20081246 Ver 1_More Info Received_20081119

Marriott DWQ EXP # 08-1246 - Re-dated LS Wkst
Subject: Marriott DWQ EXP # 08-1246 - Re-dated LS Wkst
From: "Yates, Kevin" <[e-mail]>
Date: Wed, 19 Nov 2008 13:11:23 -0500
To: "Lia Myott Gilleski" <[e-mail]>
CC: "McBryde, Leonard" <[e-mail]>
Lia,
Per your request, attached is the re-dated Level Spreader Worksheet to reflect today's date. Let me know if you
need anything else.
Thanks,
Kevin
Kevin Yates
Senior Environmental Scientist
Office: 919-287-4262
Cell: 919-624-6901
4.dd to address book
EcoEngineering
A division ol''The John R, McAthms C omlrua}, Ine.
P.O. Box 14005, Research Triangle Park, NC 27709
Design Services Focused On Client Success
Please consider the environment before you print this e-mail.
2008-19-11 revised Re-dated Level Sprdr Wksht.pdf
2008-19-11 revised
Content-Description: Re-dated Level Sprdr
Wksht.pdf
Content-Type: application/octet-stream
Content-Encoding: base64
1 of 1 11/19/2008 1:50 PM
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WDENR
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 INFORMATION
Project name Courtyard/Residence Inn by Marriott
Contact name Vinay Patel
Phone number 704-364-6008
Date November 19, 2008
Drainage area number #1
il. DESIGN INFORMATION
For Level Spreaders Receiving Flow From a BMP
Type of BMP NA
Drawdown flow from the BMP 0.00 cfs
For Level Spreaders Receiving Flow from the Drainage Area
Drainage area
Impervious surface area
Percent impervious
Rational C coefficient
Peak flow from the 1 in/hr storm
Time of concentration
Rainfall intensity, 10-yr storm
Peak flow from the 10-yr storm
Where Does the Level Spreader Discharge?
To a grassed bioretention cell?
To a mulched bioretention cell?
To a wetland?
To a filter strip or riparian buffer?
Other (specify)
Filter Strip or Riparian Buffer Characterization (if applicable)
Width of grass
Width of dense ground cover
Width of wooded vegetation
Total width
Elevation at downslope base of level lip
Elevation at top of bank of the receiving water
Slope (from level lip to to top of bank)
Are any draws present?
Level Spreader Design
Forebay surface area
Feet of level lip needed per cfs
Answer "Y" to one of the following:
Length based on the 1 inlhr storm?
Length based on the 10-yr storm?
Length based on the BMP discharge rate?
Design flow
Is a bypass device provided?
119,354,00 ftz
101,494.80 ftz
85.04 %
0.88
2.41 cfs
7.01 min
6.735 in/hr
16.24 cfs
NA
N (Y or N)
N (Y or N)
N (Y or N)
Y (Y or N) Please complete filter strip characterization below.
80.00 ft
0.00 ft
0.00 ft
80.00 ft
334.00 fmsl
332.00 fmsl
2.50 % OK
N (Y or N) OK

196.00 sq ft OK
13 fUcfs
Y (Y or N)
N (Y or N)
N (Y or N)
2.41 cfs
Y (Y or N) OK
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Parts I. and fl. 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

t ?------------ M

32.00 ft Level spreader length OK.
N (Y or N)
N (Y or N)
Y (Y or N)
2.00 it
2.50 ft
7.60 ft
0.92 ft
5.96 cfs
Rip Rap
i B i
1
M

Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Parts I. and II. Design Summary, page 2 of 2