20071760 Ver 1_More Info Received_20071217

Crowley, Crisp & Associates, Inc.
Professional Engineers
1906 South Main Street, Suite 122
Wake Forest, NC 27587
919-562-8860 • Fax: [phone]
TO: NCDWQ - 401/Wetlands Unit
2321 Crabtree Blvd
Raleigh, NC 27604
~~~~~ ors ~~Qa~~o~~a~
DATE 12!17/07 JOB NO. 07019
ATTENTION Annette Lucas
RE: Wake Cha el Church
~1- I1lDO
WE ARE SENDING YOU ®Attached ^ Under Separate Cover via the following items
^ Shop Drawings ^ Prints ®Plans ^ Samples ^ Specifications
^ Copy of Letter ^ Change Order ®Worksheet and letter
COPIES DATE NO. DESCRIPTION
YES 12/17/07 3 Sheets C2 and C3 from the construction drawin s
12/17/07 1 Revised Level S reader Worksheet
12/17/07 1 Letter

THESE ARE TRANSMITTED as checked below:
® For approval
^ For your use
® As requested
^ For review and comment
^ FOR BIDS DUE
REMARKS:
^ Approval as submitted ^ Resubmit corrected prints
^ Approved as noted ^ Submit copies for distribution
^ Returned for corrections ^ Return corrected prints
20 ^PRINTS RETURNED AFTER LOAN TO US
COPY TO: Jon Frazier, EI
919.562.8860 x 29
j on. fraz ier(cil gmail. com
[f enclosures aze not as noted, kindly notify us at once
SIGNED: ~
~~~~i=~~t>~ ~ ~`;~;
y~l0
~~
t~ ~:_ C ~ 1001
f)Er:R - t1,'A1 FR 4UALrfY
`NETtNdGS ~r:'D S7pnG,pu.:TFR aRRNCH

:1,
Crowley, Crisp & Associates, Inc.
Professional Engineers
C ^~
a.t1 /w
1906 SoudlMainStreet, Suite 122
Wake Forest, NC 27587
919-562-8860
p1 - 11 bo
December 17, 2007
Annette Lucas
401/Wetlands Unit
NCDWQ
2321 Crabtree Blvd
Raleigh, NC 27604
.~QR~,
C~,
Re: Project: Wake Chapel Church
Subject: Revised pond and level spreader plans
Dear Ms. Lucas,
Thank you for meeting with me to discuss the above project. I've attached revised sheets C2 and C3 from
the construction drawings. The following comments from our meeting have been addressed:
The level spreader length was recalculated based on planting grass below the level spreader to
the edge of the stream buffer while leaving the stream buffer intact. That included 8 feet of
grass and 52 feet of wooded vegetation for a total of 60 feet from the level spreader to the
stream. The required level spreader length is 125 ft, which is 58 ft/cfs at 2.15 cfs.
The emergency spillway was redesigned to flow around the bypass structure and enter the
stream at an angle.
The bypass channel was shown as entering the emergency spillway directly below the bypass
structure.
The revised Level Spreader Worksheet is also attached. There appears to be an error in the comment
column of the worksheet beside the `Length of level lip' row. The 125 ft provided for the lip is correct
based on 58ft/cfs for 2.15 cfs of flow.
Please let me know if you have any questions or additional comments.
Sincerely,
Jon Frazier, EI
Crowley, Crisp & Associates, Inc

®®~~AA\\ O~O~ W AT e9~G
~
w~/'r > y
NCDENR o `l ' ~ ~ loo ~ ~`
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part lll) must be printed, filled out and submitted along with all of the required information.
1 PROJEC'[ Nf'tJItMATKIN ;
Project name Wake Chapel Church Pond and Level Spreader
Contact name Jon Frazier
Phone number 919-562-8860 x29
Date December 14, 2007
Drainage area number NIA
. DESIGN INFORMATION
For Level Spreaders Receiving Flow From a BMP
Type of BMP Dry Pond
Drawdown flow from the BMP 2.15 cfs
For Level Spreaders Receiving Flow from the Drainage Area Do not complete this section of the worksheet.
Drainage area 332,363 ftz Do not complete this section of the worksheet.
Impervious surface area 332,363 ftz Do not complete this section of the worksheet.
Percent impervious 1.00 Do not complete this section of the worksheet.
Rational C coefficient Do not complete this section of the worksheet.
Peak flow from the 1 in/hr storm cfs Do not complete this section of the worksheet.
Time of concentration min
Rainfall intensity, 10-yr storm inlhr Do not complete this section of the worksheet.
Peak flow from the 10-yr storm cfs Do not complete this section of the worksheet.
Where Does the Level Spreader Discharge 1
To a bioretention cell? (Y or N)
To a wetland? (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 8 ft
Width of dense ground cover 0 ft
Width of wooded vegetation 52 ft
Total width 60 ft
Slope (from level lip to to top of bank) 3.33
Are any draws present? N (Y or N) OK
Level Spreader Design
Forebay surface area 665 sq ft OK
Feet of level lip needed per cfs 58 ft/cfs
Answer "Y" to one of the following:
Length based on the 1 inlhr storm? (Y or N)
Length based on the 10-yr, 24-hr storm? (Y or N)
Length based on the BMP discharge rate? Y (Y or N)
Design flow 2.15 cfs
Is a bypass device provided? Y (Y or N) OK
Length of the level lip 125 ft #VALUE!
Are level spreaders in series? N (Y or N)
Form SW401-Level Spreader, Finer Strip, Restored Riparian Buffer-Rev.3 Parts I. and II. Design Summary, page 1 of 2

Bypass Channel Design (if applicable)
Does the bypass discharge through a wetland? N (Y or N)
Does the channel enter the stream at an angle? Y
Dimensions of the channel (see diagram below):
M 3 ft
B 4 ft
W 10 ft
y 1 ft
Peak velocity in the channel during the 10-yr, 24-hr storm 12.85 cfs
Channel lining material Grass

~ i-------------
M
Y
;•~
B
1
M
Fonn SW401-Level Spreader, Finer Strip, Restored Riparian Buffer-Rev.3 Parts I. and II. Design Summary, page 2 of 2