HomeMy WebLinkAbout20061955 Ver 3_401 Application_20080708r;. & ' /755 v3
Dennis Ray Blackmon, R.L.S.
Telephone 919-934-3490
Fax 919-934-1624
1023C W. Market Street
PO Box 1401
Smithfield, NC 27577
July 17, 2008
John Dorney
DWQ Wetlands/401 Unit
2321 Crabtree Blvd.
Suite 250
Raleigh, N.C. 27604
Subject: Greystone Crossing Phase 3
Pre-Construction Notification Application
Pleasant Grove Township, Johnston County
Dear Mr. Dorney,
Please find enclosed seven copies of the Pre-Construction Notification Application
package and a check in the amount of $240.00 for Greystone Crossing Phase 3 located on
SR 1309 approximately 3,0001f north from the intersection of SR 1309 and NC 210 and
directly across from SR 1544. This letter is to inform you of the Riparian Buffer Impact
caused by this development.
Please find attached an approval letter for the stormwater plan from Jamie Guerrero, PE
Stormwater Administrator for Johnston County.
Also, please find attached a letter from Soil Scientist Dan J. Bliley concerning the
involved wetlands.
If you have any questions or need any additional information, please give me a call at
919-934-3490.
Sincer y,
An rew W. Ho ge, P.E.
JUL 2 1 2008
DENR - %,*I eR QLJAU)?Y
WETLANDS AND STORMWATER BRANCH
191
DEPARTMENT OF PUBLIC UTILITIES
POST OFFICE BOX 2263
SMITHFIELD, N.C. 27577
(919) 989-5075
July 17, 2008
Mr. Mike Coates
Crossroads Development Corporation
12400 NC 50 North
Willow Springs, NC 27592
Re: Greystone Crossing Subdivision Phase III
Stormwater Management Statement and Plan
Dear Mr. Coates:
We have reviewed the Stormwater Management Plan and revised calculations submitted for the
Greystone Crossing Subdivision Phase III. Based upon the information submitted, the
stormwater management plan has been approved with the following stipulations:
1. Please be advised that the storm sewer system located within the proposed future public
right-of-way has not been reviewed. It is the developer's and design professional's
responsibility to ensure that the system is designed adequately.
2. Please provide a copy of the recorded restrictive covenants and a note on the Final Plat
limiting the impervious area to 4,507 square feet per lot.
3. Please provide a copy of the approval letter from NCDENR Land Quality for the
Sedimentation and Erosion Control Plan.
4. Prior to recordation of the Final Plat, please provide an 8.5"x11" driveway culvert size
chart sealed and signed by the engineer for all lots.
5. Please provide a copy of the recorded restrictive covenants noting who will be
responsible for maintenance of all drainage facilities located outside of the proposed
NCDOT right of way.
6. Prior to recordation of the Final Plat, please provide a stormwater certification stating that
all stormwater facilities were constructed in accordance with the approved stormwater
management plan.
7. Please indicate all drainage easements, riparian buffers, jurisdictional wetlands, and flood
hazard areas on the Final Plat.
A copy of this letter will be forwarded to the Planning Office for their files. If you have any
questions or need additional information, please contact me at (919) 209-8333 or by email at
jamie.guerrero a iohnstonnc.com.
Sincerely,
Jamie Guerrero, PE
Stormwater Administrator
cc: Chandra C. Coats, PE - Utilities and Environmental Engineer
Berry Gray - Planner
Andrew Hodge, PE - Dennis Ray Blackmon, RLS
Printed on recycled paper co
Office Use Only: Form Version March 08
USACE Action ID No. DWQ No.
kit any parncuiar item is not appucadje to this protect, please enter "Not Applicable" or "N/A".)
1. Processing
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 ? Express 401 Water Quality Certification
2. Nationwide, Regional or General Permit Number(s) Requested: 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 Carolina 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: -
II. Applicant Information
Owner/Applicant Information
,JUL 2 1 2008
Name: Mike Coates -Crossroads Development Co
Mailing Address: 12400 NC 50 North
Willow Springs NC 27592
Telephone Number: 989-9702 Fax Number: 989-9703
E-mail Address: mcoates120,nc.rr.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: _ Andrew W Hodge PE
Company Affiliation: Dennis Rav Blackmon. RLS
Mailing Address: PO Box 1401
Smithfield NC 27577
Telephone Number: 934-3490 Fax Number: 934-1624
E-mail Address: andrew@drbrls.com
Page 5 of 12
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 l l 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: GREYSTONE CROSSING PHASE 3
2. T.I.P. Project Number or State Project Number (NCDOT Only):
3. Property Identification Number (Tax PIN): 161400-87-2625
4. Location
County: Johnston Nearest Town: Benson
Subdivision name (include phase/lot number): Greystone Crossing Phase 3
Directions to site (include road numbers, landmarks, etc.): The property is located on the
west side of SR1309 (old fairgrounds rd) +/-3,150 If north of NC210 and directly across from
SRI 544 (enms road)
5. Site coordinates (Lat/Long or decimal degrees):35°31'47" Lat -78°36'05" Long
(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): +/- 71.4 ac - Phase 3
7. Name of nearest receiving body of water: Hooks Branch
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/admininiapsi.)
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 wooded. The property is zoned AR Presently
agricultural and residential uses in the vicinity.
Page 6 of 12
10. Describe the overall project in detail, including the type of equipment to be used: The
impact is due to residential subdivision road crossing. Equipment likely to be used will be
excavators, back hoes, pans, etc.
11. Explain the purpose of the proposed work: Construction of a Public road for the
development/improvement of the property.
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.Phase 2 of this project had a subdivision road crossing which resulted in a
stream, buffer and wetland impact The USACE Action # SAW-2007-105-251 application date
was 12/06/07, permit date was 01/12/07 The DWO Project # 06-1955 application date was
12/06/07, permit date was 04/02/07 The impacts were as follows: wetland 0 026ac stream
perennial - I I91f, buffer zone 1 - 5 796sf buffer zone 2 - 3,098 sf
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
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:. The road crossing is positioned
gp flow of the head of stream call to avoid a stream impact Althouszh there will be wetland
and buffer impacts due to the pipe installation and road fill
Page 7 of 12
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 stncmre and flnnrlinQ
Wetland Impact
Site Number
(indicate on map)
Type of Impact Type of Wetland
(e.g., forested, marsh,
herbaceous, bog, etc.) vLocated within
100-year
Floodplain
es/no) Distance to
Nearest
Stream
(linear feet) Area of
Impact
(acres)
1 fill Forested bottomland no +/-6,000 0.091
Total Wetland Impact (acres) 0.091
I List the total acreage (estimated) of all existing wetlands on the property:9.18 ac
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 ncreaue mnltinly lenoth X width than d;V;/la I%cr Al ' AAO
Stream Impact
Number
(indicate on ma)
Stream Name
Type of Impact Perennial or
Intermittent? Average
Stream Width
Before Impact Impact
Length
(linear feet) Area of
Impact
(acres)
N/A -
Total Stream Impact (by length and acreage)
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 drninnue hnilchPadQ atrr
Open Water Impact
Site Number
(indicate on ma) Name
(if applicable) Watee) v
Type of Impact Type of Waterbody
(lake, pond, estuary, sound, bay,
ocean, etc.) Area of
Impact
(acres)
N/A
Total Open Water Impact (acres)
Page 8 of 12
6. List the cumulative impact to all Waters of the U.S. resulting from the project:
Stream Impact (acres): N/A
Wetland Impact (acres): 0.091
Open Water Impact (acres): N/A
Total Impact to Waters of the U.S. (acres) 0.091
Total Stream Impact (linear feet): N/A
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 USAGE.
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.To avoid a stream impact the
road crossing is desianed to be upflow of the head of stream call To minimize wetland and
buffer impacts the crossing is designed to be nearly perpendicular to the feature Also headwalls
will be used to minimize the amount of fill and impact required to satisfy NCDOT Also a zone 2
buffer impact is required for the level spreader bypass channel
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.
Page 9 of 12
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.eiir.state.nc.us/ncwetlands,,sti-iiiL,Ide.html.
I. 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.
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
(919) 715-0476 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 http //112o.enr.state.nc.LIS"wrp/index htm. If use of the NCEEP is proposed, please
check the appropriate box on page three and provide the following information:
Amount of stream mitigation requested (linear feet):
Amount of buffer mitigation requested (square feet):
Amount of Riparian wetland mitigation requested (acres):
Amount of Non-riparian wetland mitigation requested (acres):
Amount of Coastal wetland mitigation requested (acres):
Page 10 of 12
IX.
X.
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 (919) 733-5083 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 ?
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.
1. Will the project impact protected riparian buffers identified within 15A NCAC 2B .0233
(Meuse), 15A NCAC 2B .0259 (Tar-Pamlico), 15A NCAC 02B .0243 (Catawba) 15A NCAC
2B .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 Multiplier Required
(square feet) Mitigation
1 7,348 3 (2 for Catawba)
2 4,120 1.5
Total 11,468
* Zone 1 extends out 30 feet perpendicular from the top of the near bank of channel; Zone 2 extends an
additional 20 feet from the edge of Zone 1.
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.
Page l 1 of 12
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. This property is undeveloped, therefore there are
virtually no existing- impervious surfaces. The only impervious surfaces proposed are the 20'
road section, driveways and roof tops. The proposed impervious surface will be less than or
eqqual to 15% of the total property in accordance with Johnston County stormwater ordinance. At
the areas where disturbed surface waters leave the project, it will first pass through an
appropriately sized sediment trap and areas where riparian buffers are immediately downstream
level spreaders will provide diffused flow, with all measures remaining outside the buffers.
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.
Lots will be served by individual septic tanks
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/ncwetiands. If no, please provide a short narrative description:This
phase carries the project out to the state road No other impacts are expected
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).
A l'cant/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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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 INFORMATION
Project name GREYSTONE CROSSING PHASE 3
Contact name ANDREW HODGE
Phone number 934-3490
Date May 19, 2008
Drainage area number 1
II. DESIGN INFORMATION
For Level Spreaders Receiving Flow From a BMP
Type of BMP
Drawdown flow from the BMP cfs
For Level Spreaders Receiving Flow from the Drainage Area
Drainage area 78,844.00 ft2
Impervious surface area 11,827.00 ft
Percent impervious 15.00 %
Rational C coefficient 0.31
Peak flow from the 1 in/hr storm 0.56 cfs
Time of concentration 10.00 min
Rainfall intensity, 1 0-yr storm 6,21 in/hr
Peak flow from the 10-yr storm 3.48 cfs
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? Y (Y or N) Please complete fitter strip characterization below
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 ft
Width of dense ground cover 35.00 ft
Width of wooded vegetation 25.00 ft
Total width 60.00 ft
Elevation at downslope base of level lip 253.83 fmsl
Elevation at top of bank of the receiving water 250.85 fmsl
Slope (from level lip to to top of bank) 4.97 % OK
Are any draws present? N (Y or N) OK
Level Spreader Design
Forebay surface area 23.80 sq ft OK
Feet of level lip needed per cis 35 ft/cfs
Answer "Y" to one of the following:
Length based on the 1 in/hr storm? Y (Y or N)
Length based on the 10-yr storm? N (Y or N)
Length based on the BMP discharge rate? N (Y or N)
Design flow 0.56 cis
Is a bypass device provided? Y (Y or N) OK
Form SW401-Level Spreader, Fitter Strip, Restored Riparian Buffer-Rev.5 Parts L and n. Design Summary, page 1 of 2
Length of the level lip
Are level spreaders in series?
Bypass Channel Design (if applicable)
Does the bypass discharge through a wetland?
Does the channel enter the stream at an angle?
Dimensions of the channel (see diagram below):
M
B
W
y
Peak velocity in the channel during the 10-yr storm
Channel lining material
29.00 it Level spreader length OK.
N (Y or N)
Y (Y or N) Redesign channel to discharge to a dissipator pad adjacent to the wetland.
Y (Y or N)
3.00 ft
4.73 it
0.29 ft
3.48 cfs
RIPRAP
-----------
M
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5
--? 1
M
Parts I. and II. Design Summary, page 2 of 2
DWQ Project No.
DIVISION OF WATER QUALITY - LEVEL SPREADER WORKSHEET (1/2007)
1. PROJECT INFORMATION (please omplete the following information):
Project Name : -e -S „ C -,, s, -3C-
Contact Person: Phone Number: j
Level Spreader ID:
Level Spreader Length Z 1 ft.
Drainage Area / - k l ac.
Impervious Area y , 7- -7 ac.
Forebay Area _ 13. Y' s?
Maximum Filter Strip/Buffer Slope _?< y 7 %
grass
(perpendicular to flow)
(on-site and off-site drainage to the level spreader)
(on-site and off-site drainage to the level spreader)
(0.2% of the contributing impervious surface area)
(6% for forested, leaf littler cover, 8% for thick ground cover
Max. Discharge from 1'/Hr Storm O - s cfs
Max. Discharge to Level Spreader O . s' Cv cfs . C--,-,
Filter Strip/ Zone 2 Buffer Vegetation -4.- f Ohick ground cover or grass; canopied forest with leaf litter
groundcover)
^ 1
Pre-treatment or Bypass Method Used _ ?,. -/'e 2 r?'_ -c b-1,
II. REQUIRED ITEMS CHECKLIST
Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a
requirement has not been 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.
Applica s Initials
u Project Site was visited prior to designing level spreader.
Date of the Site visit. PLEASE ATTACH TIME-DATED DIGITAL PHOTO OF EXISTING BUFFER CONDITIONS.
Level spreader is at least 13 ft. per cfs for thick ground cover or grass or 65 ft per cfs in canopied forest with leaf
litter for 50-foot buffer; 50 ft per cfs for 100-foot buffer, or 40 ft. per cfs for 150-foot buffer.
.f/!Z Pre-Formed Scour Holes are on flat slopes only.
1.?rcrW No structures are located in protected buffers (must meet no practical alternatives criteria).
Design Alternative (if any) and Bypass method used:
Bypass conveyance method is specified and plan details and calculations are provided.
Alternative design option is specified and plan details and calculations are provided.
Discharge to level spreader and subsequent filter strip is hydraulically and spatially separate from the bypass
discharge.
No structures are located in protected buffers. a.-ety'
14e&W Plan details for the bypass and outlets are provided.
_? W The operation and maintenance agreement includes annual erosion and vegetation repair.
1-rf'4-, rf The operation and maintenance agreement signed and notarized by the responsible party is provided.
LEVEL SPREADER OPERATION AND MAINTENANCE AGREEMENT
For STREAM CROSSING
Maintenance activities shall be performed as follows:
1. Inspect level spreaders after every rainfall until vegetation is established, and make prompt repairs.
2. After the area has been stabilized, make inspections every six months. Remove accumulated sediment
and debris, and maintain vegetation in a healthy, vigorous condition. Verify that the level spreaders are
distributing flow evenly. If problems are noted, make appropriate modifications to ensure even flow
distribution. Any down gradient erosion must be repaired and/or replanted as necessary.
I acknowledge and agree by my signature below that I am responsible for the performance of the two
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: Mike Coates - Crossroads Development Corp
Title: Co-Owner
Address: 12400 NC 50 North, Willow Springs, NC 27592
Signature: yuZA-?? l L ( ?
Date: 0& - -?3- zoo Z
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. /??
I, RI40t. 5, ?"I Zrrld4pn 'a Notary Public for the State of l ?(OR.T4-1 0-PR OAN9,
County of jDktn.4on , do hereby certify that M t ce_Hae) O-o&+es
personally appeared before me this a 3lt' day of J t t,n e , Poog , and acknowledge the due
execution of the forgoing level spreader maintenance requirements. Witness my hand and official seal,
\\\???P ?S ?E L L?
O?
PUBLIC
O
SEAL
My commission expires_
Page 1 of 1
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LEVEL SPREADER BYPASS CHANNEL
Worksheet for Trapezoidal Channel
Project Description
Project File c:\program files\haestad\fmw\greystn3.fm2
Worksheet LEVEL SPREADER BYPASS CHANNEL
Flow Element Trapezoidal Channel
Method Manning's Formula
Solve For Channel Depth
Input Data
Mannings Coefficient 0.040 ---- e o --
Channel Slope 4.9700 %
Left Side Slope 3.000000 H : V
Right Side Slope 3.000000 H : V
Bottom Width 3.00 ft
Discharge 3.48 cfs
Results
Depth 0.29 ft
Flow Area 1.12 ftz
Wetted Perimeter 4.83 ft
Top Width 4.73 ft
Critical Depth 0.31 ft
Critical Slope 0.037966 ft/ft
Velocity 3.12 ft/s
Velocity Head 0.15 ft
Specific Energy 0.44 ft
Froude Number 1.13
Flow is supercritical.
06/10/08
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Data: Drainage Area . 71.1 * Acres
Runoff curve Number . 59 *
Time of concentration: 1.30 * Hours
Rainfall Type II
Pond and swamp Area NONE
i Storm Number
I
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( 3 I
Frequency (yrs) i -----
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25
i 100
24-Hr Rainfall (in) 5.8 i 6.7 ( 8.4
Ia/P Ratio ( 0.24 i 0.21 ' 0.17
Runoff (in) i 1.71 i 2.30 i 3.52
i unit Peak Discharge 1 0.412 1 0.426 1 0.445
(cfs/acre/in)
I Pond and Swamp Factorl 1.00 l 1.00 ( 1.00
( 0.0% Ponds used I
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l 70
j 111
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UPSTREAM OF ROAD CROSSING
Worksheet for Irregular Channel
Project Description
Project File c:lprogram files\haestadlfmwlgreystn3.fm2
Worksheet ROAD CROSSING-UP STREAM
Flow Element Irregular Channel
Method Manning's Formula
Solve For Discharge
Input Data
Channel Slope 0.8000%
Water Surface Elevation 257.61 ft
Elevation range: 256.78 ft to 261.83 ft.
Station (ft) Elevation (ft) Start Station
0.00 261.47 0.00
35.78 258.21
42.72 257.54
46.39 256.78
50.40 257.61
134.55 258.51
149.39 261.83
Results
Md. Mannings Coefficient 0.080
Discharge 2,96 cfs
Flow Area 3,34 ft2
Wetted Perimeter 8.57 ft
Top Width 8.41 ft
Height 0.83 ft
Critical Depth 257.25 ft
Critical Slope 0.15521 0 ft/ft
Velocity 0.89 ft/s
Velocity Head 0.01 ft
Specific Energy 257.62 ft
Froude Number 0.25
Flow is subcritical.
End Station
149.39
Roughness
0.080
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26
Routine Wetland Determination
DATA FORM 1 (Revised)
IAIA c+..+e ,AI-+! A r%Minao+inn Manual nr 94R7 Cnms wetland Delineation Manual)
Project/Site: Greystone Crossing Subdivision Section III Date: June 18, 2008
Applicant/owner: Crossroads Development Co. County: Johnston
Investigator(s): Daniel J. Bliley State: NC
S/T/R.
Do normal circumstances exist on the site? X Yes ? No Community ID:
Is the site significantly disturbed (atypical situation)? ? Yes X No Transect ID:
Is the area a potential problem area? ? Yes X No Plot ID:
Explanation of atypical or problem area:
VEGETATION
Dominant Plant Species *Stratum Indicator Dominant Plant Species *Stratum Indicator
Prunus Serotinia can FACU Quercus Nigra can FAC
Acre Rubrum can FAC Pinus Taeda and FACW
Comus Florida and FACU Ilex Opaca can FAC
Liquidambar Stracifula can FAC Sassafras Albidum and FACU
Nyssa Silvatica and FAC Vaccinium Combosum and FACW
Carya Cordiformis can FAC Pterdium Aquilinum and FACU
HYDROPHYTIC VEGETATION INDICATORS:
% of dominants OBL, FACW, & FAC: 90
Check all indicators that apply and explain below:
Visual observation of plant species growing in ? Physiological/reproductive adaptations
areas of prolonged inundation/saturation ? Wetland plant database
Morphological adaptations ? Personal knowledge of regional plant communities
? Technical Literature ? Other (explain)
Hydrophytic vegetation present? Yes X No
Rationale for decision/Remarks:
HYDROLOGY
Is it the growing season? Yes X No Water Marks: Yes X No Sediment Deposits: ? Yes ? No
on
Based on: ? Soil temp (record temp) Drift Lines: yes X No Drainage Patterns: Yes X No
? Other (explain)
Depth of inundation: 0 inches Oxidized Root (live roots) Local Soil Survey: Yes X No
Channels <12in.: Yes XNo
Depth to free water in pit: +24 inches FAC Neutral: ? Yes ? No Water-stained Leaves:
Yes X No
Depth to saturated soil: +24 inches
Check all that apply & explain below: Other (explain):
? Stream, lake or gage data
X Aerial photographs
? Other
Wetland hydrology present? Yes X No
Rationale for decision/remarks:
UPLAND SITE
SOILS ?
Map Unit Name (Series and Phase) : Gilead Sandy Loam
Drainage Class - Moderately Well
Field observations confirm mapped type? X Yes ? No
Taxonomy (subgroup) Acquic Hapludult
Profile Description
Depth Matrix color Mottle colors Mottle Abundance/ Texture, concretions,
(inches) Horizon Munsell moist) Munsell moist) Contrast structure, etc.
0-8 Ap 10YR 4/2 Sandy Loam
8-12 E 10YR 6/4 Sandy Loam
12-18 Bt 10YR 5/6 Sandy Clay Loam
18-36 Bt 10Y 5/6 10YR 7/2 C2d Clay Loam
36-60 BC 10Y5/6 10YR 6/4 C3d Sandy Clay Loam
Hydric Soil Indicators: (check all that apply) ? Matrix chroma 5 2 with mottles
? Histosol ? Mg or Fe ConcretionsX
? Histic Epipedon High Organic Content in Surface Layer of Sandy Soils
? Sulfidic Odor ? Organic Streaking in Sandy Soils
Aquic Moisture Regime Listed on National/Local Hydric Soils List
Reducing Conditions ? Other (explain in remarks)
Gleyed or Low-Chroma Colors
Remarks:
UPLAND SOIL
Wetland Determination
Hydrophytic vegetation present? Yes X No
Hydric soils present? Yes X No
Wetland hydrology present? Yes X No
Is the sampling point within a wetland? Yes X No
Remarks:
NOTES:
Routine Wetland Determination
DATA FORM 1 (Revised)
%ARA 0-4-4. W-61-4 n-l;n, ?+inn Mnnnni nr IQA7 Cnrns wetland Delineation Manual)
..pq vILCA& ..`?....... - - - - - - - -
Project/Site: Greystone Crossing Section III
Date: June 18, , 2008
Applicant/owner: Crossroads Development Co. County: Johnston
Investigator(s): Daniel J. Bliley State: NC
S/T/R.
Do normal circumstances exist on the site? X Yes ? No Community ID:
Is the site significantly disturbed (atypical situation)? ? Yes X No Transect ID:
Is the area a potential problem area? ? Yes X No Plot ID:
Explanation of atypical or problem area:
VEGETATION
Dominant Plant Species *Stratum Indicator Dominant Plant Species *Stratum Indicator
Nyssa Silvatica can OBL Clethra Aliniafolia and FACW
Acre Rubrum can FAC Vaccinium Combosum and FACW
Quercus Phellos can FACW Ilex Opaca and FAC
Betula Nigra can FACW Smilax Laurifolia and FACW
Persea Barbonia and FACW Arundinaria Gigantea and FACW
Sambucus Canadensis and FACW Osmunda Cinnamomea and FACW
HYDROPHYTIC VEGETATION INDICATORS:
% of dominants OBL, FACW, & FAC: 90
Check ail indicators that apply and explain below:
X Visual observation of plant species growing i n ? Physiological/reproductive adaptations
areas of prolonged inundation/saturation ? Wetland plant database
X Morphological adaptations ? Personal knowledge of regional plant communities
? Technical Literature ? Other (explain)
Hydrophytic vegetation present? X Yes ? No
Rationale for decision/Remarks:
HYDROLOGY
Is it the growing season? X Yes ? No Water Marks: X Yes ? No Sediment Deposits: ? Yes ? No
on
Based on: ? Soil temp (record temp) Drift Lines: X Yes ? No Drainage Patterns: X Yes ? No
? Other (explain)
Depth of inundation: 0 inches Oxidized Root (live roots) Local Soil Survey: X Yes ? No
Channels <12 in.: XYes ? No
Depth to free water in pit: 6 inches FAC Neutral: ? Yes ? No Water-stained Leaves:
X Yes ? No
Depth to saturated soil: 2 inches
Check all that apply & explain below: Other (explain):
? Stream, lake or gage data
X Aerial photographs
? Other
Wetland hydrology present? X Yes ? No
Rationale for decision/remarks:
SOII S
Map Unit Name (Series and Phase) : Bibb Sandy Loam
Taxonomy (subgroup) Typic Fluvaquent
Profile Description
Depth Matrix color
(inches) Horizon (Munsell moist)
0-8 A 10YR 2/2
8-12 E 10YR7/2
12-24 B 10YR 7/2
24-48 BC 10YR8/1
48-60 C 10YR7/1
Hydric Soil Indicators: (check all that apply
Histosol
? Histic Epipedon
F-1 Sulfdic Odor
X Aquic Moisture Regime
X Reducing Conditions
X Gleyed or Low-Chroma Colors
Remarks:
Wetland Determination
Drainage Class poorly
Field observations confirm mapped type? X Yes E] No
Mottle colors Mottle Abundance/ Texture, concretions,
(Munsell moist) Contrast structure, etc.
Sandy Loam
Sandy Loam
10YR 6/6 csd Sandy Loam
10YR6/4 C2d Sandy Clay Loam
10YR 6/4 C3d Sandy Clay Loam
) X? Matrix chroma 5 2 with mottles
? Mg or Fe ConcretionsX
X High Organic Content in Surface Layer of Sandy Soils
? Organic Streaking in Sandy Soils
X Listed on National/Local Hydric Soils List
? Other (explain in remarks)
Hydrophytic vegetation present? X Yes ? No
Hydric soils present? X Yes ? No
Wetland hydrology present? X Yes ? No
Is the sampling point within a wetland? X Yes ? No
Remarks:
NOTES: