20071665 Ver 3_Application_20080416

C ENGINEERING
TRANSMITTAL LETTER
TO: Lax"d i gam(W
tJi2ttZK%i1 S.3; L QICDG?An - °r"
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The following items:
w/Plans
? Drawings
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CH Engineering, PLLC
4601 Lake Boone Trail
Raleigh, NC 27607
919.788.0224
919.788.0232 (fax)
C) s Y3
DATE:
RE:
STF_i=' w

Delivered via:
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COPIES DESCRIPTION
y s APP I
Le-04 re ci- K**A- ' DEwk - WA
MMMUSANUMOF

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6 2008
ttJAUTY
MiWATER BRANCH
? For Approval ? Approved as Submitted
? For Your Use ? Approved As Noted
? As Requested ? Returned for Revisions
? For Distribution "For Review and Comment
r re--0jc cpvn aM uL-4-s f-eZe j oe b to fta l`t 7 ,08
? Digital Files
? Change Orders
P- Documents
W
PR --
ENGINEERING CALCULATION SHEET
CLIENT (2P,, rZiA4 i= z?i--z:.L SUBJECT
PROJECT No.
PAGE
OF
Prepared By Date
Reviewed By Date
3.0 ,

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APP
6 2008
WETLANDS AND STORMWATER BRANCH
Formulating Pre- & Post- Development Hydrographs
utilize small watershed method & center-weighted storm (Malcom)
Location Raleigh/Durham
Return Period 10 year
1= ^(7?2in1hr (ass:.m:>6 'c <- 5 CT;in cheek bernvi
Cpre 0.35 (Rational C, see adjoining table)
Cpost 0.=114
A=
A= 3,000! acre
130680 st
Rainfall A in (6 hr Depth)
Qpre= 7.6a cfs
Qpost= 3fQ cfs
Vol - Pre 1 5827: cf (total pre-development runoff volume)
Vol - Post 22536 cf (total post-development runoff volume)
Tpre 25 inin Time of Concentration Check (Kirpich Tc Equation)
Tpost 30; ruin Predevelopment
L 700 ft (Length of Overland Flow)
S 0.04 ft/ft (average overland slope)
tc 4:F,min bare soil
?re asp tc 'min grassed
, .trrtn
0 0.00 0.00 Post Development
1 0.03 0.02 L 700` ft (Length of Overland Flow)
2 0.12 0.10 S 0.036 ft/ft (average overland slope)
3 0.27 0.22 tc 4:35 min bare soil
4 0.47 0.38 tc 1.74)min asphalt/concrete
5 0.72 0.60
6 1.03 0.85 Note: Compare this to a 5 minute minimum.
7 1.37 1.14
8 1.76 1.47
9 2.17 1.83
10 2.61 2.22
11 3.07 2.64
12 3.55 3.08
13 4.02 3.53
14 4.49 3.99
15 4.95 4.45
16 5.40 4.92
17 5.81 5.38
18 6.20 5.84
19 6.55 6.27
20 6.85 6.69
21 7.11 7.09
22 7.31 7.45
23 7.46 7.79
24 7.55 8.08
25 7.58 8.34
26 7.55 8.56
27 7.47 8.73
28 7.32 8.86
29 7.12 8.94
30 6.87 8.97
31 6.57 8.95
32 6.24 8.88
33 5.93 8.77
34 5.63 8.61
35 5.34 8.40
36 5.07 8.15
37 4.82 7.87
38 4.57 7.55
39 4.34 7.23
40 4.12 6.93
41 3.91 6.64
42 3.71 6.36
43 3.53 6.09
44 3.35 5.83
45 3.18 5.58
NCDENR
o?oF wnr??Ea??QG
P-; Y
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 111) must be printed, filled out and submitted along with all of the required information.
Project name
Contact name
Phone number
Date
Drainage area number

IL DESItaN?I,NFORMATION? _ __ ___ i
For Level Spreaders Receiving Flow From a BMP
Type of BMP
Drawdown flow from the BMP cis
For Level Spreaders Receiving Flow from the Drainage Area
Drainage area , -fie Ae.
Impervious surface area ) It2
Percent impervious
Rational C coefficient
Peak flow from the 1 in/hr storm cis
Time of concentration ; min
Rainfall intensity, 10-yr storm -7, Z 2 in/hr
Peak flow from the 10-yr storm 8 ?'J cis
Where Does the Level Spreader Discharge?
To a bioretention cell? (Y or N)
To a wetland? q° (Y or N)
To a filter strip or riparian buffer? (Y or N)
Other (specify)
Filter Strip or Riparian Buffer Characterization (if applicable)
Width of grass ft
Width of dense ground cover it
Width of wooded vegetation ft
Total width ft
Slope (from level lip to to top of bank) %
Are any draws present? (Y or N)
Level Spreader Design
Forebay surface area G" sq it
Feet of level lip needed per cis ; ft/ifs
Answer "Y" to one of the following:
Length based on the 1 in/hr storm? (Y or N)
Length based on the 10-yr, 24-hr storm? (Y or N)
Length based on the BMP discharge rate? (Y or N)
Design flow " cis
Is a bypass device provided? (Y or N)
Length of the level lip P it
Are level spreaders in series? (Y or N)
Form SW401-1_evel Spreader, Filter Strip, Restored Riparian Buffer-Rev.3 Parts I. and Il. Design Summary, page 1 of 2
II. z R'>_(D1=JIREDP ITEMS'?CH ECKLI,ST =
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An-incomplete submittal package will
result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to
indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Page/ Plan
Ini ' Sheet No.

Plans (1" - 50' or larger) of the entire site showing:
Design at ultimate build-out,
Off-site drainage (if applicable),
Delineated drainage basins (include Rational C coefficient per basin),
Forebay (if applicable),
High flow bypass system,
Maintenance access,
Recorded drainage easement and public right of way (ROW), and
Boundaries of drainage easement.
2. Plan details (1" = 30' or larger) for the level spreader showing:
Forebay (if applicable),
High flow bypass system,
One foot topo lines between the level lip and top of stream bank,
Recorded drainage easement, and
Design at ultimate build-out.
Section view of the level spreader (1" = 20' or larger) showing:
- Underdrain system (if applicable),
Level lip,
Upslope channel, and
Downslope filter fabric.
4. A date-stamped photograph of the filter strip that clearly shows the type of vegetation that is present.
5. An assurance that the installed system will meet design specifications upon initial operation once the
project is complete and the entire drainage area is stabilized.
6. A construction sequence that shows how the level spreader will be protected from sediment until the entire
drainage area is stabilized.
7. The supporting calculations.
8. A copy of the signed and notarized inspection and maintenance (I&M) agreement.
9. A copy of the deed restriction.
H/
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.3 Part III, page 1 of 1
IIL - -
--M- lj�;, --v
t—, r— I Ax

Permit Number:
(to be provided by DW?
Drainage Area Number: EA.
Filter Strip, Restored Riparian Buffer and Level Spreader
Inspection and Maintenance Agreement
I will keep a maintenance record on this BNT. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
Important maintenance procedures:
- Immediately after the filter strip is established, any newly planted vegetation
will be watered twice weekly if needed until the plants become established
(commonly six weeks).
- Once a year, the filter strip will be reseeded to maintain a dense growth of
vegetation
- Stable groundcover will be maintained in the drainage area to reduce the
sediment load to the vegetation.
- Two to three times a year, grass filter strips will be mowed and the clippings
harvested to promote the growth of thick vegetation with optimum pollutant
removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches and
may be allowed to grow as tall as 12 inches depending on aesthetic requirements
(NIPC,1993). Forested filter strips do not require this type of maintenance.
- Once a year, the soil will be aerated if necessary.
- Once a year, soil pH will be tested and lime will be added if necessary.
After the filter strip is established, it will be inspected quarterly and within 24 hours
after every storm event greater than 1.0 inch (or 1.5 inches if in a Coastal County).
Records of inspection and maintenance will be kept in a known set location and will be
available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
The entire filter strip Potential problem:
Trash/debris is present How I will remediate the problem:
Remove the trash/debris.

pflow sputter device The flow sputter device is Unclog the conveyance and dispose
(f applicable) clo ed. of an sediment off-site.
The flow splitter device is Make any necessary repairs or
damaged. replace if damage is too large for
re air.
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer I&M-Rev.2 Page 1 Of 3
BMP element: Potential problem: How I will remediate the problem:
The swale and the level The Swale is clogged with Remove the sediment and dispose
lip sediment of it off-site.
The level lip is cracked, Repair or replace lip.
settled, undercut, eroded or
otherwise damaged.
There is erosion around the Regrade the soil to create a berm
end of the level spreader that that is higher than the level lip, and
shows stormwater has then plant a ground cover and
bypassed it water until it is established. Provide
lime and a one-time fertilizer
a lication.
Trees or shrubs have begun Remove them.
to grow on the swale or just
downslo a of the level lip.
The bypass channel Areas of bare soil and/or Regrade the soil if necessary to
erosive gullies have formed. remove the gully, and then
reestablish proper erosion control.
Turf reinforcement is Study the site to see if a larger
damaged or ripap is rolling bypass channel is needed (enlarge if
downhill. necessary). After this, reestablish
the erosion control material.
The filter strip Grass is too short or too long Maintain grass at a height of
if applicable). approximately three to six inches.
Areas of bare soil and/or --Re-grade the soil if necessary to
erosive gullies have formed. remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
Sediment is building up on Remove the sediment and
the filter strip. restabilize the soil with vegetation if
necessary. Provide time and a one-
time fertilizer application.
Plants are desiccated. Provide additional irrigation and
fertilizer as needed.
Plants are dead, diseased or Determine the source of the
dying. problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application.
Nuisance vegetation is Remove vegetation by hand if
choking out desirable species. possible. If pesticide is used, do not
allow it to get into the receiving
water.
The receiving water Erosion or other signs of Contact the NC Division of Water
damage have occurred at the Quality local Regional Office, or the
outlet 401 Oversight Unit at 919-733-1786.
Form SIAU401-Level Spreader, Filter Strip, Restored Riparian Buffer I&M-Rev.2 Page 2 of 3
Permit Number:
(to be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the 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.
Project name:
BMP drainage area number:

Print name:/
Title:
Address: f S % ,' >? i ?'£ ?? ?G? X101)
PI
Si
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, D I' A• Lee-, , a Notary Public for the State of
hdomes v-? h ` ?,l?y ounty of? nhns?'nn , do hereby certify that
_N I L 1 icon-))p personally appeared before me this
day of and acknowledge the due execution of the
forgoing filter strip, riparian buffer, and,'or level spreader maintenance requirements.
Witness my hand and official seal,
?e.%%I.... Its.
•'`?OTAR1,''
Myr Comm. ExCpiirss
?O, • PUBOC'•'?
SEAL
My commission expires
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer I&M-Rev.2 Page 3 of 3
Date- ?x
NCDENR Stormwater BMP Manual
Chapter Revised 09-28-07
Figure 8-1:
Plan View of a Level Spreader (adapted from Hathaway 2006)
Filter Strip: Could be a riparian buffer, vegetated
Flow Bypass filter strip or restored riparian buffer. 14 Structure ` ?• Receiving
i+iccDcD \ ._???i.."r:Jril'?ti?:::;.?:{.?: `h::.;;c?.., ,...`::,.
JJJIII Stream
From Watershed
5
Forebay ; ?ti?, a Y.`:' ti Y"• ?vr Y:? Y.... r
W JC{.f 'fSM{?
• +}'{'{Xi}+.+Y>:,JC,?L:: v{I?. K•LJ?N ?? 'Y.. ?'?i JC Y.
•: ?},f?.; ?n?;i'.K.`+Y:?iN:.;?jj;v':?J:S^;;?:`}_`Y.,?+ryYl J?i\?Yti?\
• v?:iti?'l,}?J":N+::?Y;C•: ?: -'v.:. Cy:X'1.; ?,yXJL?t•?C
?ti }Y x{\Y •CJ?l.:\\S:l?fY):k>:T:::>::<}:\??-}x ..<. :}.•...(:.>.:y:y?.}
x? tx ^
•ti ,M1{j?.+C.?''{5
i `rti:{:X..?.?:.1C.Y{TCY.+v}:i:CY"{ti JC'Yi YS\': LY:{.
;. a}. .Akt h.}:,>,ix}. }A a'x}.1:{:. T•}.-, fx?? ,r_
.ATk
:1 \xa'?. J:'c?.c}.'C:c,{x,n:s,?:?C?:Cs,'{4-'nr+^'-x%'??•+?.s',? ?np??.??:},r+.c
• .fJ:+' '{}::: ^)'{:u T'4ni'{k .{.C:'{:{??.{n <ri \{,'C {i:
:{ti'E+C+r.{:t N
?JC?.{:C}
3C•,:{y':Y Y }\rY3,{ X }.+..?i{: C':1vS'<T.: i'? I?C.LS ?::{ J C`r?.{ X
>c?^C:CY.;j.Y,`.ics?"ti•n:CxY l,•Y",,n.•AY.
• TM':Jril?i?}?.\t!}a: n'.lr????ai ?ti:th+:,}?f }f }.r
• ~ ?'L/G'??uY- ?.<+'}y?:.::n<}Y:?'S}`?h}: TX ]C+jM1: }:C.}:i {j y'SJ:+K y:?"?.?:
' 1•' }%):S:?:v?:{}'}Yv}'T:>:).f?:T?y:}JJC(.'Y. h<Y?i\J.SYY}%?:,
? -?-- ?-.s??Y?}J:.t`•'???JA,?,?Y,T??'y?,Yl?, .?,V-;\},;,?}?cY???w`},w.
. • "ti}CY.':C -r`?^Y{%y4`}C'r.{\...?:.'{:'CicY:ttiJ??x:<: ?,tiy:f}c)ti'YY{}c
Reinforced Channel -??';'.• :ti
• ti.SY}:;-v'\TC.Y. }:i r+iYY. i:!'ii:{}: S v+.:<>i}:JV v{i: }:i v`:<}:>v v\:{ }.; •v vy}•
Level Spreader Lip !\ #57 Stone on Fabric
Length = 13' to 130'
(parallel to contour lines)
Figure 8-2:
Profile View of a Level Spreader (adapted from, Hathaway 2006)
Level Spreader IJp
(prt!'<'>{x• 3' Layer<of
Flow P ##57'Stonp.
Channel s
Underdrarn - Sued ? '
for 5rtc Soil
Condrt;=5 - brain
Into Bypasr,:5tivale
Riparian Buffer
/ or Titer Strip
3 ft -Wide
5tnp of
Fdtar Fabric
Appropnately Sued
Concrete Footer
Reinforced Swale
(necessary if level
spreader is designed for
the 1 in/hr storm)
Level Spreader 8-2 July 2007
LEVEL SPREADER CONSTRUCTION SEQUENCE
CONTRACTOR SHALL ENSURE THAT THE LEVEL SPREADER,
FOREBAY, AND FILTER STRIP ARE PROTECTED FROM SEDIMENT
AND STORMWATER RUNOFF FROM UNSTABLIZED AREAS.
THEREFORE, IT IS RECOMMENDED THAT THE LEVEL SPREADER
BE CONSTRUCTED AS NEAR THE END OF CONSTRUCTION AND
AFTER THE SITE HAS BEEN STABILIZED, AND AFTER THE
SEDIMENT PITS HAVE SERVED THEIR FUNCTION AND HAVE BEEN
REMOVED. ONCE THE SEDIMENT PITS HAVE BEEN REMOVED THE
AREA SHALL BE GRADED SMOOTH AND EVEN IN ACCORDANCE
WITH THE LEVEL SPREADER DETAIL. THE AREA SHALL BE
STABILIZED AS SOON AS POSSIBLE. SODDING IS
RECOMMENDED, BUT AT A MINIMUM A MATTING SHALL BE
APPLIED OVER THE FRESHLY SEEDED AND MULCHED AREA. A
TEMPORARY STORMWATER DIVERSION MAY BE NECESSARY
UNTIL THE LEVEL SPREADER HAS FULLY STABILIZED AND
GROUND COVER HAS BEEN ESTABLISHED.
2. PRIOR TO CONSTRUCTION OF THE LEVEL SPREADER,
CONTRACTOR TO VERIFY THAT GROUND CONTOURS ARE
PARALLEL TO THE LEVEL SPREADER LOCATION AS SHOWN ON
THE PLANS, SLOPES ARE LESS THAN 6 TO 8 PERCENT, AND THAT
NO DRAWS ARE LOCATED IN THE FILTER STRIP ADJACENT TO THE
LEVEL SPREADER. ALSO, CONTRACTOR SHALL VERIFY THAT THE
LEVEL SPREADER IS 50 FEET AWAY FROM THE STREAM IF IT IS
BEING INSTALLED IN AN AREA COVERED BY A RIPARIAN AREA
PROTECTION RULE.
3. PRIOR TO INSTALLATION OF THE LEVEL SPREADER, THE
VEGETATION OF THE FILTER STRIP SHALL BE ASSESSED BY THE
CONTRACTOR AS DENSELY VEGETATED OTHERWISE ADDITIONAL
PLANTINGS WILL NEED TO BE ADDED PRIOR TO THE
INSTALLLATION. IF GRASS COVER NEEDS TO BE RE-ESTABLISHED
IN THE FILTER STRIP, CONSTRUCTION MAY BE LIMITED TO THE
GROWING SEASON.
4. CONTRACTOR IS TO MAKE BEST EFFORTS TO ENSURE THAT THE
LEVEL SPREADER IS ACTUALLY LEVEL TO ENSURE A UNIFORM
DISTRIBUTION OF FLOW. THE LEVEL SPREADER SHALL BE
CONSTRUCTED ON MATERIAL COMPACTED TO 95% OF STANDARD
PROCTOR TEST LEVELS PRIOR TO SEEDING FOR THAT AREA NOT
CONSIDERED THE SEEDBED.
•'''' ENGINEERING
® CALCULATION SHEET
CLIENT 6rce- SUBJECT Prepared By
PROJECT No. Reviewed By
14
PAGE OF
Date
Date
y s
?i; F iM ?Ati , "Pm. ? M ?P17?(? j 4Cc ?? / ?) rtl
y'S!}::j. 1,,,,F _J'.(.... •%r i¢`?.~'r.:t'r`" {<. l.j (v :? 1 Ij
a
Formulating Pre- & Post- Development Hydrographs
utilize small watershed method & center-weighted storm (Malcom)
Location Raleigh/Durham
Return Period 10 year
1= _... 722uin1hr !as<,rnes ., = min. dhect lae;c )
Cpre 0.3 (Rational C, see adjoining table)
Cpost 0.417
A= 2.870` acre
A= 125000' a; Rainfall 19tSin (6 hr Depth)
Qpre= 6.2= cfs
Qpost= 8.6cfs
Vol - Pre 15139 cf (total pre-development runoff volume)
Vol - Post 21637 rf (total post-development runoff volume)
Tpre 29 'ruin Time of Concentration Check (Kirpich Tc Equation)
Tpost 30 min Predevelopment
L 700 ft (Length of Overland Flow)
S 0.035 ft/ft (average overland slope)
tc 44GImin bare soil
zt ??°7ime)?0
I? post
tc 8Qmin grassed
,.. .. mrrr... , m ?
0 0.00 0.00 Post Development
1 0.02 0.02 L 700 ft (Length of Overland Flow)
2 0.07 0.09 S 0`0285' ft/ft (average overland slope)
3 0.16 0.21 tc . 4,79 min bare soil
4 0.28 0.37 tc 1 92 min asphalt/concrete
5 0.44 0.58
6 0.63 0.82 Note: Compare this to a 5 minute minimum.
7 0.84 1.11
8 1.08 1.43
9 1.35 1.78
10 1.63 2.16
11 1.93 2.56
12 2.25 2.98
13 2.58 3.42
14 2.91 3.86
15 3.24 4.32
16 3.57 4.77
17 3.90 5.21
18 4.22 5.65
19 4.53 6.07
20 4.81 6.47
21 5.08 6.85
22 5.33 7.21
23 5.55 7.53
24 5.74 7.81
25 5.90 8.06
26 6.03 8.26
27 6.13 8.43
28 6.19 8.54
29 6.22 8.62
30 6.21 8.64
31 6.16 8.62
32 6.08 8.55
33 5.96 8.43
34 5.81 8.27
35 5.63 8.07
36 5.42 7.82
37 5.20 7.54
38 4.97 7.24
39 4.75 6.93
40 4.55 6.64
41 4.35 6.35
42 4.16 6.08
43 3.98 5.83
44 3.80 5.58
45 3.64 5.34

WA?
• 03.E .??'
NCDENR -
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 Ill) must be printed, filled out and submitted along with all of the required information.
h PROJEOTINFORMATIONs'
Project name
Contact name --"
Phone number e
Date a
Drainage area number
(L. DESIIGWNFOR. MA°TION, - - - - -_--
For Level Spreaders Receiving Flow From a BMP
Type of BMP
Drawdown flow from the BMP
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 bioretention cell?
To a wetland?
To a filter strip or riparian buffer?
Other (specify)
6 ? ... Orr-i ku<f.y
cfs
$2 ?G t'C 5
/tar
;;^?':
?? ft2
G
?
/
? A !rte

/. ?Z cfs
min
in/hr
cfs
(Y or N)
(Y or N)
i
(Y or N)
Filter Strip or Riparian Buffer Characterization (if applicable)
Width of grass ft
Width of dense ground cover it
Width of wooded vegetation it
Total width It
Slope (from level lip to to top of bank) %
Are any draws present? (Y or N)
Level Spreader Design
Forebay surface area ..j sq It
Feet of level lip needed per cfs ft/cfs
Answer "Y" to one of the following:
Length based on the 1 in/hr storm? (Y or N)
Length based on the 10-yr, 24-hr storm? (Y or N)
Length based on the BMP discharge rate? (Y or N)
Design flow ; C. cfs
Is a bypass device provided? KI (Y or N)
Length of the level lip )) It
Are level spreaders in series? r - (Y or N)
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.3 Parts I. and It. Design Summary, page 1 of 2
I`Ilr REGUIRED ITEMS, CHECKLIST
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will
result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to
indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Page/ Plan
Ini ial4 Sheet No.
"
'
1. Plans (1
50
or larger) of the entire site showing:
Design at ultimate build-out,
Off-site drainage (if applicable),
Delineated drainage basins (include Rational C coefficient per basin),
Forebay (if applicable),
High flow bypass system,
Maintenance access,
Recorded drainage easement and public right of way (ROW), and
Boundaries of drainage easement.
"
'
2. Plan details (1
= 30
or larger) for the level spreader showing:
Forebay (if applicable),
High flow bypass system,
One foot topo lines between the level lip and top of stream bank,
Recorded drainage easement, and
Design at ultimate build-out.
J
"
'
3. Section view of the level spreader (1
= 20
or larger) showing:
Underdrain system (if applicable),
Level lip,
Upslope channel, and
Downslope filter fabric.
4. A date-stamped photograph of the filter strip that clearly shows the type of vegetation thatis present.

S. An assurance that the installed system will meet design specifications upon initial operation once the
project is complete and the entire drainage area is stabilized.
A
i
6.
construct
on sequence that shows how the level spreader will be protected from sediment until the entire
drainage area is stabilized.

7. The supporting calculations.
8
A co
of the si
ed
d n
t
i
d i
d
i
ti
.
py
gn
an
o
ar
ze
nspec
on an
ma
ntenance (I&M) agreement.

9. A copy of the deed restriction.
H
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.3 Part III, page 1 of 1

F. ;J s r R -
1?g?,r

Permit Number:
(to be provided by DWQ)
Drainage Area Number:
Filter Strip, Restored Riparian Buffer and Level Spreader
Inspection and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the 13W.
Important maintenance procedures:
- Immediately after the filter strip is established, any newly planted vegetation
will be watered twice weekly if needed until the plants become established
(commonly six weeks).
- Once a year, the filter strip will be reseeded to maintain a dense growth of
vegetation
- Stable groundcover will be maintained in the drainage area to reduce the
sediment load to the vegetation.
- Two to three times a year, grass filter strips will be mowed and the clippings
harvested to promote the growth of thick vegetation with optimum pollutant
removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches and
may be allowed to grow as tall as 12 inches depending on aesthetic requirements
(NIPC,1993). Forested filter strips do not require this type of maintenance.
- Once a year, the soil will be aerated if necessary.
- Once a year, soil pH will be tested and lime will be added if necessary.
After the filter strip is established, it will be inspected quarterly and within 24 hours
after every storm event greater than 1.0 inch (or 1.5 inches if in a Coastal County).
Records of inspection and maintenance will be kept in a known set location and will be
available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
The entire filter strip
Potential problem:
Trash/debris is present.
How I will remediate the
Remove the trash/debris.
The flow sputter device
(if applicable)
The flow splitter device is
The flow sputter device is
damaged.
Unclog the conveyance and dispose
of any sediment off-site.
Make any necessary repairs or
replace if damage is too large for
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer I&M-Rev2 Page 1 of 3
BMP element: Potential problem: How I will remediate the problem:
The Swale and the level The swale is clogged with Remove the sediment and dispose
lip sediment. of it off-site.
The level lip is cracked, Repair or replace lip.
settled, undercut, eroded or
otherwise damaged.
There is erosion around the Regrade the soil to create a berm
end of the level spreader that that is higher than the level lip, and
shows stormwater has then plant a ground cover and
bypassed it water until it is established. Provide
lime and a one-time fertilizer
a lication.
Trees or shrubs have begun Remove them.
to grow on the Swale or just
downslo e of the level lip.
The bypass channel Areas of bare soil and/or Regrade the soil if necessary to
erosive gullies have formed. remove the gully, and then
reestablish proper erosion control.
Turf reinforcement is Study the site to see if a larger
damaged or ripap is rolling bypass channel is needed (enlarge if
downhill. necessary). After this, reestablish
the erosion control material.
The filter strip Grass is too short or too long Maintain grass at a height of
if applicable). -approximately three to six inches.
Areas of bare soil and/or Regrade the soil if necessary to
erosive gullies have formed. remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
Sediment is building up on Remove the sediment and
the filter strip. restabilize the soil with vegetation if
necessary. Provide lime and. a one-
time fertilizer application.
Plants are desiccated. Provide additional irrigation and
fertilizer as needed.
Plants are dead, diseased or Determine the source of the
dying. problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application.
Nuisance vegetation is Remove vegetation by hand if
choking out desirable species. possible. If pesticide is used, do not
allow it to get into the receiving
water.
The receiving water Erosion or other signs of Contact the NC Division of Water
damage have occurred at the Quality local Regional Office, or the
outlet. 401 Oversight Unit at 919-733-1786.
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer I&M-Rev. 2 Page 2 of 3
Permit Number:
(to be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the 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.
Project name:
C
BAIT drainage area number:
Print name:
Title:

Address: o ? % S r J- E- <f G'? ?%u N '/C- ? ;7_626)
Phone: J 4A; - q ?d 4
Signature:
Date:
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, • , a Notary Public for the State of
??i??t? 1 L(?Y I n' acounty of, DhYlSiT)n , do hereby certify that
_ aIME S ?_I G5cLm b personally appeared before me this
day of , and acknowledge the due execution of the
forgoing filter strip, riparian buffer, and/or level spreader maintenance requirements
Witness my hand and official seal,
r
%%%?V Y A. GF ??
?,•?OTARy
My COMM.. Expires
V
=boy • ?us???••? ??;'
11"ITON
SEAL
My commission expires I
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer I&M-Rev.2 Page 3 of 3

NCDENR Stormwater BMP Manual
Figure 8-1:
Chapter Revised 09-28-07
Plan View of a Level Spreader (adapted from Hathaway 2006)
Filter Strip: Could be a riparian buffer, vegetated
Flow Bypass filter strip or restored riparian buffer.
_
Structure
Receivin

/?- hICCS/C.'D f}:\ :n .'<:n ti,.'n?:,`.}.+Yrt.? `..; •'>-` ?'\n' ?` ^ ,::......ti
}:>;:;
{};
;??? g

Stream
;
Y
? W. l1A
i lUyh2:-V.'-\'i??'My\.1^}@.? ..?j;:•IJ:?Y-
•
-
`n Y''AS ns ??^"'\ ^;}gin kin;{n\}:'.+i'-\titi{i.?n ^:.{?
From Watershed
Reinforced Swale
:::?a•.••:?•.,} .. ">?* ?U?? 5 .: xx.-., ,'• (necessary if level
• :fix}+Y??:,ytiY ::,.,:-,?,?.,:.,,,4,.::.:,?
, ... , >'>'iw,.•.-} spreader is designed for
V
,:;?;:;_;.,.:\,n„ ? •:;+:.? •?;,? the 1 in/hr storm)
F
b
ore
ay ''ti' {F?tixy.:?,fti+:eY.:.•'{7.+?s:;^:?.rtixr?::S-.tiv?: txv ? vi:.•':c.:}V.
ti
a
. •ti
.ti
v• ...t: 1Y.y: •{:{:CY.i....
•Y1': •: v
4\ y
- f•' 'K}'}YY}?:;j:Yt`}}1>.}:C>. Y.{}Y}%:}i}:C:}.i }.?.1'Y??}
' :?' /dlcJ>{^;':cacx;;x}f^>:C.'>?%4?<x??:Y+x •<>{x'
i .':lYY{'t>'Y\'.}Y:Lti}ti.^fli';: }'\tyx{`<9'iYY}ti `CY.{%t. n'l:Y`C!C}\'\"l{Y
?r'""?Y`+tif- %{may' ,, ?r^" '
Reinforced Channel ^ y stns hj riR
-?'.. .y tikxx -? >.,.':+rY.•:}a z3:}A:.,'Ya=1 +ca.7•;?...n•r:.>. r.:,JY:
' f ^(,:{}'Y'i}'1 <>':.lin}•:YJ+'-'?:<}:.. ?>'iY}}4>:^:{Y.;"}'-t ..•?+th?C}'h
1 •<. :•vv\:.r.}y...i: triv i:+-iv',.;>:}:i:>:.{>;>::'vi:{}i>v'v::<>-: vJ
Level Spreader Lip #57 Stone on Fabric
Length = 13' to 130'
(parallel to contour lines)
Figure 8-2:
Profile View of a Level Spreader (adapted from, Hathaway 2006)
Level Spreader lap
(6 4 N"?x- 3' Lager of
flow P j /?#5T5tonc
Riparian-Buffer
i./ cifyor Filter Strip
Channel
3 ft •Widc
Underdram - 5=ei Stnp of
for 5rtc Sod PiIter t-atrnc
C.ondrtaoas - brain AppropnatelY 5aed
Into f3ypaw'-9waie Concrete Footer
Level Spreader 8-2
July 2007

LEVEL SPREADER CONSTRUCTION SEQUENCE
CONTRACTOR SHALL ENSURE THAT THE LEVEL SPREADER,
FOREBAY, AND FILTER STRIP ARE PROTECTED FROM SEDIMENT
AND STORMWATER RUNOFF FROM UNSTABLIZED AREAS.
THEREFORE, IT IS RECOMMENDED THAT THE LEVEL SPREADER
BE CONSTRUCTED AS NEAR THE END OF CONSTRUCTION AND
AFTER THE SITE HAS BEEN STABILIZED, AND AFTER THE
SEDIMENT PITS HAVE SERVED THEIR FUNCTION AND HAVE BEEN
REMOVED. ONCE THE SEDIMENT PITS HAVE BEEN REMOVED THE
AREA SHALL BE GRADED SMOOTH AND EVEN IN ACCORDANCE
WITH THE LEVEL SPREADER DETAIL. THE AREA SHALL BE
STABILIZED AS SOON AS POSSIBLE. SODDING IS
RECOMMENDED, BUT AT A MINIMUM A MATTING SHALL BE
APPLIED OVER THE FRESHLY SEEDED AND MULCHED AREA. A
TEMPORARY STORMWATER DIVERSION MAY BE NECESSARY
UNTIL THE LEVEL SPREADER HAS FULLY STABILIZED AND
GROUND COVER HAS BEEN ESTABLISHED.
2. PRIOR TO CONSTRUCTION OF THE LEVEL SPREADER,
CONTRACTOR TO VERIFY THAT GROUND CONTOURS ARE
PARALLEL TO THE LEVEL SPREADER LOCATION AS SHOWN ON
THE PLANS, SLOPES ARE LESS THAN 6 TO 8 PERCENT, AND THAT
NO DRAWS ARE LOCATED IN THE FILTER STRIP ADJACENT TO THE
LEVEL SPREADER. ALSO, CONTRACTOR SHALL VERIFY THAT THE
LEVEL SPREADER IS 50 FEET AWAY FROM THE STREAM IF IT IS
BEING INSTALLED IN AN AREA COVERED BY A RIPARIAN AREA
PROTECTION RULE.
3. PRIOR TO INSTALLATION OF THE LEVEL SPREADER, THE
VEGETATION OF THE FILTER STRIP SHALL BE ASSESSED BY THE
CONTRACTOR AS DENSELY VEGETATED OTHERWISE ADDITIONAL
PLANTINGS WILL NEED TO BE ADDED PRIOR TO THE
INSTALLLATION. IF GRASS COVER NEEDS TO BE RE-ESTABLISHED
IN THE FILTER STRIP, CONSTRUCTION MAY BE LIMITED TO THE
GROWING SEASON.
4. CONTRACTOR IS TO MAKE BEST EFFORTS TO ENSURE THAT THE
LEVEL SPREADER IS ACTUALLY LEVEL TO ENSURE A UNIFORM
DISTRIBUTION OF FLOW. THE LEVEL SPREADER SHALL BE
CONSTRUCTED ON MATERIAL COMPACTED TO 95% OF STANDARD
PROCTOR TEST LEVELS PRIOR TO SEEDING FOR THAT AREA NOT
CONSIDERED THE SEEDBED.
ENGINEERING CALCULATION SHEET
CLIENT APRIP,&a SUBJECT
PROJECT No.
Arzx A, 4
PAGE
Prepared By Date
Reviewed By Date
?` = C? • ? `v ss.?
_ C:>4 dam'
M
OF
Formulating Pre- & Post- Development Hydrographs
utilize small watershed method & center-weighted storm (Malcom)
Location Raleigh/Durham
Return Perio d 10 year
1= ,, 7!t,', 2t 25-, n .s ., = 5 m ri. neck be;oty)
Cpre 0.35 (Rational C, see adjoining table)
Cpost 0.45
A= 0.980 acre
A= 42683 sf Rainfall ? 1`r3A9(3 in (6 hr Depth)
Qpre= 2.5 ' cfs
Qpost= cfs
Vol - Pre 5169 cf (total pre-development runoff volume)
Vol - Post 7708 cf (total post-development runoff volume)
Tpre 25 min Time of Concentration Check (Kirpich Tc Equation)
Tpost 29' min Predevelopment
L 700 ft (Length of Overland Flow)
S 0.036 ft/ft (average overland slope)
tc 4 35{ min bare soil
n fg: Tme
{r
? jsost tc 8,70" min grassed
'HON, ZEN W W
W? 7 W#01
0 0.00 0.00 Post Development
1 0.01 0.01 L 700 ft (Length of Overland Flow)
2 0.04 0.04 S 0.036- ft/ft (average overland slope)
3 0.09 0.08 tc 40min bare soil
4 0.15 0.15 tc 1?74min asphalt/concrete
5 0.24 0.23
6 0.33 0.32 Note: Compare this to a 5 minute minimum.
7 0.45 0.44
8 0.57 0.56
9 0.71 0.70
10 0.85 0.84
11 1.00 1.00
12 1.16 1.16
13 1.31 1.33
14 1.47 1.50
15 1.62 1.68
16 1.76 1.85
17 1.90 2.02
18 2.03 2.18
19 2.14 2.34
20 2.24 2.48
21 2.32 2.62
22 2.39 2.75
23 2.44 2.86
24 2.47 2.95
25 2.48 3.04
26 2.47 3.10
27 2.44 3.15
28 2.39 3.17
29 2.33 3.18
30 2.24 3.18
31 2.14 3.15
32 2.04 3.10
33 1.94 3.04
34 1.84 2.96
35 1.74 2.86
36 1.66 2.75
37 1.57 2.64
38 1.49 2.52
39 1.42 2.41
40 1.35 2.30
41 1.28 2.20
42 1.21 2.11
43 1.15 2.01
44 1.09 1.93
45 1.04 1.84
W Aa ,F pG
NCDENR
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 111) must be printed, filled out and submitted along with all of the required information.
IL. PROJ €CT? INFORMATIO fl
Project name
Contact name
Phone number s,F
Date
Drainage area number, , , -:, r )` S• y;= -? ¢ >?j Z1?
ll: 'DESIGN4NFORM"ATION: .
For Level Spreaders Receiving Flow From a BMP
Type of BMP
Drawdown flow from the BMP cfs
For Level Spreaders Receiving Flow from the Drainage Area
Drainage area ,
Impervious surface area ; l' - •f ft2
Percent impervious
Rational C coefficient D. SL5
Peak flow from the 1 in/hr storm cfs
Time of concentration /p min
Rainfall intensity, 10-yr storm ZZ in/hr
Peak flow from the 10-yr storm 3 2 cis
Where Does the Level Spreader Discharge?
To a bioretention cell? (Y or N)
To a wetland? 4 (Y or N)
To a filter strip or riparian buffer? (Y or N)
Other (specify)
Filter Strip or Riparian Buffer Characterization (if applicable)
Width of grass ft
Width of dense ground cover ft
Width of wooded vegetation it
Total width ft
Slope (from level lip to to top of bank) %
Are any draws present? (Y or N)
Level Spreader Design
Forebay surface area 1' sq ft
Feet of level lip needed per cis ft/cfs
Answer "Y" to one of the following:
Length based on the 1 in/hr storm? (Y or N)
Length based on the 10-yr, 24-hr storm? __ (Y or N)
Length based on the BMP discharge rate? (Y or N)
Design flow cfs
Is a bypass device provided? (Y or N)
Length of the level lip ft
Are level spreaders in series? (Y or N)

Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.3 Parts I. and II. Design Summary, page 1 of 2
III. REQUIRED, ITEMS CHECKLIST
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will
result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to
indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Page/ Plan
Ini ' Sheet No.

a? r
Plans (1" - 50' or larger) of the entire site showing:
Design at ultimate build-out,
Off-site drainage (if applicable),
Delineated drainage basins (include Rational C coefficient per basin),
Forebay (if applicable),
High flow bypass system,
Maintenance access,
Recorded drainage easement and public right of way (ROW), and
Boundaries of drainage easement.
2. Plan details (1" = 30' or larger) for the level spreader showing:
Forebay (if applicable),
High flow bypass system,
One foot topo lines between the level lip and top of stream bank,
Recorded drainage easement, and
Design at ultimate build-out.
3. Section view of the level spreader (1" = 20' or larger) showing:
Underdrain system (if applicable),
Level lip,
Upslope channel, and
Downslope filter fabric.
4. A date-stamped photograph of the filter strip that clearly shows the type of vegetation that-is present.
5. An assurance that the installed system will meet design specifications upon initial operation once the
project is complete and the entire drainage area is stabilized.
6. A construction sequence that shows how the level spreader will be protected from sediment until the entire
drainage area is stabilized.
7. The supporting calculations.
8. A copy of the signed and notarized inspection and maintenance (I&M) agreement.
9. A copy of the deed restriction.
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.3 Part 111, page 1 of 1
RJP6 Pl* I
e f
'AIM
71
A
'zo
'Ap
$Who,
es"
- -ilk -X%t I

Permit Number:
( t o be provided by DWQ)
Drainage Area Number: 4
Filter Strip, Restored Riparian Buffer and Level Spreader
Inspection and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMF.
Important maintenance procedures:
- Immediately after the filter strip is established, any newly planted vegetation
will be watered twice weekly if needed until the plants become established
(commonly six weeks).
- Once a year, the filter strip will be reseeded to maintain a dense growth of
vegetation
- Stable groundcover will be maintained in the drainage area to reduce the
sediment load to the vegetation.
- Two to three times a year, grass filter strips will be mowed and the clippings
harvested to promote the growth of thick vegetation with optimum pollutant
removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches and
may be allowed to grow as tall as 12 inches depending on aesthetic requirements
(NIPC, 1993). Forested filter strips do not require this type of maintenance.
- Once a year, the soil will be aerated if necessary.
- Once a year, soil pH will be tested and lime will be added if necessary.
After the filter strip is established, it will be inspected quarterly and within 24 hours
after every storm event greater than 1.0 inch (or 1.5 inches if in a Coastal County).
Records of inspection and maintenance will be kept in a known set location and will be
available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element: Potential roblem: How I will remediate the robiem:
The entire filter strip Trash/debris is present. Remove the trash/debris.
s stem
The flow sputter device The flow sputter device is Unclog the conveyance and dispose
(if applicable) clo ed. of an sediment off-site.
The flow sputter device is Make any necessary repairs or
damaged. replace if damage is too large for
repair.
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer IBrM-Rev.2 Page 1 of 3
BMP element: Potential problem: How I will remediate the problem:
The swale and the level The swale is clogged with Remove the sediment and dispose
lip sediment. of it off-site.
The level lip is cracked, Repair or replace lip.
settled, undercut, eroded or
otherwise damaged.
There is erosion around the Regrade the soil to create a berm
end of the level spreader that that is higher than the level lip, and
shows stormwater has then plant a ground cover and
bypassed it water until it is established. Provide
lime and a one-time fertilizer
application.
Trees or shrubs have begun Remove them.
to grow on the swale or just
downslo e of the level lip.
The bypass channel Areas of bare soil and/or Regrade the soil if necessary to
erosive gullies have formed. remove the gully, and then
reestablish proper erosion control.
Turf reinforcement is Study the site to see if a larger
damaged or ripap is rolling bypass channel is needed (enlarge if
downhill. necessary). After this, reestablish
the erosion control material.
The filter strip Grass is too short or too long Maintain grass at a height of
ti applicable). -approximately three to six inches.
Areas of bare soil and/or Regrade the soil if necessary to
erosive gullies have formed. remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
Sediment is building up on Remove the sediment and
the filter strip. restabilize the soil with vegetation if
necessary. Provide lime andj a one-
time fertilizer application.
Plants are desiccated. Provide additional irrigation and
fertilizer as needed.
Plants are dead, diseased or Determine the source of the
dying. problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application.
Nuisance vegetation is Remove vegetation by hand if
choking out desirable species. possible. If pesticide is used, do not
allow it to get into the receiving
water.
The receiving water Erosion or other signs of Contact the NC Division of Water
damage have occurred at the Quality local Regional Office, or the
outlet 401 Oversight Unit at 919-733-1786.
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer I&M-Rev2 Page 2 of 3
Permit Number:
(to be provided by DWO)
I acknowledge and agree by my signature below that I am responsible for the
performance of the 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.
Project name:
BMP drainage area number-._
Print name:
Title: ?,1????'i
Address: S??7
Phone:
Signati
Date:
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.
a Notary Public for the State of
0', aCounty of n;s iT? n , do hereby certify that
Lt O5rzM 1 personally appeared before me this
day of , , and acknowledge the due execution of the
forgoing filter strip, riparian buffer, and/or level spreader maintenance requirements
Witness my hand and official seal,
..?oTaRy ? ?;
_ my comn. Expires
s7`ON G0%
s ) ""J'90 sell0%
SEAL
My commission expires
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer I&M-Rev.2 Page 3 of 3
NCDENR Stormwater BMP Manual
Figure 8-1:
Chapter Revised 09-28-07
Plan View of a Level Spreader (adapted from Hathaway 2006)
Filter Strip: Could be a riparian buffer, vegetated
Flow Bypass filter strip or restored riparian buffer.
Structure Receiving
/k--s iiCCDG77 };tis`:: ?': `.{?'`.r :;:: ?::;":::`:<•.•'?+?:`;?::`T•}:; ::fit ?ti;?',`.y::?
Stream
From Watershed
S,
. i1

f?
5
:ill/Z-- 'O & e
2 C .?a? .?:?Ywy
Reinforced Swale
(necessary if level
spreader is designed for
the 1 in/hr storm)
:'ti // `?cr,'?••-?:?c^•`,-":Yeti.?z'v-:,;CA'?!':.e.:c(:?.s3c.?M:c':
Y- XXX IO/L ?S%s''.{?{%{\?K}',nX:?:tjt%.\'t-:?>':{.{`•'Yt'^}'C:t}fn.
Reinforced Channels sy cti^'`w`rr` ftif` `
^
..X f
}vv\%.}:.`v v:}
Level Spreader Lip #57 Stone on Fabric
Length = 13' to 130'
(parallel to contour lines)
Figure 8-2:
Profile View of a Level Spreader (adapted from, Hathaway 2006)

Level Spreader Lip- t
{o Mu??` 3` layer of
r -#57'Stone
Flow P'
RipariarrBuffier
_
or Filter Strip;
--
?
l
j
chine!
„ r
?
f 3 it Willa
Underdram - 5ued Strip of
For SEtc-sod altar Fabric.
Condrbcn5 - Drain Appropnately Sized
Into 5ypaw_5uwale Concrete Footer
Forebay
Level Spreader 8-2 July 2007
LEVEL SPREADER CONSTRUCTION SEQUENCE
CONTRACTOR SHALL ENSURE THAT THE LEVEL SPREADER,
FOREBAY, AND FILTER STRIP ARE PROTECTED FROM SEDIMENT
AND STORMWATER RUNOFF FROM UNSTABLIZED AREAS.
THEREFORE, IT IS RECOMMENDED THAT THE LEVEL SPREADER
BE CONSTRUCTED AS NEAR THE END OF CONSTRUCTION AND
AFTER THE SITE HAS BEEN STABILIZED, AND AFTER THE
SEDIMENT PITS HAVE SERVED THEIR FUNCTION AND HAVE BEEN
REMOVED. ONCE THE SEDIMENT PITS HAVE BEEN REMOVED THE
AREA SHALL BE GRADED SMOOTH AND EVEN IN ACCORDANCE
WITH THE LEVEL SPREADER DETAIL. THE AREA SHALL BE
STABILIZED AS SOON AS POSSIBLE. SODDING IS
RECOMMENDED, BUT AT A MINIMUM A MATTING SHALL BE
APPLIED OVER THE FRESHLY SEEDED AND MULCHED AREA. A
TEMPORARY STORMWATER DIVERSION MAY BE NECESSARY
UNTIL THE LEVEL SPREADER HAS FULLY STABILIZED AND
GROUND COVER HAS BEEN ESTABLISHED.
2. PRIOR TO CONSTRUCTION OF THE LEVEL SPREADER,
CONTRACTOR TO VERIFY THAT GROUND CONTOURS ARE
PARALLEL TO THE LEVEL SPREADER LOCATION AS SHOWN ON
THE PLANS, SLOPES ARE LESS THAN 6 TO 8 PERCENT, AND THAT
NO DRAWS ARE LOCATED IN THE FILTER STRIP ADJACENT TO THE
LEVEL SPREADER. ALSO, CONTRACTOR SHALL VERIFY THAT THE
LEVEL SPREADER IS 50 FEET AWAY FROM THE STREAM IF IT IS
BEING INSTALLED IN AN AREA COVERED BY A RIPARIAN AREA
PROTECTION RULE.
3. PRIOR TO INSTALLATION OF THE LEVEL SPREADER, THE
VEGETATION OF THE FILTER STRIP SHALL BE ASSESSED BY THE
CONTRACTOR AS DENSELY VEGETATED OTHERWISE ADDITIONAL
PLANTINGS WILL NEED TO BE ADDED PRIOR TO THE
INSTALLLATION. IF GRASS COVER NEEDS TO BE RE-ESTABLISHED
IN THE FILTER STRIP, CONSTRUCTION MAY BE LIMITED TO THE
GROWING SEASON.
4. CONTRACTOR IS TO MAKE BEST EFFORTS TO ENSURE THAT THE
LEVEL SPREADER IS ACTUALLY LEVEL TO ENSURE A UNIFORM
DISTRIBUTION OF FLOW. THE LEVEL SPREADER SHALL BE
CONSTRUCTED ON MATERIAL COMPACTED TO 95% OF STANDARD
PROCTOR TEST LEVELS PRIOR TO SEEDING FOR THAT AREA NOT
CONSIDERED THE SEEDBED.
Office Use Only:
Form Version March OS
USACE Action ID No. DWQ No. D V (p S V 3
(If any particular item is not applicable to this project, please enter "Not Applicable" or "N/A".)
1. Processing
1. Check all of the approval(s) requested for this project:
© Section 404 Permit
Section 10 Permit El Riparian or Watershed Buffer Rules
401 Water Quality Certification ? Isolated Wetland Permit from DWQ
? Express 401 Water Quality Certification
2. Nationwide, Regional or General Permit Number(s) Requested:
3q _
3. If this notification is solely a courtesy copy because written approval for the 401 Certification
is not required, check here: ?
4. If payment into the North Carolina Ecosystem Enhancement Program (NCEEP) is proposed
for mitigation of impacts, attach the acceptance letter from NCEEP,
and check here: ? complete section VIII,
5. If your project is located in any of North Carolina's twenty coastal counties (listed on page
4), and the project is within a North Carolina Division of Coastal Management Area of
Environmental Concern (see the top of page 2 for further details), check here: ?
Applicant Information
1. Owner/Applicant Information
Name:
Mailing Address: IJ o. i z s scar
II.
C
Telephone Number: ::L2_Z-476
Fax Number:-
E-mail Address.-
2- Agent/Consultant Information (A signed and dated copy of the Agent Authorization letter
must be attached if the Age has ignatory authority for the owner/appl
Name: icant.)
Company Affiliation:',
Mailing Address-
-----------
Telephone Number: e zy 7,,&
E-mail Address: r- ?rX7/?;
Page 5 of 12
Fax Number:
_,y' ;?&? -
III. Project Information
Attach a vicinity map clearly showing the location of the property with respect to local
landmarks such as towns, rivers, and roads. Also provide a detailed site plan showing property
boundaries and development plans in relation to surrounding properties. Both the vicinity map
and site plan must include a scale and north arrow. The specific footprints of all buildings,
impervious surfaces, or other facilities must be included. If possible, the maps and plans should
include the appropriate USGS Topographic Quad Map and NRCS Soil Survey with the property
boundaries outlined. Plan drawings, or other maps may be included at the applicant's discretion,
so long as the property is clearly defined. For administrative and distribution purposes, the
USACE requires information to be submitted on sheets no larger than 11 by 17-inch format;
however, DWQ may accept paperwork of any size. DWQ prefers full-size construction
drawings rather than a sequential sheet version of the full-size plans. If full-size plans are
reduced to a small scale such that the final version is illegible, the applicant will be informed that
the project has been placed on hold until decipherable maps are provided.
1. Name of project: s" R a
2. T.I.P. Project Number or State Project Number (NCDOT Only):
3. Property Identification Number (Tax PIN): t (O's 5 DO -s 5 - q
4. Location
County: O?Av'\ 5tVV% Nearest Town:
Subdivision name (include phase/lot number):`
Directions to site (include roadi numbers/names, landmarks, etc.):
L,> E-'. '?.l 4T?d1 ir'b.°4.?LC ?d Sc'3_ °t Y=', R gay d..Pl. Y^ ?..-..ice t MF"?. f,
5. Site coordinates (For linear projects, such as a road or utility line, attach a sheet that
separately lists the coordinates for each crossing of a distinct waterbody.)
Decimal Degrees (6 digits minimum): -55. S5 I'D °N M. ?&-A. °W
6. Property size (acres):
7. Name of nearest receiving body of water:
F L
8. RiverBasin:-"?
(Note - this must be one of North Carolina's seventeen designated major river basins. The
River Basin map is available at http://h2o.enr.state.nc.us/admin/mgps/.)
9. Describe the existing conditions on the site and general land use in the vicinity of the project
at the time of this application : % ok-i°'w\ _41 _ M i
Page 6 of 12
10. Describe the overall project in detail, including thetype of equipment to be used:
11. Explain the purpose of the proposed work: z
a
IV. Prior Project History
If jurisdictional determinations and/or permits have been requested and/or obtained for this
project (including all prior phases of the same subdivision) in the past, please explain. Include
the USACE Action ID Number, DWQ Project Number, application date, and date permits and
certifications were issued or withdrawn. Provide photocopies of previously issued permits,
certifications or other useful information. Describe previously approved wetland, stream and
buffer impacts, along with associated mitigation (where applicable). If this is a NCDOT project,
list and describe permits issued for prior segments of the same T.I.P. project, along with
construction schedules. no e?\J l OuS i. 'r vu
ILv)a62? ( 03,.sa 9- Pr C Kai-¢,. i - S&- k. ,.p --l a , A S
V. Future Project Plans
Are any future permit requests anticipated for this project? If so, describe the anticipated work,
and provide justification for the exclusion of this work fro the current application.
?' - CXO.45-i
elo-s1 Qy1 ?-J 61 K- C3A c0 V?L?,12 `? ;ems O.._ MS,
VI. Proposed Impacts to Waters of the United States/Waters of the State
It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to
wetlands, open water, and stream channels associated with the project. Each impact must be
listed separately in the tables below (e.g., culvert installation should be listed separately from
riprap dissipater pads). Be sure to indicate if an impact is temporary. All proposed impacts,
permanent and temporary, must be listed, and must be labeled and clearly identifiable on an
accompanying site plan. All wetlands and waters, and all streams (intermittent and perennial)
should be shown on a delineation map, whether or not impacts are proposed to these systems.
Wetland and stream evaluation and delineation forms should be included as appropriate.
Photographs may be included at the applicant's discretion. If this proposed impact is strictly for
wetland or stream mitigation, list and describe the impact in Section VIII below. If additional
space is needed for listing or description, please attach a separate sheet.
a writteln description of the proposed impacts;
Page 7 of 12
2. Individually list wetland impacts. Types of impacts include, but are not limited to
mechanized clearing, gading, fill, excavation, flooding, ditching/drainage, etc. For dams,
se arately list impacts due to both structure and flooding.
Wetland Impact
Site Number
(indicate on map)
Type of Impact Type of Wetland
(e.g., forested, marsh,
herbaceous, bog, etc.) Located within
100-year
Floodplain
(yes/no) Distance to
Nearest
Stream
(linear feet) Area of
Impact
(acres)
s ?res 0Ssor- M
_73'

Total Wetland Impact (acres)
U l6 (Z C)
3. List the total acreage (estimated) of all existing wetlands on the property: l 2-7 .
( -P*_ ?s T ) +.. 5 O_C? i n 0 P-6
4. Individually list all intermittent and perennial stream impacts. Be sure to identify temporary
impacts. Stream impacts include, but are not limited to placement of fill or culverts, dam
construction, flooding, relocation, stabilization activities (e.g., cement walls, rip-rap, crib
walls, gabions, etc.), excavation, ditching/straightening, etc. If stream relocation is proposed,
plans and profiles showing the linear footprint for both the original and relocated streams
must be included. To calculate acreage, multiply length X width, then divide by 43,560.
Stream Impact
Number
(indicate on ma)
Stream Name
Type of Impact Perennial or
Intermittent? Average
Stream Width
Before Impact Impact
Length
(linear feet) Area of
Impact
(acres)
4.1 l 2?,n?? 3 E 20 6,00B

Total Stream Impact (by length and acreage)
5. Individually list all open water impacts (including lakes, ponds, estuaries, sounds, Atlantic
Ocean and any other water of the U.S.). Open water impacts include, but are not limited to
fill, excavation, dredging, flooding, drainage, bulkheads, etc.
Open Water Impact
Site Number
(indicate on ma) Name of Waterbody
(if applicable)
Type of Impact Type of Waterbody
(lake, pond, estuary, sound, bay,
ocean, etc.) Area of
Impact
(acres)

Total Open Water Impact (acres)
Page 8 of 12
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A R
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A R

6. List the cumulative impact to all Waters of the U.S. resulting from the project:
Stream Impact (acres): 0.00?-
Wetland Impact (acres): (
-715-7 5 E p Ito
_
Open Water Impact (acres):
Total Impact to Waters of the U.S. (acres) ,
Total Stream Impact (linear feet): (2?
Isolated Waters
Do any isolated waters exist on the property? ? Yes CZ No
Describe all impacts to isolated waters, and include the type of water (wetland or stream) and
the size of the proposed impact (acres or linear feet). Please note that this section only
applies to waters that have specifically been determined to be isolated by the USACE.
8. Pond Creation
If construction of a pond is proposed, associated wetland and stream impacts should be
included above in the wetland and stream impact sections. Also, the proposed pond should
be described here and illustrated on any maps included with this application.
Pond to be created in (check all that apply): ? uplands ? stream ? wetlands
Describe the method of construction (e.g., dam/embankment, excavation, installation of
draw-down valve or spillway, etc.):
Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond,
local stormwater requirement, etc.):
Current land use in the vicinity of the pond:
Size of watershed draining to pond: Expected pond surface area:
VII. Impact Justification (Avoidance and Minimization)
Specifically describe measures taken to avoid the proposed impacts. It may be useful to provide
information related to site constraints such as topography, building ordinances, accessibility, and
financial viability of the project. The applicant may attach drawings of alternative, lower-impact
site layouts, and explain why these design options were not feasible. Also discuss how impacts
were minimized once the desired site plan was developed. If applicable, discuss. construction
techniques to be followed during construction to reduce impacts. -1. :?A u s Z ?) Q-6
i Qt a?. t 140 Pr?® Sp .Q. ; 2• G?dt C'f0 l i 5
1 v'&J E d1Lq..1 1 c }- OLO
VIII.
DWQ - In accordance with 15A NCAC 2H .0500, mitigation may be required by the NC
Division of Water Quality for projects involving greater than or equal to one acre of impacts to
freshwater wetlands or greater than or equal to 150 linear feet of total impacts to perennial
streams.
Page 9 of 12
USACE - In accordance with the Final Notice of Issuance and Modification of Nationwide
Permits, published in the Federal Register on January 15, 2002, mitigation will be required when
necessary to ensure that adverse effects to the aquatic environment are minimal. Factors
including size and type of proposed impact and function and relative value of the impacted
aquatic resource will be considered in determining acceptability of appropriate and practicable
mitigation as proposed. Examples of mitigation that may be appropriate and practicable include,
but are not limited to: reducing the size of the project; establishing and maintaining wetland
and/or upland vegetated buffers to protect open waters such as streams; and replacing losses of
aquatic resource functions and values by creating, restoring, enhancing, or preserving similar
functions and values, preferable in the same watershed.
If mitigation is required for this project, a copy of the mitigation plan must be attached in order
for USACE or DWQ to consider the application complete for processing. Any application
lacking a required mitigation plan or NCEEP concurrence shall be placed on hold as incomplete.
An applicant may also choose to review the current guidelines for stream restoration in DWQ's
Draft Technical Guide for Stream Work in North Carolina, available at
http://h2o.enr.state.nc.us/ncwetlands/strmgide.html.
1. Provide a brief description of the proposed mitigation plan. The description should provide
as much information as possible, including, but not limited to: site location (attach directions
and/or map, if offsite), affected stream and river basin, type and amount (acreage/linear feet)
of mitigation proposed (restoration, enhancement, creation, or preservation), a plan view,
preservation mechanism (e.g., deed restrictions, conservation easement, etc.), and a
description of the current site conditions and proposed method of construction. Please attach
a separate sheet if more space is needed.
2. Mitigation may also be made by payment into the North Carolina Ecosystem Enhancement
Program (NCEEP). Please note it is the applicant's responsibility to contact the ;NCEEP at
[phone] to determine availability, and written approval from the NCEEP indicating
that they are will to accept payment for the mitigation must be attached to this. form. For
additional information regarding the application process for the NCEEP, check the NCEEP
website at http://h2o.enr.state.nc.us/wr2/index.htm. If use of the NCEEP is proposed, please
check the appropriate box on page five and provide the following information:
Amount of stream mitigation requested (linear feet):
Amount of buffer mitigation requested (square feet):
Amount of Riparian wetland mitigation requested (acres):
Amount of Non-riparian wetland mitigation requested (acres):
Amount of Coastal wetland mitigation requested (acres):
Page 10 of 12
IX. Environmental Documentation (required by DWQ)
Does the project involve an expenditure of public (federal/state/local) funds or the use of
public (federal/state) land? Yes ? No 7
2. If yes, does the project require preparation of an environmental document pursuant to the
requirements of the National or North Carolina Environmental Policy Act (NEPA/SEPA)?
Note: If you are not sure whether a NEPA/SEPA document is required, call the SEPA
coordinator at [phone] to review current thresholds for environmental documentation.
Yes ? No [A
3. If yes, has the document review been finalized by the State Clearinghouse? If so, please
attach a copy of the NEPA or SEPA final approval letter. Yes ? No ?
X. Proposed Impacts on Riparian and Watershed Buffers (required by DWQ)
It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to
required state and local buffers associated with the project. The applicant must also provide
justification for these impacts in Section VII above. All proposed impacts must be listed herein,
and must be clearly identifiable on the accompanying site plan. All buffers must be shown on a
map, whether or not impacts are proposed to the buffers. Correspondence from the DWQ
Regional Office may be included as appropriate. Photographs may also be included at the
applicant's discretion.
1. Will the project impact protected riparian buffers identified within 15A NCAC 2B .0233
(Meuse), 15A NCAC 2B .0259 (Tar-Pamlico), 15A NCAC 02B .0243 (Catawba) 15A NCAC
2B .0250 Randleman Rules and Water Supply Buffer Requirements), or other (please
identify \0_?rS? )? Yes Q
No ?
Llaj
2. If "yes", identify the square feet and acreage of impact to each zone of the riparian buffers.
If buffer mitigation is required calculate the required amount of mitigation by applying the
buffer multipliers.
* Impact Required
Zone i-„- F ;-F1 Multiplier
I 1 I :37,44- 13 (2 for Catawba)
1 2 ?-7 (ran 1.5
Total I-7 Q I O 1 f
* Zone 1 extends out 30 feet perpendicular from the top of the near bank of channel; Zone 2 extends an
additional 20 feet from the edge of Zone 1.
If buffer mitigation is required, please discuss what type of mitigation is proposed (i.e.,
Donation of Property, Riparian Buffer Restoration / Enhancement, or Payment into the
Riparian Buffer Restoration Fund). Please attac appropriate information as identified
within 15A NCAC 2B .0242 or.0244, or .0260. icno)
Page 11 of 12
XI. Stormwater (required by DWQ)
Describe impervious acreage (existing and proposed) versus total acreage on the site. Discuss
stormwater controls proposed in order to protect surface waters and wetlands downstream from
the property. If percent impervious surface exceeds 20%, please provide calculations
demonstrating total proposed impervious level. 7g-/O,¢°,
,c?1_ / _ - akcv la ?77I N.E? E2 U S7LYt./ Cd .
XII. Sewage Disposal (required by DWQ)
Clearly detail the ultimate treatment methods and disposition (non-discharge or discharge) of
wastewater generated from the proposed project, or available capacity of the subject facility.
f S1/?,>?E2iSYZtjv?J? ?r)/t?? ?eN Co ?U!> l?Af?1>?sr? Tlto/
XIII. Violations (required by DWQ)
Is this site in violation of DWQ Wetland Rules (15A NCAC 2H.0500) or any Buffer Rules?
Yes ? No
Is this an after-the-fact permit application? Yes ? No E
XIV. Cumulative Impacts (required by DWQ)
Will this project (based on past and reasonably anticipated future impacts) result in additional
development, which could impact nearby downstream water quality? Yes ? No n
If yes, please submit a qualitative or quantitative cumulative impact analysis in accordance with
the most recent North Carolina Division of Water Quality policy posted on our website at
litti)://i2o.enr.state.iic.us/ncwetlands. If no, please provide a short narrative description:_AO,'
'L a ?E c fA ed 75[ ©G? l.?r/?/ ??xUS 9IZ ry
o??>,? G?s:f ,trL?dsd, AlJ ?/,(?! js?fl?o.UCLc fo zS? ' ' '" ?` ?o
XV. Other Circumstances (Optional):
It is the applicant's responsibility to submit the application sufficiently in advance of desired
construction dates to allow processing time for these permits. However, an applicant may
choose to list constraints associated with construction or sequencing that may impose limits on
work schedules (e.g., draw-down schedules for lakes, dates associated with Endangered and
Threatened Species, accessibility problems, or other issues outside of the applicant's control).
Applicant/ kent's Signature Date,
(Agent's signature is valid only if an authorization letter from the applicant is provided.)
Page 12 of 12
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0.09 0.18 0.27 0.36 0.45 mi
UTM 17 729602E 3936757N (NAD83/WGS84)
USGS Powhatan (NC) Quadrangle
Projection is UTM Zone 17 NAD83 Datum
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1 of 1 11/13/2007 1:17 PV
RESTRICTIVE COVENANT GUIDANCE
August, 2003
0 ten, developers of reaidentialorc an m erzaalsubd.>srisions sabjectthe property on
w hich the subdivision is builtto restive covenants, ihatinchlde pmvisions such as
setbacks, tees of ham es/baibings thatcan be built, etc. If the D istricthas deteun ined
thatr - -trictire covenants are acceptable as am eans ofpm3erving m itigation property, the
fDlbw ing language can b?, added those ms?e covenants:
y-----s?
as -
/` A OTC Ld?CWOoG? L`Sl?drieS Sa e'nd 3-30-?nr
T he areas show n on the recorded plat (dentify the platby t tle, date, and -
reco n inhg data) ?t ays shallbe m aintauhed in pe peirity Jn their
natural_orm ibgated cond bon. N o person orentLy shaltpertrm any of the
fDlbw ing ac : r±ies on such c on mxvatiDn area :
a. fill, grade, excavate orperforn any other land disturbing act:?ritias
b. cuts m ow , bum, ran ove, orharm any vegetation
c. constructorplace any roads, trails, w alkw ays, buildings, m obit
hen es, signs, utility poles ortow err, orany otherperm anentortan porary
s nict Ims
d. drain orotherw ise disn.rptoralterthe hydmbgy ordra> page ways of
the con----Lvat:bn area
e. dun p orstDre soil, trash, orotherw aste
f. graze orw ateranin ass, oruse fDrany agricuh.rralorhorbchai 1
purpo--e
T his cx>venantis intended tD ensum continued am p_uance w ith the m itigat Dn
condition of a C lean W aterA ctauthorizataon issued by the U nited States of
A mer a, U S. A mi y C orps o f E ng ins, W iln ington D istnc : Acton ID
, and therefore m ay be enforced by the U nit9i S testes of A m e>ica. T his covenant
is to nrn w ith the land, and shailbe binding on the 0 w ner, and allpardes chin ing
underit"
U sually, rest =tire covenants have a pmvisjon thatthe property ow ners (eitherallof
then or som e pe=tage of then ) can am end orm odify the nest ic;tive covenants. If that
is the cam, thatpmv=n needs to pmvide thatour i1equimd paragraph (usually identified
by paragraph nun ber) cannotbe an ended w ithoutthe express w ni en consentof the U _
S. A rm y C orps of Engineers, W ib ingt )n D istric .
The perm itcond-tion should state that the perm itiee w ill mcord resta:t-ve covenants,
actable to the C orps of Engineers, for the pure ofm a-hiaidig the m negation arms
in theirnatraralstate in perpetuity, prjortD the sale orconveyance of any lots orolher
pmperLy w ithoh the subdivision . ]his rot portantthatthe rest ict)ons be mcoried priortD
the saL- of any property w ih-in the s'abdivision (orphan, if ±is being devebped by
phase). If they are not, then any pmperty so]d priorb the inriing of the restrictive
covantantam notsub3ecttD those covenants. Suggest the fDl]ow ing:
"Pennittee shall execute and cause to be recorded in the County
Register of Deeds restrictive covenants acceptable to the Corps of Engineers for
the purpose of maintaining the conservation areas, as shown on the recorded
plat* (identify by title, date, and recording data), in their natural state in
perpetuity, prior to the sale or conveyance of any lots or other property within the
subdivision. The permittee shall enforce the terms of the restrictive covenants
and, prior to conveyance of the property, shall take no action on the property
described in the covenants inconsistent with the tenns thereof. The pennittee
shall provide a copy of the recorded restrictive covenants to the Corps of
Engineers within 15 days of recording."
* It is possible and acceptable that the plat may not be recorded at the time of the
issuance of the permit. If that is the case, delete the word "recorded" and be sure you
have a copy of a plat showing the conservation areas in the file, and identify it in the
permit condition by title and date. The plat, however, must be recorded at the time the
restrictive covenants are recorded, and prior to the sale of any lots in the subdivision.
2
The areas shown as conservation area on the final plat of Carriage Creek shall be
maintained in perpetuity in their natural or mitigated condition. No person or entity shall
perform any of the following activities on such conservation area: _
a. Fill, grade, excavate or perform any other land disturbing activities
b. Cut, mow, burn, remove or harm any vegetation
c. Construct or place any roads, trails, walkways, buildings, mobile homes, signs,
utility poles or towers or any permanent or temporary structures.
d. Drain or otherwise disrupt or alter the hydrology or drainage ways of the
conservation area
e. Dump or store soil, trash, or other waste
f. Graze or water animals, or use for any agricultural or horticultural purpose
This covenant is intended to ensure continued compliance with the mitigation condition
of a Clean water Act authorization issued by the United States of America, US Army
Corps of Engineers, Wilmington District, and Action ID and therefore may be enforced
by the US of America. This covenant is to run with the land, and shall be binding on the
owner and all parties claiming under it.
STORMWATER/EROSION CONTROL
CALCULATIONS
For
CARRIAGE CREEK SUBDIVISION PHASE 1
,? , • aQe .a®0 A
A s a 8 ?U'[
q?/???qVg''gqaagy' qQ
c ??o?V?A YOB p ®??'
Tom Hepler, PE
September 5, 2006
CH Engineering, PLLC
4601 Lake Boone Trail
Raleigh, NC 27607
Ph-919-788-0224
Fax-919-788-0232
Stormwater Statement For Carriage Creek Subdivision Phase 1
Subdivision: Carriage Creek Phase 1
Location: Located within Carriage Creek Subdivision . Phase 1 is located west of
Cleveland School Road (SR 1010) and south of Pollenta Road (SR 1330).
This site is NOT located within the Environmentally Sensitive Overlay
District.
Developer: Carriage Creek, LLC
P.O. Box 133
Clayton, NC 27528
Consultant: CH Engineering, PLLC
4601 Lake Boone Trail
Raleigh, NC 27607
GENERAL INFORMATION
Phase 1 contains approximately 8.53 Ac. The total subdivision's acreage is approximately
68.27 Ac.
Past uses of the property are farming and woodland. Phase 1 is bordered by a riparian
buffer to the west. One stream crossing with a subdivision roadway is encountered in this
phase. Neal Floyd Jr. & Associates is handling permitting with NCDENR for placement
of fill associated with roadway construction.
IMPERVIOUS SURFACE AREA-
Total Area Phase 1 8.53 Ac.
Total Area for Road Right of Way along Phase 1 1.02 Ac.
Residual Area for Lots 8.53 Ac. - (1.02Ac) = 7.51 Ac.
Average Acreage/Lot for 11 Lots 7.51Ac./11 Lots = .6827 Ac./Lot
= 29,740 SF/Lot
Lot Impervious Surface Area 2200 SF with a maximum impervious surface area
of 3086 SF
Lot Impervious Percentage
2200 SF/29740 SF/Lot 7.41 %
3086 SF/29740 SF/Lot 10.38% (maximum allowable impervious coverage is 12%)
Phase 1 of Carriage Creek Subdivision is single family residential. The streets will be
paved sections with shoulder and grassed swales. Surface runoff will be dissipated
wherever possible with level spreaders downstream of pipe outlets.
EXISTING DRAINAGEWAYS
A 50 ft. Buffer is placed along each side of the drainageway. Neuse River Riparian
design guides were followed for Phase 1. NCDENR is presently reviewing the roadway
crossing.
DOWNSTREAM AND UPSTREAM DRAINAGEWAYS
No impact is expected from phase 1 on Steep Hill Branch as this phase is approximately
0.88% of the drainage received by Steep Hill Branch.
F? Fps
? ?D G 7 i 3
DEPARTMENT OF PUBLIC UTILITIES i 's=
s
POST OFFICE BOX 2263 E JL e Q:7 L.5 U
z
February 15, 2007 SMITHFIELD, N_C. 27577 -------------- ------
Carriage Creek, LLC [phone]
PO Box 133
Clayton, NC 27528
Attn: Paul Flaherty
Re: Carriage Creek Subdivision-Phase UStormwater Management Statement and Plan
Dear Mr. Flaherty:
We have reviewed the revised Stormwater Management Plan and calculations submitted
for the proposed Carriage Creek Subdivision-Phase I. Based upon the information
submitted, the Stormwater Managementplan has been approved with the following
stipulations:
1. Future phases of the-development will require" a separate Stormwater Management
Plan approval. At fi4time, copies of the required 401/404'permits for any
proposed stream, crossing must be provided. In addition, all design calculations
for the proposed, 'crossing must be provided for review and approval.
2. Currently proposed Lots 7 & 6 may be affected by the future proposed road
crossing. Any future stream- crossingmust be designed to minimize impacts to
these lots.
3. Please provide drainage easements -on the Final Plat fWly encompassing the
proposed Level Spreaders
4. Please provide a copy py of the recorded restrictive covenants and a note on the, Final
Plat limiting the impervious area on each of the 1 I Lots to 3086 SF.
5. Please provide ,a copy of the recorded restrictive covenants noting who will be
responsible for mAln' tenance of all drainage facilities located outside of the '
proposed NCDOTigight of way
6. Prior to recordation of theE-inalPlat, please'provide an 8.5'xI 1" driveway culvert
size chart sealed and signe&by the'iengineer for ail lets`..
7. Prior to recordation oftthe Final. plat, please rov4de a stormwater certification
stating that all stormwater facilities -were constructed in accordance with the
approved stormwater management plan.
8. Please indicate all drainage easements, riparian buffers, jurisdictional wetlands,
and flood hazard areas on the Final Plat.
A copy of this letter will be forwarded to the Planning Office for their files. If you have
any questions or need additional information, please contact me at [phone] or by
email at Jennifer. wiI]ISO johnstonnc com.
Very Truly Yours,
Jennifer A Willis
C: Berry Gray, Planner
Tom Hepler, PE
Chandra C. Coats, PE
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