20061421 Ver 1_Worksheets_20060915

Project Name: Middle Cr Cor
Project No. DWQ 061421
DA 1
SUBMITTED DESIGN:
elevations
Permanent Pool (ft) 295.5
Temporary Pool (ft) 296
areas
Permanent Pool SA (sq ft) 11567
Drainage Area (ac) 9.5
Impervious Area (ac) 6.5'
Forebay (ft2) 1726
High Marsh (ft2) 4026
Low Marsh (ft2) 4026
Micropool (ft2) 1726
volumes
Temporary Pool (cu ft)
17500
other parameters
SA/DA
Orifice Diameter (in)
Design Rainfall (in)
2,78'.
1`
1
Linear Interpolation of Correct SA/DA
Next Lowest
Project Impervious
Next Highest
Im ervious
6
68.4
70
~tJ~~
~~~s~~
REQUIRED DESIGN:
3
0.5 ft. depth
11604 sq. ft.
68.4
14.92176
34.8
34.8
14.92176
99.45535
22960 cu. ft.
2.80
awdown
15.4 day rawdown
3 ft. Permanent Pool Depth
SA/DA from Table
2.4
2.80
2,88
ok
check surfac
ok
ok
ok
ok
check tempo
check drawG

DWQ Project No.
DIVISION OF WATER QUALITY -LEVEL SPREADER WORKSHEET
I. PROJECT INFORMATION please complete the following information):
Project Name : C i~~ ~'~ ~,R.(~ ~ I! ~ ~` ~'~ f' <J
Contact Person: cab-(. ~ ~~' Ec~ , €; G. Phone Number: ~ ~. ~ ~ ' ~ ~
Level SpreaderlD:_
Level Spreader Length ~ ft. (perpendicular to flow)
Drainage Area ac. (on-site and off-site drainage to the level spreader)
Impervious Area fr ac. (on-site and off-site drainage to the level spreader)
Maximum Filter StriplBuffer Slope f % (6% for forested, leaf littler cover, 8% for thick ground cover
grass
Max. Discharge from 1"/Hr Storm ~. • ~" cfs
Max, Discharge to Level Spreader ~ cfs
Filter Strip/Buffer Vegetation ~ ~'~=F~ (thick ground cover or grass, canopied forest with leaf lifter
groundcover)
Pre-treatment or Bypass Method Used ~ ^at~~ x E~~-u ~'c~ ~ ~g u'~'~F
II. REQUIRED ITEMS CHECKLIST ~,~'~ t'~' ---° v~ t~- ~ `
lnitiaE in the s ace rovided to indicate the following design requirements have been met and supp~ documentation is attachecr. If a
P p
requirement has not been met, a#ach an explanation of svhy 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.
A~plican~ts Initials
Level spreader is at least 13 ft. per cfs for thick ground cover or grass or 65 ft per cfs in canopied forest with leaf
lifter for 50-foot buffer; 50 ft per cfs for 100-foot buffer, or 40 ft. per cfs for 150-foot buffer.
~~ Pre-Formed Seour Holes are on flat slopes only.
~~ No structures are located in protected buffers (must meet no practical alternatives criteria).
Design Alternative (if any) and Bypass method used:
Bypass conveyance method is specified and plan details and calculations are provided.
Alternative design option is specified and plan details and calculations are provided.
A',~ Discharge to level spreader and subsequent filter strip is hydraulically and spatially separate from the bypass
discharge.
~,~~ No structures are located in protected buffers.
~-~~° Plan details for the bypass and outlets are provided.
r~'' The operation and maintenance agreement includes annual erosion and vegetation repair.
~~ The operation and maintenance agreement signed and notarized by the responsible party is provided.

DWQ Project No.
DIlrISION OF t'L'~.TER QtlQLITY - 4Q1 EXTENDED DETEI~TlON (and POCKET*} WETLAND WORKSHEET
I. PROJECT INFORM/~TION (please complete the following information)•
Project Name : r`t1 r~ ~~Fr Glc,c~ i=- ~~~ ~~~~
Contact Person: a~' ~u~~~ Phone Number:
For projects with multiple basins, specify which basin this worksheet applies to:
Permanent Pool Elevation
Temporary Pool Elevation
Permanent Pool Surface Area
Drainage Area
Impervious Area
Forebay Surface Area
Marsh 0"-9" Surface Area
Marsh 9"-18" Surface Area
Micro Pool Surface Area
Temporary Pool Volume
SA/DA used
Diameter of Orifice
19. REQUIREi) ITEMS CHECKLIST
~ ~,~ J ~ cu. ft.
U in

(elevation of the orifice invert out)
(elevation of the outlet structure invert in)
(water surface area at permanent pool elevation)
(on-site and otf-site drainage to the basin)
(on-site and off-site drainage to the basin)
(at permanent pool elevation approximately 15%}*
(at permanent pool elevation approximately 35%)*
(at permanent pool elevation approximately 35%)*
(at permanent pool elevation approximately 15%)*
(volume detained on top of the permanent pool)
(surface area to drainage area ratio)*
(draw down orifice diameter)
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 BIJiP, design calculations, plans and specifications shouwng 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 fiinal review and approval of the project
~ ~~: The temporary pool controls runoff from the 1 inch rain.
'~r~~ The basin side slopes are no steeper than 3:1.
.~; A planting plan for the marsh areas with plant species and densities is provided.
~ . Vegetation above the permanent pool elevation is specified.
An emergency drain is provided to drain the basin.
~ ~ The temporary pool draws down in 2 to 5 days.
~t~ Sediment storage is provided in the permanent pool.
~~ A sediment disposal area is provided.
~?~ ~ Access is provided for maintenance.
1 a ` 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.
E,~ l~~ Access is provided for maintenance.
k: ~!~' Plan details for the wetland are provided.
~a Plan details for the inlet and outlet are provided.
~-s R site specific operation and maintenance agreement, signed and notarized by the responsible party is provided (see
http://h2o.ehnr.state.nc.uslncwetlands/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.
~ ft.

d i,~~ 1 sq. ft.
•% ac.
Ce. ~` ac.
I ~ ~ ~ sq. ft.
,~ o ~"~ sq. ft.
~{ v 2 6, sq. ft.
C F x ~ sq. ft.