20080716 Ver 1_Stormwater Info_20080814

• consultants
O LAND DEVELOPMENT CONSULTANTS
To: DENR
NC Div. of Water Quality
2321 Crabtree Blvd; Ste 250
Raleigh, NC 27604
WE ARE SENDING YOU THE FOLLOWING ITEMS VIA
X-wx
Date: 8/14/08 Job No: 14501
Attn: Annette Lucas
Re: Richland Creek Community Church
DWQ # 08 j,t J() r? ?Q
hand deliverv by WCM
Copies Date No. Description
1 8/5/08 Wake Co. Conditional Approval on Stormwater
Mnan ement Plan
1 7/11/08 Stormwater Management & Drainage Analysis
1 7/15/08 Cl Cover Sheet
1 7/15/08 C3 Site Plan
1 7/15/08 C8 Grading & Stormwater Driange Plan
1 7/15/085 D1 Stormwater Pond Details

REMARKS: Wake County Approval and Plans
COPY TO: FILE
AUG = 4 ?008
WETLANDS AND STORMWATER BRANCH
SIGNED: William C. Mills
LETTER OF TRANSMITTAL
LAND PLANNERS + CIVIL ENGINEERS
WAKE
COUNTY
Environmental
Services
Keith Gettle
Civil Consultants
3206 Heritage Trade Drive
Suite 100
Wake Forest, NC 27567
RE: Letter of Conditional Approval, 8/5/08
TEL [phone]
FAx [phone]
Water Quality Division
336 Fayetteville Street • Raleigh, NC 27602
www.wakegov.coni
Project Name: Richland Creek Community Church Submitted B : Civil Consultants
Stormwater Permit #: S-2010 3206 Heritage Trade Dr, Suite 100
Date Received: 7/15/08 Wake Forest, NC 27567
Date Processing Initiated: 8/1/08 Phone #: 919- Fax#: 919-
Disturbed Acres: 7.59 Submittal E] Revision
Plan Review Fee: $ 1973 (Received) 1. Maintenance Manual and Budget: Prior to CO
Plan Permit Fee: $ 1973 (Pending) 2. Maintenance Covenant: Prior to CO
Nitrogen Offset Fee n/a 3. As-built Plans and Certification:(Re uird Prior to C.O.)
Watershed: Neuse River Basin, 03020201 4. Annual Inspections Report: required annual)
Dear Mr. Gettle:
The above-referenced stormwater management plan has been reviewed and conditionally approved. As a
condition of approval you are required to provide items I through 4 as noted above. The Maintenance manual
and budget, Maintenance Covenant, As-built certification and Inspection report must be approved by Wake
County prior to final signoff of the Certificate of Occupancy (C.O.) for your building permit. It is very
important that your contractor, engineer and yourself be aware of these additional provisions to insure that the
outstanding stormwater management requirements are submitted, reviewed, approved and installed, such that
these conditions are satisfied. See below, for Ordinance specific wording on requirements.
Meet requirements of flood study S-2011.
I. Maintenance Plan The developer must record, and reference on the record plat, a maintenance
plan that instructs the property owner about the annual maintenance tasks and associated costs for
at least a 20-year period. It will be the responsibility of the property owner to update the
maintenance plan at least every 10 years.
2. Maintenance Agreement The developer must record, and reference on the record plat, a
maintenance agreement, or restrictive covenant that sets forth the property owner's continuing
responsibilities for maintenance.
Maintenance Easments The developer must record easements for access, maintenance and
inspections by Wake County Government.
4. As Built Plans Upon completion of required improvements, the developer or the developer's
representative must submit as-built plans of required stormwater improvements to the Wake
County Department of Environmental Services. These plans must indicate whether stormwater
improvements were constructed in accordance with the County approved stormwater
plan.findings.

Finally, there is a Stormwater Permit Fee of $1973 to be paid to Wake County. Please submit this
payment in a check made out to Wake County at the Environmental Services Waverly F. Akins Wake
county Office Building located on the 1 S` floor of the building off of the Fayetteville Mall entrance prior
to the release of your Land Disturbing Permit. Your memo should reference your Stormwater Permit #.
This request for Wake County to evaluate a stormwater management plan does not relieve the applicant
from their responsibility to meet all applicable State and Federal Laws, including, but not limited to
necessary approvals from Federal Emergency Management Area Flood regulations/requirements,
Division of Water Quality stormwater or other water quality regulations/requirements, U.S. Army Corps
of Engineers Article 404/401 (Wetlands/Streams) jurisdiction/requirements, and/or any Federal, State,
County and Local municipal regulations or permit requirements. The approval issued in this letter cannot
supersede any other required permit or approval.
Thank you for your patience during the review period on this project. If you have any questions about
this approval please call me at [phone].
Sincerely,

Betsy Pearce, CFM
Environmental Engineer / Consultant
cc: Shelita Atkinson, Planner
Jennifer Sjaardema, Sediment & Erosion Control

• 0 dvil consultants
O LAND DEVELOPMENT CONSULTANTS
STORMWATER MANAGEMENT
AND DRAINAGE ANALYSES
FOR
Richland Creek Community Church
Wake Forest, NC
April 1, 2008;
Revised July 11, 2008
Project #14501
Prepared For:
RICHLAND CREEK COMMUNITY CHURCH
3229 BURLINGTON MILLS ROAD
WAKE FOREST, NC 27587
104.
w
SEAL
s tow _ 1111 ? M) C7 = 4 ' 008
+? r Mt AN
yd?T +aDb AN., ST6RM\NATER BRANCii
LAND PLANNERS + CIVIL ENGINEERS
3206 HERITAGE TRADE DR, SUITE 100, WAKE FOREST, NC 27567, 919.453.2386 PHONE [phone] FAX
WWW.CIVIL-CONSULTANTS.COM

ar CA
STORMWATER MANAGEMENT ANALYSIS SEAL
s ,0437
Project Name: Richland Creek Community Church ss i
Project Number: 14501 p
Report Date: April 1, 2008; revised July 11, 2008
Project Location: Intersection of Burlington Mills Road and Ligon Mill Road, Wake
Forest, NC
Purpose: Review methods used to meet Wake County's Ordinance
regarding stormwater management and treatment.
Site Description:
The proposed development site is approximately 30.9 acres site located in Wake
County, NC, near the Town of Wake Forest, in the northeastern quadrant of the
intersection of Burlington Mills Road and Ligon Mill Road. Access to the site is by
existing driveway from Burlington Mills Road, which runs along the south side of the
site. The site presently is developed as a church with associated parking lot. A large
portion of the site acreage is undeveloped land. The existing buildings and parking
areas on the site discharge stormwater to two unnamed tributaries of Smith Creek (a
class "C NSW" stream). These tributaries begin on the site and flow in a northerly
direction, eventually becoming tributary to Smith Creek approximately 3/4 mile
downstream of the site and empty at two separate locations at the creek.
Proposed Development:
The proposed development consists of the construction of additional parking area for
the church. The expansion is a small parking addition (approx. 0.69 acre of new
impervious surface) to the existing parking lot in front of the church and adjoins
Burlington Mills Road. The area for the parking lot addition is undeveloped land which
drains in two directions (a portion of this area drains into the surface of the existing
parking lot which has a stormwater collection system; the other portion of this area
drains overland to eventually flow to the tributary on the west side of the church site).
The other parking lot (approx. 2.85 acres of new impervious) is on a large portion of the
site that is on the opposite side of the stream from the church. This area is
undeveloped and parts of it were previously used as soil borrow areas, and drains into
the tributary which is on the east side of the church.
IV-
-q 11110f
The larger lot will flow stormwater runoff from impervious areas to a new wet detention
pond to be constructed. Routing of the stormwater runoff to the proposed pond will
produce a peak discharge that is no more than the pre-development peak discharge
xI
rate for the 1-year, 24-hour storm event. The runoff from the first inch of rainfall runoff
will be captured in the water quality volume of the pond (which has a five foot deep
permanent pool) and released over a 2 to 5 day period. The 100 year event will
discharge over an emergency spillway but the 10 year event will be detained in the
pond and discharge through the riser.
The smaller parking lot addition along Burlington Mills Road cannot discharge to the
proposed wet pond. However, there is an equivalent area of existing impervious along
the rear of the facility which can be re-directed from its existing discharge directly to the
stream so as to discharge and be routed to the new wet pond. It is proposed to capture
this existing impervious area in compensation for treating the runoff from the proposed
smaller lot. The small parking lot addition will discharge the stormwater after
development to the existing storm collection system of the existing parking lot adjacent
to it.
Analysis:
Analysis for the site was performed using Hydraflow Hydrographs based on the current
preliminary site plan with proposed storm layout. In accordance with the County of
Wake's stormwater ordinance to implement the Neuse River nutrient sensitive
requirements, new impervious surfaces must have the runoff from the first one inch of
rainfall treated to 85% total suspended solids removal and the stormwater discharge
must not be increased by the development for the 1 year, 24 hour storm event.
The proposed wet pond will be designed to treat the impervious area of the new parking
lot and an area of the existing impervious area behind the church.
Neuse River Riparian Buffers will be maintained in those areas which have been
delineated. (See attached report by S&EC on buffers.) Discharge from the proposed
wet pond will be released slowly just outside of the NRRB by level spreading of the
pond discharge.
Treatment Best Management Practices (BMPs):
A wet detention pond is proposed to be constructed to treat stormwater for quality and
quantity. Design is in keeping with the BMP Manual produced by DENR. The pond will
have a permanent pool of water with a foot of sediment storage provided. Above the
permanent pool will be the temporary or water quality pool of storage that will
accommodate the runoff from 1 inch of rainfall. This water quality pool is designed to
release slowly through a drawdown orifice over a 2 day to 5 day period. There will be
an aquatic shelf just below the permanent pool level. Above the water quality pool
additional storage of rainfall runoff is provided to achieve peak flow attenuation and
discharge through a riser (4 ft diameter). Flows that exceed the riser can be safely
t
discharged through an emergency spillway in the dam. The calculations are attached
that size the riser, the orifice, the pond volume, the emergency spillway, etc. The
drawdown orifice and the riser will be protected with a screen and a trash rack,
respectively. The drawdown orifice will also be tilted downward on the pond side so the
discharge into the orifice is from below the water surface which helps to prevent
clogging by floatables. The emergency spillway is designed as a broad-crested weir. A
weir coefficient of 2.6 was selected and a width of 24 feet. At the 100 year event the
water level over the weir will be 0.32 feet or 3.8 inches. A freeboard of more than 1 foot
will be maintained to the top of dike during the accommodation of the 100 year event.
Results:
New impervious areas are expected to be approximately 3.54 acres. The proposed wet
pond will provide control for the 1 year storm event and treat the stormwater for water
quality.
The modeling of the runoff by the Hydraflow Hydrographs software used the SCS
methodology in establishing hydrographs for the pre and post runoff and routing of the
post development runoff through the wet pond.
Storm Event 1 yr, 24 hr 2 y, 24 hr 10 yr, 24 hr 100 yr,
24hr
Pre development Peak 7.07 10.56 22.32 41.53
flow cfs)
Post development Peak 17.02 21.47 34.94 55.08
flow (cfs)
After detention peak flow 0.09 0.22 6.78 46.77
(cfs)
Objectives for water quality are 85% removal of Total Suspended Solids and reduction
in nitrogen export to conform to the Neuse rules. (Nitrogen export calculations are in
the attachments.)
Conclusion:
Based on the calculations and stormwater modeling efforts, the proposed design
provides sufficient detention and treatment to conform to the County of Wake's
requirements for stormwater control.
Storm Drainage Systems:
New private pipe conveyances and culverts for the parking lots have been sized using
the Rational Method. On-site runoff is directed to a permanent detention pond. All on-
site drainage pipe sizing is shown in the storm drainage data tables. All on-site
drainage areas are small therefore the minimum time of concentration of 5 minutes
was used. The composite runoff coefficient values were determined for each drainage
area and included with the pipe calculations.
Appendix:
USGS Quad map
CN Calculations
Wake County Soils Map
Water Quality Calculations
Nitrogen Export Calculations
Tc calculations and assumptions
Environmental Services Stormwater Report
Draft Stormwater Agreement and Draft Stormwater Maintenance Manual
Neuse River Riparian Buffer report by S&EC
Detention Analysis
Stormwater Management Area Map - SD2

USGS
V, \
i
1 JI ?
_ P
?, r?
e.
n \
In / _ •
Ii
? O

i

ta

•o

S!.
[Y
0))M%_(,--// Ml .Y/ - _ar?vJ?\ _rr_rl__-
v
'81
/
i \
r
"80
n "79
2 a ?: h
O "78
0 1
h? Q °97
300
o O 0 .•
50!
jsO ° - 1
;II
O C) . II
'76

' n
?\ 11
"75
WAKE FOREST QUADRANGLE
o ` NORTH CAROLINA-WAKE CO.
7.5-MINUTE SERIES (TOPOGRAPHIC)
CN Calculations
Wake County Soils Map
0

vc
r
Z
Q
O
z
3
r
N
zON Cv tn?-1(?vv? v g!-1mvvvOD
MOZK rr D?n0-ZZD m rrmmmmv
bozo mz a co rzvmmmmv
mvZ WG ov z I z n Zv6?vvvvM
mDOn zvD?mm -1 D O«D V v
2m.. N ?Mm mv ?m o ?rrmmm0
m y
N x o 0 ?
M
co o 7 c
m i3
s
3
w
rOo
0-0 0 - rn rn wi
0-4
°A? °mmC?t?m0°VO°Nmoo
m in ?wxC2KW? ?m U
0 3:
m to m:?0 1 w
1
N M
N m
m
;rl

N ?N? X

M,

r=C _

a

CD
CD
X:

tG ?

C
1
v o ? m_m I €{m
z
m m
z

3
Q
3
m ?
A
tD
V
+D O SOr)
v o °m
?mmCKx
o-n X oc Nm
0
xz0
Ef
t
u, ?
-yi
m
z m
n x
c :Fl®-
b j, • O b b
b
0 be
e C b O m S
O
b •
.Z b
e a 0 b
?
e b Q
W
N
O
O
00
N
tJ
W
D
0
m m
Tm
on
op
ao ?
nw
0 0
xOP
(D N
O)
tG W
? N
N ?
CD
n
°c

vwmv Cl ?1-I?-41
z b g z
TmKmC-)
n• m n
X X
a
Water Quality Calculations
CIVIL CONSULTANTS, INC. JOB ::RirA laj Crre'v' N
. •
3708 Lyckan Parkway Suite 201 SHEET NO. _ OF 2-
DURHAM, NC 27707 CALCULATED BY ?'???V?- DATE-kg/1 ?
[phone]
Fax [phone] CHECKED BY DATE
Nitrogen Export Calculations
m
0
J
G
(1)
0)
LO
Z
tl.
Co
T
N
0
a
L
U) U)
vorn
r- Orn
m 40
OD M
as
?Co
m
?Q
.o a
m
m m
N ?
E
a" N
o
m
>m co
?mm
z O o
E Z Z
O M
c
C:
J m m
c E E
a> E E
2 -E m
Z L n
` C
U

a
o?
o?
O O ?
O a)
N
Q
a

M
Lb
CD On
ate=
! ?
-

ya-'-0 .c_

m cri

A m N

? CO Co
:S Q
..
?
to to
CV M a J(D
c ca 0
m m as

co Q. -rz co
ca
E mE
L
+
' C CO I 0 cri
co U
O ?, a7 m ?II
C CO U

4)
Z
Jz
ID m m
0 D
c E
,
Q w V N
;z
aaa
OR
c c c
a) () a)
a? a? m
? c c
C
lUOQ -20t, Z,
U')
OM?Q>N
Om V- CO
C
N E
O
>
(D
aa)
a ?
g E
to m > 02
aEc>iE
c -- N , O
O 0 O m
N > Z C
rnomm
2 :'S m U m
m z w Q cc
Y
O
L L L L L
mca
, mm" -T m
?
OMWU) (a w
m.n.0 .aaa
o3irnomc°0oIt
OOofM O
V- It- Q>
N
E14

m
r_
0
c
G.
X
a)

v
m

o +,
?
a?
E

Q m
O

m
R c rn
Co r- L- LU
--
O m
Q J ±+ N
L cu E 4tangy
? QI -
c.Z ? z i?of 0
U
N
o?
N
V-
m
a
m
.Q
V
m
O
C
m
Cl)
O
Z
V

co vaoIt
It N v tr!
NcliOV)
O O Co
aw
x m
W =
CflNNt'7
O T N
N
O `
V ?+
? w
to
xm
w =r
V N LO CO
O M to
W
? i
w
V
0
a ^
O U
w
E
c O
O ?-
C N
?a
_ c
N
0 uNi
U -
# > 0
W O N
V
00. r
C 0 aQ
W
O
,Z 0 .?+ tm
N C O H
CL 0 ?(u EO
aH
.Q
w
b
G
O
L
.a
cm
OR
N
O
O
w
as
3
0
O
LO
V
U
C
N
U
N
O
N
a
m
0000
r C
Q a
. W
x
co NNt"!
O V-: e- N
N

O ^

A > V a
,
U U
0 A
L
U) 0) (a x r
w
O O O O
M
CR (P
V- LO I
r M
ttl
c i
w
Q ?
3
0
a ^
U
m
.
+
E N
C tT
O Q
E
c to
?a
_ c
N
O vN1

C) to
O m m

p U
C-i
?
C U
Q 4k
y
>
_
? V Q
to (C
Q
0
Q°o .
Qa0QQ

W
x O p UJ N
J
w U Q
+.
N o Q r. L O 0
z O
Q
JE-? N
?
o

z < z c
0
aP:) P
C
O
C
0
0
O
O
O
0
C
(D
N
O
N
a
m
L
Qs:2
_O O_ O_
0 ? 0
as
m m m
Q Q
?aa
v N
o
c c
O
11 w V
ca :3 w
J E O
Z Q Z
CD t0
m CO
ti
_O _O
? t]
C%j
N
m
L
cts
+
0
? C
0) m a
+ m N
to o O
? >
O J 0 E
0
toO1->
N = c
co
g' Q Z m ?
? co o E
o o0 Ae
ca - - ZU
c
O
m
75
_U
CL
2
m
moo
a
°) SOU 0 cp 04 0M vaor,_TM
Cl Q t[i cri o0 I? N p e! t. ?rj N
m
c?a
OF-
U)
? m
O
2 = O
m 0
E a 0.
CD E
c
w Z H
U
w m
c N
O 0
0.m
O V
CD 10 a
M 4)
a
m c m
CEO
Z z H
to
O
O y
CL .0 Z o ?
0
E0z3
?E
a=w 3
')C ro
d W c
O m O cc
0'a O
0- 0-
0 U N UOU lII
N N N m
a Q c Q
N V) N y
n. c c- c
O m O m "@ CL
4) 0 0
M Cc
M N
E C E C

'a
m
CL
0
>Mf-0%-
L6aMo
m
c
d
a
0
'm
o?
mr 20
N is 1jo?
r
?:r
m
x
m
Co 3
CO
U
o N m
T
U N
T
N
m
0 Q Q
O O y
"0
c O
m m Z
0 3 E
0 0 0
c m m m
Q O o O
z z z z
L L L L L
mmc?omc?a?
v y y y y y
A
Ntl- 0001-- co
CY! 000toMLO
r6C)66 iC
N
69,
m
m
c
O
N
C
Q
0
N
y
'O
m
o a

l0 ? m
m
a)
C }?
°
in m
c (D
E

m 5 F CF.cd
woirs o6E0

z s C
aiiwo
ma??
l L6?°
ri C!
M w LO O
T
a
m
d
m
.C
3
CO R
} E
a?0mc?o
0
N 0' Cl: Z
tAC4J cia
W 3
O U 0 c
NF- QJ Q
0
c
O
m
3
U
fu
U
c
N
0
O
L
z
:te
a
TC Calculations and Assumptions

CIVIL CONSULTANTS, INC.
3708 Lyckan Parkway Suite 201
DURHAM, NC 27707
[phone]
Fax [phone]
JOB 1A kj lJ(Ge
SHEET NO. p OF
CALCULATED BY DATE
CHECKED BY DATE
SCALE T S.
' TR55 Tc Worksheet
Hydraflow Hydrographs by intermotm
Hyd. No. 1
New parking and fields pre development
Description A B C Totals
SM& Flow
Mann
ing's n-value = 0.240 0.011 0.011
_
Flow length (ft) = 100.0 0.0 0.0
Two-year-24-hr precip. (in) = 3:50 0-00 0.00
Land slope (%) = 3.00 0.00 0.00
Travel Time (min) = 11.60 + 0.00 + 0.00 = 11.60
Shallow Concentrated Flow
Flow length (ft) = 150.00 0.00 0.00
Watercourse slope (%o) = 3.00 0.00 0.00
Surface description = Unpaved Paved Paved
Average velocity (ft1s) = 2.79 0.00 0.00
Travel Time (min) = 0.89 + 0.00 + 0.00 = 0.89
Channel Flow
X sectional flow area (sqft) = 1.50 0.00 0.00
Wetted perimeter (ft) = 1.00 0.00 0.00
Channel slope (%) = 3.00 0.00 0.00
Manning's n-value = 0.050 0.015 0.015
Velocity (ft/s) = 6.77 0.00 0.00
Flowlength (ft) = 250.0 0.0 0.0
Travel Time (min) = 0.62 + 0.00 + 0.00 = 0.62
Total Travel Time, Tc ....• ....... .................. ........................ .................. 13.10 min
TR55 Tc Worksheet
Hydrafim Hydrographs by Intelisolve
Hyd. No. 3
fields post development
Description A B C Totals
Sheet=F=low=
Manning's n-value = 0.240 0.011 0.011
Flow length (ft) = 50.0 0.0 0.0
Two-year 24-hr precip. (in) = 3:50 0.00 0.00
Land slope (%) = 1.00 0.00 0.00
Travel Time (min) = 10.34 + 0.00 + 0.00 = 10.34
Shallow Concentrated Flow
Flow length (ft) = 250.00 0.00 0.00
Watercourse slope (%) = 2.00 0.00 0.00
Surface description = Unpaved Paved Paved
Average velocity (ft1s) = 2.28 0.00 0.00
Travel rime (min) = 1.83 + 0.00 + 0.00 = 1.83
Channel Flow
X sectional flow area (sgft) = 0.00 0.00 0.00
Wetted perimeter (ft) = 1.00 0.00 0.00
Channel slope (%) = 1.00 0.00 0.00
Manning's n-value = 0.050 0.015 0.015
Velocity (ft1s) = 0.00 0.00 0.00
Flow teng-th (ft) = 3x0:0 0.0 0.0
Travel rime (min) = 0.00 + 0.00 + 0.00 = 0.00
Total Travel Time, Tc ..................................... ........................... ....... 12.20
min
Environmental Services Stormwater Report
ENVIRONMENTAL SERVICES STORMWATER REPORT
1 _ Permit Tnfnrmatinn
Project Name ?A ? rt K• C
Project Number - Q' 0
Watershed (Meuse / Cape Fear)
PIN Number
e ?/Nr
Disturbed Acres ,'.?
Preliminary Submittal Date ?,??
Development Type (R, C, I) / ??uNC?
C
Project Type (new or expansion)
2. Contact Tnfnrmatinn
Submitted By L
U ' C°
l{
i
art5u
zt ?.
Street Address r,?
r.
City / State / Zip
G S
Phone #
ids 3-
Fax # /9-"03-033(0
Email Address
t.?'?t . Gt llJi ? dXSK
3. Nitrogen & Peak Flnw Tnfnrmatinn
Project Area (ac)
Existing Impervious (ac) 5.
New Impervious (ac)
'
% Impervious o
Pre-development nitrogen (Ibs/ac/yr)
Post-development nitrogen (lbs/ac/yr)
Post BMP nitrogen (Ibs/ac/yr) ,?
Offset nitrogen (Ibs/ac/yr) .
Offset fee due A /? 00
Pre-development peak flow (cfs) f?
Post-development peak flow (cfs) ?, .O 2
Post BMP peak flow (cfs) ?,.
4. Stormwater Dnrnmente
Type of BMP (s) ?s
Purpose of BMPs (nitrogen / attenuation)
Maintenance Manual and Budget: SS biro e?t
Maintenance Covenant:
As-built Plans and Certification:
Annual Inspections Report:
3_ Fees
Plan Review Fee: (Received)
Plan Permit Fee: (Pending)
Nitrogen Offset Fee due to NCEEP (Received)
r AJU
COUNTY
tiC)R-1II CAROLINA
l 7V9.0 3 -Ia? 3333
I ? q?-1 ji - let?
? NO/40 -15,07
d e /00
??s • C ari?•
'000 A?"'then
I, the undersigned, certify to the best of my knowledge that the above inform ion is correct (affix seal).
?GG???r?? 7?11?a8
Draft Stormwater Agreement and Draft Stormwater Maintenance Manual
STATE OF NORTH CAROLINA
WAKE COUNTY
STORMWATER AGREEMENT
THIS. AGREEMENT, made and entered into this the day of , by and
between Wake County, hereinafter referred to as County, and , hereinafter
referred to as Owner;
WITNESSETH
THAT WHEREAS, Owner is this day accepting responsibility for the stormwater device(s) installed
on that certain real property known as , as shown on the plat thereof
recorded in the Book of Maps , Page , Wake County Registry; and
WHEREAS, as a part of the construction of the residence/development the Wake County
Environmental Services - Flood and Stormwater Section required that a stormwater device(s) be constructed;
and
WHEREAS, the Owner accepts responsibility for the maintenance of the stormwater device(s) as
prescribed in the Maintenance Agreement signed and notarized, dated , 2006; and
WHEREAS, the Owner grants access to Wake County to inspect the stormwater device(s); and
WHEREAS, the Owner understands that this Agreement shall endure to the benefit of his successors
in title, whomsoever they may be in the future.
NOW, THEREFORE, it is understood and agreed by and between the parties:
1. The maintenance of the stormwater device(s) shall be the sole responsibility of the Owner.
2. The responsibility for the maintenance of the stormwater device shall pass in the chain of title to the
Owner's successor in interest.
3. Access is granted to Wake County to inspect the stormwater device(s).
4. Annually, The Owner shall provide an inspection report from a licensed professional to occur each
year beginning on and on the day of each successive
thereafter. This report should be faxed to [phone], Attention: Environmental Services -
Flood and Storm Water Section.
Owner:
Owner
Date:
E
f
NORTH CAROLINA
WAKE COUNTY
I, THE UNDERSIGNED notary Public of the County and
State aforesaid, certify that personally appeared before me this day and
acknowledged the due execution of the foregoing instrument.
WITNESS my hand and notarial seal, this the day of
Notary Public
My Comm. Exp.
PROJECT:
RESPONSIBLE PARTY:
ADDRESS:
STORMWATER CONTROL STRUCTURE
WET DETENTION BASIN MAINTENANCE AGREEMENT
PHONE #:
Monthly or after every runoff producing rainfall, whichever comes first:
a. Remove debris from trash rack.
b. Check and clear orifice of any obstructions.
c. Check pond side slopes; remove trash, repair eroded areas before next rainfall.
Quarterly
a. Inspect the collection system (i.e., catch basin, piping, grassed swales) for proper functioning.
Clear accumulated trash from basin grates, and basin bottoms, and check piping for obstructions.
b. Check pond inlet pipes for undercutting. Repair if necessary.
c. Repair any broken pipes.
d. Replace rip rap that is choked with sediment.
III. Semi-Annually
a. Remove accumulated sediment from bottom of outlet structure.
b. Check pond depth at various locations. If depth is reduced to 75% of original design depth, remove
sediment to original design depth.
c. Reseed grassed swales twice yearly. Repair eroded areas immediately.
IV. General
a. A natural buffer is encouraged along the banks of the pond where appropriate. Annual mowing can
be used to maintain a low buffer. Vegetation along the dam should be mowed on a regular basis to
discourage root intrusion.
b. Wetland plants are encouraged along pond perimeter, however, invasive species such as cattails
shall be removed.
c. All components of impoundment system to be kept in good working order.
d. In case the ownership of the Impoundment Transfers, the current owner shall, within thirty (30) days
of transfer of ownership, notify the Wake County Environmental Services, Flood and Stormwater
Section of such ownership transfer.
e. This property and impoundment is also subject to the Operation and Maintenance Manual filed for
this project.
I, , hereby acknowledge that I am the financially responsible party for
maintenance of this impoundment. I will perform the maintenance as outlined above, as part of the Certificate
of Compliance with Stormwater Regulations received for this project.
Signature:
I,
do hereby certify that
, 200
hand and official seal,
Date:
a Notary Public for the State of
County of
personally appeared before me this day of
and acknowledge due execution of the foregoing instrument. Witness my
Seal My commission expires:
Stormwater Wet Detention Basin Maintenance Manual
Richland Creek Community Church, Wake Forest, NC
Recordkeeping: A maintenance record will be kept on this BMP. This maintenance
record will be kept in a log at the church office. Any deficient BMP elements noted in
the inspections 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.
The wet detention basin system is defined as the wet detention basin,
pretreatment including forebays and the level spreader.
Maintenance procedures:
- Immediately after the wet detention basin is established, the plants on the
aquatic shelf and perimeter of the basin should be watered twice weekly if
needed, until the plants become established (commonly six weeks).
- No portion of the wet detention pond should be fertilized after the first initial
fertilization that is required to establish the plants on the aquatic shelf.
- Stable groundcover should be maintained in the drainage area to reduce the
sediment load to the wet detention basin.
- If the basin must be drained for an emergency or to perform maintenance, the
flushing of sediment through the emergency drain should be minimized to the
maximum extent practical.
- Once a year, a qualified professional should inspect the embankment.
After the wet detention pond is established, it should be inspected once a month.
Records of operation and maintenance should be kept in the church office and must be
available upon request.
Inspection activities shall be performed as follows: Any problems that are found shall
be repaired immediately.
BMP element: Potential problem: How to remediate the problem:
The entire BMP Trash/debris is resent. Remove the trash/debris.
The perimeter of the wet Areas of bare soil and/or Regrade the soil if necessary to
detention basin 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.
Vegetation is too short or too Maintain vegetation at a height of
lon approximately six inches.
Page 1 of 4
BMP element: Potential problem: How to remediate the problem:
The inlet device: pipe or The pipe is clogged. Unclog the pipe. Dispose of the
swale sediment off-site.
The pipe is cracked or Replace the pipe.
otherwise damaged.
Erosion is occurring in the Regrade the swale if necessary to
swale. smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
The forebay Sediment has accumulated to Search for the source of the
a depth greater than the sediment and remedy the problem if
original design depth for possible. Remove the sediment and
sediment storage. dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Erosion has occurred. Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
Weeds are present. Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than s ra in g.
The aquatic shelf Best professional practices Prune according to best professional
show that pruning is needed practices
to maintain optimal plant
health.
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 to establish the
ground cover if a soil test indicates
it is necessaly.
Weeds are present. Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying.
The main treatment area Sediment has accumulated to Search for the source of the
a depth greater than the sediment and remedy the problem if
original design sediment possible. Remove the sediment and
storage depth. dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Algal growth covers over Consult a professional to remove
50% of the area. and control the algal growth.
Cattails, phragmites or other Remove the plants by wiping them
invasive plants cover 50% of with pesticide (do not spray).
the basin surface.
Page 2 of 4

BMP element: Potential problem: How to remediate the problem:
The embankment Shrubs have started to grow Remove shrubs immediately.
on the embankment.
Evidence of muskrat or Use traps to remove muskrats and
beaver activity is present. consult a professional to remove
beavers.
A tree has started to grow on Consult a dam safety specialist to
the embankment. remove the tree.
An annual inspection by an Make all needed repairs.
appropriate professional
shows that the embankment
needs repair.
The outlet device Clogging has occurred. Clean out the outlet device. Dispose
of the sediment off-site.
The outlet device is damaged Re air or re lace the outlet device.
The receiving water Erosion or other signs of Contact the design engineer.
damage have occurred at the
outlet.
Sediment removal:
The measuring device used to determine the sediment elevation shall be such
that it will give an accurate depth reading and not readily penetrate into
accumulated sediments.
When the permanent pool depth reads
sediment shall be removed.
feet in the main pond, the
When the permanent pool depth reads
shall be removed.
feet in the forebay, the sediment
Page 3 of 4

I am responsible for the performance of the maintenance procedures listed above. I agree
to notify Wake County Environmental Service of any problems with the system or prior
to any changes to the system or responsible party.
Project name: Richland Creek Community Church
Print name:
Title:
Address:
Phone:
Signature:_
Date:
Page 4 of 4

Neuse River Riparian Buffer Report by S&EC
•
f
Soil & Envirorine;ritai
11010 Raven Ridge Road • Raleigh, Consultant
s,
Carolina 27614 Phone: [phone]
www.SandEC.com Fax: [phone],67
February 13, 2007
- S&EC Project # 10552.W3
Bass, Nixon & Kennedy; Inc.
Attu .: Narry Ivlitchell "
10405 E Ligon Road
Wake_Forest;=?1C 27587
Re Division of Wafer Quality (DWG Venficahon Meeting
as _
of the Ne
k°O? Richland Creek Community Church euse Buff
(+/_g `acres , W r Rules for the property
*e County, North Carolina
Dear.Mr. Mitchell:
01 1. 2, 2007, Ian McMillan (DRi
Buffer Rules on the r" Q) and previewed the features potentiallP P?Y• Mr. McMillan determined that the feature will be bufferedt to the Neuse
property. 'There is a break in the buffer between flags S02 and S03, but the buffers will o
fer t ug - the
buffer will taken from the edge of water in the impounded area. Please re verlap . Th h
e
g the a aPProximate location of the stream on site. Please note that the top to banekaandched
Showing (for the impounded area) should be surveyed throughout the project for accurate loca .
edge of maps water
'
hon.
The Neuse River Buffer rules protect up to
Neuse 0 feet from the edge of existing _
streams, perennial streams, lakes, ponds and estuaries found within g surface waters"
buffer basically consists of two zones. the Neuse,Itiver BasinTh
The first zone is m " -
streams and intended to contain an undistur
the bed-forest e?sured 30 feet landward from the to 0
edge ofthe ed arEa.:. The _ P bank ofn
first zone and is intended to contain a vegetated bu$ er' ?4eeond zone t measured 20 feet from
rules include th
, e.. owance of gzadm couple ofnotable points ofzhe
regmremento£ = g ?thre,vegetatLng-w,?thinZone 2 (the outert20fe ??
mingatron forsoad-crossmgsterf? ??0 foet m-wia
..__ _. ,.....? ?--av..•.w,e. GS=i71:?fTrr?:s•?:.?t=+.Y ?:c4's?:, ._ .. _.,_ _ . -
3,1•nw-.watee 4ounty.Soi1 Survey site vicinity map
Updated Sketch Map
CC: Mr. Ian McMillan (DWQ)
Charlotte Office
236 LePhillip Court, Suite C
Concord, NC 28025
Phone: [phone]
Fes: [phone]
Greensboro Office:
3817-E Lawndale Drive
Greensboro, NC 27455
Phone: [phone]
t '
s
r-

i ; 8011 A Emlrenmental Co?ultartte PA
11010 Rm ert Ridge Ro
d
I
e
, A
le h Nortlt Gro&ul 27614
Phone: [phone].. goo ^-
Feet: [phone]
P<e soh 7 WPn la drrAPluningrdmetlort
S --\i
\
" nronr the r$hl to modify IMr map buM on me" geld+roHa,
"er
APDnorIm rr-Yad Mtineetlen and any ether eddillenal Infor
u

e

`
morlon.
lhera wu ePPed wing lepegraphie mMr and ground Irulhing.
Permitted by the U
n'VH -PProod end
s•Ar

\
,
rn
Y Corps 01><nalntn. D

B
t

C7
g d ?
Linear Wetland
Intermittent Str

V2
66 TTCH
SO?tB!t-
O
CH,--/lil
\34,40 (Et
'S04
tT\3
1
z9L 9A&13 TT S03.

Wetland
04 TT PL
X12_ TT PL
)1 TTPL
03 CL 2' D
? D
This area Is considered buffered, Instead of
being a linear wetland. i

rrJ
DRAT
Perennial Strec
00pen Water
>- ue ><p from
e of Water
S02
3TTCH-1a 1TT. c_
G- ?

Project No.
Scale:
1 =150'
Project Mgr.: -------
Jason Payne Dec. $e 2006
Wetland Sketch Map
Richland Cr. Comm. Church
BNK
Wake County, NC
Prepared by; Steven Ball
1\ \N?,,
W +E
S
Soil & Environmental Consultants, PA
11010 Raven Ridge Rd.- Raleigh, NC 27614
[phone] -[phone]
Web Page: WWW.SandEC.com