20090107 Ver 2_401 Application_20090609

LETTER OF TRANSMITTAL
DEVELOPMENT CONSULTING SERVICES, INC.
1401 Aversboro Road, Suite 206
Garner, North Carolina 27529
[phone] phone l7 q - o pi v 2-
[phone] fax
PAID
To: Annette Lucas From: Dexter Howell
Company: NCDENR-DWQ Date: Thursday, June 04, 2009
Address:
Crabtree Blvd. RE: Coates Grading and Hauling-Asphalt Plant

F] URGENT [-] Reply ASAP F-] Please Comment A Please Review F1 For Your Information
COPIES DATE NO. DESCRIPTION
5 06/04/09 Sets of plans / Lt? i ;
5 06/04/09 PCN Forms
1 06/04/09 401 Checklist
1 06/04/09 USGS Map DFNR- WATERQUAUTy
1 06/04/09 Soils Map TERBRANCFI
1 06/04/09 Drainage Calculations
1 06/04/09 Level Spreader Calculations
1 06/04/09 Level Spreader Supplement and O & M Agreement
1 06/04/09 Check for $240
1 06/04/09 Pond Calculations
1 06/04/09 Pond Supplement Form and O & M Agreement
Comments:

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Office Use Only:
Corps action ID no.
DWQ project no.
Form Version 1.4 January 2009
Pre-Construction Notification (PCN) Form ]IN is 19
A. Applicant Information 1% AL I-IL in
67
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: 14 or General Permit (GP) number:
1c. Has the NWP or GP number been verified by the Corps? ?X Yes ? No
1 d. Type(s) of approval sought from the DWQ (check all that apply):
Z 401 Water Quality Certification - Regular ? Non-404 Jurisdictional General Permit
? 401 Water Quality Certification - Express 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 ?X No For the record only for Corps Permit:

? Yes ?X 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 ?X 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: Coates Hauling and Grading - Asphalt Plant
2b. County: Johnston
2c. Nearest municipality / town: Smithfield
2d. Subdivision name: N/A
2e. NCDOT only, T.I.P. or state project no: N/A 0 i? J +
3. Owner Information L?
3a. Name(s) on Recorded Deed: Crossroads Development Corporation
3b. Deed Book and Page No. DB 1495 Page 0283 DENR - WATERQUALITY
3c. Responsible Party (for LLC if
applicable): Crossroads Development Corporation
3d. Street address: 12400 NC 50 N
3e. City, state, zip: Willow Springs, NC 27592
3f. Telephone no.: 919-989-9702
3g. Fax no.:
3h. Email address:
Page 1 of 10
PCN Form - Version 1.4 January 2009
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: Keith Roberts
5b. Business name
(if applicable): Development Consulting Services
5c. Street address: 1401 Aversboro Road Suite 206
5d. City, state, zip: Garner, NC 27529
5e. Telephone no.: 919-329-0051
5f. Fax no.: 919-772-3437
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): 162400-90-6944
1 b. Site coordinates (in decimal degrees): Latitude: 35.50905 Longitude: -78.55896
1 c. Property size: 58.48 acres
2. Surface Waters
2a. Name of nearest body of water to proposed project: Pole Cat Branch
2b. Water Quality Classification of nearest receiving water: C:NSW
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:
The existing site is approximately 80% wooded and 20% cleared. The cleared area has a cell tower existing and the rest of the site is used for
farming.
3b. List the total estimated acreage of all existing wetlands on the property: 0.42
3c. List the total estimated linear feet of all existing streams (intermittent and perennial) on the property: 2,715
3d. Explain the purpose of the proposed project:
Proposed asphalt plant and to construct a road from NC Hwy 210 to SR 1324 (Pleasant Coates Road).
3e. Describe the overall project in detail, including the type of equipment to be used:
Asphalt producing facility with the main traffic being dump trucks. The trucks will bring material on site and trucks will take the finished product off site.
4. Jurisdictional Determinations
4a. Have jurisdictional wetland or stream determinations by the
Corps or State been requested or obtained for this property /

project (including all prior phases) in the past? ? Yes ? No ?X Unknown

Comments:
4b. If the Corps made the jurisdictional determination, what type
of determination was made?
? Preliminary ? Final
4c. If yes, who delineated the jurisdictional areas?
Name (if known): Agency/Consultant Company:
Other:
4d. If yes, list the dates of the Corps jurisdictional determinations or State determinations and attach documentation.
5. Project History
5a. Have permits or certifications been requested or obtained for
this project (including all prior phases) in the past? ?Yes ?X No
? Unknown
5b. If yes, explain in detail according to "help file" instructions.
6. Future Project Plans
6a. Is this a phased project? ? Yes ?X No
6b. If yes, explain.
Page 3 of 10
PCN Form - Version 1.4 January 2009
C. Proposed Impacts Inventory
1. Impacts Summary
1 a. Which sections were completed below for your project (check all that apply):
? Wetlands ? Streams - tributaries ?X 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 impact Type of wetland Forested Type of jurisdiction Area of
number Corps (404,10) or impact
Permanent (P) or
DWQ (401, other) (acres)
Temporary T
W1 - Choose one Choose one Yes/No
W2 - Choose one Choose one Yes/No
W3 Choose one Choose one Yes/No
W4 Choose one Choose one Yes/No
W5 Choose one Choose one Yes/No
W6 Choose one Choose one Yes/No
2g. Total Wetland Impacts:
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 (PER) or Type of Average Impact
number intermittent (INT)? jurisdiction stream length
Permanent (P) or width (linear
Temporary (T) (feet) feet)
S1 P Culvert Pole Cat Branch - DWQ 100
S2 Choose one
S3 Choose one
S4 - Choose one
S5 Choose one
S6 Choose one
3h. Total stream and tributary impacts
3i. Comments:
Page 4 of 10
PCN Form - Version 1.4 January 2009
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
Permanent (P) or (if applicable) Type of impact Waterbody Area of impact (acres)

Temporary T type
01 Choose one
Choose
02 Choose one Choose
03 - Choose one Choose
04 Choose one Choose
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.
Pond ID number Proposed use or Wetland Impacts (acres) Stream Impacts (feet) Upland
purpose of pond (acres)
Flooded Filled Excavated Flooded Filled Excavated
P1 Choose one
P2 Choose one
5f. Total:
5g. Comments:
5h. Is a dam high hazard permit required? ? Yes ? No If yes, permit ID no:
5i. Expected pond surface area (acres):
5j. Size of pond watershed (acres):
5k. Method of construction:
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. Project is in which protected basin? ? Neuse ? Tar-Pamlico ? Catawba ? Randleman ? Other:
6b. 6c. 6d. 6e. 6f. 6g.
Buffer Impact Reason for impact Stream name Buffer Zone 1 Zone 2
number -
Permanent (P) or mitigation impact impact

Temporary T required? (square (square
feet feet
61 P Stream Crossing Pole Cat Branch Yes/No 5,086 3,136
B2 Yes/No
B3 - Yes/No
B4
Yes/No
B5
Yes/No
B6 Yes/No
6h. Total Buffer Impacts:
6i. Comments:
rage 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.
The stream crossing was designed perpendicular to the stream with the vertical profile as low as possible to minimize the fill section impact from the
crossing. Protective silt fence is being installed by the wetlands on the west side of crossing to eliminate any wetland impacts during construction.
1 b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques.
The road is designed with 20' if asphalt, headwalls, and without curb and gutter. These elements will help to minimize impacts.
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 ?X 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
? 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: Choose one
Type: Choose one
Type: Choose one Quantity:
Quantity:
Quantity:
3c. Comments:
4. Complete if Makin 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: Choose one
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 1.4 January 2009
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
1a. Does the project include or is it adjacent to protected riparian buffers identified
i
h ?X Yes ? No
w
t
in one of the NC Riparian Buffer Protection Rules?
1 b. If yes, then is a diffuse flow plan included? If no, explain why.
?X Yes ? No
2. Stormwater Management Plan
2a. What is the overall percent imperviousness of this project?
13%

2b. Does this roiect require a Stormwater Management Plan? Z 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:
The site to the south of the stream will drain into a detention pond with a 10' filter strip. Their will be a scour hole to the north of the stream to create
diffuse flow before entering the stream.
2e. Who will be responsible for the review of the Stormwater Management Plan? Johnston County
3. Certified Local Government Stormwater Review
3a. In which local government's jurisdiction is this project? Johnston County
? Phase II
3b. Which of the following locally-implemented stormwater management programs N NSW
apply (check all that apply): ? USMP
? Water Supply Watershed
? Other:
3c. Has the approved Stormwater Management Plan with proof of approval been ?Yes X? No
attached?
4. DWQ Stormwater Program Review
?Coastal counties

4a. Which of the following state-implemented stormwater management programs apply ?HQW
?ORW
(check all that apply): ?Session Law 2006-246
?Other:
4b. Has the approved Stormwater Management Plan with proof of approval been ? Yes ?X No
attached?
5. DWQ 401 Unit Stormwater Review
5a. Does the Stormwater Management Plan meet the appropriate requirements? ?X Yes ? No
5b. Have all of the 401 Unit submittal requirements been met? ? Yes ? No
Page 8 of 10
PCN Form - Version 1.4 January 2009
F. Supplementary Information
1. Environmental Documentation (DWQ Requirement)
1 a. Does the project involve an expenditure of public (federal/state/local) funds or the
?Yes
?X 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)?
1 c. 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

letter.)
? Yes ?
No
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 i or available capacity of the subject facilit
This project will tie into the ex sting sewer system that is operated by Johnston county.
Page 9 of 10
PCN Form - Version 1.4 January 2009
5. Endangered Species and Designated Critical Habitat (Corps Requirement)
5a. Will this project occur in or near an area with federally protected species or
habitat?
? Yes ? No
5b. Have you checked with the USFWS concerning Endangered Species Act
impacts?
El
Yes E] No
5c. If yes, indicate the USFWS Field Office you have contacted. _
5d. What data sources did you use to determine whether your site would impact Endangered Species or Designated Critical
Habitat?
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?
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
status (e.g., National Historic Trust designation or properties significant in
North Carolina history and archaeology)?

? Yes ? No
7b. What data sources did you use to determine whether your site would impact historic or archeological resources?
8. Flood Zone Designation (Corps Requirement)
8a. Will this project occur in a FEMA-designated 100-year floodplain? ? Yes ?X No
8b. If yes, explain how project meets FEMA requirements:
8c. What source(s) did you use to make the floodplain determination?
ncfloodmaps.com
G?IG?fAT? ? ??S
Applicant/Agent's Printed Name
Applicant/Agent's Signature
(Agent's signature is valid only if an authorization
letter from the applicant is provided.) i?zd/o9
Date
Page 10 of 10
Version 1.4
January 9, 2009
401 Oversight/Express Permitting PCN Submittal Checklist
The application fee (Checks may be made out to "N.C. Division of Water Quality"
- $240.00 for 401 Water Quality Certification with minor impacts
- $570.00 for 401 Water Quality Certification with major impacts
- Express Review Fee (Amount requested on Acceptance Letter)
Five (5) complete and collated copies of the PCN Application and supporting
documentation (instead of providing 5 copies of the full size plans you may provide two
copies of full size plans along with three copies of 11 X 17 plans)
? Stormwater Management Plan (if applicable - see PCN Form Help File Section E)
1) Please provide three (3) copies of the stormwater management plans along with all
supporting information pertaining to this project including the following:
a. Entire site development/layout plans delineating all drainage areas;
b. Design calculation sheets for all proposed BMPs) sized for both on-site and
off-site drainage;
c. BMP supplements for each proposed BMP and Required Items Check List
(http://h2o.enr.state.nc.us/su/bmp forms.htm) along with all required
items;
d. A Notarized Operation & Maintenance Agreement for each stormwater
management facility;
e. Detailed construction drawing sheets shall include
(i) Erosion and sediment control plans;
(ii) Installation and planting schedules for the proposed BMPs;
(iii) Appropriately scaled plan views and cross sectional details of all
BMPs and associated components - inlet and outlet structures,
forebay, respective zones and pertinent elevations.
? If your project is located within a State implemented Riparian Buffer Rule Area, submit the
following along with site plans and PCN form:
1) Three (3) copies of the details for on-site diffuse flow provisions, (refer to
http://h2o.enr.state.nc.us/su/bmp_jorms.htm).
DWQ Stream Determination Forms for streams on property and DWQ determination
letter for wetlands or streams (if applicable).
The following is the most critical of all the information that you must provide. The quality and
detail of the information will often determine the expeditiousness of the review. The following is
a checklist of the types of pertinent information required at a minimum:
Maps and Plans:
El/ The most recent version of the 1:24,000 USGS Topographic Map - Please cleanly draw or
delineate the site boundaries on the topographic map.
? The most recent version of the bound and published County NRCS Soil Survey Map -
(required for projects within the Neuse River Basin, Tar-Pamlico River Basin, Randleman
Lake Watershed and the Catawba River Basin, also recommended for all projects) -
Please clearly delineate the site boundaries, etc. on the map. If the delineation obscures
any of the features, it is recommended that a clean copy be provided. Copies of the
Version 1.4
January 9, 2009
current soil survey and/or soil survey map sheets can be obtained from the local NRCS
County Office (http://www.nc.nrcs.usda.aov/). GIS soil layers are not acceptable.
Zvicinity map - Please clearly mark the location and approximate boundaries of the property
and project on the map. Please indicate north arrow and scale. Please include applicable
road names or State Road numbers.
d The Site Plan - The most critical map to be provided is the site plan. You must provide full
sized plans. The following is the minimum list of plans that are typically needed.
[Pre-construction/Pre-existing conditions - This sheet (or sheets) must include:
• All jurisdictional and non-jurisdictional wetland, stream, water features, State regulated
buffers (delineated into Zones 1 and 2)
• Topographic contours with elevations
• Any existing structures and impervious areas
• Existing utility lines and easements
• Existing roads, culverts, and other pertinent features
• North arrow and the scale (1":50' scale is recommended).
[Proposed conditions - This sheet (or sheets) must include:
• All jurisdictional and non-jurisdictional wetland, stream, water features, State regulated
buffers (delineated into Zones 1 and 2)
• Lot layout (if a subdivision or commercial development is proposed) - lots must be
developable without further impacts to jurisdictional and non iurisdictional wetlands
streams, water features and State regulated buffers Building envelopes must be
provided when streams, wetlands, riparian buffers, or water features exist on a lot
• All built-out structures and impervious cover
• Final grading contours with elevations
• All utilities and easements (including septic fields on all lots within 100 feet of stream,
wetland, or water features - if applicable)
• Impacted areas - these should correspond with the Impact numbers listed on your PCN
form.
Drainage Plans - Final drainage plans must include the following:
• Locations and pertinent elevations and sizes of the stormwater collection system and
drainage ways
• All inlets and outlets must also be shown with pertinent elevations (All outlets to
wetlands must be at a non-erosive velocity generally less than 2 ft/sec during the peak
flow from the 10-yr storm)
• Scaled stormwater BMPs must also be indicated as required by DWQ rules and policies
• In certain cases (see Section E of PCN form), final stormwater management plans must
also be provided (see Stormwater Management Plan Checklist)
L1 Proposed Impacts - All impacts to jurisdictional and non-jurisdictional wetland, stream,
water features, and State regulated buffers must be shown and labeled on the site plans at
a scale no smaller than 1" = 50'. All excavation, fill, flooding, stabilization, and other impacts
that will be conducted in or near jurisdictional and non jurisdictional wetland, stream, water
features, and State regulated buffers must be indicated. Please provide cross sectional
details showing the provisions for aquatic life passage (burial of culvert 20% for culverts :5 48
inches, and 1-foot for culverts > 48 inches).
Version 1.4
January 9, 2009
Wetland Impacts:
[?] Precise grading and final elevation contours must be provided. Existing
vegetation and any clearing must be specified.
All subsurface utility lines must indicate the location of anti-seep collars.
Construction detail for anti-seep collars must be provided.
Roadway or other crossings of riparian wetlands may require floodway culverts to
maintain existing hydrological conditions.
Plans should show that the hydrology of remaining wetlands on the site will be
maintained.
Stream Impacts:
Stream impacts must be clearly shown on the plans. The centerline as well as
the banks of the stream must be surveyed or located by GPS for the portion of
the stream to be impacted.
[?J The inlet and the outlet of all culverts should be aligned with the stream as
much as possible. Inlet and outlet elevations and streambed elevations should
be indicated. Any inlet or outlet protection must be shown and enumerated on
the impact map(s).
For bottomless culverts or other spans, a vertical cross section should be
provided that shows the minimum distance from each span to each stream bank,
the stream cross section, the height of the span above the stream and the
minimum distance from the edge of each footer to each stream bank.
Additionally, please provide a signed and sealed geotechnical report of
subsurface soils at the proposed bottomless culvert location. The report must
comply with the Division of Highways - Guidelines for Drainage Studies and
Hydraulic Design, prepared by A.L. Hankins, Jr., State Hydraulics Engineer -
/ 1999.
? Multiple culverts or sectioned box culverts typically require the use of sills, off-
setting or other means to match the cross section of the existing stream (in order
to maintain stream stability and provide aquatic life passage). A vertical cross
section of the culverts should be shown overlain with the up and downstream
stream cross section including the stream flood-prone area.
Impacts associated with dam construction must indicate and enumerate all fill
associated with the dam footprint, spillway and any bank stream bank
stabilization. The length of stream impounded must also be indicated and
enumerated.
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DRAINAGE CALCULATIONS
COATES GRADING AND HAULING-ASPHALT PLANT
JOHNSTON COUNTY, NORTH CAROLINA
JOHNSTON COUNTY
PO BOX 2263
SMITHFIELD, NC 27577
SUBMITTED BY: DEVELOPMENT CONSULTING SERVICES, INC.
1401 AVERSBORO ROAD, SUITE 206
GARNER, NC 27529
[phone]
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023128 ?$
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ASPHALT PLANT
Stnrm rlrmimmfin

Inlet DA FDA
C
I (in/hr)
Q (cfs) Pipe
Size
Length
Hw
H
CB #1 1.65 1.65 0.8 8.5 11.2 24" 20' 0.9 0.1
CB #2 10.08 10.08 0.63 8.5 54.0 2-30" 16' 1.0 0.3
CB #3 0.38 0.38 0.8 8.5 2.6 24" 16' 1.3 0.4
CB #4 0.89 1.11 0.8 8.5 7.5 18" 64' 0.5 0.1
FES#1 4.44 4.44 0.41 8.5 15.5 24" 96' 0.3 0.1
FES#1A 0.3 4.74 0.8 8.5 32.2 36" 76' 0.4 0.1
FES#2 0.22 0.22 0.8 8.5 1.5 15" 88' 0.5 0.2
FES #3 0.38 1.49 0.8 8.5 10.1 24" 112' 0.5 0.1
HW #1* 294.26 294.26 72" 44' 0.5 0.1
84" 44'
HW #2* 56.19 56.19 54" 46' 0.5 0.2
*Pinc AncinnnA -inn Klt? RA .. c
v ---- ---...? . -- ...... r, ... ..?....,..,Z1, ? vvi iwulo
wissipators
Outlet @ Q (cfs) Pipe Size Slope Vel (fps) Dissipator D50
CB #1 11.2 24" 2.5% 4.5 4.5'x6'x18" 6"
CB #2 54.0 2-30" 3.1% 2.7 4.5'x6'x18" 6"
CB #3 2.6 24" 4.2% 10.0 4.5'x9'x24" 13"
CB #4 7.5 18" 0.5% 10.1 4.5'x9'x24" 13"
FES#1 15.5 24" 2.5% 7.5 9'x18'x18" 6"
FES#1A 32.2 36" 2.5% 6.0 4.5'x6'x18" 6"
FES#2 1.5 15" 2.7% 4.8 4.5'x6'x18" 6"
HW #2* 98.73 54" 1.0% 14'x27'x30" 23"
FES #3 10.1 24" 0.5% 12.0 4'x8'x24" 13"
HW #1* 423.1 72"&84" 1.0% 28'x65'x30" 23"
Asphalt Plant - DITCH PROTECTION
Street Name STA Da C I Q10(cfs) Slope Matting Type
From To
Commercial Offsets
LT 14+00 15+75 0.39 0.45 7.22 1.27 0.75% unreinforced
RT 14+00 15+75 0.08 0.45 7.22 0.26 0.75% unreinforced
* LT 15+75 17+25 0.33 0.45 7.22 1.07 3.50% C350-Staple E
RT 15+75 17+25 0.08 0.7 7.22 0.40 3.50% C350-Staple E
LT
* 17+25 19+50 0.12 0.7 7.22 0.61 5.75% C350-Staple E
RT 17+25 19+50 0.32 0.45 7.22 1.04 5.75% C350-Staple E
LT 19+50 HW-2 0.06 0.7 7.22 0.30 0.50% unreinforced
RT 19+50 HW-2 0.40 0.45 7.22 1.30 0.50% unreinforced
LT HW-1 HW-2 0.08 0.7 7.22 0.40 0.50% unreinforced
RT HW-1 HW-2 0.08 0.7 7.22 0.40 0.50% unreinfroced
LT 28+00 HW-1 0.13 0.7 7.22 0.66 2.90% C125
RT 28+00 HW-1 2.23 0.4 7.22 6.44 2.90% C350-Staple E
LT INT 28+00 0.14 0.7 7.22 0.71 1.50% C125
* RT INT 28+00 3.13 0.4 7.22 9.04 1.50% C350-Staple E
" Analysis attached
NorthAmricanGreen TCMDSVersion 4,3 '.4/2112009 '.10:46AM.COMPUTEDBY, JON
IPROJECT AsphaltP*t ROJECTNO:
FROM STATION/REACH: INT TO STATION/ REACH: 29.00 RAINAGE AREA: 3.13 ESIGN FREQUENCY:
HYDRAULIC RESULTS
Discharge
[cis) I Peak Flow

Period N% Velocity (fps)

_ Area (sq.lt) Hydraulic

Radiuslftl Namal

Depth lft)
L 9.0 I 01 1.48 6.09 0.60 1.42
fn-0,3001
S-0.1500
I(? gotto J
1 3.0 1 Width • ?OO It 3.0 1
Not to Scale

Reach Matting Type
Stability Analysis Vagetatim Characteristics
Permissble
Calculated
SaletyFactor
Remarks
Staple Pattern Phase Class Type Densely Shear Stress
(PSI Shear Stress
(psl)
Strayht C350 Vegetation 2 C Bunch 5075: 10.00 13.34 015 UNSTABLE
StapleE Sal Clay Loam 3.000 0.040 63.12 STABLE
`Back lalrrpul Scsa
HYDRAULIC RESULTS
Discharge
cfs Peak Flow
Period hrs Velocily (fps) Area (sq.lt) Nydlaulio
Radas Il Normal
De ft
h.1 0.1 1.20 0.92 0.26 0.55
C350 (n-0. 3001
S -0.3500
1
ottc
'w?h=3'oon11
Not to Scale

Reach Matting Type
Stability Analysis Vegetation Characteristics
Permissbb
Cbulated
a
Safety Factor
Remarks
Staple Pattern Phase Class Type Density Shear Stress
(Psi Sh
ear Stress
(PSI)
Straight C350 Vegetation 2 C Bunch 50.75% 10.00 12.07 0.83 UNSTABLE
StapleE Sod Clay Loam 3.000 0.129 23.33 STABLE
Ba-:,to11 Saee
HYDRAULIC RE TS
Discharge Peak Flow Velocity(fp,) Mee ls4ft) Hydraulic Namal
cfs Perbd hrs Radius ft De Ih ft
1.0 0.1 1.41 0.71 0.23 0.49
C350 (n-0.3001
S = 0.5750
I1
1 Bottom
Widths 0.0011 9999 UUUU
Not to Scale

Reach Matting Type
StabiGly Analysis Vegetation Characlerislics
Perrrisable
Caled
Sefely Factor
Remarks
Staple Pattern Phase Class Type Density Shear Stress
(pst) Cr SheaStress
Ipso
SlraOt C350 Vegetation 2 C Bunch 5075: 10.00 17.43 0.57 UNSTABLE
Staple E Soil Clay Loam 3.000 0.195 15.36 STABLE
Bak ? ? Irk t irPP?
North American Green-ECMDSVersion4.3 -21/2009 111 AAM OMPUTEDBY: JDH
PROJECT NAME;_.A:phait Plant PROJECT IT
FROMSTATION/REACH: 14+00 TO STATION/REACH: 15+75 DRAINAGE AREA. ,39 ESIGNFREQUENCY:
HYDRAULIC RESULTS
e(g?300)
-0
Discharge Pedc Flow Velocdy (fps) Area (sq.It) Hydraulic Namal Unenforced V1etation(n 1
cl?_ Pniod lMsl RediudOl Deorvwr
h.3 0.1 0.70 i.B5 0.37 0.79
S - 0.0750
1 Sotto 1
W' 1h=0011 9U
Not to Scale

Reach Matting Type
Stability Analysis Vegetation Characteristics
Permissible
Calculated
Safety Factor
Remarks
Staple Pattm Phase Class Type Density Shear Stress
(psi) Shear Stress
(PSI)
Straight Urrenlorced Vegetation L Bunch 50.75% 410 3.68 1.14 STABLE
Soil Clay Loam 0.050 0.006 8.39 STABLE
aeH bloc.,/ ?oer?
I
Scou?• aGe Bast Wid?k= 3 X z =
C= x,55 ?s
TZ? ra P on Scot,,. Igo ??s s l,a b?e C lass T:S /d
l so _ J
SKIMMER DESIGN
SEDIMENT BASIN #
SEDIMENT BASIN VOLUME: )4j?,0
0.2!
1000
N
SKIMMER ORIFICE DIAMETER:.-/ - 15
10000 100000, 1000000
A
SKIMMER DESIGN
SEDIMENT BASIN # Z, 3, 4
SEDIMENT BASIN VOLUME: 1128
0.2!
3
M
SKIMMER ORIFICE DIAMETER:. 7
o. ,
1000 10000 100000 1000000
LEVEL SPREADER CALCULATIONS
COATES GRADING AND HAULING-ASPHALT PLANT
JOHNSTON COUNTY, NORTH CAROLINA
JOHNSTON COUNTY
PO BOX 2263
SMITHFIELD, NC 27577
SUBMITTED BY: DEVELOPMENT CONSULTING SERVICES, INC.
1401 AVERSBORO ROAD, SUITE 206
GARNER, NC 27529
(919)'329-0051
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2
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023728
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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 INFOR ATION
Project name Coates Grading and Hauling-Asphalt Plant
Contact name Freddie Stancil
Phone number
Date
Drainage area number
13, 2009
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 14,810.00 ftz
Impervious surface area 6,65100 ftz
Percent impervious 44.92 %
Rational C coefficient 0.70
Peak flow from the 1 in/hr storm 0.24 cfs
Time of concentration min
Rainfall intensity, 10-yr storm 7.2 2 in/hr
Peak flow from the 10-yr storm 1.72 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? 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
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?
0.00 ft
50.00 ft
0.00 ft
50.00 ft
195.00 fmsl
194.00 fmsl
2.00 %
Y (Y or N)
sq ft
13 ft/cfs
N (Y or N)
Y (Y or N)
N (Y or N)
cfs
OK
Level spreader cannot be located upslope of a draw.
(Y or N) 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
23,00 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.
ft Do not complete this section of the worksheet.
CfS Do not complete this section of the worksheet
Do not complete this section of the worksheet
f
• w

'
t - --------- ) 1
---------- ?
M M

? B 1
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5
Parts I. and II. Design Summary, page 2 of 2
Z
L IL ED ITEMS: CHF;GK IST
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
Initia s Sheet No.
C-T
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.
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.
i T 3. Section view of the level spreader (1" = 20' or larger) showing:
- Underdrain system (if applicable),
Level lip,
Upslope channel, and
- Downslope filter fabric.
7 4. A date-stamped photograph of the filter strip that clearly shows the type of vegetation that is present.
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.
D44 ?l 7. A copy of the signed and notarized operation and maintenance (0&M) agreement.
NIA NfA 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
14
Permit Number:
(to be provided by DWQ)
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 roblem:
The entire filter strip Trash/debris is present. Remove the trash/debris.
system
The flow splitter device The flow splitter 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
--pair.
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 1 of 3
Y
BMP element: Potential roblem: How I will remediate the problem:
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 Oversi ht Unit at 919-733-1786.
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 2 of 3

Permit Number:
(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.
CORPOANn of/
Project name: Coates -Asphalt Plant
BMP drainage area number:
Print name:. co-,49r
ffC
Title: '5-oc- 77'rtm'S
Address: 12400 NC Hwy 50 North Willow Springs NC 27592
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.
Ce ?C i_l/I I Ck , a Notary Public for the State of
o (, County of JO V) YIS-t 1 , do hereby certify that
r?
personally appeared before me this 4
day of Imo! and acknowledge the due execution of the
forgoing filter strip, riparian buffer, and/or level spreader maintenance requirements.
Witness my hand and official seal,
` Y CE
N0 rgRy ?Z=
MY '
m Ex Pites
C_ -
%y2 A?BLIC
s ?.
000
''?/1111111\\\\
SEAL

My commission expires 3 /'?
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 3 of 3
?P
Date:/Zol?9

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y?an
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Level Spreader

7
WET DETENTION POND
COATES GRADING AND HAULING
JOHNSTON COUNTY, NORTH CAROLINA
JOHNSTON COUNTY
PO BOX 2263
SMITHFIELD, NC 27577
SUBMITTED BY: DEVELOPMENT CONSULTING SERVICES, INC.
1401 AVERSBORO ROAD, SUITE 206
GARNER, NC 27529
[phone]
?e?wl?o?°OFE??jaOl/ is'ii
b
• 023728
•
1 10 GIN .00
Pond Report
Hydraflow Hydrographs by Intelisolve Thursday, Jan 29 2009, 1:53 PM
Pond No. 1 - Asphalt Plant
Pond Data
Pond storage is based on known contour areas. Average end area m ethod used.
Stage / Storage Table
Stage (ft) Elevation (ft) Contour area (sqft) Incr. Storage (cuft) Total storage (cuft)
0.00 198.00 37,135 0 0
1.00 199.00 40,466 38,801 38,801
2.00 200.00 43,817 42,142 80,942
3.00 201.00 47,264 45,541 126,483
Culvert / Orifice Structures Weir Structures
[A] [B] [C] [D] [A] IBl [C] [D]
Rise (in) = 24.00 8.00 0.00 0.00 Crest Len (ft) = 16.00 0.00 0.00 0.00
Span (in) = 24.00 8.00 0.00 0.00 Crest El. (ft) = 200.50 0.00 0.00 0.00
No. Barrels = 1 1 0 0 Weir Coeff. = 3.33 3.33 0.00 0.00
Invert El. (ft) = 198.00 198.00 0.00 0.00 Weir Type = Riser --- --- ---
Length (ft) = 60.00 0.00 0.00 0.00 Multi-Stage = Yes No No No
Slope (%) = 1.00 0.00 0.00 0.00
N-Value = .013 .013 .000 .000
Orif. Coeff. = 0.60 0.60 0.00 0.00
Multi-Stage = n/a Yes No No Exfiltration = 0.000 in/hr (Co ntour) Ta ilwater Elev. = 0.00 ft
Note: Culvert/Orifice outflows have been analyzed under inlet and outlet control. Weir riser checked for orifice conditions.
Stage (ft)
3.00
2.00
1.00
Stage (ft)
3.00
2.00
1.00
0.00 6?_ I I _ I
0 30,000
Storage
Stage / Storage
60,000
90,000
120,000
0.00
150,000
Storage (cuft)
Asphalt Plant
STORMWATER DETENTION POND DESIGN
POND #
DRAINAGE AREA: 20.00 AC
IMPERVIOUS AREA: 9.00 AC 45.0%
RUNOFF COEFFICIENT (C)
Cpre= 0.25
Cpost= 11.00 AC x 0.25 + 9.00 AC x 1.0 = 0.59
20.00 AC
STORM DATA
STORM EVENT INTENSITY (I PRECIPITATION
DEPTH P
2 YEAR 5.76 in/hr 2.1"
10 YEAR 7.22 in/hr 3.9"
25 YEAR 9.72 in/hr 5.7"
2 YEAR STORM
10 YEAR STORM
100 YEAR STORM
Qpre=CIA= 0.25 x 5.76 x 20.00 = 28.80 cfs
Qpost=CIA= 1.09 cfs
Qpre=CIA= 0.25 x 7.22 x 20.00 = 36.10 cfs
Qpost=CIA= 1.29 cfs
Qpre=CIA= 0.25 x 9.72 x 20.00 = 48.60 cfs
Qpost=CIA= 1.55 cfs
DETERMINE SOIL STORAGE
CN= 98 x 0.5 + 55 x 0.1 + 61 x 0.4 = 79
S = 1000 -10 = 1000 -10 = 2
67"
CN 78.9 .
RUNOFF DEPTH Q* = P-0.2*S 2
(Q*) (P+0.8*S)
Q*
12 in/ft x DA x 43560 SF/AC
TIME TO PEAK (Tp) Tp=
1.39 x Qp ost
2 YEAR STORM
Q* _ (2.1 - 0.2 x 2.7 )12 = 0
58 in

(2.1 +
0.8 x 2.67) .
.
0.58 in. x 20.00 AC x 43560 SF/AC
_
Tp 12 in/ft
5
= 461
1.39 x 1.0 9 cfs .
? PEAK 1.09 cfs @ 461.5
10 YEAR STORM
Q* _ (3.9 - 0.2 x 2.7 )112 = 1
88 in

(3.9 +
0.8 x 2.67) .
.
1.88 in.

12 in/ft x 20.00 AC x 43560 SF/AC
_
Tp 1.39 x 1.29 cfs = 1265.3
? PEAK 1.29 cfs @ 1265.3
100 YEAR STORM
* _
Q (5.7 - 0.2 x 2.7 )12
40 in
= 3
(5.7 + 0.8 x 2.67) .
.
3.40 in.

12 in/ft x 20.00 AC x 43560 SF/AC
_
Tp 1.39 x 1.55 cfs = 1911.3
? PEAK 0.00 cfs @ 1911.3
ESTIMATE POND SIZE
Vpond = 126,483 cu. ft.
- -- --- - !PR ---- -- - --
202
Ili

_199 - - - o?? - - - - --- -- --- -- - - --- -- - - - - --
Zoo 9't ar.
. 3oi 4't 16.
2(0 4-
z
5
Permit No.
(to be provided by DWQ)
??? °F W A tF
? °? 9Q?
??
NCDENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part Ill) must be printed, filled out and submitted along with all of the required information.
G PROJECT INFORMATION
Project name Coates Grading & Hauling-Asphalt Hart
Contact person Michael Coates'
Phone number
Date 1/26/2009
Drainage area number #1
it.; DESIGN INFORMATION
Site Characteristics
Drainage area 871,200 ftz
Impervious area, post-development 392,040 ftz
% impervious 45.00 %
Design rainfall depth 1,0 in
Storage Volume: Non-SA Waters
Minimum volume required 103,002 ft3 OK
Volume provided 131,547 ft3
OK, volume provided is equal to or in excess of volume required.
Storage Volume: SA Waters
1.5" runoff volume
Pre-development 1-yr, 24-hr runoff
Post-development 1-yr, 24-hr runoff
Minimum volume required
Volume provided
Peak Flow Calculations
Is the pre/post control of the lyr 24hr storm peak flow required?
1-yr, 24-hr rainfall depth
Rational C, pre-development
Rational C, post-development
Rainfall intensity: 1-yr, 24-hr storm
Pre-development 1-yr, 24-hr peak flow
Post-development 1-yr, 24-hr peak flow
Pre/Post 1-yr, 24-hr peak flow control
Elevations
Temporary pool elevation
Permanent pool elevation
SHWT elevation (approx. at the perm. pool elevation)
Top of 10ft vegetated shelf elevation
Bottom of 10ft vegetated shelf elevation
Sediment cleanout, top elevation (bottom of pond)
Sediment cleanout, bottom elevation
Sediment storage provided
Is there additional volume stored above the state-required temp. pool?
Elevation of the top of the additional volume
0 ft3
ft3
ft3
0 ft3
ft3
Y (Y or N)
3.6 in
0.25 (unitless)
0.59 (unitless)
5.76 in/hr OK
28.80 ft3/sec
1.09 ft3lsec
-27.71 ft3lsec
201,00 fmsl
198.00 fmsl
fmsl
199,00 fmsl
198.00 fmsl Data not needed for calculation option #1, but OK if provided.
196.00 fmsl
195.00 fmsl Data not needed for calculation option #1, but OK if provided.
1.00 ft
Y (Y or N)
201.0 fmsl OK
Form SW401-Wet Detention Basin-Rev.5 Parts 1. & II. Design Summary, Page 1 of 2
Permit
(to be provided by DWQ)
IL DESIGN INFORMATION
Surface Areas
Area, temporary pool 91,081 ft2
Area REQUIRED, permanent pool 20,299 ft2
SA/DA ratio 1),31).

Area PROVIDED, permanent pool, APerm_Pool junttless)
37,135 ft2
OK
Area, bottom of 1 Oft vegetated shelf, Abo, a,, 37,135 ft2
Area, sediment cleanout, top elevation (bottom of pond), Abot_pond 23,577 ft2
Volumes
Volume, temporary pool 131,547 ft3 OK
Volume, permanent pool, Vperm pW 56,228 ft3
Volume, forebay (sum of forebays if more than one forebay) ft3
Forebay % of permanent pool volume %
SA/DA Table Data
Design TSS removal 85 %
Coastal SA/DA Table Used? N (Y or N)
Mountain/Piedmont SA/DA Table Used? Y `(Y or N)
SA/DA ratio 2.33 (unitless)
Average depth (used in SA/DA table):
Calculation option 1 used? (See Figure 10-2b) Y (Y or N)
Volume, permanent pool, Vpefmyod 56,228 ft3 OK
Area provided, permanent pool, Apermyoal 37,135 ft2 OK
Average depth calculated 1.51 ft OK
Average depth used in SA/DA, day, (Round to nearest 0.5ft) 1.5 ft OK
Calculation option 2 used? (See Figure 10-2b) tJ (Y or N)
Area provided, permanent pool, Aperm_pod ft2
Area, bottom of 1 Oft vegetated shelf, Abot shelf ft2
Area, sediment cleanout, top elevation (bottom of pond), Abot-pond ft2
"Depth" (distance b/w bottom of 1Oft shelf and top of sediment) ft
Average depth calculated ft
Average depth used in SA/DA, da,„ (Round to nearest 0.5ft) ft
Drawdown Calculations
Drawdown through orifice?
Diameter of orifice (if circular)
Area of orifice (if-non-circular)
Coefficient of discharge (CD)
Driving head (Ho)
Drawdown through weir?
Weir type
Coefficient of discharge (C,,)
Length of weir (L)
Driving head (H)
Pre-development 1-yr, 24-hr peak flow
Post-development 1-yr, 24-hr peak flow
Storage volume discharge rate (through discharge orifice or weir)
Storage volume drawdown time
Additional Information
Vegetated side slopes
Vegetated shelf slope
Vegetated shelf width
Length of flowpath to width ratio
Length to width ratio
Trash rack for overflow & orifice?
Freeboard provided
Vegetated filter provided?
Recorded drainage easement provided?
Capures all runoff at ultimate build-out?
Drain mechanism for maintenance or emergencies
N (Y or N)
in
in2
(unitless)
It
Y (Y or N)
Riser (unitless)
3,33 (unitless)
16 ft
ft
28,80 ft3lsec
1.09 ft3lsec
1,55 ft3/sec
2.00 days
Insufficient pre-development peak flow.
OK
OK, draws down in 2-5 days.
#DIV/0!
3 :1 OK
10 :1 OK
10.0 ft
:1 OK
:1
Y (Y or N)
OK
1.0 ft OK
Y (Y or N) OK
Y (Y or N) OK
Y (Y or N) OK
Emergency Spillway
Form SW401-Wet Detention Basin-Rev.5 Parts I. & II, Design Summary, Page 2 of 2
Permit No.
(to be provided by DWQ)
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.
JDH C-3 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),
- Basin dimensions,
- Pretreatment system,
- High flow bypass system,
- Maintenance access,
- Proposed drainage easement and public right of way (ROW),
- Overflow device, and
- Boundaries of drainage easement.
JDH C-3 2. Partial plan (1" = 30' or larger) and details for the wet detention basin showing:
- Outlet structure with trash rack or similar,
- Maintenance access,
- Permanent pool dimensions,
- Forebay and main pond with hardened emergency spillway,
- Basin cross-section,
- Vegetation specification for planting shelf, and
- Filter strip.
JDH C-3 3. Section view of the wet detention basin 0" = 20' or larger) showing:
Side slopes, 3:1 or lower,
Pretreatment and treatment areas, and
Inlet and outlet structures.
JDH C-3 4. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified
on the plans prior to use as a wet detention basin.
JDH 14 5. A table of elevations, areas, incremental volumes & accumulated volumes for overall pond and for forebay,
to verify volume provided.
JDH C-3 6. A construction sequence that shows how the wet detention basin will be protected from sediment until the
entire drainage area is stabilized.
JDH #124114 7. The supporting calculations.
JDH Enclosed 8. A copy of the signed and notarized operation and maintenance (0&M) agreement.
JDH NIA 9. A copy of the deed restrictions (if required).
JDH 11 10. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. County
soil maps are not an acceptable source of soils information.
Form SW401-Wet Detention Basin-Rev.5 Part III. Required Items Checklist, Page 1 of 1
Permit Number:
(to be provided by DWQ)
Drainage Area Number:
Wet Detention Basin 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.
The wet detention basin system is defined as the wet detention basin,
pretreatment including forebays and the vegetated filter if one is provided.
This system (check one):
? does ® does not incorporate a vegetated filter at the outlet.
This system (check one):
? does ® does not incorporate pretreatment other than a forebay.
Important maintenance procedures:
Immediately after the wet detention basin is established, the plants on the
vegetated shelf and perimeter of the basin should be watered twice weekly if
needed, until the plants become established (commonly six weeks).
No portion of the wet detention pond should be fertilized after the first initial
fertilization that is required to establish the plants on the vegetated shelf.
Stable groundcover should be maintained in the drainage area to reduce the
sediment load to the wet detention basin.
If the basin must be drained for an emergency or to perform maintenance, the
flushing of sediment through the emergency drain should be minimized to the
maximum extent practical.
- Once a year, a dam safety expert should inspect the embankment.
After the wet detention pond is established, it should be inspected once a month and
within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a
Coastal County). Records of operation and maintenance should be kept in a known set
location and must 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 BMP Trash debris is resent. Remove the trash debris.
The perimeter of the wet Areas of bare soil and/or Regrade the soil if necessary to
detention basin 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.
Vegetation is too short or too Maintain vegetation at a height of
Ion a roximatel six inches.
Form SW401-Wet Detention Basin O&M-Rev.4 Page 1 of 4
Permit Number:
(to be provided by DWQ)
Drainage Area Number:
BMP element: Potential problem: How I will remediate the problem:
The inlet device: pipe or The pipe is clogged. Unclog the pipe. Dispose of the
swale sediment off-site.
The pipe is cracked or Replace the pipe.
otherwise damaged.
Erosion is occurring in the Regrade the swale if necessary to
swale. smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
The forebay Sediment has accumulated to Search for the source of the
a depth greater than the sediment and remedy the problem if
original design depth for possible. Remove the sediment and
sediment storage. dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Erosion has occurred. Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
Weeds are present. Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying.
The vegetated shelf Best professional practices Prune according to best professional
show that pruning is needed practices
to maintain optimal plant
health.
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 to establish the
ground cover if a soil test indicates
it is necessary.
Weeds are present. Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying.
The main treatment area Sediment has accumulated to Search for the source of the
a depth greater than the sediment and remedy the problem if
original design sediment possible. Remove the sediment and
storage depth. dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Algal growth covers over Consult a professional to remove
50% of the area. and control the algal growth.
Cattails, phragmites or other Remove the plants by wiping them
invasive plants cover 50% of with pesticide (do not spray).
the basin surface.
Form SW401-Wet Detention Basin O&M-Rev.4 Page 2 of 4
Permit Number:
(to be provided by DWQ)
Drainage Area Number:
BMP element: Potential problem: How I will remediate the problem:
The embankment Shrubs have started to grow Remove shrubs immediately.
on the embankment.
Evidence of muskrat or Use traps to remove muskrats and
beaver activity is present. consult a professional to remove
beavers.
A tree has started to grow on Consult a dam safety specialist to
the embankment. remove the tree.
An annual inspection by an Make all needed repairs.
appropriate professional
shows that the embankment
needs repair. if applicable)
The outlet device Clogging has occurred. Clean out the outlet device. Dispose
of the sediment off-site.
The outlet device is damaged Repair or replace the outlet device.
The receiving water Erosion or other signs of Contact the local NC Division of
damage have occurred at the Water Quality Regional Office, or
outlet. the 401 Oversight Unit at 919-733-
1786.
The measuring device used to determine the sediment elevation shall be such
that it will give an accurate depth reading and not readily penetrate into
accumulated sediments.
When the permanent pool depth reads 198 feet in the main pond, the sediment
shall be removed.
When the permanent pool depth reads _N/A feet in the forebay, the sediment
shall be removed.
BASIN DIAGRAM
(fill in the blanks)
Sediment Removal
Bottom
0 Permanent Pool Elevation 198
Pe maven Pool
-------------- -- Volume Sediment Removal Elevation 196 Volume
-ft Min. -------------------------------------------- -
Sediment Bottom Elevation 195 1-ft n
Storage Sedimei
FOREBAY MAIN POND Storage
Form SW401-Wet Detention Basin O&M-Rev.4 Page 3 of 4
Permit Number:
(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.
Co 4ROAAT-Io AJ
Project name:Coates dia-ding ,-Asphalt Plant
BMP drainage area number:#1
Co2AIO JN-nor/
Print name:Michael Coates-Coates
Title:Developer
Address: 12400 NC 50 N Willow Springs NC 27592
Phone:
Signati
Date:
Note: The legally responsible party should not be a homeowners association unless more than 50% of
the lots have been sold and a resident of the subdivision has been named the president.
1, 13 re 0 q G21 J-eryl 1,40 V , a Notary Public for the State of
110r ? h Cm vo hh (l , County of Tj h h,S*r1 , do hereby certify that
V CA (i e i cncl C S personally appeared before me this -24P4",?
day of J-d 10 u a I-, Z009 , and acknowledge the due execution of the
forgoing wet detention basin maintenance requirements. Witness my hand and official
seal,
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SEAL 1
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My commission expires / ? v2 3
Form SW401-Wet Detention Basin O&M-Rev.4 Page 4 of 4
1I 2e, (a1