20041488 Ver 5_401 Application_20090210

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Transmittal C)4 -- I ?g
STEWART-PROCTOR PLLC
ENGINEERING & SURVEYING
319 CHAPANOKE ROAD
SUITE 106
RALEIGH, NC 27603
PHONE: [phone]
FAX- [phone]
Date: 2?? O 9
Attention: AA)A),577L L v_tA S
From: Joh,) Try t,
No. of pages:
(Including this cover)
Comment(s):
i
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EB 1 0 2009
WETLANDS AND STORE EIR BRANCh1

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Reply requested: _ Yes _ No
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Corps action ID no.
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WETLANDS ANDSTORmwATERBRANCH DWQ project no. Y S
Form Version 1.3 Dec 10 2008
Pre-Construction Notification (PCN) Form
A. Applicant Information
1. Processing
1 a. Type(s) of approval sought from the
Corps:
®Section 404 Permit ? Section 10 Permit
1 b. Specify Nationwide Permit (NWP) number: or General Permit (GP) number: Nationwide 29
1 c. Has the NWP or GP number been verified by the Corps? ? Yes ? No
1d. Type(s) of approval sought from the DWQ (check all that apply):
® 401 Water Quality Certification - Regular ? Non-404 Jurisdictional General Permit
? 401 Water Quality Certification - Express X Riparian Buffer Authorization
1 e. Is this notification solely for the record
because written approval is not required? For the record only for DWQ 401
Certification:
? Yes ® No For the record only for Corps Permit:

? Yes N No
1f. Is payment into a mitigation bank or in-lieu fee program proposed for mitigation
of impacts? If so, attach the acceptance letter from mitigation bank or in-lieu
fee program. ? Yes ® No
1 g. Is the project located in any of NC's twenty coastal counties. If yes, answer 1 h
below. ? Yes ® No
1 h. Is the project located within a NC DCM Area of Environmental Concern (AEC)? ? Yes ® No
2. Project Information
2a. Name of project: Winston Pointe
2b. County: Johnston
2c. Nearest municipality / town: Town of Clayton
2d. Subdivision name: Winston Pointe
2e. NCDOT only, T.I.P. or state
project no: N/A
3. Owner Information
3a. Name(s) on Recorded Deed: Stephens Center
3b. Deed Book and Page No. D.B.2752 PG.766 D.B.2280 PG.22
3c. Responsible Party (for LLC if
applicable): Algie Stephens
3d. Street address: 319 Chapanoke Road
3e. City, state, zip: Raleigh, NC, 27603
3f. Telephone no.: 919-779-1855
3g. Fax no.: 919-779-1661
3h. Email address:
Page 1 of 10
PCN Form - Version 1.3 December 10, 2008 Version
4. Applicant Information (if different from owner)
4a. Applicant is: ? Agent ? Other, specify:
4b. Name:
4c. Business name
(if applicable):
4d. Street address:
4e. City, state, zip:
4f. Telephone no.:
4g. Fax no.:
4h. Email address:
5. Agent/Consultant Information (if applicable)
5a. Name: John Teel
5b. Business name
(if applicable): Stewart-Proctor Engineering
5c. Street address: 319 Chapanoke Road
5d. City, state, zip: Raleigh, NC, 27603
5e. Telephone no.: 919-779-1855
5f. Fax no.: 919-779-1661
5g. Email address: [e-mail]
Page 2 of 10
B. Project Information and Prior Project History
1. Property Identification
1a. Property identification no. (tax PIN or parcel ID): 1648-07-3913
1 b. Site coordinates (in decimal degrees): Latitude: 35.6425 Longitude: - 78.5125
(DD.DDDDDD) (-DD.DDDDDD)
1c. Property size: 833.72 acres
2. Surface Waters
2a. Name of nearest body of water (stream, river, etc.) to White Oak Creek
proposed project:
2b. Water Quality Classification of nearest receiving water: QNSW
2c. River basin: Neuse
3. Project Description
3a. Describe the existing conditions on the site and the general land use in the vicinity of the project at the time of this
application:
Land is wooded and fallow with existing subdivision to the north.
3b. List the total estimated acreage of all existing wetlands on the property:
115.25 ac.
3c. List the total estimated linear feet of all existing streams (intermittent and perennial) on the property:
1270 If intermittent and 4180 If perennial.
3d. Explain the purpose of the proposed project:
Provide secondary outlet for large multifamily project
3e. Describe the overall project in detail, including the type of equipment to be used:
Provide secondary outlet. Type of equipment to include bull dozer, grading pan and track hoe.
4. Jurisdictional Determinations
4a. Have jurisdictional wetland or stream determinations by the
Corps or State been requested or obtained for this property / Yes No Unknown
? ?
project (including all prior phases) in the past?
Comments: NBRRO 05-337 (included)
4b. If the Corps made the jurisdictional determination, what type
? Preliminary ? Final
of determination was made?
4c. If yes, who delineated the jurisdictional areas? Agency/Consultant Company:
Name (if known): Other:.5 4 EC
4d. If yes, list the dates of the Corps jurisdictional determinations or State determinations and attach documentation.
uX To 11J94 8EfGRf_ LHA1*j J6 TO 09FU) 000M
5. Project History
5a. Have permits or certifications been requested or obtained for ® Yes ? No ? Unknown
this project (including all prior phases) in the past?
5b. If yes, explain in detail according to "help file" instructions.
Due to USACE we revised roadway to not exceed the 300 If of impact. DWQ Project#04-1488
6. Future Project Plans
6a. Is this a phased project? X Yes ? No
6b. If yes, explain.
First phase will be the road and open space with additional multifamily and mix use projects coming on line in the future.
This will be determined by the market.
Page 3 of 10
PCN Form - Version 1.3 December 10, 2008 Version
C. Proposed Impacts Inventory
1. Impacts Summary
la. Which sections were completed below for your project (check all that apply):
® Wetlands Streams - tributaries ($? Buffers
? Open Waters Pond Construction
2. Wetland Impacts
If there are wetland impacts proposed on the site, then complete this question for each wetland area impacted.
2a. 2b. 2c. 2d. 2e. 2f.
Wetland impact Type of jurisdiction
number - Type of impact Type of wetland Forested (Corps - 404, 10 Area of impact
Permanent (P) or (if known) DWQ - non-404, other) (acres)
Temporary
W1 N P ? T Pipe/Fill Forested ® Yes
? No ® Corps
? DWQ 02
W2 ? P ? T ? Yes ? Corps
? No ? DWQ
W3 ? P ? T ? Yes ? Corps
? No ? DWQ
W4 ? P ? T ? Yes ? Corps
? No ? DWQ
W5 ? P ? T ? Yes ? Corps
? No ? DWQ
W6 ? P ? T ? Yes ? Corps
? No ? DWQ
2g. Total wetland impacts .02
2h. Comments:
3. Stream Impacts
If there are perennial or intermittent stream impacts (including temporary impacts) proposed on the site, then complete this
question for all stream sites impacted.
3a. 3b. 3c. 3d. 3e. 3f. 3g.
Stream impact Type of impact Stream name Perennial Type of jurisdiction Average Impact
number - (PER) or (Corps - 404, 10 stream length
Permanent (P) or intermittent DWQ - non-404, width (linear
Temporary (T) (INT)? other) (feet) feet)
S1 ®P ? T Pipe/Fill Ut to White Oak
Creek ? PER
M INT ? Corps
® DWQ 3.5' 80
S2 ? P ? T ? PER ? Corps
? INT ? DWQ
S3 ? P ? T ? PER ? Corps
? INT ? DWQ
S4 ? P ? T ? PER ? Corps
? INT ? DWQ
S5 ? P ? T ? PER ? Corps
? INT ? DWQ
S6 ? P ? T ? PER ? Corps
? INT ? DWQ
3h. Total stream and tributary Impacts 80
3i. Comments:
Page 4 of 10
PCN Form - Version 1.3 December 10, 2008 Version
4. Open Water Impacts
If there are proposed impacts to lakes, ponds, estuaries, tributaries, sounds, the Atlantic Ocean, or any other open water of
the U.S. then individual) list all open water impacts below.
4a. 4b. 4c. 4d. 4e.
Open water Name of waterbody
impact number - (if applicable) Type of impact Waterbody type Area of impact (acres)
Permanent (P) or
Temporary
01 ?P?T
02 ?P?T
03 ?P?T
04 ?P?T
4f. Total open water impacts
4g. Comments:
5. Pond or Lake Construction
If and or lake construction proposed, then complete the chart below.
5a. 5b. 5c. 5d. 5e.
Wetland Impacts (acres) Stream Impacts (feet) Upland
Pond ID Proposed use or purpose (acres)
number of pond
Flooded
Filled
Excavated
Flooded
Filled
Excavated
Flooded
P1 Detention Device
P2
5f. Total
5g. Comments: Detention pond to have no wetland and stream impact.
5h. Is a dam high hazard permit required?
? Yes No If yes, permit ID no:
5i. Expected pond surface area (acres): 0.95 ac
5j. Size of pond watershed (acres): 21.7 ac
5k. Method of construction: Excavation and installation of draw down valve with spillway.
6. Buffer Impacts (for DWQ)
If project will impact a protected riparian buffer, then complete the chart below. If yes, then individually list all buffer impacts
below. If an impacts require mitigation, then you MUST fill out Section D of this form.
6a.
® Neuse ? Tar-Pamlico ? Other:
Project is in which protected basin? ? Catawba ? Randleman
6b. 6c. 6d. 6e. 6f. 6g.
Buffer impact
number - Reason Buffer Zone 1 impact Zone 2 impact
Permanent (P) or for Stream name mitigation (square feet) (square feet)
Temporary T impact required?
61 I$ P ? T Pipe/Fill
for road Ut to White Oak Creek ® Nos 3701 sf 2380 sf
B2 ?P?T ?Yes
? No
B3 ?P?T ?Yes
? No
6h. Total buffer impacts 6081 sf
6i. Comments:
Page 5 of 10
D. Impact Justification and Mitigation
1. Avoidance and Minimization
1 a. Specifically describe measures taken to avoid or minimize the proposed impacts in designing project.
Previously approved with 3 crossings. Revised plans showing one intermittent crossing. Creeks traversed across project
and crossing was required by NCDOT. To minimize crossing are set at a 90 degree angle.
1 b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques.
Basins and silt fence to be installed first before grading and construction of road begins.
2. Compensatory Mitigation for Impacts to Waters of the U.S. or Waters of the State
2a. Does the project require Compensatory Mitigation for
impacts to Waters of the U.S. or Waters of the State? ? Yes No
2b. If yes, mitigation is required by (check all that apply): ? DWQ ? Corps

2c. If yes, which mitigation option will be used for this
project? ? Mitigation bank

El Payment to in-lieu fee program
? Permittee Responsible Mitigation
3. Complete if Using a Mitigation Bank
3a. Name of Mitigation Bank:
3b. Credits Purchased (attach receipt and letter) Type Quantity
3c. Comments:
4. Complete if Making a Payment to In-lieu Fee Program
4a. Approval letter from in-lieu fee program is attached. ? Yes
4b. Stream mitigation requested: linear feet
4c. If using stream mitigation, stream temperature: ? warm ? cool ?cold
4d. Buffer mitigation requested (DWQ only): square feet
4e. Riparian wetland mitigation requested: acres
4f. Non-riparian wetland mitigation requested: acres
4g. Coastal (tidal) wetland mitigation requested: acres
4h. Comments:
5. Complete if Using a Permittee Responsible Mitigation Plan
5a. If using a permittee responsible mitigation plan, provide a description of the proposed mitigation plan.
Page 6 of 10
PCN Form - Version 1.3 December 10, 2008 Version
6. Buffer Mitigation (State Regulated Riparian Buffer Rules) - required by DWQ
6a. Will the project result in an impact within a protected riparian buffer that requires
buffer mitigation? ? Yes ? No
6b. If yes, then identify the square feet of impact to each zone of the riparian buffer that requires mitigation. Calculate the
amount of mitigation required.

Zone 6c.
Reason for impact 6d.
Total impact
(square feet)
Multiplier 6e.
Required mitigation
(square feet)
Zone 1 3 (2 for Catawba)
Zone 2 1.5
6f. Total buffer mitigation required:
6g. If buffer mitigation is required, discuss what type of mitigation is proposed (e.g., payment to private mitigation bank,
permittee responsible riparian buffer restoration, payment into an approved in-lieu fee fund).
6h. Comments:
Page 7 of 10
E. Stormwater Management and Diffuse Flow Plan (required by DWQ)
1. Diffuse Flow Plan
1 a. Does the project include or is it adjacent to protected riparian buffers identified ® Yes ? No
within one of the NC Riparian Buffer Protection Rules?
1 b. If yes, then is a diffuse flow plan included? If no, explain why.
Yes ? No
Comments:
2. Stormwater Management Plan
2a. What is the overall percent imperviousness of this project? 24.0%
2b. Does this project require a Stormwater Management Plan? ® Yes ? No
2c. If this project DOES NOT require a Stormwater Management Plan, explain why:
2d. If this project DOES require a Stormwater Management Plan, then provide a brief, narrative description of the plan:
Proposed detention pond designed for proposed roadway and future construction.
? Certified Local Government
2e. Who will be responsible for the review of the Stormwater Management Plan? ® DWQ Stormwater Program
? DWQ 401 Unit
3. Certified Local Government Stormwater Review
3a. In which local government's jurisdiction is this project? Johnston
? Phase II
3b. Which of the following locally-implemented stormwater management programs ? NSW
? USMP
apply (check all that apply): ? Water Supply Watershed
? Other:
3c. Has the approved Stormwater Management Plan with proof of approval been ? Yes ? No
attached?
4. DWQ Stormwater Program Review
? Coastal counties
? HQW
4a. Which of the following state-implemented stormwater management programs apply ? ORW
(check all that apply):
? Session Law 2006-246
? Other:
4b. Has the approved Stormwater Management Plan with proof of approval been
attached? ? Yes ? No
5. DWQ 401 Unit Stormwater Review
5a. Does the Stormwater Management Plan meet the appropriate requirements? Yes ? No
5b. Have all of the 401 Unit submittal requirements been met? ;4 Yes ? No
Page 8 of 10
PCN Form -Version 1.3 December 10, 2008 Version
F. Supplementary Information
1. Environmental Documentation (DWQ Requirement)
1 a. Does the project involve an expenditure of public (federal/state/local) funds or the El Yes 10 No
use of public (federal/state) land?
1 b. If you answered "yes" to the above, does the project require preparation of an
environmental document pursuant to the requirements of the National or State ? Yes ® No
(North Carolina) Environmental Policy Act (NEPA/SEPA)?
1c. If you answered "yes" to the above, has the document review been finalized by the
State Clearing House? (If so, attach a copy of the NEPA or SEPA final approval
? Yes ® No
letter.)
Comments:
2. Violations (DWQ Requirement)
2a. Is the site in violation of DWQ Wetland Rules (15A NCAC 2H .0500), Isolated
Wetland Rules (15A NCAC 2H .1300), DWQ Surface Water or Wetland Standards, ? Yes ® No
or Riparian Buffer Rules (15A NCAC 2B.0200)?
2b. Is this an after-the-fact permit application? ? Yes ® No
2c. If you answered "yes" to one or both of the above questions, provide an explanation of the violation(s):
3. Cumulative Impacts (DWQ Requirement)
3a. Will this project (based on past and reasonably anticipated future impacts) result in Yes ? No
additional development, which could impact nearby downstream water quality?
3b. If you answered "yes" to the above, submit a qualitative or quantitative cumulative impact analysis in accordance with the
most recent DWQ policy. If you answered "no," provide a short narrative description.
4. Sewage Disposal (DWQ Requirement)
4a. 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.
Town of Clayton sewer system
Page 9 of 10
PCN Form - Version 1.3 December 10, 2008 Version
5. Endangered Species and Designated Critical Habitat (Corps Requirement)
5a. Will this project occur in or near an area with federally protected species or ? Yes No
habitat?
5b. Have you checked with the USFWS concerning Endangered Species Act ? Yes I$1 No
impacts?
F1 Raleigh
5c. If yes, indicate the USFWS Field Office you have contacted. ? Asheville
5d. What data sources did you use to determine whether your site would impact Endangered Species or Designated Critical
Habitat?
Heritage data
6. Essential Fish Habitat (Corps Requirement)
6a. Will this project occur in or near an area designated as essential fish habitat? ? Yes ® No
6b. What data sources did you use to determine whether your site would impact Essential Fish Habitat?
South Atlantic Habitat and Ecosystem Ims
7. Historic or Prehistoric Cultural Resources (Corps Requirement)
7a. Will this project occur in or near an area that the state, federal or tribal
governments have designated as having historic or cultural preservation ? Yes ® No
status (e.g., National Historic Trust designation or properties significant in
North Carolina history and archaeology)?
7b. What data sources did you use to determine whether your site would impact historic or archeological resources?
NC State Historic Preservation Office
8. Flood Zone Designation (Corps Requirement)
8a. Will this project occur in a FEMA-designated 100-year floodplain? ? Yes ® No
8b. If yes, explain how project meets FEMA requirements:
8c. What source(s) did you use to make the floodplain determination? NC Floodplain Mapping Program
AL616 -5i EPHfIJS
it id - ?W?
Applicant/Agent's Printed Name Applica t/Agent's ignature Date
(Agent's signature is valid only if an authorization letter from the applicant
is provided.)
Page 10 of 10
III. REQUIRED ITEMS CHECKLIST
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will
result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to
indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Pagel Plan
Initials Sheet No.
3w T Z -S * S-6 1. Plans (1" - 50' or larger) of the entire site showing:
- Design at ultimate build-out,
- Off-site drainage (if applicable),
- Delineated drainage basins (include Rational C coefficient per basin),
- Forebay (if applicable),
- High flow bypass system,
- Maintenance access,
- Proposed drainage easement and public right of way (ROW), and
- Boundaries of drainage easement.
?T 2. Plan details (1" = 30' or larger) for the level spreader showing:
- Forebay (if applicable),
- High flow bypass system,
- One foot topo lines between the level lip and top of stream bank,
- Proposed drainage easement, and
- Design at ultimate build-out.
J PT 4 3. Section view of the level spreader (1" = 20' or larger) showing:
- Underdrain system (if applicable),
- Level lip,
- Upslope channel, and
- Downslope filter fabric.
5 pT 4. A date-stamped photograph of the filter strip that clearly shows the type of vegetation that is present.
IRT
5. A construction sequence that shows how the level spreader will be protected from sediment until the entire
drainage area is stabilized.
6. The supporting calculations.
7. A copy of the signed and notarized operation and maintenance (O&M) agreement.
8. A copy of the deed restrictions (if required).
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Part III, page 1 of 1
O?O? ? ATF9OG
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NCDENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT
This torm must be completely filled out, printed and submitted.
DO NOT FORGET TO ATTACH THE REQUIRED ITEMS CHECKLIST AND ALL REQUIRED ITEMS (NEXT WORKSHEET)!
L PROJECT INFORMATION
Project name WINSTON POINTE
Contact name JOHN TEEL
Phone number [phone]
Date October 29, 2008
Drainage area number 1
For Level Spreaders Receiving Flow From a
Type of BMP
Drawdown flow from the BMP
For Level Spreaders Receiving Flow from the Drainage Area
Drainage area
Impervious surface area
Percent impervious
Rational C coefficient
Peak flow from the 1 in/hr storm
Time of concentration
Rainfall intensity, I0-yr storm
Peak flow from the 10-yr storm
Where Does the Level Spreader Discharge ?
To a grassed bioretention cell?
To a mulched bioretention cell?
To a wetland?
To a filter strip or riparian buffer?
Other (specify)
Filter Strip or Riparian Buffer Characterization (if applicable)
Width of grass
Width of dense ground cover
Width of wooded vegetation
Total width
Elevation at downslope base of level lip
Elevation at top of bank of the receiving water
Slope (from level lip to to top of bank)
Are any draws present?
Level Spreader Design
Forebay surface area
Feet of level lip needed per cfs
Answer "Y" to one of the following:
Length based on the 1 in/hr storm?
Length based on the 10-yr storm?
Length based on the BMP discharge rate?
Design flow
Is a bypass device provided?
cis
65,340.00 ftz
19,602.00 ftz
30.00 %
0.50
0.75 cis
5.00 min
7.2 in/hr
5.40 cfs
N (Y or N)
N (Y or N)
Y (Y or N)
Y (Y or N)
Please complete filter strip characterization below.
Please complete filter strip characterization below.
0.00 ft
50.00 ft
0.00 ft
50.00 ft
286.00 fmsl
282.00 fmsl
8.00 %
N (Y or N) OK
40.00 sq ft
13 fticfs
N (Y or N)
Y (Y or N)
N (Y or N)
5.40 cis
N (Y or N)
OK
A bypass device is not needed.
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Parts I. and II. 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
71.00 ft Level spreader length OK.
N (Y or N)
(Y or N) Do not complete this section of the worksheet.
(Y or N) Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
ft Do not complete this section of the worksheet.
ft Do not complete this section of the worksheet.
ft Do not complete this section of the worksheet.
It Do not complete this section of the worksheet.
cis Do not complete this section of the worksheet
Do not complete this section of the worksheet
? W
11
------------
M
y ? t
-------- -----
M
B
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Parts I. and II. Design Summary, page 2 of 2
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(to be provided by DWO
Drainage Area Number:
Filter Strip, Restored Riparian Buffer and Level Spreader
Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
Important maintenance procedures:
- Immediately after the filter strip is established, any newly planted vegetation
will be watered twice weekly if needed until the plants become established
(commonly six weeks).
- Once a year, the filter strip will be reseeded to maintain a dense growth of
vegetation
- Stable groundcover will be maintained in the drainage area to reduce the
sediment load to the vegetation.
- Two to three times a year, grass filter strips will be mowed and the clippings
harvested to promote the growth of thick vegetation with optimum pollutant
removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches and
may be allowed to grow as tall as 12 inches depending on aesthetic requirements
(NIPC,1993). Forested filter strips do not require this type of maintenance.
- Once a year, the soil will be aerated if necessary.
- Once a year, soil pH will be tested and lime will be added if necessary.
After the filter strip is established, it will be inspected quarterly and within 24 hours
after every storm event greater than 1.0 inch (or 1.5 inches if in a Coastal County).
Records of operation and maintenance will be kept in a known set location and will be
available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element: Potential problem: How I will remediate the problem:
The entire filter strip Trash/ debris is present. Remove the trash/ debris.
system
The flow splitter device The flow sputter device is Unclog the conveyance and dispose
(if applicable) clogged. of an sediment off-site.
The flow splitter device is Make any necessary repairs or
damaged. replace if damage is too large for
repair.
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page I of 3
BMP element: Potential problem: How I will remediate the roblem:
The swale and the level The swale is clogged with Remove the sediment and dispose
lip sediment of it off-site.
The level lip is cracked, Repair or replace lip.
settled, undercut, eroded or
otherwise damaged.
There is erosion around the Regrade the soil to create a berm
end of the level spreader that that is higher than the level lip, and
shows stormwater has then plant a ground cover and
bypassed it. water until it is established. Provide
lime and a one-time fertilizer
application.
Trees or shrubs have begun Remove them.
to grow on the swale or just
downslo a of the level lip.
The bypass channel Areas of bare soil and/or Regrade the soil if necessary to
erosive gullies have formed. remove the gully, and then
reestablish proper erosion control.
Turf reinforcement is Study the site to see if a larger
damaged or ripap is rolling bypass channel is needed (enlarge if
downhill. necessary). After this, reestablish
the erosion control material.
The filter strip Grass is too short or too long Maintain grass at a height of
if applicable). approximately three to six inches.
Areas of bare soil and/or Regrade the soil if necessary to
erosive gullies have formed. remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
Sediment is building up on Remove the sediment and
the filter strip. restabilize the soil with vegetation if
necessary. Provide lime and a one-
time fertilizer application.
Plants are desiccated. Provide additional irrigation and
fertilizer as needed.
Plants are dead, diseased or Determine the source of the
dying. problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application.
Nuisance vegetation is Remove vegetation by hand if
choking out desirable species. possible. If pesticide is used, do not
allow it to get into the receiving
water.
The receiving water Erosion or other signs of Contact the NC Division of Water
damage have occurred at the Quality local Regional Office, or the
outlet. 401 Oversight Unit at 919-733-1786.
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 2 Of 3
r611ll11 114U111vul
(to be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the 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.
Project name: WINSTON POINTE
BMP drainage area number: #1
Print name: ALGIE STEPHENS
Title: OWNER/DEVELOPER
Address: 319 CHAPANOKE ROAD
Phone: [phone]
Signature:
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, ?-d- 1? ct tn4_ , a Notary Public for the State of
County of gLUa k _ , do hereby certify that
Lu %42(1,aAQIA? personally appeared before me this 94-k-
day of :ZO D8 , and acknowledge the due execution of the
forgoing filter strip, riparian buffer, and/or level spreader maintenance requirements.
Witness my hand and official seal,
"%gilN wy11t
NOTARY
A PUBLIC
i?iOUN T*41
SEAL
My commission expires S 0 / D
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer I&M-Rev.2 Page 3 of 3

?TMp,NOS AND STOit'MW??? t? •'', ? "."`..
STORM WATER
MANAGEMENT
FOR
WINSTON PONITE
QC?
C1'?c,Q?OS

SEAL
22024
47-
STORM WATER MANAGEMENT PLAN
PURPOSE: TO RELEASE POST DEVELOPMENT RUNOFF AT A
RATE NOT TO EXCEED PRE-DEVELOPMENT RUNOFF. PROVIDE
STORAGE AND WATER SURFACE AREA TO PROVIDE FOR T.S.S.
AND NITROGEN LOADING REDUCTION.
PLAN: - COMPUTE SURFACE AREA NEEDED
- COMPUTE VOLUME OF 1" FLUSH
- COMPUTE TARGET RUNOFF RATE.
-COMPUTE RUNOFF RATE WITH DESIGN PLAN.
-DESIGN FEATURES OR CONTROLS TO MEET
PURPOSE AND PROVIDE REQUIRED STORAGE.
OUTLET DEVICE #1
SURFACE AREA REQUIRED
ESTIMATED IMPERVIOUS SURFACE PERCENTAGE FOR TOTAL DRAINAGE
AREA TO THE STORAGE DEVICE IS 70%.
FOR A 5 FOOT DEEP PERMANT POOL THE SURFACE AREA REQUIRED
WOULD BE 2.07% OF THE TOTAL DRAINAGE AREA TO THE DEVICE.
IF:
D.A. TOTAL = 21.7 ACRE
THEN:
2.07% OF 21.7 ACRES = 19,567 SQUARE FEET
SURFACE AREA PROVIDED FOR PERMANENT POOL = 19,670 SQUARE FEET
VOLUME REQUIRED
VOLUME CALCULATED BY SIMPLE METHOD DESCRIBED BY THE NCDWQ
BMP DESIGN MANUAL.
Rv = 0.05 + 0.9 * Ia
Ia = 15.2ac imp / 21.7ac d.a. = 0.70
Rv = 0.05 + 0.9 * 0.70 = 0.665
V = 3630 * 1" * 0.665 * 21.7 = 52,383Ft3
VOLUME REQUIRED = 52,383Ft3
VOLUME PROVIDED = 54,093Ft3
STAGE 29LT ABOVE WATER SURFACE
(J kAw Dower T i qC = V7 HP-S

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RETENTION DEVICE #1
V DRAWDOWN

TIME
INFLOW
STORAGE
STAGE
OUTFLOW R1.75"
outlet
MIN CFS CU. FT. FT CFS
0 0 73225 2.75 0.5 0.46
60 0.00 71560.52 2.6 0.4 0.45
120 0.00 69950.63 2.5 0.4 0.44
180 0.00 68357.63 2.5 0.4 0.44
240 0 66781.54 2.4 0.4 0.43
300 0.00 65222.39 2.4 0.4 0.43
360 0.00 63680.21 2.3 0.4 0.42
420 0.00 62155.04 2.3 0.4 0.42
480 0 60646.90 2.2 0.4 0.41
540 0.00 59155.83 2.2 0.4 0.41
600 0.00 57681.86 2.1 0.4 0.40
660 0.00 56225.02 2.1 0.4 0.40
720 0 54785.34 2.0 0.4 0.40
780 0.00 53362.86 2.0 0.4 0.39
840 0.00 51957.62 1.9 0.4 0.39
900 0.00 50569.64 1.9 0.4 0.38
960 0 49198.97 1.8 0.4 0.38
1020 0.00 47845.63 1.8 0.4 0.37
1080 0.00 46509.68 1.7 0.4 0.37
1140 0.00 45191.14 1.7 0.4 0.36
1200 0 43890.05 1.6 0.4 0.36
1260 0.00 42606.45 1.6 0.4 0.35
1320 0.00 41340.39 1.5 0.3 0.35
1380 0.00 40091.90 1.5 0.3 0.34
1440 0 38861.02 1.5 0.3 0.34
1500 0.00 37647.79 1.4 0.3 0.33
1560 0.00 36452.27 1.4 0.3 0.33
1620 0.00 35274.48 1.3 0.3 0.32
1680 0 34114.49 1.3 0.3 0.32
1740 0.00 32972.32 1.3 0.3 0.31
1800 0.00 31848.04 1.2 0.3 0.31
1860 0.00 30741.68 1.2 0.3 0.30
1920 0 29653.30 1.1 0.3 0.30
1980 0.00 28582.95 1.1 0.3 0.29
2040 0.00 27530.67 1.1 0.3 0.29
2100 0.00 26496.52 1.0 0.3 0.28
2160 0 25480.55 1.0 0.3 0.28
2220 0.00 24482.83 1.0 0.3 0.27
2280 0.00 23503.40 0.9 0.3 0.27
2340 0.00 22542.32 0.9 0.3 0.26
2400 0 21599.65 0.8 0.3 0.26
2460 0.00 20675.46 0.8 0.3 0.25
2520 0.00 19769.80 0.8 0.2 0.25
2580 0.00 18882.75 0.7 0.2 0.24
2640 0 18014.36 0.7 0.2 0.24
2700 0.00 17164.71 0.7 0.2 0.23
2760 0.00 16333.87 0.7 0.2 0.23
2820 0.00 15521.91 0.6 0.2 0.22
2880 0 14728.90 0.6 0.2 0.21
2940 0.00 13954.94 0.6 0.2 0.21
3000 0.00 13200.08 0.5 0.2 0.20
3060 0.00 12464.43 0.5 0.2 0.20
3120 0 11748.07 0.5 0.2 0.19
3180 0.00 11051.08 0.5 0.2 0.19
3240 0.00 10373.57 0.4 0.2 0.18
3300 0.00 9715.63 0.4 0.2 0.18
3360 0 9077.37 0.4 0.2 0.17
3420 0.00 8458.89 0.4 0.2 0.17
3480 0.00 7860.30 0.3 0.2 0.16
3540 0.00 7281.72 0.3 0.2 0.16
3600 0 6723.28 0.3 0.1 0.15
3660 0.00 6185.11 0.3 0.1 0.14
3720 0.00 5667.34 0.2 0.1 0.14
3780 0.00 5170.13 0.2 0.1 0.13
3840 0 4693.63 0.2 0.1 0.13
3900 0.00 4238.00 0.2 0.1 0.12
3960 0.00 3803.43 0.2 0.1 0.11
4020 0.00 3390.11 0.2 0.1 0.11
4080 0 2998.24 0.1 0.1 0.1
4140 0.00 2628.04 0.1 0.1 0.1
4200 0.00 2279.78 0.1 0.1 0.1
4260 0.00 1953.71 0.1 0.1 0.1
4320 0 1650.15 0.1 0.1 0.1
4380 0.00 1369.44 0.1 0.1 0.1
4440 0.00 1111.96 0.1 0.1 0.1
4500 0.00 878.16 0.0 0.1 0.1
4560 0 668.58 0.0 0.1 0.1
4620 0.00 483.88 0.0 0.0 0.0
COMBINATION STORM WATER CALCULATIONS
Iyr STORM
DETERMINE PRE DEVELOPMENTAL CONDITIONS:
DISCHARGE BY SCS METHOD AS DESRIBED IN THE Tr-55 MANUAL
Qp=quXAmXQ*
nPTFRMMP PYTCTTMrir rn VAT.TIF. FOR 91TR
SOIL CLASS USE AREA ac Cn
B FAIR PASTURE 3.60 69
B FAIR WOODS 18.1 60

[(3.60 X 69) + (18,1 X 60)] / 21.7 = 62
Cn PRE = 62
DETERMINE RUNOFF DEPTH AND PEAK FLOW FOR EXISTING CONDITIONS
FOR THE 1 yr / 3" EVENT
P = 379
A = 21.7ac - 0.034mi2
S = [1000/Cn]-10
= 6.13
Q* = [(P-0.2S)2] / (P +0.8S)
Q* = 0.40"
la =1.226
IaA/P = 0.41
Tp = CALC DETAILS ATTACHED
SHEET FLOW = 0.87hr
SHALLOW FLOW = 0.07hr
CHANNEL FLOW = 0.02hr
Tp = 0.96hr
Qu = 245 (EXHIBIT 4-II)
Qp = 245(0.034)0.40 = 3.33 cfs
PEAK FLOW FOR THE 1 YEAR EVENT = 3.33 cfs
DETERMINE POST DEVELOPMENTAL CONDITIONS:
DISCHARGE BY SCS METHOD AS DESRIBED IN THE Tr-55 MANUAL
3" EVENT
Qp=quXAmXQ*
T)FTF.RMTNF. PROPOSED Cn VALUE FOR SITE
SOIL CLASS USE AREA ac Cn
B FAIR PASTURE 4.50 69
B IMPERVIOUS 15.19 98
B FAIR WOODS 2.01 60

[(4.50 X 69) + (15.19 X 98) + (2.01 X 60)] / 21.7 = 89
Cn POST = 89
DETERMINE RUNOFF DEPTH AND PEAK FLOW FOR PROPOSED CONDITIONS
FOR THE 1 yr / 3" EVENT
P = 399
A = 21.7ac - 0.034mi2
S = [1000/Cn]-10
= 1.24
Q* = [(P-0.25)2] / (P +0.8S)
Q* = 1.90"
la = 0.248
IaA/P = 0.083
Tp = CALC DETAILS ATTACHED
SHEET FLOW = 0.87hr
SHALLOW FLOW = 0.07hr
CHANNEL FLOW = 0.02hr
Qu = 375 (EXHIBIT 4-11)
Tp = 0.96hr
Qp = 375(0.034)1.90 = 24.23 cfs
PEAK FLOW FOR THE 1 YEAR EVENT = 24.23 cfs

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COMBINATION STORM WATER CALCULATIONS
l0yr STORM
DETERMINE PRE DEVELOPMENTAL CONDITIONS:
DISCHARGE BY SCS METHOD AS DESRIBED IN THE Tr-55 MANUAL
Qp=quXAmXQ*
TIRTRRMMP F.XTRTTNC~T Cn VALTIF, FOR 9TTF.
SOIL CLASS USE AREA ac Cn
B FAIR PASTURE 3.60 69
B FAIR WOODS 18.1 60

[(3.60 X 69) + (18.1 X 60)] / 21.7 = 62
Cn PRE = 62
DETERMINE RUNOFF DEPTH AND PEAK FLOW FOR EXISTING CONDITIONS
FOR THE IOyr / 5.38" EVENT
P = 5.38"
A = 21.7ac - 0.034mi2
S = [1000/Cn]-10
= 6.13
Q* = [(P-0.2S)2] / (P +0.8S)
Q* = 1.68"
la = 1.226
IaA/P = 0.23
Tp = CALC DETAILS ATTACHED
SHEET FLOW = 0.87hr
SHALLOW FLOW = 0.07hr
CHANNEL FLOW = 0.02hr
Tp = 0.96hr
Qu = 340 (EXHIBIT 4-II)
Qp = 340(0.034)1.68 = 19.42 cfs
PEAK FLOW FOR THE 10 YEAR EVENT = 19.42 cfs
DETERMINE POST DEVELOPMENTAL CONDITIONS:
DISCHARGE BY SCS METHOD AS DESRIBED IN THE Tr-55 MANUAL
5.38" EVENT
Qp=quXAmXQ*
Tn'V-rlQn WATATR UT? n13n4ZT7Tl rn V A T.T TF MR 4TTF.
SOIL CLASS USE AREA ac Cn
B FAIR PASTURE 4.50 69
B IMPERVIOUS 15.19 98
B FAIR WOODS 2.01 60

[(4.50 X 69) + (15.19 X 98) + (2.01 X 60)] / 21.7 = 89
Cn POST = 89
DETERMINE RUNOFF DEPTH AND PEAK FLOW FOR PROPOSED CONDITIONS
FOR THE IOyr / 5.38" EVENT
P = 5.38"
A = 21.7ac - 0.024mi2
S = [1000/Cn]-10
= 1.24
Q* = [(P-0.2S)2] / (P +0.8S)
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la = 0.248
IaA/P = 0.05
Tp = CALC DETAILS ATTACHED
SHEET FLOW = 0.87hr
SHALLOW FLOW = 0.07hr
CHANNEL FLOW = 0.02hr
Qu = 375 (EXHIBIT 4-II)
Tp = 0.96hr
Qp = 375(0.034)4.13 = 52.66 cfs
PEAK FLOW FOR THE 10 YEAR EVENT = 52.66 cfs

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COMBINATION STORM WATER CALCULATIONS
100yr STORM
DETERMINE PRE DEVELOPMENTAL CONDITIONS:
DISCHARGE BY SCS METHOD AS DESRIBED IN THE Tr-55 MANUAL
Qp=quXAmXQ*
nT7TVnrATATR RVTQTTAT(T ['fin VAT.TTF. FOR RITR
Y SOIL CLASS USE AREA (ac) Cn
B FAIR PASTURE 3.60 69
B FAIR WOODS 18.1 60

[(3.60 X 69) + (18.1 X 6U) j / 21 --/ = 62
Cn PRE = 62
DETERMINE RUNOFF DEPTH AND PEAK FLOW FOR EXISTING CONDITIONS
FOR THE 100yr / 8" EVENT
P = 8"
A = 15.5ac - 0.034mi2
S = [1000/Cn]-10
= 6.13
Q* = [(P-0.2S)2] / (P +0.8S)
Q* = 3.56"
la = 1.226
IaA/P = 0.15
Tp = CALC DETAILS ATTACHED
SHEET FLOW = 0.87hr
SHALLOW FLOW = 0.07hr
CHANNEL FLOW = 0.02hr
Tp = 096hr
Qu = 350 (EXHIBIT 4-II)
Qp = 350(0.034)3.56 = 42.36 cfs
PEAK FLOW FOR THE 100 YEAR EVENT = 42.36 cfs
DETERMINE POST DEVELOPMENTAL CONDITIONS:
DISCHARGE BY SCS METHOD AS DESRIBED IN THE Tr-55 MANUAL
8" EVENT
Qp=quXAmXQ*
nr,rvUTdTATR lDvrlvn4ZlP I r n V AT T TF FOR Q%TTF.
SOIL CLASS USE AREA ac Cn
B FAIR PASTURE 4.50 69
B IMPERVIOUS 15.19 98
B FAIR WOODS 2.01 60

[(4.50 X 69) + (15.19 X 98) + (2.01 X 60)] / 21.7 = 89
Cn POST = 89
DETERMINE RUNOFF DEPTH AND PEAK FLOW FOR PROPOSED CONDITIONS
FOR THE 100yr / 8" EVENT
P = 8"
A = 21.7ac - 0.034mi2
S = [1000/Cn]-10
=1.24
Q* = [(P-0.25)2] / (P +0.8S)
Q* = 6.68"
Ia = 0.248
IaA/P = 0.03
Tp = CALC DETAILS ATTACHED
SHEET FLOW = 0.87hr
SHALLOW FLOW = 0.07hr
CHANNEL FLOW = 0.02hr
Qu = 375 (EXHIBIT 4-II)
Tp = 0.96hr
Qp = 375(0.034)6.68 = 85.17 cfs
PEAK FLOW FOR THE 100 YEAR EVENT = 85.17 cfs

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SUMMARY DEVICE # 1
OUTLET WILL CONSEST OF ONE 72in DIAMETER H.D.P.E.
OUTLET RISER PIPE WITH HOLES BORED INTO IT. EVERY HALF
FOOT VERTICALY THERE WILL BE A ROW OF 20 X 1 inch RADIUS
HOLES SET ROUGHLY 7.5inchs ON CENTER. THE ROWS WILL BE
STAGGARED. THE OUTLET BARRELL WILL BE A 36inch H.D.P.E.
PEAK FLOWS FROM THE STORMS:
1 YEAR:
PRE: 3.33 cfs
POST: 24.23 cfs
DEVICE: 3.2 cfs
10 YEAR:
PRE: 19.42 cfs
POST: 52.66 cfs
DEVICE: 8.1 cfs
THE 100 YEAR STORM IS PASSED THROUGH A DESIGNED
SPILLWAY TO CARRY THE 100 YEAR FLOW AWAY FROM THE
DEVICE.
EMERGENCY SPILLWAY DESIGN
Q100=85.17 cfs
Q = CLH3i2
SOLVING FOR L LEAVES L= Q/(CH3/2)
L = 85.17/(3)1'-'= 28.39
MAKE L = 29'
EMERGENCY SPILLWAY IS 1' HIGH WITH AN OPENING 29' WIDE.
ELEVATIONS:
PERMENANT POOL: FROM 291' TO 296'
1" RAINFALL EVENT STOARAGE: FROM 296' TO 298.5'
STORMWATER EVENT STORAGE: FROM 298.5' TO 299.5'
SPILLWAY ELEVATIONS FROM 301.0' TO 302.0'
TOP OF DAM: 302.0'