20061151 Ver 4_Stormwater Info_20111010

Dennison, Laurie h ? ( U q
From: Lucas, Annette
Sent: Thursday, October 06, 2011 7:49 PM
To: Strickland, Bev; Dennison, Laurie
Subject: FW: Town of Apex - Buffer Authorization for Peakway Project
FYI - the copies for Apex Peakway will come in separate envelopes. Thanks - A
From: Adam Stephenson [[e-mail]]
Sent: Thursday, October 06, 20114:56 PM
To: Lucas, Annette
Subject: RE: Town of Apex - Buffer Authorization for Peakway Project
I just put the hard copies in the mail. FYI-the total package exceeded the maximum weight allowed by the postal service
for a large envelope, so I mailed each copy separately. The cover sheets will say "l of 3", "2 of 3", and "3 of 3".
From: Lucas, Annette [mailto:annette.lucas(s?ncdenr.gov]
Sent: Thursday, October 06, 2011 11:06 AM
To: Adam Stephenson
Cc: Chapman, Amy; Michael Deaton
Subject: RE: Town of Apex - Buffer Authorization for Peakway Project
Adam,
You will need to send three hard copies of all of the information to me at the address below. I will do my best to
expedite the review after I receive it.
Thanks,
Annette
Annette M. Lucas, PE
Environmental Engineer
NCDENR DWQ Wetlands and Stormwater Branch
1650 Mail Service Center, Raleigh, NC 27699-1650 (Mail)
512 N. Salisbury St, Raleigh, NC 27604 911, Floor (l,ocwion e, 11?arcx ls)
Phone: [phone] Fax: [phone] Email:
Website: http://portal.ncdenr.org/web/wq/swp/ws/401
?A Before printing this email, please consider your budget and the environment.
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to
third parties.
From: Adam Stephenson fmailto:Adam.Stephenson (a)apexnc.org]
Sent: Thursday, August 04, 20115:00 PM
To: Lucas, Annette
1
Cc: Chapman, Amy; Michael Deaton
Subject: Town of Apex - Buffer Authorization for Peakway Project
Please see the attached documents regarding the level spreaders and bypass channels for the Peakway project. Let me
know if you need any additional information.
• PCN Application for buffer encroachment with bypass channels
• LS-VFS Supplement
• Calculations for level spreaders, channels, and flow splitter discharge pipes
• Operation & Maintenance Agreement
• Plan Sheets (2)
Adam Stephenson, PE, CFM
Senior Engineer - Town of Apex
919-249-3417
From: Chapman, Amy [mailto:amy.chapman(a)ncdenrgov]
Sent: Thursday, May 12, 2011 1:35 PM
To: Michael Deaton
Cc: Lucas, Annette
Subject: level spreader bypass permit
Hi Mike!
I got your voicemail just now and thought I'd clear up the issues through email since I'm out of the office right now.
I've copied Annette on this email to add anything as needed.
For the level spreader bypass at the Shephard's Vineyard project will require a buffer authorization via the PCN form.
There is no application fee.
You'll need to attach the calcs, drawings and worksheet for the level spreader so Annette can see it's designed correctly
to discharge to the bypass and we'll need to have an 0&M agreement for the bypass as well as calcs and designs for it.
The worksheets and 0&M agreement can be downloaded from this website:
http://Portal.ncdenr.org/web/wq/ws/su/bmp-ch8
Please let me know if you need anything else.
-Amy

Adam Stephenson [COPY #1 OF 31
Subject: RE: Town of Apex - Buffer Authorization for Peakway Project
Please find enclosed the following documents (3 copies) regarding the level spreaders and bypass channels for the
Peakway project.
• PCN Application for buffer encroachment with bypass channels
• LS-VFS Supplement
• Calculations for level spreaders, channels, and flow splitter discharge pipes
• Operation & Maintenance Agreement
• Plan Sheets (2)
Adam Stephenson, PE, CFM
Senior Engineer - Town of Apex
919-249-3417
From: Lucas, Annette [mailto:[e-mail]
Sent: Thursday, October 06, 2011 11:06 AM
To: Adam Stephenson
Cc: Chapman, Amy; Michael Deaton
Subject: RE: Town of Apex - Buffer Authorization for Peakway Project
Adam,
You will need to send three hard copies of all of the information to me at the address below. I will do my best to
expedite the review after I receive it.
Thanks,
Annette
U(_4.f ls...?
Annette M. Lucas, PE UENR-WATER OUALI"ty
Environmental Engineer WETLANDS AND STORMWATER BRANCH
NCDENR I DWQ I Wetlands and Stormwater Branch
1650 Mail Service Center, Raleigh, NC 27699-1650 (Mail)
512 N. Salisbury St, Raleigh, NC 27604 91h Floor (Location Fir, Parcels)
Phone: [phone] Fax: [phone] Email: Annette.Lucas0 ricdenngov
Website: http://Portal.ncdenr.org/web/wq/swp/ws/401
`,A Before printing this email, please consider your budget and the environment.
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to
third parties.
From: Adam Stephenson LmaiIto: Adam. Stephenson(c?apexnc.orgl
Sent: Thursday, August 04, 20115:00 PM
To: Lucas, Annette
Cc: Chapman, Amy; Michael Deaton
Subject: Town of Apex - Buffer Authorization for Peakway Project
Please see the attached documents regarding the level spreaders and bypass channels for the Peakway project. Let me
know if you need any additional information.
• PCN Application for buffer encroachment with bypass channels
• LS-VFS Supplement
• Calculations for level spreaders, channels, and flow splitter discharge pipes
• Operation & Maintenance Agreement
• Plan Sheets (2)
Adam Stephenson, PE, CFM
Senior Engineer - Town of Apex
919-249-3417
oLV-1\Sk vy
c? ?r
Office Use Only:
Corps action ID no.
DWQ project no.
Form Version 1.4 January 2009
Pre-Construction Notification (PCN) Form
A. Applicant Information
1. Processing
1 a. Type(s) of approval sought from the Corps: ?X Section 404 Permit ? Section 10 Permit
1b. Specify Nationwide Permit (NWP) number: 14 or General Permit (GP) number:
1 c. 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):
? 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 ?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 ?X No
1 h. Is the project located within a NC DCM Area of Environmental Concern (AEC)? ? Yes ?X No
2. Project Information
2a. Name of project: Apex Peakway
2b. County: Wake
2c. Nearest municipality / town: Apex
2d. Subdivision name:
2e. NCDOT only, T.I.P. or state project no:
3. Owner Information
3a. Name(s) on Recorded Deed: Shepherd's Vineyard Community
3b. Deed Book and Page No. DB 06375 PG 0140
3c. Responsible Party (for LLC if
applicable): John Sperath
3d. Street address: 3600 Glenwood Ave, Suite 150
3e. City, state, zip: Raleigh, NC 27612-4669
3f. Telephone no.: 919-303-0758
3g. Fax no.: 866-546-0480
3h. Email address: [e-mail]
Page 1 of 10
PCN Form - Version 1.4 January 2009
4. Applicant Information (if different from owner)
4a. Applicant is: ?X Agent ? Other, specify:
4b. Name: Adam Stephenson
4c. Business name
(if applicable): Town of Apex
4d. Street address: 73 Hunter Street
4e. City, state, zip: Apex, NC
4f. Telephone no.: 919-249-3417
4g. Fax no.: 919-249-3416
4h. Email address: [e-mail]
5. Agent/Consultant Information (if applicable)
5a. Name:
5b. Business name
(if applicable):
5c. Street address:
5d. City, state, zip:
5e. Telephone no.:
5f. Fax no.:
5g. Email address:
Page 2 of 10
B. Project Information and Prior Project History
1. Property Identification
1a. Property identification no. (tax PIN or parcel ID): 0742-73-2130
1 b. Site coordinates (in decimal degrees): Latitude: 35.7367 Longitude: -78.8412
1 c. Property size: 1.26 acres
2. Surface Waters
2a. Name of nearest body of water to proposed project: Williams Creek
2b. Water Quality Classification of nearest receiving water:
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 project site is a mixture of residential and commercial development, with a Food Lion on the upstream side and a residential subdivision on the
downstream side of the project.
3b. List the total estimated acreage of all existing wetlands on the property: 0.22
3c. List the total estimated linear feet of all existing streams (intermittent and perennial) on the property: 454
3d. Explain the purpose of the proposed project:
The purpose of the proposed project is to complete a section of the Apex Peakway roadway which is included in the Town of Apex
Transportation Plan and is necessary to accommodate future traffic demands especially from the Trackside Development.
3e. Describe the overall project in detail, including the type of equipment to be used:
The project consists of a 0.22 mile long section of 2-lane roadway with curb and gutter and auxiliary lanes with a 100 feet right-of-way to be
constructed using standard roadway construction equipment.
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? ?X Yes ? No ? Unknown

Comments:
4b. If the Corps made the jurisdictional determination, what type
of determination was made?
? Preliminary ?X Final
4c. If yes, who delineated the jurisdictional areas?
Name (if known): SunTemple Helgren Agency/Consultant Company: Wilbur Smith Associates
Other:
4d. If yes, list the dates of the Corps jurisdictional determinations or State determinations and attach documentation.
January 29, 2009
See attachment.
5. Project History
5a. Have permits or certifications been requested or obtained for
this project (including all prior phases) in the past? ?x Yes ? No ? Unknown
5b. If yes, explain in detail according to "help file" instructions.
Action ID: 200801457; DWQ Project # 06-1151, Ver. 2
6. Future Project Plans
6a. Is this a phased project? ? Yes ? 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.
Wetland impact
number
Permanent (P) or
Temporary T 2b.
Type of impact 2c.
Type of wetland 2d.
Forested 2e.
Type of jurisdiction
Corps (404,10) or
DWQ (401, other) 2f.
Area of
impact
(acres)
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.
Stream impact
number
Permanent (P) or
Temporary (T) 3b.
Type of impact 3c.
Stream name 3d.
Perennial (PER) or
intermittent (INT)? 3e.
Type of
jurisdiction 3f.
Average
stream
width
(feet) 3g.
Impact
length
(linear
feet)
S1 - Choose one
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.
Open water
impact number
Permanent (P) or
Temporary T 4b.
Name of waterbody
(if applicable) 4c.

Type of impact 4d.

Waterbody
type 4e.

Area of impact (acres)
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.
Pond ID number 5b.
Proposed use or
purpose of pond 5c.
Wetland Impacts (acres) 5d.
Stream Impacts (feet) 5e.
Upland
(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 miti ation, then ou MUST fill out Section D of this form.
6a. Project is in which protected basin? OX Neuse F] Tar-Pamlico ? Catawba 0 Randleman ? Other:
6b.
Buffer Impact
number -
Permanent (P) or
Temporary T 6c.
Reason for impact 6d.
Stream name 6e.
Buffer
mitigation
required? 6f.
Zone 1
impact
(square
feet 6g.
Zone 2
impact
(square
feet
B1 P flow bypass channel UT Williams Creek No 246 146
B2 P flow bypass channel UT Williams Creek No 314 163
B3 P flow bypass channel UT Williams Creek No 189 127
B4 Yes/No
B5 Yes/No
B6 - Yes/No
6h. Total Buffer Impacts: 749 436
6i. Comments:
Page 5 of 10
D. Impact Justification and Mitigation
1. Avoidance and Minimization
1a. Specifically describe measures taken to avoid or minimize the proposed impacts in designing project.
The impacts are unavoidable due to the flow bypass system for level spreaders with vegetative filter strips required by the NCDENR Stormwater BMP
Manual, Chapter 8, Section 8.3.3.
1b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques.
The bypass channel will enter the stream at an angle rather than perpendicular.
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

E] 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 X
? Yes No
buffer mitigation?
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.
6c. 6d. 6e.
Zone Reason for impact Total impact Multiplier Required mitigation
(square feet) (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 0 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.
?X Yes ? No
2. Stormwater Management Plan
2a. What is the overall percent imperviousness of this project? 43%
2b. Does this project require a Stormwater Management Plan? ? Yes ?X No
2c. If this project DOES NOT require a Stormwater Management Plan, explain why:
Linear roadway projects undertaken by local governments are exempt per previous correspondence from DWQ to Town of Apex.
2d. If this project DOES require a Stormwater Management Plan, then provide a brief, narrative description of the plan:
N/A
2e. Who will be responsible for the review of the Stormwater Management Plan? N/A
3. Certified Local Government Stormwater Review
3a. In which local government's jurisdiction is this project? N/A
? Phase II
3b. Which of the following locally-implemented stormwater management programs ? NSW
apply (check all that apply): ? USMP
? 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 ? Yes ? No
attached?
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? ? Yes ? No
Page 8 of 10
PCN Form - Version 1.4 January 2009
F. Supplementary Information
1. Environmental Documentation (DWQ Requirement)
1a. Does the project involve an expenditure of public (federal/state/local) funds or the ?X Yes ? 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 ?X 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.) N/A ?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 ?X No
or Riparian Buffer Rules (15A NCAC 2B .0200)?
2b. Is this an after-the-fact permit application? ?Yes ?X No
2c. If you answered "yes" to one or both of the above questions, provide an explanation of the violation(s):
N/A
3. Cumulative Impacts (DWQ Requirement)
3a. Will this project (based on past and reasonably anticipated future impacts) result in ?Yes ?X 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.
N/A (This application is only for level spreader flow bypass encroachment in buffer. Wetland and stream impacts covered under previous permit. See
B.5. Project History.)
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.
N/A
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
? Yes ?X No
habitat?
5b. Have you checked with the USFWS concerning Endangered Species Act ? Yes ? No
impacts?
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?
NC Natural Heritage Program - Heritage Data
http://nhpweb.enr.state.nc.us/public/virtual-workroom.phtml
6. Essential Fish Habitat (Corps Requirement)
6a. Will this project occur in or near an area designated as essential fish habitat? F ? Yes ?X No
6b. What data sources did you use to determine whether your site would impact Essential Fish Habitat?
NOAA Fisheries - Essential Fish Habitat Mapper
http://sharpfi n. n mfs. n oaa.gov/website/E FH_Mapper/ma p. aspx
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 ?X 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?
National Park Service - National Register of Historic Places
http://nrhp.focus.nps.gov/
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:
N/A
8c. What source(s) did you use to make the floodplain determination?
FEMA Flood Insurance Rate Map (FIRM)
Adam Stephenson / --??
-- 08-04-11
Applicant/Agent's Printed Name Applica
gen Signature Date
(Agent's signature is valid only if an authorization
letter from the applicant is provided.)
Page 10 of 10
U.S. ARMY CORPS OF ENGINEERS
WILMINGTON DISTRICT
Action ID. 200801457 County: Wake USGS Quad: Apex, NC
GENERAL PERMIT (REGIONAL AND NATIONWIDE) VERIFICATION
Property Owner / Authorized Agent: Town of A ex
Address: Attn: Russell Dalton
PO Box 250
Apex, NC 27502
Telephone No.: 919-248-3400
Size and location of property (water body, road name/number, town, etc.): the Apex Peakwav project site is 0.75 miles
long and begins at N Salem Street and terminates at the existing Apex Peakwav, in Apex. Wake County, North
Carolina.
Description of projects area and activity: This permit verifies permanent impacts to 0.51 acres of wetlands and 389 if
of stream channel due to two single and comDlete road crossings associated with the construction of Apex
Peakwav. Mitigation. at a 1:1 ratio is required for the stream impacts and at a 2:1 ration is required for the
wetlands impacts (see Permit Condition below)_
Applicable Law: ® Section 404 (Clean Water Act, 33 USC 1344)
? Section 10 (Rivers and Harbors Act, 33 USC 403)
Authorization: Regional General Permit Number:
Nationwide Permit Number: 14
Your work is authorized by the above referenced permit provided it is accomplished in strict accordance with the attached
conditions and your submitted plans. Any violation of the attached conditions or deviation from your submitted plans may subject the
permittee to a stop work order, a restoration order and/or appropriate legal action.
This verification will remain valid until the expiration date identified below unless the nationwide authorization is modified,
suspended or revoked. If, prior to the expiration date identified below, the nationwide permit authorization is reissued and/or
modified, this verification will remain valid until the expiration date identified below, provided it complies with all requirements of
the modified nationwide permit. If the nationwide permit authorization expires or is suspended, revoked, or is modified, such that the
activity would no longer comply with the terms and conditions of the nationwide permit, activities which have commenced (i.e., are
under construction) or are under contract to commence in reliance upon the nationwide permit, will remain authorized provided the
activity is completed within twelve months of the date of the nationwide permit's expiration, modification or revocation, unless
discretionary authority has been exercised on a case-by-case basis to modify, suspend or revoke the authorization.
Activities subject to Section 404 (as indicated above) may also require an individual Section 401 Water Quality Certification. You
should contact the NC Division of Water Quality (telephone [phone]) to determine Section 401 requirements.
For activities occurring within the twenty coastal counties subject to regulation under the Coastal Area Management Act (CAMA),
prior to beginning work you must contact the N.C. Division of Coastal Management.
This Department of the Army verification does not relieve the permittee of the responsibility to obtain any other required Federal,
State or local approvals/permits.
If there are any questions regarding'this verification, any of the conditions of the Permit, or the Corps of Engineers regulatory
program, please contact Crystal Amschler.
Permit Condition: In order to compensate for impacts to 389 If of warm water stream, the permittee shall make payment to the
Forrest Creek Mitigation Bank in the amount determined by the Forrest Creek Mitigation Bank, sufficient to perform the restoration of
3891f of warm water stream in the Neuse River Basin, Cataloging Unit 03020201.
In order to compensate for impacts to 0.51 acres of riparian wetlands 389 linear feet of warm water stream the permittee shall make
payment to the North Carolina Ecosystem Enhancement Program (NC EEP) in the amount determined by the NC EEP, sufficient to
perform the restoration of 1.02 acres of riparian wetlands in the Neuse River Basin, Cataloging Unit 03020201.
Construction within jurisdictional areas on the property shall begin only after the permittee has made full payment to the NC EEP and
Forrest Creek Mitigation Bank and provided a copy of the payment documentation to the Corps, and the NC EEP has provided written
confirmation to the Corps that it agrees to accept responsibility for the mitigation work required, in compliance with the MOU
Page 1 of 3
between the North Carolina Department of Environment and Natural Resources and the United States Army Corps of Engineers,
Wilmington District, dated November 4, 1998.
"Note: Habitat type may be described as found in Schafale and Weakley, Classification of the Natural
Communities of North Carolina, Third Approximation, 1990; or in accordance with Cowardin, et at (1979), Classification of Wetlands
and Deepwater Habitats of the of the United States"
Corps Regulatory Official: Date: January 29.2009
Expiration Date of Verification: January 29, 2011
The Wilmington District is committed to providing the highest level of support to the public. To help us ensure we continue to do so,
please complete the attached customer Satisfaction Survey or visit http://www,saw,usace-army.mil/WETLANDS/index.htm] to
complete the survey online.
Page 2 of 3
Determination of Jurisdiction:
? Based on preliminary information, there appear to be waters of the US including wetlands within the above described project area.
This preliminary determination is not an appealable action under the Regulatory Program Administrative Appeal Process
( Reference 33 CFR Part 331).
? There are Navigable Waters of the United States within the above described project area subject to the permit requirements of
Section 10 of the Rivers and Harbors Act and Section 404 of the Clean Water Act. Unless there is a change in the law or our
published regulations, this determination may be relied upon for a period not to exceed five years from the date of this
notification.
® There are waters of the US and/or wetlands within the above described project area subject to the permit requirements of Section
404 of the Clean Water Act (C WA)(33 USC § 1344). Unless there is a change in the law or our published regulations, this
determination may be relied upon for a period not to exceed five years from the date of this notification.
? The jurisdictional areas within the above described project area have been identified under a previous action. Please reference
jurisdictional determination issued . Action 1D
Basis of Jurisdictional Determination: Wetlands were determined using the Corns 1987 delineation manual. Streams were
Corps Regulatory Official:
Date January 29, 2009
SURVEY PLATS, FIELD SKETCH, WETLAND DELINEATION FORMS, PROJECT PLANS, ETC., MUST BE
ATTACHED TO THE FILE COPY OF THIS FORM, IF REQUIRED OR AVAILABLE.
Copy Furnished:
Wilbur Smith Associates
Attn: SunTemple Helgren
412 Fayetteville Street, Suite 1303
Raleigh, NC 27601
919-755-0583
Page 3 of 3
ANA
NCDENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER - VEGETATED FILTER STRIP (LS-VFS) SUPPLEMENT
This form must be completely filled out, printed, initialed, and submitted.
I. PROJECT INFORMATION
Project name Apex Peakway North
Contact name Adam Stephenson
Phone number 249-3417
Date August 4, 2011
Drainage area number A
I1. DESIGN INFORMATION
The purpose of the LS-VFS Buffer Rule: Diffuse Flow
Stormwater enters LS-VFS from The drainage area
Type of VFS Engineered filter strip (graded & sodded, slope < 8%)
Explanation of any "Other' responses above
If Stormwater Enters the LS-VFS from the Drainage Area
Drainage area 14,810 ftz
Impervious surface area 12,197 f 2
Percent impervious 82.36 %
Rational C coefficient 0.81
Peak flow from the 1 in/hr storm 0.28 cfs
Time of concentration 5.00 min
Rainfall intensity, 10-yr storm 7.22 in/hr
Peak flow from the 10-yr storm 1.99 cfs
Design storm 1 inch/hour storm
Maximum amount of flow directed to the LS-VFS 0.28 cfs
Is a flow bypass system going to be used? Y (Y or N)
Explanation of any "Other' responses above
If Stormwater Enters the LS-VFS from a BMP Do not complete this section of the form.
Type of BMP
Peak discharge from the BMP during the design storm cfs
Peak discharge from the BMP during the 10-year storm cfs Do not complete this section of the form.
Maximum capacity of a 100-foot long LS-VFS 10 cfs
Peak flow directed to the LS-VFS cfs Do not complete this section of the form,
Is a flow bypass system going to be used? (Y or N)
Explanation of any "Other' responses above
LS-VFS Design
Forebay surface area sq ft
Depth of forebay at stormwater entry point in
Depth of forebay at stormwater exit point in
Feet of level lip needed per cfs 10 ftlcfs
Computed minimum length of the level lip needed 3 ft Ten feet is the minimum level spreader length.
Length of level lip provided 10 ft
Form SW401 - LS-VFS - 27Ju12011 - Rev.9 page 1 of 9
Width of VFS
Elevation at downslope base of level lip
Elevation at the end of the VFS that is farthest from the LS
Slope (from level lip to the end of the VFS)
Are any draws present in the VFS?
Is there a collector swale at the end of the VFS?
Bypass System Design (if applicable)
Is a bypass system provided?
Is there an engineered flow splitting device?
Dimensions of the channel (see diagram below):
M
B
W
y (flow depth for 10-year storm)
freeboard (during the 10-year storm)
Peak velocity in the channel during the 10-yr storm
Channel lining material
Does the bypass discharge through a wetland?
Does the channel enter the stream at an angle?
Explanation of any "Other" responses above
30 ft
468.02 fmsl
466.37 fmsl
5.50 %
N (Y or N) GK
N (Y or N)
Y (Y or N)
Y (Y or N) Please provide plan details of flow splider & supporting calcs.
2.00 ft
1.00 ft
7.00 ft
0.25 ft
1.25 ft
5.24 ft/sec
Pick one:
N (YorN)
Y (Y or N)
W
? R
III. REQUIRED ITEMS CHECKLIST
EDIT 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.
Requried Item:
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.
Initials Page or plan sheet number and any notes:
AS -Maintenance access is via the roadway side slope
-See Sheet 1 of 2
I
Form SW401 - LS-VFS - 27Jul2011 - Rev.9 page 2 of 9

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.
3. Section view of the level spreader (1" = 20' or larger) showing:
- Underdrain system (if applicable),
Level lip,
Upslope channel, and
Downslope filter fabric.
4. Plan details of the flow splitting device and supporting calculations (if applicable).
5. A construction sequence that shows how the level spreader will be protected from
sediment until the entire drainage area is stabilized.
6. If a non-engineered VFS is being used, then provide a photograph of the VFS showing
that no draws are present.
7. The supporting calculations.
8. A copy of the signed and notarized operation and maintenance (0&M) agreement.
AS -See Sheet 2 of 2
_14&_.__ -See Sheet 2 of 2
-See Sheet 2 of 2
A_,S_ -See Sheet 2 of 3
AS !-See "Level Spreader & Flow Bypass Calculations for Peakway Project"
_$,_ -Attached
Form SW401 - LS-VFS - 27Ju12011 - Rev.9 page 3 of 9

NCDENR
STORMWATER MA NAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER - VEGETATED FILTER STRIP (LS-VFS) SUPPLEMENT
This form must be completely filled out, printed, initialed, and submitted.
1. PROJECT INFORMATION
Project name Apex Peakway North
Contact name Adam Stephenson
Phone number 249-3417
Date August 4, 2011
Drainage area number B
II. DESIGN INFORMATION
The purpose of the LS-VFS Butter Rule: Diffuse Flow
Stormwater enters LS-VFS from The drainage area
Type of VFS Engineered filter strip (graded & sodded, slope < 8%)
Explanation of any "Other" responses above
If Stormwater Enters the LS-VFS from the Drainage Area
Drainage area 41,382 ftz
Impervious surface area 33,541 ff
Percent impervious 81.05 %
Rational C coefficient 0.80
Peak flow from the 1 in/hr storm 0.76 cfs
Time of concentration 5.00 min
Rainfall intensity, 10-yr storm 7.22 in/hr
Peak flow from the 10-yr storm 5.49 cfs
Design storm 1 inch/hour storm
Maximum amount of flow directed to the LS-VFS 0.76 cfs
Is a flow bypass system going to be used? Y (Y or N)
Explanation of any "Other" responses above
If Stormwater Enters the LS-VFS from a BMP Do not complete section of the form.
Type of BMP
Peak discharge from the BMP during the design storm cfs
Peak discharge from the BMP during the 10-year storm cfs Do not complete this section of the form.
Maximum capacity of a 100-foot long LS-VFS 10 cfs
Peak flow directed to the LS-VFS cfs Do not complete this section of the form.
Is a flow bypass system going to be used? (Y or N)
Explanation of any "Other" responses above
LS-VFS Design
Forebay surface area sg ft
Depth of forebay at stormwater entry point in
Depth of forebay at stormwater exit point in
Feet of level lip needed per cfs 10 fucfs
Computed minimum length of the level lip needed 8 ft Ten feet is the minimum level spreader length.
Length of level lip provided 10ft
Form SW401 - LS-VFS - 27Ju12011 - Rev.9 page 4 of 9
Width of VFS 30 ft
Elevation at downslope base of level lip 458.35 fmsl
Elevation at the end of the VFS that is farthest from the LS 457.36 fmsl
Slope (from level lip to the end of the VFS) 3.30 %
Are any draws present in the VFS? N (Y or N)
Is there a collector swale at the end of the VFS? N (Y or N)
Bypass System Design (if applicable)
Is a bypass system provided? Y (Y or N)
Is there an engineered flow splitting device? Y (Y or N)
Dimensions of the channel (see diagram below):
M 2.00 ft
B 1.00 ft
W 8.00 ft
y (flow depth for 10-year storm) 0.60 ft
freeboard (during the 10-year storm) 1.20 ft
Peak velocity in the channel during the 10-yr storm 4.66 ft/sec
Channel lining material Pick one:
Does the bypass discharge through a wetland? N (Y or N)
Does the channel enter the stream at an angle? Y (Y or N)
Explanation of any "Other" responses above
W
+ R i
OK
Please provide plan details of flow splifler & supporting calcs.
III. REQUIRED ITEMS CHECKLIST
EDIT 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.
Requried Item:
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.
Initials Page or plan sheet number and any notes:
A.S -Maintenance access is via the roadway side slope
-See Sheet 1 of 2
Form SW401 - LS-VFS - 27Ju12011 - Rev.9 page 5 of 9

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.
3. Section view of the level spreader (1" = 20' or larger) showing:
- Underdrain system (if applicable),
Level lip,
Upslope channel, and
Downslope filter fabric.
4. Plan details of the flow splitting device and supporting calculations (if applicable)
5. A construction sequence that shows how the level spreader will be protected from
sediment until the entire drainage area is stabilized.
6. If a non-engineered VFS is being used, then provide a photograph of the VFS showing
that no draws are present.
7. The supporting calculations.
8. A copy of the signed and notarized operation and maintenance (00) agreement.
AS See Sheet 2 of 2
-See Sheet 2 of 2
-See Sheet 2 of 2
AS- .*See Sheet 2 of 3
AS -See "Level Spreader & Flow Bypass Calculations for Peakway Project"
AS -Attached
Form SW401 - LS-VFS - 27Ju12011 - Rev.9 page 6 of 9

WDENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER - VEGETATED FILTER STRIP (LS-VFS) SUPPLEMENT
This form must be completely filled out, printed, initialed, and submitted.
ri-PR6--IECT INFORMATION
Project name Apex Peakway North
Contact name Adam Stephenson
Phone number 2493417
Date August 4, 2011
Drainage area number C
II. DESIGN INFORMATION
The purpose of the LS-VFS Butter Rule: Diffuse Flow
Stormwater enters LS-VFS from The drainage area
Type of VFS Engineered filter strip (graded & sodded, slope < 8%)
Explanation of any "Other" responses above
If Stormwater Enters the LS-VFS from the Drainage Area
Drainage area 4,356 it,
Impervious surface area 4,356 ft
Percent impervious 100.00 %
Rational C coefficient 0.95
Peak flow from the 1 in/hr storm 0.10 cis
Time of concentration 5.00 min
Rainfall intensity, 10-yr storm 7.22 in/hr
Peak flow from the 10-yr storm 0.69 cis
Design storm 1 inch/hour storm
Maximum amount of flow directed to the LS-VFS 0.10 cis
Is a flow bypass system going to be used? Y (Y or N)
Explanation of any "Other" responses above
If Stormwater Enters the LS-VFS from a BMP Do not complete this section of the form.
Type of BMP
Peak discharge from the BMP during the design storm cis
Peak discharge from the BMP during the 10-year storm cis Do not complete this section of the form.
Maximum capacity of a 100-foot long LS-VFS 10 cis
Peak flow directed to the LS-VFS cis Do not complete ;his section of the form.
Is a flow bypass system going to be used? (Y or N)
Explanation of any "Other" responses above
LS-VFS Design
Forebay surface area sq ft
Depth of forebay at stormwater entry point in
Depth of forebay at stormwater exit point in
Feet of level lip needed per cis 10 ft/cfs
Computed minimum length of the level lip needed 1 it Ten feet is the minimum level spreader length.
Length of level lip provided 10 it
Form SW401 - LS-VFS - 27Jul2011 - Rev.9 page 7 of 9
Width of VFS
Elevation at downslope base of level lip
Elevation at the end of the VFS that is farthest from the LS
Slope (from level lip to the end of the VFS)
Are any draws present in the VFS?
Is there a collector swale at the end of the VFS?
Bypass System Design (if applicable)
Is a bypass system provided?
Is there an engineered flow splitting device?
Dimensions of the channel (see diagram below):
M
B
W
y (flow depth for 10-year storm)
freeboard (during the 10-year storm)
Peak velocity in the channel during the 10-yr storm
Channel lining material
Does the bypass discharge through a wetland?
Does the channel enter the stream at an angle?
Explanation of any "Other" responses above
30 ft
469.52 fmsl
467.87 fmsl
5.50 %
N (Y or N)
N (Y or N)
Y (Y or N)
Y (Y or N)
2.00 ft
1.00 ft
6.00 ft
0.20 ft
1.10 ft
2.95 ft/sec
Pick one:
GK
Please provide plan derails of flow spli er & supporting calcs.
N (Y or N)
Y (Y or N)
W
+ A ?
III. REQUIRED ITEMS CHECKLIST
EDIT 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.
Requried Item:
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.
Initials Page or plan sheet number and any notes:
AS -Maintenance access is via the roadway side slope
-See Sheet 1 of 2
Form SW401 - LS-VFS - 27Ju12011 - Rev.9 page 8 of 9

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.
3. Section view of the level spreader (1" = 20' or larger) showing:
- Underdrain system (if applicable),
Level lip,
Upslope channel, and
Downslope filter fabric.
4. Plan details of the flow splitting device and supporting calculations (if applicable)
5. A construction sequence that shows how the level spreader will be protected from
sediment until the entire drainage area is stabilized.
6. If a non-engineered VFS is being used, then provide a photograph of the VFS showing
that no draws are present.
7. The supporting calculations.
8. A copy of the signed and notarized operation and maintenance (OW) agreement.
AS -See Sheet 2 of 2
-See Sheet 2 of 2
-See Sheet 2 of 2
__.?,?_ See Sheet 2 of 3
AS -See "Level Spreader & Flow Bypass Calculations for Peakway Project"
Attached
Form SW401 - LS-VFS - 27Jul2011 - Rev.9 page 9 of 9
Town of Apex
North Carolina
level Spreader & Flow Bypass
Calculations
for
Peakway Project
-
? It!I!!I(lfri/
SEAL
lv . 27917
Digitally sig4'd"by'dam L. Stephenson
Date: 2011.08.04 16:04:05 -04'00'
Engineering Division
Department of Engineering and Construction Management
73 Hunter Street
Apex, NC 27502
[phone]
Level Spreader Lengths
1 in/hr storm
Impervious
Area A 0.28
Area B 0.77
Area C 0.10
C Area (ac) I (in/hr) Post Q Length LS Use
0.81 0.34 1.00 0.28 cfs 2.8 feet 10' (minimum)
0.80 0.95 1.00 0.76 cfs 7.6 feet 10' (minimum)
0.95 0.10 1.00 0.10 cfs 1.0 feet 10' (minimum)
1 of 5
Area A
10-year Peak Discharge Channel Design
QP = CIA Q = 1.486/n A R"'S'i2
A = 0.34 ac
A=By+My2
125 = g/(h+Tc) P = B + 2y(1 +W)"
g = 195 W = B +2My
h = 22 R = A/P
Tc = 5.0 min
1 = 7.22 in/hr Normal depth procedure
discharge
C = 0.95 asphalt/ concrete side slope
= 0.18 median, shoulder bottom width
0.28 impervious area top width
= 0.81 overall depth of channel
longitudinal slope
QP = 2.0 cfs Manning's roughness
depth of flow
freeboard
Ax=Q/Va
Bypass to BMP
Q = 2.0 1.0 cfs
M= 2 2
B= 1 1ft
W= 7 6ft
= 1.5 1.25 ft
S = 0.111 0.111 ft/ft
n= 0.030 0.030
y=1 0.25 0.2 ft
= 1.2 1.'1 ft
required x-sectional area A. =
assigned velocity Va =
0.4 0.2 sf
5.2 4.3 fps
2of5
Area B
10-year Peak Discharge Channel Design
Qp = CIA Q = 1.486/n A R2/3S1/2
A = 0.95 ac
A=By+My2
125 g/(h+Tc) P = B + 2y(1 +W)"
g = 195 W=B+2My
h = 22 R = A/P
Tc = 5.0 min
1 = 7.22 in/hr Normal depth procedure
discharge
C = 0.95 asphalt / concrete side slope
= 0.18 median, shoulder bottom width
0.77 impervious area top width
= 0.80 overall depth of channel
longitudinal slope
Qp = 5.5 cfs Manning's roughness
depth of flow
freeboard
Ax=Q/Va
Bypass
Q = 5.5 cfs
M= 2
B= 1ft
W= 8ft
= 1.75 ft
S = 0.038 ft/ft
n = 0.030
y = 0.6 ft
= 1.2 ft
required x-sectional area A. = 1.2 sf
assigned velocity Va = 4.7 fps
3of5

Area C
10-year Pe ak Discharge Channel Design
QP = C I A Q= 1.486/n A R2i3S1i2
A = 0.10 ac
A = By + My2
125 = g/(h+Tc) P = B + 2y(1+M")u.-"
g = 195 W=B+2My
h = 22 R = A/P
Tc = 5.0 min
I = 7.22 in/hr Normal depth procedure
discharge
C = 0.95 asphalt / concrete side slope
= 0.18 median, shoulder bottom width
0.10 impervious area top width
= 0.95 overall depth of channel
longitudinal slope
QP = 0.7 cfs Manning's roughness
depth of flow
freeboard
Ax=Q/Va
Bypass to BMP

Q = 0.7 1.0 cfs
M= 2 2
B= 1 1ft
W= 6 Eft
= 1.25 1.25 ft
S = 0.053 0.053 ft/ft
n = 0.030 0.030
y = 0.2 0.2 ft
= 1.1 1.0 ft
required x-sectional area Ax =
assigned velocity Va =
0.2 0.3 sf
3.0 3.3 fps
4 of 5
Flow Splitter - Pipe to LS & VFS
Culvert Capacity - Orifice Equation
Discharge A
1"/hour 1 cfs*
Q = 0.0437 Cd D2 (Z - D/24)0.5
discharge Q = 0.28 cfs Q = 1.00 cfs
coefficient of discharge Cd = 0.59 Cd = 0.59
diameter D = 4 in D = 8 in
depth of water above invert Z = 7.4 in Z = 8.4 in
headwater/diameter Hw/D = 1.9 OK Hw/D = 1.1 OK
Discharge B
Q = 0.0437 Cd D2 (Z - D/24)0.5
discharge Q = 0.76 cfs Q = 1.00 cfs
coefficient of discharge Cd = 0.59 Cd = 0.59
diameter D = 6 in D = 8 in
depth of water above invert Z = 11.1 in Z = 8.4 in
headwater/diameter Hw/D = 1.9 OK Hw/D = 1.1 OK
Discharge C
Q = 0.0437 Cd D2 (Z - D/24)0.5
discharge Q = 0.10 cfs Q = 1.00 cfs
coefficient of discharge Cd = 0.59 Cd = 0.59
diameter D = 3 in D = 8 in
depth of water above invert Z = 3.5 in Z = 8.4 in
headwater/diameter Hw/D = 1.2 OK Hw/D = 1.1 OK
* Pipe size determined based on maximizing use of level spreader (10' min.
length) which accommodates 1 cfs.
5 of 5

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 BMW.
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 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
repair.
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 1 of 3
BMP element: Potential problem: 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 Oversight 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.
Project name:PeakwaProject (from Laura Duncan Road to New Dover Road)
BW drainage area number:A B & C
Print name:Bruce Radford
Title:Town Manager. Town of Apex, North Carolina
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, Georgia A. Evangelist , a Notary Public for the State of
North Carolina , County of Chatham , do hereby certify that
Bruce Radford
personally appeared before me this 4th
day of August, 2011 , and acknowledge the due execution of the
forgoing filter strip, riparian buffer, and/or level spreader maintenance requirements.
Witness my hand and official seal ???
' j`J-Q G? V 0/?tg 9
I If -I
_.,%Jae
11,q ;90
?OTAgy
s AU130G v
SEAL
My commission expires 10-20-2014
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 3 of 3
Address:PO Box 250, Apex, NC 27502
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