20011549 Ver 1_Stormwater Info_20040402

WITHERS RAVENEL V?l ?wp LETTER 00 0
ENGINEERS I PLANNERS I SURVEY13RSI '---)
vii MacKenan Drive
CARY, NORTH CAROLINA,
[phone]
FAX [phone]oo8

To: Division of Water Quality
Wetlands/4o1 Certification Unit
2321 Crabtree Boulevard
Raleigh, North Carolina 276o4
WE ARE SENDING YOU
? Shop Drawings
? Copy of Letter
D/?TE_ /2/0 JOB NO.
201113.0
ATTENTION
John Dorne
PHONE # [phone]
RE: Lon Lake Subdivision
DWQ Permit #ol-15 9

® Attached ? Under separate cover via _
® Prints ? Plans ? Samples
? Change order ? Diskette ?
the following items:
? Specifications
COPIES DATE NO. DESCRIPTION
2 Storm Water Management Plan
w/Su ortin Calcs and 0&M

WETIANDS 1401

:1 2004
THESE ARE TRANSMITTED as checked below:
® For approval ? Approved as submitted
? For your use ? Approved as noted
? As requested ? Returned for corrections
? For review and comment ?
4 0 QUALITY SECTION
? Resubmit copies for approval
? Submit copies for distribution
? Return corrected prints
? FOR BIDS DUE 20 ? PRINTS RETURNED AFTER LOAN TO US
REMARKS:
COPY TO: John Dempsey, File SIGNED: Ken Jesneck, PE
If enclosures are not as noted, kindly notify us at once.
DWQ Project
DIVISION OF WATER QUALITY - LEVEL SPREADER WORKSHEET
1. PROJECT INFORMATION (please complete the following
Project Name: Co f b r i
Contact Person: C
Level Spreader ID:. -Z
Level Spreader Length 0 ft.
Drainage Area r ac.
Impervious Area 1 r $ ac.
Maximum Filter StriplBuffer Slope -717,3 %
grass
Max. Discharge from a 10 Year Storm
Max.. Discharge to Level Spreader
Filter Strip/Buffer Vegetation
Pre-treatment or Bypass Method
??3.1 _cfs
% cfs
CfG CQ
II. REQUIRED ITEMS CHECKLIST

Number:
p -pendicuartoflow)
(on-site and off-site drainage to the level spreader)
(on-site and off-site drainage to the level spreader)
(6% for forested, leaf littler cover, 8% for thick ground cover)"
(thick ground cover or grass, canopied forest with leaf litter
groundcover)
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.stormwatei 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 incorripiete submittal package will result in a request for
additional information and will substantially delay final review and approval of the Project.
A lica s Initials
Level spreader is at least 13 ft. per cfs for thick ground cover or grass or 100 ft per cfs in canopied forest with leaf
litter.
04N Pre-Form Scour Holes are on flat slopes only
z, (9.c -k>2 No structures are located in protected buffers"
If bypass method specified in the Draft Level Spreader Design Option Document:
IJ K- Bypass method is specified (if applicable) and plan details and calculations are provided
N N ____Discharge to level spreader and subsequent filter strip is hydraulically and spatially separate from the bypass
discharge.
i11 No structures are located in protected buffers.
Plan details for the bypass and outlets are provided.
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.
Level spreaders in series can be used on slopes of up to 15% in forested areas with leaf littler cover or on slopes of up to 25% in areas
with thick ground cover or grass if designed according to the Draft 'Level Spreader :Design Option Document. This potentially requires a
minor variance in protected buffer areas. In any event the second le Lei spre; _4 er cannot be located in Zone 1 of a protected buffer area.

E-?6C OF ENE l .
LEVEL SPREADER OPERATION AND MAINTENANCE AGREEMENT
LONG LAKE SUBDIVISION, TRACT 3, DEVICE G-2
The level spreader system is designed to provide diffuse storm water flow through the Riparian Areas.
Maintenance activities shall be performed as follows:
1. Level spreaders that provide diffuse flow shall be maintained every six months. All accumulated sediment
and debris shall be removed from the structure, and a level elevation shall be maintained across the
entire flow spreading structure. Any down gradient erosion must be repaired and/or replanted as
necessary.
2. Repair eroded areas immediately, re-seed or sod as necessary to maintain good vegetative cover, mow
vegetative cover to maintain a maximum height of six inches, and remove trash as needed.
I acknowledge and agree by my signature below that I am responsible for the performance of the two
maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any
changes to the system or responsible party.
Print name: Steve Schlageter
Phone: [phone]
Signature: ,?--
Date: April 1, 2004
Note: The legally responsible party should not be a homeowners association unless more than 50% of the
lots have been sold and a resident of the subdivision has been named the president.
I, aeq I D. Pcxq u e- , a Notary Public for the State of Nor* Caro l i na ,
County of Nrh (Ln , do hereby certify that Steve Schlageter
personally appeared before me this 1St day of April 2004 , and acknowledge the
due execution of the forgoing level spreader maintenance requirements. Witness my hand and official seal,
'TA
t Comm. ?
246-200x• v #
.Y.Y' N?
4f C
SEAL
My commission expires c -1 ? - o8
Page 1 of 2
DWQ Project
DIVISION OF WATER QUALITY - LEVEL SPREADER WORKSHEET
1. PROJECT INFORMATION (please complete the following information):
Project Name: L-D L ( Sc:i3brutSr?:r?t ( T-
Contact Person: L&n) es'oealll i phone Number (4121) Level Spreader ID:.
Level Spreader Length 1,77 ft. pG, cendicu ar to flow)
i.
Drainage Area .? ac. (on-site and off-site drainage to the level spreader)
Impervious Area LEM ac. (on-site and off-site drainage to the level spreader)
Maximum Filter Strip/Buffer Slope / Z % (6% for forested, leaf littler cover, 8% for thick ground cover)*
grass
Max. Discharge from a 10 Year Storm 'Zf . 3 cfs
Max- Discharge to Level Spreader V. 3 cfs
Filter Strip/Buffer Vegetation CovoLL (thick ground cover or grass, canopied forest with leaf litter
groundcover)
Pre-treatment or Bypass Method Ai 14 -
II- REQUIRED ITEMS CHECKLIST
Initial `hla space provided to indicate the following design requirements ha*re been met-and supporting documentation is attached. Ifa
requir er!e:)t has not been met, attach an explanation of why. At a minimam, a complete stormwater management plan submittal includes
a woticsheet for each BMP, design calculations, plans and specifications hewing all BMPs and outlet structure details, a detailed
drainage plan and a fully executed operation and maintenance agreemen.. An ncompiete submittal package will result in a request for
additional information and will substantially delay final review and approval of tl;e r.rciect.
Applicants ln?fials
KU ) Level spreader is at least 13 ft. per cfs for thick ground cover or grass or 100 ft per cfs in canopied forest with leaf
litter.
_Pre-Form Scour Holes are on flat slopes only
No structures are located in protected buffers*
If bypass method specified in the Draft Level Spreader Design Option Document:
Bypass method is specified (if applicable) and plan details and calculations are provided
NJ A- Discharge to level spreader and subsequent filter strip is hydraulically and spatially separate from the bypass
discharge.
Lv _No structures are located in protected buffers.
Plan details for the bypass and outlets are provided.
MA The operation and maintenance agreement inciudes annual erosion and vegetation repair.
&/A The operation and maintenance agreement signed and notarized by the responsible party is provided.
* Level spreaders in series can be used on slopes of up to 15% in forested areas with leaf littler cover or on slope s of up to 25% in areas
with thick ground cover or grass if designed according to the Draft Level Spreader Design Option Document. This potentially requires a
minor variance in protected buffer areas. In any event the second le-!e; spr,:z er cannot be located in Zone 1 of a protected buffer area.
f ?fZ--'?1 pJC'?ZN? (1? ?d m C
FN i .
6
LEVEL SPREADER OPERATION AND MAINTENANCE AGREEMENT
LONG LAKE SUBDIVISION, TRACT 4, DEVICE H
The level spreader system is designed to provide diffuse storm water flow through the Riparian Areas.
Maintenance activities shall be performed as follows:
Level spreaders that provide diffuse flow shall be maintained every six months. All accumulated sediment
and debris shall be removed from the structure, and a level elevation shall be maintained across the
entire flow spreading structure. Any down gradient erosion must be repaired and/or replanted as
necessary.
2. Repair eroded areas immediately, re-seed or sod as necessary to maintain good vegetative cover, mow
vegetative cover to maintain a maximum height of six inches, and remove trash as needed.
I acknowledge and agree by my signature below that I am responsible for the performance of the two
maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any
changes to the system or responsible party.
Print name: Steve Schlageter
Phone: [phone]
Signature: ?,?---
Date: April 1, 2004
Note: The legally responsible party should not be a homeowners association unless more than 50% of the
lots have been sold and a resident of the subdivision has been named the president.
I, ? uijl D. PQfaUPA" , a Notary Public for the State of Nc)(W Carolina.,
County of Durham , do hereby certify that Steve Schlageter
personally appeared before me this 1St day of April , 2004 and acknowledge the
due execution of the forgoing level spreader maintenance requirements. Witness my hand and official seal,
v?r TARG?
100
'??! cou?,,"r
SEAL
My commission expires oQ -/6 -C a
Page 1 of 2