20080969 Ver 1_More Info Received_20080623

KELLER ENVIRONMENTAL
ENVIRONMENTAL CONSULTANTS
June 23, 2008
Cyndi Karoly
NC Division of Water Quality
401 Wetlands WQ Certification Unit
1650 Mail Service Center
Raleigh, North Carolina 27699-1650 ( ??,n (J
Re: Brandemere Subdivision
Keller Environmental Job No. 0635 2 3 208
DWQ Project # 08-0969
Wake County, North Carolina ?EK(10AUTv
WE1 LANDS AND STORMWATER BR""
Dear Ms. Karoly:
Thank for your staff's assistance with this project. We are submitting the additional
information requested from written correspondence on June 20, 2008. We are requesting
for NC Division of Water Quality (DWQ) written approval under Section 404, Clean Water
Act, 33 USC 1344 and the Neuse River Buffer Rules. We have addressed your included
written comments in the following paragraphs.
1. Impacts:
a. The PCN form (signed June 16, 2008) lists the total
stream impact to be 132 linear feet, while the plan sheet
(ENGR 200G) lists the impact as 143 linear feet. Please
ensure the correct impact amount is listed on both the
plan sheets and the PCN form.
b. The PCN form also lists riparian buffer impacts for Zone
1:6,760 ft2 and Zone 2:3,984 ft2, totaling 10,744 ft2, while
the plan sheet (ENGR 200G) lists the impacts as: Zone
1:6,276 ft2 and Zone 2:3,637 ft2, totaling 9,795 ft2 (in
actuality these impacts total 9,913 ft2). Please ensure the
correct impact amounts are listed on both the plan
sheets and the PCN form.
We apologize for the discrepancy between the PCN and the Plan Sheets.
The Plan Sheets accurately depicted the proposed stream and riparian buffer
impacts. Therefore, the correct proposed stream and riparian buffer impacts are
143 LF, 6,276 ft2 (Zone 1) and 3,637 ft2 (Zone 2), respectively. The PCN has
been corrected to reflect these proposed impact amounts. Plan Sheet ENGR
20OG has also been corrected to show 9,913 ft2 in proposed riparian impacts.
DWQ 401 Certification &
Neuse R. Buffer Rules Re-Submittal
Brandemere Subdivision
June 23, 2008
Page 2 of 2
2. Diffuse Flow:
a. The bypass channel dimensions on the level spreader
supplement forms for both the North and South Dry
detention ponds show different dimensions than those
on the plan sheets. Primarily, the bottom width and
depth of channel values differ. Please ensure the correct
dimensions are shown on both the plan sheets and
supplement forms. You may use a typical section such
as the one shown as Flat Bottom typical detail on Plan
Sheet SITE 500 with a table of the dimensions (such as
bottom width, top width, side slopes and flow depth) for
both the North and South Ponds' bypass channels.
Please ensure that the depth of each channel is at least 1
ft.
The plan sheets and supplement forms have been corrected to match
each other and depict the correct bypass channel dimensions. The depth of
each bypass channel is 1-foot. Thank you for noticing this discrepancy.
If you should have questions or require additional clarification please feel free to contact
me at 844-7437 (office), 749-8259 (cell) or email: iayOkellerenvironmental.com.
Sincerely,
Keller Environmental, LLC

Jay Keller
Principal
Cc: Jamie Shern, USACOE Raleigh Regulatory Field Office
Attachments: Please refer to the June 23, 2008 Transmittal Letter
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June 20, 2008
CERTT]FIED MAIL: RETURN lRECEIF T REQUESTED
Spring Forest Road 1,1.10
Attn: Ms. Carolyn Grant
3321 Blue ltldgc Road, Suite 109
Ralcigh, NC 27612
Subject Property.- Bran detne.re Kubdivision
RE- QUEST FOR MORE IN]rORMATION
Dcar Ms, Grant:
IDWO EXP No. 08-0969
Wake County
JUN 2 3 2008
DENR - WATER QUALITY
WETLANDS AND STORMWATER BRANCH
On June 19.2008, the Express Review Program of the Division of Water Quality (DWQ) received your
application for the above referenced project. The DWQ has determined that your application will require
additional information. Please provide the following information so that we may continue to mvfew
your Frc ject and prevent denial of your application as required by 15A NCAC 211,0506:
Additioaul Information Requested
Impacts:
a. The PCN fora, (signed June 16, 2008) lists the total stream impact to be 132 linear feet, while
tha plan sheet (ENGR 2000) lists the impact its 143 linear feet. Please ensure the correct
impact amounts listed on both the plan sheets and the PCN form.
b. The PCN form also lists riparian buffer impacts for Zone 1.: 6,760 W and Zovlc 2: 3,984 ft2,
totaling 10,744 fly, while the plan sheet (ENGR 200G) lists the impacts as: Tone 1:6,276 ft'
and Zone 2: 3,637 fill totaling 9,795 R' (in actuality these impacts total 9,913 fF), Please
ensure the correct impact amounts are listed on both the plan sheets and the PCN form,
2. Diffuse flow!
a. The bypass channel dimensions on the level spreader supplement forms for both the North
and South Dfy detention ponds show different dimensions than those on the plan sheets.
Primarily, the bottom width acrd depth of cbannel valties differ. Please ensure the correct
dimensions arc shown on both the plan sheets and supplernent fonns. You may use a t rpiaa€
scctio.n such as the one shown as f=lat Bottom typical detail on Plan Sheet SlT'E 504 with a
table of the dimensions (such as bottoms width, top Width, sine slopes, and flow depth) for
both the North anti South Ponds' bypass channcls. Please ensure that the depth of each
shanks) is at least 1 ft,
1Plcasc respond within five (5) days of the date of this letter by sending two (2) copies of' the above
information in writing. The Express Review Progrwn is a process that requires all partics to participate in a
timelymanner
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Page 2 of 2
June 20, 2008
This letter only addresses the application review and does not authorizc 3.ny impacts to wetlands, waters
or pmtected buffers. Please be aware that any impacts requested within your application arc riot
authorized (at this time) try the DWQ.
'lease contact Joseph Cwyamfi or Lia Myott Gilleski at 919-733.3786 if you have any questions regarding
or would like to set up a meeting to discuss this matter.
Sincerely,
?4
Cyndi Karoly, Supervisor
401 Ovctsight/Express Review Permiliing Unit
milmg
cc: USACE Raleigh Regulatory Field Office
Lauren Witherspoon, DWO Raleigh Regional Office
File Copy
Central Files
Jay Keller, Keller Environmental, 7921 Haymarket LLanc, Raleigh, NC 27615
4
Office Use Only: Form Version March 05
USACE Action ID No. DWQ No. EXP 08-0969
m any pamcuiar item is not appucable to this project, please enter "Not Applicable" or "N/A".)
1. Processing
1. Check all of the approval(s) requested for this project:
® Section 404 Permit Z Riparian or Watershed Buffer Rules
F-1 Section 10 Permit Isolated Wetland Permit from DWQ
® 401 Water Quality Certification ® Express 401 Water Quality Certification
2. Nationwide, Regional or General Permit Number(s) Requested: NWP 14
3. If this notification is solely a courtesy copy because written approval for the 401 Certification
is not required, check here: ?
4. If payment into the North Ca-olina Ecosystem Enhancement Program (NCEEP) is proposed
for mitigation of impacts, attach the acceptance letter from NCEEP, complete section VIII,
and check here: ?
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: ?
r`73 0? 0?
II. Applicant Information L
JUN 2 3 2008
1. Owner/Applicant Information
Name: Spring Forest 1 LLC; Carolyn Grant DENR-WATER Qunurr
Mailing Address: 3221 Blue Ridge Road Suite 109 RBRANCH
Raleigh NC 27612
Telephone Number: 919-782-5113 Fax Number: 919-782-5115
E-mail Address: ed(a)omegapg.com
2. Agent/Consultant Information (A signed and dated copy of the Agent Authorization letter
must be attached if the Agent has signatory authority for the owner/applicant.)
Name: Jay Keller
Company Affiliation: Keller Environmental
Mailing Address: 7921 Haymarket Lane Raleigh NC 27615
Telephone Number: [phone] Fax Number: [phone]
E-mail Address: jay ankellerenvironmental.com
Page 1 of 9
J
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 11 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.
1. Name of project: Brandemere Subdivision
2. T.I.P. Project Number or State Project Number (NCDOT Only): N/A
3. Property Identification Number (Tax PfN):Parcel 1- 1736061630, Parcel 2-1736051941
Parcel 3- 1736053307, Parcel 4- 1736052239
4. Location
County: Wake Nearest Town: Raleigh
Subdivision name (include phase/lot number):
Directions to site (include road numbers/names, landmarks, etc.): Site is located north of
the US1 and US401 intersection. The physical address is 5431 Louisburg Rd
5. Site coordinates (For linear projects, such as a road or utility line, attach a sheet that
separately lists the coordinates for each crossing of a distinct waterbody.)
Decimal Degrees (6 digits minimum): 35.85215°N 78.560033°W
6. Property size (acres):Parcel 1(3.06), Parcel 2(15.6) Parcel 3(.77) Parcel 4(.75);
TOTAL - (20.18)
7. Name of nearest receiving body of water: Beaverdam creek
8. River Basin: Neuse
(Note - this must be one of North Carolina's seventeen designated major river basins. The
River Basin map is available at http://h2o.enr.state.nc.us/admin/maps/.)
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 is undeveloped mature hardwood forest. The
surrounding land use is commercial and residential
Page 2 of 9
10. Describe the overall project in detail, including the type of equipment to be used: 99 low
density homes are proposed for Brandemere Subdivision. Impacts associated with
this project is one stream crossing along with Neuse River Buffer Areas affiliated
with the stream crossing. Equipment to be used includes pumps, trackhoes,
bulldozers, and other land grading and bridge equipment.
11. Explain the purpose of the proposed work: The proposed impacts to UT to Beaverdam
Creek will be necessary to complete Brandemere Subdivision project. Locations of
the roads have been designed in accordance with the area's master plan.
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.
On July 6, 2006, Eric Kulz visited the site (Spring Forest Rd Property - NBRRO 06-170)
and made a buffer determination call (information packet attached).
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.
No future plans or permits are anticipated.
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. Each impact must be
listed separately in the tables below (e.g., culvert installation should be listed separately from
riprap dissipater pads). Be sure to indicate if an impact is temporary. All proposed impacts,
permanent and temporary, must be listed, and must be labeled and clearly identifiable on an
accompanying site plan. All wetlands and waters, and all streams (intermittent and perennial)
should 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.
1. Provide a written description of the proposed impacts:
Impact Area 1 is located approximately 600 feet northeast of the southwest property
corner and 150 feet off the west property line. Impacts associated with this crossing are
Page 3 of 9
143 LF of intermittent stream and 9,913 SF of Neuse River Riparian Buffers (NRRB).
This crossing will involve 98-feet of one sunken 54-inch diameter RCP and 26-feet of
Class B rip-rap velocity dissipater.
2. Individually list wetland impacts. Types of impacts include, but are not limited to
mechanized clearing, grading, fill, excavation, flooding, ditching/drainage, etc. For dams,
separately list impacts due to both structure and flooding.
Wetland Impact Type of Wetland Located within Distance to Area of
Site Number Type of Impact (e.g., forested, marsh, I00-year
Floodplain Nearest
Stream Impact
(acres)
(indicate on map) herbaceous, bog, etc.) (yes/no) (linear feet)

Total Wetland Impact (acres) 0
3. List the total acreage (estimated) of all existing wetlands on the property: 0
4. Individually list all intermittent and perennial stream impacts. Be sure to identify temporary
impacts. Stream impacts include, but are not limited to placement of fill or culverts, dam
construction, flooding, relocation, stabilization activities (e.g., cement walls, rip-rap, crib
walls, 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. To calculate acreage. multiDly length X width. then divide by 43.560.
Stream Impact
Perennial or Average Impact Area of
Number Stream Name Type of Impact Intermittent? Stream Width Length Impact
(indicate on map) Before Impact (linear feet) (acres)
UT to Culverts &
1 Beaverdam Dissipater Pad Intermittent 4' 143' 0.013
Creek

Total Stream Impact (by length and acreage) 143' 0.013
Ac.
5. Individually list all open water impacts (including lakes, ponds, estuaries, sounds,
Atlantic Ocean and any other water of the U.S.). Open water impacts include, but are
not limited to fill, excavation, dredging, flooding, drainage, bulkheads, etc.
Open Water Impact Name Waterbody Type of Waterbody Area of
Site Number (if applicable) Type of Impact (lake, Pand estuary, sound, bay, Impact
(indicate on ma) ocean, etc.) (acres)
None
Total Open Water Impact (acres) 0
Page 4 of 9
6. List the cumulative impact to all Waters of the U.S. resultinP from the proiect:
' Stream Impact (acres): 0.013Ac.
Wetland Impact (acres): 0
Open Water Impact (acres): 0
Total Impact to Waters of the U.S. (acres) 0.013 Ac.
Total Stream Impact (linear feet): 143 LF
7. Isolated Waters
Do any isolated waters exist on the property? ? Yes ® No
Describe all impacts to isolated waters, and include the type of water (wetland or
stream) and the size of the proposed impact (acres or linear feet). Please note that this
section only applies to waters that have specifically been determined to be isolated by
the USACE.
8. Pond Creation
If construction of a pond is proposed, associated wetland and stream impacts should
be included above in the wetland and stream impact sections. Also, the proposed
pond should be described here and illustrated on any maps included with this
application.
Pond to be created in (check all that apply): ? uplands ? stream ? wetlands
Describe the method of construction (e.g., dam/embankment, excavation, installation
of draw-down valve or spillway, etc.):
Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout
pond, local stormwater requirement, etc.):
Current land use in the vicinity of the pond:
Size of watershed draining to pond: Expected pond surface area:
VII. Impact Justification (Avoidance and Minimization)
Specifically describe measures taken to avoid the proposed impacts. It may be useful to provide
information related to site constraints such as topography, building ordinances, accessibility, and financial
viability of the project. The applicant may attach drawings of alternative, lower-impact site layouts, and
explain why these design options were not feasible. Also discuss how impacts were minimized once the
desired site plan was developed. If applicable, discuss construction techniques to be followed during
construction to reduce impacts The proposed Black Maple Drive (BMD) was
strateaicallv placed at the uoaer end of the UT to Beaverdam Creek and above
the stream's transition point to perennial. It was also placed perpendicularly to
the stream and the culverts will be placed ap proximatel y 1-foot below the stream
bed in accordance to best management p ractices ( BMP's) to allow aquatic
passage. The pro posed stream crossin g location of BMD will allow inter-
connectivitv between Smina Forest Road and Hiahwav 401 and the larae
northern and southern upland areas.
Page 5 of 9
VIII. Mitigation
DWQ - In accordance with 15A NCAC 2H .0500, mitigation may be required by the NC
Division of Water Quality for projects involving greater than or equal to one acre of
impacts to freshwater wetlands or greater than or equal to 150 linear feet of total impacts
to perennial streams.
USACE - In accordance with the Final Notice of Issuance and Modification of
Nationwide Permits, published in the Federal Register on January 15, 2002, 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 for USACE or DWQ to consider the application complete for processing. Any
application lacking a required mitigation plan or NCEEP 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 http://h2o.enr.state.nc.us/ncwetlands/strmgide.html.
Provide a brief description of the proposed mitigation plan. The description should
provide as much information as possible, 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 sheet if
more space is needed.
The proposed project should not be required to provide mitigation for the
proposed impacts. This is due the efforts of the developer's team to avoid
jurisdictional areas to the maximum extent possible Impacts to the streams
and wetlands are less than 150 linear feet and Y2 acre respectively. As
shown on the Site Plan, sufficient room is provided for homes and driveways
without encroachment into the buffer areas.
2. Mitigation may also be made by payment into the North Carolina Ecosystem
Enhancement Program (NCEEP). Please note it is the applicant's responsibility to
contact the NCEEP at [phone] to determine availability, and written approval
from the NCEEP indicating that they are will to accept payment for the mitigation
must be attached to this form. For additional information regarding the application
process for the NCEEP, check the NCEEP website at
Page 6 of 9
http://h2o.enr.state.nc.us/wrp/index.htm. If use of the NCEEP is proposed, please
check the appropriate box on page five and provide the following information:
Amount of stream mitigation requested (linear feet): 0
Amount of buffer mitigation requested (square feet): 0
Amount of Riparian wetland mitigation requested (acres): 0
Amount of Non-riparian wetland mitigation requested (acres): 0
Amount of Coastal wetland mitigation requested (acres): 0
IX. Environmental Documentation (required by DWQ)
1. Does the project involve an expenditure of public (federal/state/local) funds or the use
of public (federal/state) land? Yes ? No
2. 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 ?
3. 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 ?
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 213
.0233 (Neuse), 15A NCAC 2B .0259 (Tar-Pamlico), 15A NCAC 02B .0243
(Catawba) 15A NCAC 213 .0250 (Randleman Rules and Water Supply Buffer
Requirements), or other (please identify-)? Yes® No ?
2. If "yes", identify the square feet and acreage of impact to each zone of the riparian
buffers. If buffer mitigation is required calculate the required amount of mitigation
by applying the buffer multipliers.
Zone* Impact
(square feet) Multiplier Required
Mitigation
1 6,760 3 (2 for Catawba)
2 3,984 1.5
Total 10,862
Page 7 of 9
Buffer Impact Area Zone 1 Total (SF) Zone 1 Total (SF)
N Detention Pond 342 211
S Detention Pond 260 136
Detention Pond Totals 602 347
Black Maple Dr. 6,276 3,637
TOTALS(SF) 6,878 3,984
TOTALS (Acres) 0.16 0.09
3. If buffer mitigation is required, please discuss what type of mitigation is proposed
(i.e., Donation of Property, Riparian Buffer Restoration / Enhancement, or Payment
into the Riparian Buffer Restoration Fund). Please attach all appropriate information
as identified within 15A NCAC 2B .0242 or.0244, or.0260. Not Required.
XI. Stormwater (required by DWQ)
Describe impervious acreage (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. If percent impervious surface exceeds 20%, please provide calculations
demonstrating total proposed impervious level. Brandemere Subdivision has received
preliminarv stormwater approval from the City of Raleigh We are currently
awaiting the approval letter and will provide it to DWQ immediately upon
receiving.
Stormwater structures associated with the project, includinq diffuse, have been
provided in the attached information packet. These include bioretention
extended dry detention basins level spreaders and their associated bypass
devices. In addition to the plan details photographic records and signed
operation and maintenance agreements are included for the structures
While under construction, temporary, custom sedimentation basins will be
installed outside of the wetlands streams and riparian buffer areas to protect
them against sedimentation along with other appropriate sedimentation and
erosion control measures in compliance with City of Raleigh Wake County & NC
Sedimentation and Erosion Control requirements
XII. Sewage Disposal (required by DWQ)
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.
To the City of Raleigh Walnut Creek Waste Water Treatment Facility.
Page 8 of 9

XIII. Violations (required by DWQ)
Is this site in violation of DWQ Wetland Rules (15A NCAC 2H .0500) or any Buffer
Rules?
Yes ? No
Is this an after-the-fact permit application? Yes ? No
XIV. Cumulative Impacts (required by DWQ)
Will this project (based on past and reasonably anticipated future impacts) result in
additional development, which could impact nearby downstream water quality?
Yes ? No
If yes, please submit a qualitative or quantitative cumulative impact analysis in
accordance with the most recent North Carolina Division of Water Quality policy posted
on our website at http://h2o.enr.state.nc.us/ncwetlands. If no, please provide a short
narrative description:
Having reviewed the draft internal policy concerning cumulative impacts, this
subdivision is unlikely to damage downstream water quality and should not
require additional analysis.
XV. 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).
None
June 23, 2008
Applicant/Agent's Signature Date
(Agent's signature is valid only if an authorization letter from the applicant is provided.)
Page 9 of 9
. 4- warfiRpy
- T4" ay'? os - ID at L'F
NCDENR Y
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT
This form must be completely filled out, printed and submitted.
DO NOT FORGET TO ATTACH THE REQUIRED ITEMS CHECKLIST AND ALL REQUIRED ITEMS (NEXT WORKSHEET)I
Project name Brandamere
Contact name Ed Reeves
Phone number 919-782-5113
Date June 10, 2008
Drainage area number South DA
(I",!-,
Fp MAfION s_
For Level Spreaders Receiving Flow From a BMP
Type of BMP Extended Dry Detention Basin
Drawdown flow from the BMP 0.01 cfs
For Level Spreaders Receiving Flow from the Drainage Area Do not complete this section of the worksheet.
Drainage area ftz Do not complete this section of the worksheet.
Impervious surface area ftz Do not complete this section of the worksheet.
Percent impervious % Do not complete this section of the worksheet.
Rational C coefficient Do not complete this section of the worksheet.
Peak flow from the 1 in/hr storm cis Do not complete this section of the worksheet.
Time of concentration min
Rainfall intensity, 10-yr storm in/hr Do not complete this section of the worksheet.
Peak flow from the 10-yr storm cfs Do not complete this section of the worksheet.
Where Does the Level Spreader Discharge?
To a grassed bioretention cell? n (Y or N)
To a mulched bioretention cell? n (Y or N)
To a wetland? n (Y or N)
To a filter strip or riparian buffer? Y (Y or N) Please complete filter strip characterization below.
Other (specify)
Filter Strip or Riparian Buffer Characterization (if applicable)
Width of grass 0.00 ft
Width of dense ground cover 50.00 ft
Width of wooded vegetation 0.00 ft
Total width 50.00 ft
Elevation at downslope base of level lip 284.00 fmsl
Elevation at top of bank of the receiving water 280.00 fmsl
Slope (from level lip to to top of bank) 8.00 %
Are any draws present? n (Y or N) OK
Level Spreader Design
Forebay surface area na sq ft No forebay is needed.
Feet of level lip needed per cfs 13 ft/cfs
Answer "Y" to one of the following:
Length based on the 1 in/hr storm? n (Y or N)
Length based on the 10-yr storm? n (Y or N)
Length based on the BMP discharge rate? y (Y or N)
Design flow 0.01 cfs
Is a bypass device provided? Y (Y or N) OK
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Parts I. and It. Design Summary, page 1 of 2
24.00 ft t#VAWEI
Length of the level lip n - (Y or N)
Are level spreaders in series?
Bypass Channel Design (if applicable)
n (Y or N)
Does the bypass discharge through a wetland? Y or N)
Does the channel enter the stream at an angle? Y --- ( )
Dimensions of the channel (see diagram below): - 2 00 ft
M 3.00 ft
B - 7,00 ft
W 1.00 ft
y 1- 3,45 - cfs
Peak velocity in the channel during the 10-yr storm Class B Rip Rap
Channel lining material
1.
;
Y
1 i------------- M
M
B i
Parts I. and it. Design Summary, page 2 of 2
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5
I?I.TEGRATED DESIGN. PA
DRAINAGE DITCH DESIGN (VELOCITY CONSTRAINT)
PROJECT: BRANDEMERE - SOUTH BYPASS CHANNEL
DATE: 3-Apr-08
REV: 23-Jun-88
THIS PROGRAM IS DESIGNED TO DETERMINE WHAT SIZE RIPRAP WILL BE REQUIRED
IN A DITCH GIVEN LIMITATIONS OF HEIGHT AND BASE WIDTH OF DITCH. THIS
PROGRAM CAN ALSO CHECK VELOCITY OF THE DITCH. IF IT IS TO BE A GRASS
SWALE, VELOCITY CAN BE CHECKED BY ASSUMING 6" RIPRAP (BOTH HAVE N=0.03).
LINE CHANNEL WITH 6 " RIP-RAP (ASSUME 6 " EVEN IF USING GRASS)
LIMIT Y= 0.42 FT
LIMIT B= 3 FT

T=YDS WHERE: T=SHEAR FORCE (#/SQFT)
Y=WEIGHT OF WATER (62.4 #/CUFT)
D=DEPTH OF FLOW IN CHANNEL (FT)
S=SLOPE OF CHANNEL (FT/FT)
T= 3.3 #/SQFT
PERMISSABLE LINNINC G #/SQFT
JUTE NET 0.45
CURLED MAT 1.55
CLASS A(4"@9"THK) 2.00
CLASS B(8"@18"THK) 3.50
CLASS 1(12"@22"THK) 5.00
CLASS II(18"@30"THK) 7.50
. Y
61
1 SQUARE FEET
NEW A= .
88
4 WETTED PERIMETER
NEW P=
= .
0.33 77
HYDRAULIC RADIUS
ER THAN Z REQUIRED= 0
NEW R 77
0 MUST BE GREAT
ACTUAL=
Z .
40
8
fps
NEW V= . ----,,,777777777777777772
.3 #/SQFT
3.50 #/SQFT > 3
LINER: CLASS B WIDTH
----- ---------------
4.68
------------------- /
D
E.
. = 0.42 FT
T (Y) \
----------
---
H 3 FT
BASE (B)
a?oF warFROc
.A.*IA*
Ex? O $ ' ID q toot
NCDENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT
This form must be completely filled out, printed and submitted.
DO NOT FORGET TO ATTACH THE REQUIRED ITEMS CHECKLIST AND ALL REQUIRED ITEMS (NEXT WORKSHEET)I
Project name Brandamere r
Contact name Ed Reeves
Phone number 919-782-5113
Date June 10, 2008
Drainage area number North DA
IG DE51G 1 F0 ATION' !, _ ?; '=
For Level Spreaders Receiving Flow From a BMP
Type of BMP Extended Dry Detention Basin
Drawdown flow from the BMP 0.04 cfs
For Level Spreaders Receiving Flow from the Drainage Area Do not complete this section of the worksheet.
Drainage area fill Do not complete this section of the worksheet.
Impervious surface area ftz Do not complete this section of the worksheet.
Percent impervious % Do not complete this section of the worksheet.
Rational C coefficient Do not complete this section of the worksheet.
Peak flow from the 1 in/hr storm cfs Do not complete this section of the worksheet.
Time of concentration min
Rainfall intensity, 10-yr storm in/hr Do not complete this section of the worksheet.
Peak flow from the 10-yr storm cfs Do not complete this section of the worksheet.
Where Does the Level Spreader Discharge ?
To a grassed bioretention cell? n (Y or N)
To a mulched bioretention cell? n (Y or N)
To a wetland? n (Y or N)
To a filter strip or riparian buffer? y (Y or N) Please complete filter strip characterization below.
Other (specify)
Filter Strip or Riparian Buffer Characterization (if applicable)
Width of grass 0.00 ft
Width of dense ground cover 50.00 ft
Width of wooded vegetation 0.00 ft
Total width 50.00 ft
Elevation at downslope base of level lip 289.00 fmsl
Elevation at top of bank of the receiving water 286.00 fmsl
Slope (from level lip to to top of bank) 6.00 % OK
Are any draws present? n (Y or N) OK
Level Spreader Design
Forebay surface area na sq ft No forebay is needed.
Feet of level lip needed per cfs 13 ft/cfs
Answer "Y" to one of the following:
Length based on the 1 in/hr storm? n (Y or N)
Length based on the 10-yr storm? n (Y or N)
Length based on the BMP discharge rate? y (Y or N)
Design flow 0.04 cis
Is a bypass device provided? y (Y or N) OK
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Parts I. and II. Design Summary, page 1 of 2
40.00 ft #VAWE!
Length of thelevel lip (Y or N)
Are level spreaders in series?
Bypass Channel Design (if applicable) n (Y or N)
Does the bypass discharge through a wetland? - ---
Y (Y or N)
Does the channel enter the stream at an angle? -
Dimensions of the channel (see diagram below): 0 it
M
l3 6.00 ft
-

w 10.00 ft
1.00 ft
Peak velocity in the channel during the 10-yr storm
Class B Rip Rap
Channel lining material
,
1
Y
--------------?
t i-------------
M
M
B i
Parts I. and it. Design Summary, page 2 of 2
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5
INTEGRATED DESIGN* PA
DRAINAGE DITCH DESIGN (VELOCITY CONSTRAINT)
PROJECT: BRANDEMERE - NORTH BYPASS CHANNEL
DATE: 3-Apr-08
REV: 23-Jun-88
THIS PROGRAM IS DESIGNED TO DETERMINE WHAT SIZE RIPRAP WILL BE REQUIRED
IN A DITCH GIVEN LIMITATIONS OF HEIGHT AND BASE WIDTH OF DITCH. THIS
PROGRAM CAN ALSO CHECK VELOCITY OF THE DITCH. IF IT IS TO BE A GRASS
SWALE, VELOCITY CAN BE CHECKED BY ASSUMING 6" RIPRAP (BOTH HAVE N=0.03).
AREA (A)= (ACRES)
COEF (C)= 0.45 (DIMENSIONLESS)
INTE.(I)= 7.22 (IN/HR)
FLOW (Q)= 33.04 cfs (SEE HYDROGRAPH SUMMARY REPORT)
LINE CHANNEL WITH 6 " RIP-RAP (ASSUME 6 " EVEN IF USING GRASS)
MANNING= 0.030 (DIMENSIONLESS)
SLOPE= 0.080 (FT/FT)
Z REQUID= 2.35 RATIO
SIDE (M)= 2:1
€VANABI E QIIEANTITt .. , .......... .
LIMIT Y= 0.553 FT
LIMIT B= 6 FT
c?nu raraRCI S>~TIt8aIIJ?I>IRAI)UVAG'
T=YDS WHERE: T=SHEAR FORCE (#/SQFT)
Y=WEIGHT OF WATER (62.4 #/CUFT)
D=DEPTH OF FLOW IN CHANNEL (FT)
S=SLOPE OF CHANNEL (FT/FT)
T= 2.8 #/SQFT
PERMISSABLE LINNINC G #/SQFT
JUTE NET 0.45
CURLED MAT 1.55
CLASS A(4"@9"THK) 2.00
CLASS B(8"@18"THK) 3.50
CLASS 1(12"@22"THK) 5.00
CLASS 11(18"@30"THK) 7.50
NEW A= 3.93 SQUARE FEET
NEW P= 8.47 WETTED PERIMETER
NEW R= 0.46 HYDRAULIC RADIUS
MUST BE GREATER THAN Z REQUIRED=
Z ACTUAL= 2.35
NEW V= 8.42 fps
LINER: CLASS B
3.50 #/SQFT >
WIDTH
2.35
2.8 #/SQFT
8.212 ----- ---------------
D /
E
P 0.553 FT
T (Y) \
H 6 FT
BASE (B)