20070936 Ver 1_More Info Received_20071115

i
TIC JOHN R McADAMS COMPANY, INC.
LETTER OF TRANSMITTAL
To: Ms. Annette Lucas
DWQ
2321 Crabtree Blvd.
Raleigh, North Carolina 27604
X919) 733-3425
Re: 77 Overlook Park
I am sending you the following item(s):
__--
COPIES DATE NO. DESCRIPTION
1 Wetland Worksheet -DWQ# 07-0936
These are transmitted as checked below:
® As requested ® For your use
® For approval ^
® For review and comment ^
Remarks:
Attached please find the original hard copy per your email request of November 14, 2007.
Copy to:
~eenny ~
Associa Project Engineer
FOR INTERNAL USE ONLY
^ Copy Letter of Transmittal Only to File~"'~ Emw-~ ,
® Copy Entire Document to File ~ ~° ~ ~~ ~~~ ,,; "~'~~ j
~1
CIVIL ENGINEERING LAND PLANNING • SURVEYING rj~Y; ~ ~ 2007
5311 04-527- 800 (off ce) •D 1v(8 0)1733 5646 rott704--527 20031(fax) 8217 .~ rp?~-~; ,~,Ai ~~ ~,,i~;,hUTp~-~~~
t .l~ .A i ~: fi~h~iil ~A ~"v11yCN
Date: November 14, 2007
REGULAR MAIL
Job No.: BCP-07000
Signed:

', .
DWQ Project No. d-]~ ~q 3~0
DIVISION OF WATER QUALITY - 401 EXTENDED DETENTION (and POCKET) WETLAND WORKSHEET
I. PROJECT INFORMATION (please complete the following information):
Project Name : `] ~ ~ ~! ~ 2 LIX~ IL QA ~ 1L
Contact Person: JA~11~t, CAL'i.~VV El.l.~ Phone Number: (qiq) ~(o (-r"-~,OpO
For projects with multiple basins, specify which basin this worksheet applies to: Tn W ETLA~N D
Permanent Pool Elevation ~ 3~ • c~0 ft. (elevation of the orifice invert out)
Temporary Pool Elevation `I 3R'. 39 ft. (elevation of the outlet structure invert in)
Permanent Pool Surface Area I L) ~ sq. ft. (water surface area at permanent pool elevation)
Drainage Area I ac. (on-site and off-site drainage to the basin)
Impervious Area 1 1.23 ac. (on-site and off-site drainage to the basin)
Forebay Surface Area 1 ~-i I sq. ft.
3 (at permanent pool elevation approximately 15%)*
Marsh 0"-9" Surface Area ~
23`1 sq. ft.
fD (at permanent pool elevation approximately 35%)*
Marsh 9"-18" Surface Area ~
51 U sq. ft.
l 1 (at permanent pool elevation approximately 35%)*
Micro Pool Surface Area ~
~ 1S sq. ft. (at permanent pool elevation approximately 15%)*
Temporary Pool Volume 3~J~ Z7U cu. ft. (volume detained on top of the permanent pool)
SA/DA used 3 (surface area to drainage area ratio)*
Diameter of Orifice 2 in. (draw down orifice diameter)
II. REQUIRED ITEMS CHECKLIST
Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a
requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes
a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed
drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for
additional information and will substantially delay final review and approval of the project
J~tV L The temporary pool controls runoff from the 1 inch rain.
~1~V The basin side slopes are no steeper than 3:1.
G A planting plan for the marsh areas with plant species and densities is provided.
WG Vegetation above the permanent pool elevation is specified.
11v An emergency drain is provided to drain the basin.
W The temporary pool draws down in 2 to 5 days.
1NG Sediment storage is provided in the permanent pool.
~ YJG A sediment disposal area is provided.
V~fG Access is provided for maintenance.
~ W A site specific, signed and notarized operation and maintenance agreement is provided.
The drainage area (including any offsite area) is delineated on a site plan.
Access is provided for maintenance.
Plan details for the wetland are provided.
Plan details for the inlet and outlet are provided.
~1 W A site specific operation and maintenance agreement, signed and notarized by the responsible party is provided (see
http:/m2o.eh nr.state.nc. us/ncwetlands/oandm.doc).
* Pocket Wetlands have different design parameters and are only assumed to remove 35%TSS - See pp. 19 and 20 of the NC DENR
Stormwater BMP Manual, April 1999. 10%open water, 50%high marsh, 40%low marsh.