WEi DETENTION BASIN AND Bp"ORE ANY 1. THE 4'4 DRAWDOWN PIPE, THE 24" WpR , ANO THE PERMANENT BUILDINGS ARE OCCUPIED, 48~ z5s.5o 65s 4x11 4641 RIP RAP DISSIPATOR PAD RIPRAP LINED CHANNEL
#57 WASHED STONE TO ELEV. OUNTED TO EACH OPENINA TERMANENT TRASH RACK 5. OVEREXCAVATE 12` DEEP ALL AREA 4" DIP DRAWDOWN PIPE WITH 2°'~ G 0 PREVENT DEBRIS FROM S BA`, 48 ~ CONCRETE PRECAST MANHOLE WITH EXTENDED 256.75 s1s 543o sass zSZOO s71 Bsz6 634s ANTI-FLOATATION DEVICE 4'~ X 1.81' 254.0'
257.0'. ENCIRCLE ENTIRE ENTERING. THE OPEN AREA OF EACH ORIFlCE'S TRASH aSSDCwTEO VntH wETIANO PLANTiNG PLAN AND RESTRICTER PLATE. BASE. PROVIDE DOMED TRASH RACK (NO OPENINGS , ELEV. FOREBAYB ACCUMVOLUME TOP OF RISER 48 MANHOLE 259.1
RISER WITH STONE FILTER. RACK MUST EXCEED THE ORIFCE AREA TO PREVENT FLOW REPLACE WffH ORGANIC TOPSOIL STOCKPILED FROM GR RESTRICT 8" BOTTOM DRAIN TO RESTRicnoN, sEE oETAiLS. slfE. SEE SHEET wQ1. INV. AT M.H.- 257.00 GREATER THAN 8 } MAIN POND (c.F.>
6 1/2 DIAMETER AND COVER SP W/ CHICKEN WIRE (1/2" ("-1.0' 3. THE 30" BARREL IS CLASS tll RCP, MODIFIED BEII AND 6. OVERIXCAVATE THE MICRO POOL AND FORBAY INV. AT INLET- 256.00 SPILLWAY EL. 259.10' (s.F.> OUTLET PIPE INVERT IN 30" RCP 254.0' z~a:G~o ; o3ss ins OUTLET PIPE INVERT OUT ' 30 RCP 253.53
OPENINGS) TO PREVENT WASHED SPIGOT, MEETING THE REQUIREMENTS OF ASTM C76. PIPE TO ELEVATION 253RD' (1' BELOW DESIGN GRADE) JOINTS SHALL BE CONFlNEO 0-RING RUBBER GASKET TO ALLOW TOR SEDIMENTATION VOLUME. zaa:sa izo a zs~4ss SEDIMENT STORAGE AREA 10 298 S.F. 257. Q'
STONE FROM ENTERING HOLE. JOINTS M LNG - EET ASTM C 443 ANO JOINTS OF ASTM C-361. 5 259.00 12478 30423
PIPE JOINTS SHALL BE TYPE R-2. ( 0.00' 260.00 94004 43664
\3•~ - Ex. _ DAM EL. 261.0" : 16' WIDE EARTHEN BROADCRESTED WEIR
I - GROUND - I-_ , I-_ ROFILE (VARfES EMERGENCY SPILLWAY ELEV. 260.0 . -t;~ e _ I~!`~,,, LINE 20 L.F. OF DITCH ~]p~~~~
- - _ - . SED11'iIENT-STORAGE- T(}-ELfV...._ 257.5-'-..._.. q , R l1 A1h ®,qp ~ I:~ - - 30 RCP F W RIP-RAP. I ~la~
, I- , - ~ - - - I ~ 7 ELEV. 253,53'. RIP-RAP UP TO ELEV.
~ - ~ SEDIMENT STORAGE VOLUME- 13,323 C.F. ~ . - 255.53. SEE PLAN.
_ 47 L.I 47 L.F. 30" RCP 1.00 W E -
CD1A SECTION THR ~ POND INVERT EL. 254.0' TIGHT OUGH STONE OUTLET FLLTER _ _ TIGHT 0-RING GASKETTED CT N .
C3A SCALE 1" = 5' SEE PLANTING PLAN FOR WETLAND - -
PLANTING SCHEDULE FOR BASIN. - - 1 - - ~ L - -
8" BOT. DRAIN & VALVE EL. 254.00'. - - 3
- I~ - 30 RCP OUTLET ~--~o.oo' INVERT EL. 254.0' CORE OF DAM TO BE SELECT LOW PERMEABILITY CLAY
MATERIAL AND COMPACTED TO 98% DRY DENSITY. WHERE
CDE so' MIN. SECTON THROUGH SEDIMENT BASIN EXTENDED BASE OF CORE IS IN CUT, VIRGIN MATERIAL MAY BE LEFT IN PLACE IF o 0 E DETAIL AT UPPER RIGHT ~ o
BUT SUFFICIENT TO KEEP 1. PUT SILT FENCE OR TREE PROTECTION FENCE UP " ' NOTE: SEE DETAIL AT SEDIMENT ON SITE TO ENSURE CONSTRUCTION ENTRANCE IS USED. C3A SCALE 1 = 6 PRECAST MANHOLE. CONC. FOR DRAIN ORIENTATIO N ORIENTATIONS RELATIVE DETERMINED TO HAVE ADEQUATE CONSOLIDATION & o I
- „ _ 2. IF CONSTRUCTION ON THE SITES ARE SUCH THAT BASE EL. 251,60 TO EACH OTHER, OTHER, PERMEABILITY BY FIELD ENGINEER. ~ N IO
- THE MUO IS NOT REMOVED BY THE VEHICLE TRAVEL- ;~l ='~2"-3" STONE TO BE~USED"';~~: 25' OR WIDTH OF LNG OVER THE STONE, THEN THE TIRES OF THE ~Oi
"~s4' , EXISTING `.~~s(SURGE STONE OR RAILROAD PROPOSED STREET, VEHICLES MUST BE WASHED BEFORE ENTERING THE e~y% HWY #55 t ; ,.BALLAST)'< i;; ' I PUBUC ROAD, °'CI ~ i 5 FT ~I~
WH CHEVER IS GREATER. 3. IF A PROJECT CONTINUES TO PULL MUD ANO DEBRIS MIN P~ I O ~ ~ ,gyp SPILLWAY SLOPED ~ 1.0~ TOP OF DAM O I
CN TO THE PUBLIC ROAD, THE GOVERNING AUTHORITY :,:.;,;.y WILL CLEAN THE AREA AND INVOICE THE FlNANCIALLY ~
RESPONSIBLE PERSON AS INDICATED ON THE FlNANgAL 'S 1800 CU FT ACRE p1~ RESPONSIBILITY FORM. NOTES: ti / o ~b , i-,.,,: 1.0' DEPTH EL 261.0' ~ ~ ~ ~ GRASS LINED SPILLWAY EL 260 0' { (
t •1 0 2, 5 FT W U
1. USE FOR DRAINAGE AREAS 2• ~ MAX NOT EXCEEDING 5 FIVE ACRES. 12' MIN, o ~ PLAN ( ) p Do d~ ~ ~ Z L
2. EARTH BERM SHALL BE STABILIZED w/ SEEDING ~ M 1 ~ N y 1 Tt Y
ACCORDING TO TRIANGLE SPECIFlCATIONS. FLTER h ..t ~~i
CROSS SECTION FABRIC s X , y { ~ 4 .F,' ~ Q ~...1 yC~3 4 t_'7v y{. 1 ~ A.'Y l
NEW CONSTRUCTION 3. USE CLEAN COMPACTOR FILL MATERIAL FOR EARTH BERM. 35' MIN. 15' MIN. EXISTING ROADWAY ti F , PERMANENT SPILLWAY LINING: ~ ~ • ~ ~ , ~ : IJNE EMERGENCY SPILLWAY UP TO ELEV.
DESIGN OVERFlLI 6" SETTLED FOR SETTLEMENT 'T ' 260.50' WITH TURF REINFORCEMENT 0
f~ MIN -111 . T..-~1i ' 6 MIN. .>;:.,•;r' 0 - - -d-d.~a1~:'u..:L~:`>I. w- MATTING RATED AT 8.0 L8/S.F. LINE J J P01~ +IC1' SPILLWAY SPILLWAY INSIDE AND OUTSIDE OF POND.
>>;~ysy, :r•, S, ~ 1' FREEBOARD II~II~I II~i PERSP TI VI O C~ EC VE EW QL
~o p l
F I N T ~ 1.5 FT [5J0 10 FT MIN ~ts' - ~I I II ~ 1 2:1 SIDE f'~
C'D2 R TIN FT ~ o °o°~ 0 00 I SLOPE MAX GRAVEL CONTRUCTfON ENTRANCE C OSS SEC 0 1 5 o a og _ f W 0
MAX FILL o 0 oOo~~ I, ~ U
~A 1 ~~I~I opoo~~,oOop _ FILTER oa,~~8 ~Q' 1:1 SIDE SLOPE / ~ z
~ FABRIC I ~~~o I-_' MAX NATURA 0
3 FT p MIN e' MAx ~ O
NOTE: MAINTENANCE VARIABLE AS DIRECTED BY THE EN(AIEER
THIS DETAIL APPLIES ONLY TO YCB-1. INSPECT TEMPORARY SEDIMENT TRAPS AFTER EACH PERIOD OF SICNIFlCANT RAINFALL REMOVE SEDIMENT AND RESTORE TRAP TD ITS ORIGINAL I ; ; i
TOP OF SILT FENCE ELEVATION = DIMENSIONS WHEN THE SEDIMENT HAS ACCUMULATED TO ONE-HALF 1HE DESIGN DEPTH OF 'DIE TRAP, PLACE THE SEDIMENT THAT IS REMOVED IN 262.10' AND IS 0.50' BELOW BERM. STANDARD METAL POSTS 2'-0" IN GROUND A DESIGNATED DISPOSAL AREA AND REPLACE THE CONTAMINATED PART OF THE GRAVEL FAgNG. wx. tx-i/z CA.
LEAVE INLET TOP BLOCK WORK LOW IN CHECK THE STRUCTURE FOR DAMAGE FROM EROSION OR PIPING. PERIODICALLY CHECK THE DEPTH OF THE SPILLWAY TO ENSURE IT IS A MINIMUM INTERMEDIATE NN. 10 CA yA~g
ORDER TO MEET REQUIRED GRAVEL ~4A TEMPORARY GRAVEL & RiPRAP BASIN "A" of 1.5 FT BELOW 1HE LOW POINT OF 1HE EMBANKMENT. IMMEDIATELY FBL ANY SETTLEMENT OF THE EMBANKMENT TO SLIGHTLY ABOVE DESIGN FILTER THICKNESS. TEMPORARY INLET GRADE. ANY RIP RAP DISPLACED FROM THE SPILLWAY MUST BE REPLACED IMMEDIATELY. lR1E WIRES 9 FENCE F - ~
TOP ELEV. = 261.1' MAX. GALVINIZED MA STABILIZE THE EMBANKMENT AND ALL DISTURBED AREAS ABOVE 7HE SEDIMENT POOL ANO DOWNSTREAM FROM THE TRAP IMMEDIATELY AFTER IN iALLEO TO COIID T ' i . ..i~,M. ......x.......
HARDWARD WIRE W/1 CONSTRUCnON WiTH sEEDINC. EXTENDS TO GRADE ' W
TOP OF BOX ~ / J W
J a
- r;~, - ~.t - ~ ~ TOP OF SEDIMENT STORAGE CULVERT & F.E.s. FRONT VIEW
- ~ ( ELEV. 260.50 SHADEDAREA
~ = ( t~ WITHIN DASHED LINE .k-' ) i ' Ir,
'y's„ t.~r - " I , STEEL. POST
~ r'J 1 > i ~1, f r ~f~ If ~ ~'~::i ~ NELOFD MIRE FABRIC , . sL FENCE cEOTExnIE FABRIC ,i ~.^i
,r . A
' ~ ~ / TEMPORARY SEDIMENT BASIN „A,. LOCATED EAST SIDE OF DOUBLE 54 CU RIP-RAP LAYER ; `,~wf~"a ~ -USE 9LT FENCE ONLY YMEN DRAINAgi AREA b c F.E.S. y 6 ~ ~ ~ Z DOES NOT IXCEED 1/4 ACRE AND NEVER IN I ~ ~ (SEE PLAN FOR ~`~r',"~•~:, "~~~~,~7 Q AREAS aF caNCalRA1m FLOW " ~
` ~ ,'~~I - • , CB 1 "I t ~ DA= 3,07 AC., DIST. D.A.= 2.85 AC. RIP-RAP CLASS ^ " ~ _ ~ ~ FOR REPAIR OF 9LT J ry:r a.,-L~v.~w:~1iyL,~v., W -END OF 9LT FENCE NEEDS N BE NRNED UPItlU_ ~ s~.:, No.S WASHED STONE
a I ~J 'r~ 1;, ~ aT~, ~ ~ / REQ. VOL= 5,130 C.F. (1,800 C.FJDIST-AC,IYR.) > li~~ ~ ,~~~'~ny....:•r.r~r~v~jr.~ D D. .LJ~,+ , ~}l,: ~ z ka( W N NN''--~. / ~ ~ ~ CRADE FOR ANCHOR WHEN SILT _ . i t. r"i Lt`s'., ~,~~-i t E ~ l . ~ (n W r^-4!i':,-. v, p, fENCE IS PROTECTING
~ - r. ~j / REQ. S.A.= 0.01 X 10.9 CPS= 0.109 AC. (4,748 S.F.) _ . ,'I^;f t i., ,fix,, r 'T ~,l i LA i,k',',~ " L W , i~l,,a~', 1,: ~ ! l 1.,aV. CATCH BA9N. Z
P ~ ~ - LENGTH TO 411fIDTH RATIO > OR = TO 2.0 h Q' SEE PLAN ~ "*r"tr;.,.k: ~.v..tj~i ~.~s~..:'. x., 4.... b B• MIN. corm O ~.,~J, .{'ra, r..i. t.`: l,.}., I OVER SKIRT ~ FILTER FABRIC ~ ''ti ~ ~ , J , t ~ SILT FENCE "
~ ~ ~ 0 Jv / BASIN DESIGN SA AND VOL DATA ?.1.._+. ~ CD7 • ANCHOR SKIRT AS PROFILE VIEW DIRECTED BYENgNEER" }
57 WASHED STONE PLACED TO A HEIGHT J V / w qA ~ SEE PLAN SID VIEW O ~
~ INLET PROTECTION # " 0 ~ ` , ; ELEV. AREA ACCUM. VOL. OF 12 -18' MIN. ABOVE TOP OF BOX 0 Q / ~ 258.5' 465 S.F. 0 C.F. ~
C3A ~ Q" / 259.0' 912 S.F. 344 C.F. ~ RIP-RAP APRON PLAN VIEW N I
~ 260.0' 2 342 S.F. / 1,971 C.F. C3A ~ ZQ
~ 260.5' 4,639 S.F. 3,716 C.F. ~o N
h / ' 261.0 4,965 S.F. 6,117 C.F. MOVE FENCE OR MOVE FENCE Olt REMOVE I
REMOVE TREE IF MORE sEauENGE: ~ ~ ~ 11' WIDE EMERGENCY ~i S 1. OBTAIN APPROPRIATE PERMITS , TOP ELEVATION OF T RMWA O S 0 TER (~A Z W ....._..J_ .
Is uNRROTECTm. 0 2. HOLD A PRECONSTRUC110N CONFERENCE 1MTH THE LANDSCAPE PROTEC110N SUPERMSOR, / SPILLWAY, ELEV. 261.0. cTm cawsmucnoN ARCHITECT OR LANDSCAPE ARCHITECT AND URBAN FORESTER. I / -1 OYR = 1 O ,VNEA 3. ERECT TREE PR01EC110N FENCING ~ Q .9 CPS, M :"T~... 0.5 -1
4. CLEAR AND GRUB TREES AND SHRUBS TO EIE REMOVED 5. INSTALL SOiI AND EROSION CON1ROl MEASURES J / ';r'a^•i !"i, 2/3 W TYPICAL RIP RAP CHANNEL - /57 WASHED ~Y` ~ ' -T!~ STONE MAX, a Senior Engineer, } (ray., '~t ~
8. RWOH GRADE SITE / / I f ~ - 7. EXCAVATE FOR FOOTINGS, INSTALL U71U71ES AND CONSTRUCT BUILDMG ~i : ir• ' rl l~~ :-1.--: ~ . t`ITI~T DESIGN OF SPILLWAYS ~ IC. WRENN ...a .l: =,IF W = I: EXISTING SLOPE ,m tr . , l:^ 1
& FMlISN FlNAL GRADING AND PAVkJG < . c1Nn Roo zoNE 9. REMOVE TREE PROIT:C110N FENCING I 18" :.t 10. INSTALL LANDSCAPING ~ / i ~ ~ ~ ~ z. ~ .Ir:. - 4" to 12" ~ DRAINAGE AREA WEIR LENGTH :Yf d" ?':::1Tt = ~5~911 ' - - : (ACRES) (FT) CLASS TRIP-RAP FD_TER FABRIC
0 Q M04E ~ B" OR REMOVE 1~~,. I , 'I,- ,E-- -:1:::-1, u,,. h, ~I'C1VVr1 ~f, FlLTER FABRIC OR y 8A VAPoES
o ,REE ~ ~ / L : ~ ~ _t GRAVEL BEDDING FILLER FABRIC OR 3 8.0 K. r1flGNN GRAVEL BEDDING 4 10.0
J ann zaNE o , ~ PARABOLIC-SHAPEI ABOLIC-SHAPED WATERWAY WITH STONE CENTER DRAIN TRAPEZOIDAL 1 DIMENSIONS S?IOWN AREIMNIMUM I ~ W ISSUE
NOTES: 1. R00T PRUNE 1REES TO REMAJN WHERE CONSTRUCTION ACTIV111ES HILL SEVER ROOTS. (SHAPED BY BULLDOZER) R~~~ Fy~,~ EXISTING SLOPES NO. DATE DESCRIP110N
2 ANY TREE R001S EXPOSED BY CONSTRUCTION SHALL BE SEVERED CLEANLY N17H A pERMANE PRUNING TOOL NT BERM 3. 00 NOT DISPOSE OF ANY CHEMICALS OR REMOVE SOIL WTSIDE THE LIMITS OF WORK. TO eE USED WHERE EXCESSIVE S Mwa ~ ~ ~ S O4 CONSTRUCTION REVIEW TOR TER
4. WHEN INSTALLING NEW UNDSCAPE PLANTS, DO NOT DRIVE EQUIPMENT UPON OR ORANGE IENSAR PLASTIC FABRIC OR ]:WAL DISTURB THE SOIL NITHRJ 1HE CRITICAL ROOT ZONE OF EXISTING TREES. HEIOHTN OF BE APPRN•IA1ElY 4 VELOCIIIES PROHI811 VEGETATIVE LININGS. ~l;y' HEIGHT & WIDTH DETERMINED BY Ic±~~~ ~~r EXISTING TOPOGRAPHY ANO 2 T2 T5 C~~NI~HRI/VIFi/NREVICII~ SEDIMENT STORAGE REQUIRED.
5. AT THE START aF GRADING INVOLVING 1HE LOWERING OF EXISTING GRADE AROUND e' S1EEI. t0 . SPACING MAJOMIM f-- ATREE OR STRIPPING OF TOPSOIL, A CLEAN, SHARP, VERTICAL CUT SHALL BE W SIZE OF STONE MUST BE DETERMINED BY VARIES APPROPRIATE DESIGN PROCEDURE. ~ ~ KEY RIP RAP INTO THE DAM
MADE AT THE EDGE OF 1HE TREE SAVE AREA AT 1HE SAME 71ME AS OTHER i J`; D,-:._,~ ION CONTROL MEASURES ARE INSTALLED. 1HE 1REE PROTECTION FENCING ;---.0,_.._, ..z1;: `,:j-~°;~ I ff~';~--~) FOR STABILIZAl10N. it ) ( d I..f-~ .(;_.:7~ DIMENSIONS FOR d & W VARIES ACCORDING l
SHALL BE INSTALLED ON THE SIDE OF THE CUT FARTHEST AWAY FROM THE TREE t ` 1RUNK, AND SHALL REMAIN IN PLACE UNTIL ALL CONSTRUC110N IN THE V1gNITY ~ ~ I; 1. ~i~ , Y _ , - TO DESIGN. ifl , 6"-i' f.'
OF THE TREES IS COMPLETE. NO STORAGE OF MATERIALS, FILL OR EQUIPMENT ' ~ ~I _ 18" 'a 1B -17E=y;~ . .--:I'._-s~~ RIP RAP OFDTIJ AC DFR f1FCif]J f1R RFCCR Tn ''~_•-r---{-'--•...-,...-.....-- J1f~
AND NO TRESPASSING SHALL BE ALLOWED WITHIN THE BOUNDARY OF THE 6» 111111 11 1111-FT-TIETEEIIIIIIIII III IRIII I III ITT- PROTECTED AREA. . 6"7~ FILTER FABRIC OR TABLE w as KEYED RIP RAP DATE DRAWN RLE NAME
"NO TRESPASSING gDN1 TREESA1f AREA" 1 6. THE ROOT PROTECTION ZONE IS AN AREA THAT COVERS V RADIUS FROM THE SIGNS TO RE INSTALIFD ON TREE PROTECTION TRUNK FOR EACH 1" CALIPER OF THE TRUNK. FENaNG AT A MAIRNM OF 75' 0.C. PROTECTION F 7. WH I GRAVEL BEDDING > a ° °
TREE PROTECTIONEFENCING SHALL ENCIBENG AND SILT CLOSEST TO THE EWOODUNETME VOTTEN IN STN SPANISH AND ENGLISH. V- HAP WA TABLE .LL e..1, p57 WASHED STONE -SHAPED WATERWAY WITH STONE CENTER DRAIN :STONE CLASSIFICATION , . RIP, RAPS DEPTH PROJECT 03101,00
8. TREE PROTECTION FENCE TO BE MARKED EVERY 75 TO 100 FEET APART WITH SIGNAGE IN BOTH SPANISH AND ENGLISH SAYING "KEEP OUT' (SHAPED BY MOTOR GRADER) p g FRONT VIEW
B 18 SHEET SIDE: DW L36 CLASS 1 24 ` `
- TEMPORARY GRAVEL & RIPRAP BASIN "A" CD6 - _ ; , CLASS 2 24"-36" EXISTING SLOPE
TREE PROTECTION FENCING RIP-RAF RIP-RAP LINED CHANNELS CDg ROCK CHECK DAM STEP SEQUENCE *EET C3B
qA SCALE 1 = 20 qA qA qA OF
RIP RAP LINED CHANNELS C A