20090189 Ver 1_More Info Received_20090504

LETTER OF TRANSMITTAL
J. Michael Stocks, PE
PO Box 1108
Nashville, NC 27856
252.459.8196 (O)
252.903.6891 (C)
To: Ms. Annette Lucas
401 Oversight/Permitting Unit
NCDENR Raleigh Office
2321 Crabtree Blvd., Suite 250
Raleigh, NC 27699-1650

Phone: [phone]
T7 - Overnight No x
We are sending you the folloWng.-
Paul D. Smith, PE
3344 Hillsborough Street
Suite 250, Raleigh, NC 27607
919.821.2440 (O)
919.880.5886 (C)
Job No. Z-2007-016
Job Name: Cape Fear Valley Site

Date: 05.04.09

Sent By. Don Curry, PE
? EC Plans ? Prints/Plans ? Construction Plat ? Site Plan Drawings
? Contracts x Permit Applications ? Site Work Calculations ?
These are transmitted as checked below.
x For Approval ? As Discussed
? For Review and Comment
? For Your File ? As Requested
? For Your Signature, then return to:
Copies Date Description

2 D
REVISED Permit Plans -Full Size
3 REVISED Permit Plans -11 x 17 MAY 0 4 20 9
MW - WATER QUALITY
5 REVISED Page 2, SWU-101 Form
1 REVISED Calculations & Backup Documentation
1 Letter Addressing Revisions
Remarks
Annette.
Enclosed are revised sections of the previously submitted application package for the low-density
stormwater permit at the Autumn Cori) site in Fayetteville
Feel free to contact me with any questions
Thanks,
Don (Raleigh Office)
? Computer Disk
? For Your Use
Copies To file
Stocks Engineering, P.A.
DeSL9vi.ivt,9 the f=uture, -Fodal?.
May 4, 2009
Ms. Annette Lucas
401 Oversight/Express Review Permitting Unit
NCDENR Raleigh Office
2321 Crabtree Boulevard, Suite 250
Raleigh, NC 27604
Re: Proposed Autumn Corporation Cape Fear
Assisted Living/Nursing Home
REVISED Low-Density Stormwater Application
Dear Ms. Lucas:
This letter is in response to your letter dated March 24, 2009, requesting additional information in order to process a
PCN Application and Low-Density Stormwater Application for the above referenced project. The revised design
presented herein is based on subsequent discussions with your office resulting in a proposed low-density scenario.
The following items have been revised to meet the low-density requirements, consistent with our meeting on
Tuesday, April 28, 2009:
• Curb & gutter has removed around the outer parking lot perimeter to facilitate sheet flow off the pavement
areas.
• Proposed storm drainage structures have been reduced from 32 to 8.
• Proposed storm drainage piping has been reduced from approx. 2,450 LF to approx. 750 LF.
• Perimeter ditches have been removed to more quickly enable drainage leaving the site to follow natural
drainage patterns to the existing wetland.
In addition to revised drawings and calculations, I have enclosed an updated page 2 of SWU-101, summarizing the
overall impervious areas on the property. Also, please note that DWQ has recommended that a Nationwide Permit
#39 would be more appropriate for this application than a Nationwide Permit # 19.
I appreciate your review of this information. Please feel free to contact me with any questions or concerns.
Sincerely,
Stocks Engineering, P.A. - Raleigh
Donald L. Curry, Jr., P.E.
Associate
Encl: NCDENR SWU 101 Form (Pg 2 only)
Calculations & Plans
J. Michael Stocks, PE
1100 Eastern Ave.
PO Box 1108
Nashville, NC 27856
252.459.8196 (voice)
252.459.8197 (fax)
252.903.6891 (mobile)
[e-mail]
Paul D. Smith, PE
3344 Hillsborough Street
Suite 250
Raleigh, NC 27607
919.821.2440 (voice)
919.821.2210 (fax)
919.880.5886 (mobile)
[e-mail]
2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the
existing permit number N/A and its issue date (if known)
3. Specify the type of project (check one):
®Low Density ?High Density ?Redevelop ?General Permit ?Universal SMP ?Other
4. Additional Project Requirements (check applicable blanks; information on required state permits can be
obtained by contacting the Customer Service Center at 1-877-623-6748):
?CAMA Major ®Sedimentation/Erosion Control ®404/401 Permit ?NPDES Stormwater
III. PROJECT INFORMATION
1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing stormwater management for the project.
Low Density - vegetated conveyance into existing wetland
2. Stormwater runoff from this project drains to the Cape Fear River basin.
3. Total Property Area: 19.98 acres 4. Total Wetlands Area: 3.27 acres
5. 100' Wide Strip of Wetland Area: N/A acres (not applicable if no wetlands exist on site)
6. Total Project Area**: 19.98 acres 7. Project Built Upon Area:17 %
8. How many drainage areas does the project have?l
9. Complete the following information for each drainage area. If there are more than two drainage areas in the
project, attach an additional sheet with the information for each area provided in the same format as below.
For high density projects, complete the table with one draina-?e area for each engineered stormwater device.
Basin Infornnation Drainage Area 1 Drainage Area 2
Receiving Stream Name Unnamed Trib to Beaver Creek
Stream Class & Index No. C
Total Drainage Area (sf) 18,549,300
On-site Drainage Area (sf) 870,300
Off-site Drainage Area (sf) 17,679,000
Existing Impervious* Area (sf) 0
Proposed Impervious*Area (sf) 148,316
% Impervious* Area (total) 170/6
Impen- qus" Surface Area Drainage Area 1 Drainage Area 2
On-site Buildings (sf) 52,461
On-site Streets (sf) 0
On-site Parking (sf) 85,919
On-site Sidewalks (sf) 9,936
Other on-site (sf) 0
Off-site (sf) 0
Total (sf): 148,316
Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
**Total project area shall be calculated based on the current policy regarding inclusion of wetlands in the built upon area
percentage calculation. This is the area used to calculate percent project built upon area (BUA).
Form SWU-101 Version 03.27.08 Page 2 of 4

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Appendices
Zee s '
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Outlet W = Do + La
diameter (Dp)
pipe 1
i water < 0.5Do

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ve?9?r of PQ so
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lu 20 50 100 200 500 is
Discharge (0/sec)
l :l y.K
Curves may not be extrapolated.
Figure 8.06a Design of outlet protection protection from a round pipe flowing full, minimum tailwater condition (Tw < 0.5 diameter).
Q /N- q ?- if=s
Rev. 12193 'P/ 8.06.3
Appendices
3D.. ----IT

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=1Z.'r
Rev. 12/93 8.06.3
to zu 50 100 200 500 1000
Discharge (ft3/sec)
Appendices
3D., /if
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Curves may not be extrapolated.
Figure 8.06a Design of outlet protection protection from a round pipe flowing full, minimum tailwater condition (Tw < 0.5 diameter).
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