20061651 Ver 2_401 Application_20070307

•
Soil & Environmental Consultants, PA
11010 Raven Ridge Road Raleigh, North Carolina 27614 Phone: [phone] Fax: [phone]
www.SandEC.com
March 6, 2007
S&EC Project #9654.W2
DWQ Project #06-1651 v ~
Department of Environment and Natural Resources
Division of Water Quality
Attn: Cyndi Karoly
2321 Crabtree Boulevard, Suite 250
Raleigh, NC 27604
Re: Reply to the Division of Water Quality's Request for More Information
West Chatham Townhomes
Cary, Wake County, NC
Dear Mrs. Karoly:
On January 29, 2007, S8~EC received a Withdrawal of Application letter pertaining to the
subject project requesting additional information in order to continue processing the permit
application. Specifically, your office noted deficiencies in our application package; your original
questions/requests as they appear within letter are listed below and are then followed by our
response. Additionally, because the original application was returned with the Return of
Application Package letter dated February 9, 2007, 5 copies of the application are attached for
your file.
Additional Information Requested:
1. You may not design the extended detention wetland with two forebays.
The constructed wetland has been revised to include only 1 forebay. This is shown on
the revised constructed wetland detail sheet C3.3 (see attached).
2. All flow needs to be directed to the forebay at the north end of the wetland. .
The storm drainage has been revised and now directs all flow to the north forebay. This
is shown on the revised constructed wetland detail sheet C3.3 (see attached).
3. The surface areas at certain depths remain out of compliance with our guidelines of 15% in
forebay, 35% in high marsh, 35% in low marsh and 15% in micropool.
As a result of removing the second forebay, the engineer was able to revise the various
depths to comply with DWQ guidelines. This is shown on the revised constructed
wetland detail sheet C3.3 and the 401 extended detention wetland worksheet (see
attached).
4. The planting plan does not include a large enough variety of wetland plants. The source for
the plants and the soils is not specified.
Charlotte Office:
236 LePhillip Court, Suite C
Concord, NC 28025
Phone: [phone]
Fax: [phone]
I~, (' ~~ i'' ("v ~
~ t',E Ali . s tom, j ~k G,;:~:,, ~ ~,"L
Greensboro Office:
3817-E Law dale Drive
Greensboro,~C 27455
Phone: [phone]
Fax: [phone]

The planting plan has not been revised to include 3 tree species, 3 herbaceous species
and 2 shrub species. The source for the plants and soils are included on the revised
constructed wetland detail sheet C3.3 and the 401 extended detention wetland
worksheet (see attached).
We anticipate that this answers all of the DWQ's questions in order to complete the review and
approval process fora 401 Water Quality Certification and Riparian Buffer Authorization. If you
have any further questions or any additional explanation is needed, please don't hesitate to call.
Sincerely,

Debbie Edwards
Environmental Specialist
CC:
Matthew Danielson-Beazer Homes, 5811 Glenwood Ave, Suite 200, Raleigh, NC 27612
Travis Crissman-BNK, 6310 Chapel Hill Road, Suite250, Raleigh, NC 27607
Attachments:
1) 401 Extended Detention Worksheet
2) Water Quality Retention Calculations
3) Constructed Wetlands Detail sheet C3.3
4) Original application package
2

DWQ Project No. ~ G - j ~ ~ ~ Y Z
DIVISION OF WATER QUALITY - 401 EXTENDED DETENTION (and POCKET*) WETLAND WORKSHEET
I. PROJECT INFORMATION~PPlea a complete the following information):
Project Name : S'1 (~1'-~G-n~ ~owv~ home S
Contact Person: vi ~ v» Phone Number:
For projects with multiple basins, specify which basin this worksheet applies to:
Permanent Pool Elevation
Temporary Pool Elevation
Permanent Pool Surface Area
Drainage Area
Impervious Area
Forebay Surface Area
Marsh 0"-9" Surface Area
Marsh 9"-18" Surface Area
Micro Pool Surface Area
Temporary Pool Volume
SA/DA used
Diameter of Orifice
II. REQUIRED ITEMS CHECKLIST
u} ~-~-D . 00 ft.
~!4 f • 1'~ ft.
~ ~ (o ~ ~ sq. ft.
q • 43 ac.
1l0 08 sq. ft.
'FOB 2 sq. ft.
sq. ft.
1!052 sq. ft.
1 ~ $4~ cu. ft.
(elevation of the orifice invert out)
(elevation of the outlet structure invert in)
(water surface area at permanent pool elevation)
(on-site and off-site drainage to the basin)
(on-site and off-site drainage to the basin)
(at permanent pool elevation approximately 15%)*
(at permanent pool elevation approximately 35%)*
(at permanent pool elevation approximately 35%)*
(at permanent pool elevation approximately 15%)*
(volume detained on top of the permanent pool)
l •02 ~~2.6~l0 lMP@3`surface area to drainage area ratio)*
~}.O in. (draw down orifice diameter)
Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a
requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes
a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed
drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for
additional information and will substantially delay final review and approval of the project
licants Initials
The temporary pool controls runoff from the 1 inch rain.
'.l~C The basin side slopes are no steeper than 3:1.
~t, A planting plan for the marsh areas with plant species and densities is provided.
_~[~ Vegetation above the permanent pool elevation is specified.
~~ An emergency drain is provided to drain the basin.
:~L The temporary pool draws down in 2 to 5 days.
7CL Sediment storage is provided in the permanent pool.
1. A sediment disposal area is provided.
Access is provided for maintenance.
~ A site specific, signed and notarized operation and maintenance agreement is provided.
~ The drainage area (including any offsite area) is delineated on a site plan.
~~ Access is provided for maintenance.
;~L Plan details for the wetland are provided.
J(G Plan details for the inlet and outlet are provided.
~L A site specific operation and maintenance agreement, signed and notarized by the responsible party is provided (see
http://h2o.ehnr.state.nc.us/ncwetlands/oandm.doc).
* Pocket Wetlands have different design parameters and are only assumed to remove 35% TSS -See pp. 19 and 20 of the NC DENR
stormwater BMP Manual, April 1999. 10% open water, 50% high marsh, 40% low marsh.

Water Quality Retention Calculations
Project Name: West Chatham Street Townhomes
Determine Surface Area Required for Permanent Pool:
Drainage Area (ac): 9.43
Impervious Area (ac): 4.02
Percent Impervious: 42.6%
Perm. Pool Depth (ft): 3
$A/DA @ 40% 1.73 (from Table 1.1 of NCDENR's Stormwater BMP manual)
$A/DA ~ 50% 2.06 (from Table 1.1 of NCDENR's Stormwater BMP manual)
Interpolated SA/DA: 1.82
Req. Surface Area (sf): 7463 (at permanent pool elevation)
Penn. Pool Elevation: 440.00
Provided Surface Area (sf): 11641.00 OK -Surface area requirement met
Depth @ Surf (ft): 3.00
Calculate the Volume Required to Treat the First Flush:
Rainfall to Treat: 1 inch(es)
Runoff Coefficient (Rv) = 0.05 + 0.009`(% Impervious)
Runoff Coefficient (Rv): 0.43 in/in
Runoff Volume M =Rainfall " (Rv) ' (Drainage Area)
Runoff Volume (V): 14845 CF
Calculate the Derrth Required for the Temoorerv Pool:
Penn. Pool Elevation: 440.00
Provided Surface Area (sf): 11641.00 (at permanent pool elevation)
Provided Storage (cf): 12837.50
Volume Req. for Temp. Pool (CF): 14845
Total Volume Req Temp & Perm(CF): 27682
EI. Of Temp. Pool Between: 441.00
EI. Of Temp. Pool: 441.17
Depth of Temp. Pool (ft): 1.17
Determine the Orifice Size for 2-ti Dav Drawdown:
(this amount required above Perm. Pool)
and 442.00
measured from perm. Pool elevation
Orifice Invert Elevation: 440.00
Elevation of Temp. Pool: 441.17
Orifice Diameter (in): 4.00
Use the orifice equation to determine flow and drawdown time
Orifice Equation: O = C ' A ` (2gh)^0.5
Volume to Draw Down (CF): 14845
Depth of Temp. Pool (ft): 1.00 (measured to CL of orifice)
Increments for Orifice Calculation (ft): 0.100
C: 0.6
g (SF/s): 32.2
A (sf): 0.0873
Top Elevation
(ft) Bottom Elevation
(ft) 'Volume in
this increment Avg. Head
in this
Increment Flow in Orifice
using Or. Eq.
cfs Time for
this Increment
s
441.17 441.07 2516.58 0.95 0.411 6130
441.07 440.97 2516.58 0.85 0.388 6481
440.97 440.67 2516.58 0.75 0.365 6899
440.87 440.77 2516.58 0.65 0.340 7411
440.77 440.67 2516.58 0.55 0.312 8057
440.67 440.57 2516.58 0.45 0.283 8907
440.57 440.47 2516.58 0.35 0.249 10100
440.47 440.37 2516.58 0.25 0.211 11950
440.37 440.27 2516.58 0.15 0.106 23686
440.27 440.17 2516.58 0.05 0.060 41923
440.17 440.07 2516.58 -0.05 0.024 106599
~ v ~ Mw L / b6L.37 Z3i514S
'Assume total temporary pool volume equally divided among all increments
Drawdown Time (Days): 2.76 OK - Drawdown between 2 and 5 days.

Office Use Only: Form version March OS
USACE Action ID No. DWQ No. Flo - t l~ s 1 V 2
(1i any particular item is not applicable to this project, please enter "Not Applicable" or "N/A".)
I. Processing
1. Check all of the approval(s) requested for this project:
® Section 404 Permit ® Riparian or Watershed Buffer Rules
^ Section 10 Permit ^ Isolated Wetland Permit from DWQ
® 401 Water Quality Certification ^ Express 401 Water Quality Certification
2. Nationwide, Regional or General Permit Number(s) Requested: 39
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, complete section VIII,
and check here: ^
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 tails), check here: ^
p~~~~~~ ~`~ M
-~ v.,n.' [~ ,~'~ w.w
II. Applicant Information `~ ~~~
M%,i
~()(.1~
1. Owner/Applicant Information
N
Mailing Address:
100 Falcone Parkway PO Box 1067 702 Oberlin Rd Suite 400
__ Cary NC 27512 Raleigh NC 27605
Telephone Number: 919-467-5151/919-582-3100 Fax Number: 919-460-1013/919-834-4488
E-mail Address:
2. Agent/Consultant Information (A signed and dated copy of the Agent Authorization letter
must be attached if the Agent has signatory authority for the owner/applicant.)
Name: Debbie Edwards
Company Affiliation: Soil & Environmental Consultants. PA
Mailing Address:_ _ 11010 Raven Ridge Road
Raleigh NC 27614
Telephone Number: 919-846-5900 Fax Number: 919-846-9467
E-mail Address: dedwardsCcr~,sandec.com
Page 1 of 9

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 maybe 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: West Chatham Townhomes
2. T.I.P. Project Number or State Project Number (NCDOT Only): n/a
3. Property Identification Number (Tax PIN): 0764103321, .0764103852, 0764100787
4. Location
County: Wake Nearest Town: Cary
Subdivision name (include phase/lot number): West Chatham Townhomes
Directions to site (include road numbers/names, landmarks, etc.): The project site is located
south of Old Apex Road east of Falcone Parkway west of West Chatham Street and
northeast of Hiah House Road
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): 35.7830 °N 78.7938 °W
6. Property size (acres): +/- 9 acres
7. Name of nearest receiving body of water: UT to MacGreaor Downs Lake (Swift Creek) 27-
43-2.2, WS-III; NSW
8. River Basin:__Neuse (03-04-021, Catalo ing Unit 03020201
(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/maps/.)
9. Describe the existing conditions on the site and general land use in the vicinity of the project
at the time of this application:- The project site is three vacant forested parcels of land in
downtown Carv. General land use in the vicinity of the project is primarily residential and
some commercial.
Page 2 of 9

10. Describe the overall project in detail, including the type of equipment to be used:.
The proposed project is for a residential townhome community with permanent impacts
resulting from the widening of West Chatham Street These proposed permanent impacts are
being required by the Town of Cary. Heave equipment typically used for road construction
will be employed for this project.
11. Explain the purpose of the proposed work: The purpose of the proposed work is to provide
additional housing for the area. Proposed impacts to jurisdictional areas are needed in order
to widen West Chatham Street to satis requirements by the Town of Cary
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.
On _June 27, 2005, S&EC conducted a detailed wetland delineation and Neuse River Buffer
evaluation for the entire site. On August 12, 2005 Mr. Thomas Brown of the USACE conducted
a site visit to verifyjurisdictional wetlands (Action ID# 200521210) On August 11 2005 Mr
Eric Kulz of the NC-DWO conducted a site visit to verify Neuse River Buffers and confirm
perennial vs. intermittent streams (NBRRO OS-2121 On September 13 2006 an office meeting
was held at the 401/Express Permitting Unit with Amy Chapman Travis Crissman of BNK
Matthew Danielson of Beazer Homes and Debbie Edwards of S&EC this meeting was to discuss
stormwater and diffuse flow constraints associated with this ~ 9 acre site. The details of this
meeting will be elaborated on within Section XI of this application
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 from the current application.
No additional Hermits are anticipated at this time.
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
Page 3 of 9

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.
1. Provide a written description of the proposed impacts:
The proposed impacts are to jurisdictional streams only~i a no wetland impactsl Proposed
permanent impacts are to 1151inear feet of stream for the widening of West Chatham Street
2. Individually list wetland impacts. Types of impacts include, but are not limited to
mechanized clearing, grading, fill, excavation, flooding, ditching/drainage, etc. For dams,
separately list impacts due to both structure and flooding.
Wetland Impact Type of Wetland Located within Distance to Area of
Site Number T e of Im act
yp p
(e.g., forested, mazsh, 100-year Neazest Impact

(indicate on map)
herbaceous, bog, etc.) Flood lain
p Stream acres
( )
es/no linear feet
N/A N/A N/A N/A N/A N/A
Total Wetland Impact (acres) N/A
3. List the total acreage (estimated) of all existing wetlands on the property: 0 acres of wetlands
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 Perennial or Average Impact Area of
Number Stream Name Type of Impact Intermittent? Stream Width Length Impact
indicate on ma Before Im act linear feet) acres
Im act 1
p iJT to MacGregor Permanent-Road
Perennial
~ 3'
115
0
008
Downs Lake Widening .
Total Stream Impact (by length and acreage) 115 0.008
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, dred 'n , floodin , draina a bulkheads etc
Open Water Impact
Name of Waterbody Type of Waterbody Area of
Site Number
(if applicable) T e of Im act
~ p lake and estua sound ba
( ~ p ~ D'> y~ Im act
P
(indicate on ma ocean, etc. acres
N/A N/A N/A N/A N/A
Total Open Water Impact (acres) N/A
Page 4 of 9

6. List the cumulative impact to all Waters of the U.S. resulting from the project:
Stream Im act (acres): 0.008
Wetland Im act (acres): 0
O en Water Im act (acres): 0
Total Irri act to Waters of the U.S. (acres) 0.008
Total Stream Impact (linear feet): 115
7. Isolated Waters
Do any isolated waters exist on the property? ^ Yes ®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.): N/A
Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond,
local stormwater requirement, etc.): N/A
Current land use in the vicinity of the pond: N/A
Size of watershed draining to pond: N/A Expected pond surface area: N/A
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.
This proposed townhome community was desimed to avoid all iurisdictional waters and
should have only required exempt riparian buffer impacts ,grading and revegetatin~ in Zone 2,
not compromising the health of the existin vegetation of Zone 1). However the Town of Cary
has required the widening of West Chatham Street, therefore permanent impact of 115 linear
feet of perennial stream is proposed see attached October 5, 20061etter from BNK). In
addition, this was determined by the NCDWO to be a buffered perennial stream so 4,169 ft2 of
impacts to Zones 1 and 2 are also proposed. Due to the location of this existing_perennial,
Page 5 of 9

buffered stream and the reauired road widening by the Town of C this proposed impact could
not be avoided. In addition there are 5 locations (all labeled on the overall site plan) that will
include grading and reve etating in Zone 2 all of which are exempt activities because the
health of the existing vegetation in Zone 1 is not bein compromised
VIII. Mitigation
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.
USAGE - 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 maybe 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 USAGE 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/strm~ide html.
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.
Stream mitigation is typically not reauired for permanent impacts less than 150 linear
feet; if stream mitigation shall be required the applicant will utilize the Ecosystem
Enhancement Program.
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
Page 6 of 9

website at http://h2o.enr.state.nc.us/wrp/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): 0
Amount of buffer mitigation requested (square feet): 0
Amount of Riparian wetland mitigation requested (acres): 0
Amount ofNon-riparian wetland mitigation requested (acres): 0
Amount of Coastal wetland mitigation requested (acres): 0
IX. Environmental Documentation (required by DWQ)
1. Does the project involve an expenditure of public (federal/state/local) funds or the use of
public (federaUstate) land? Yes ^ No
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 ^
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 OZB .0243 (Catawba) 15A NCAC
2B .0250 (Randleman Rules and Water Supply Buffer Requirements), or other (please
identify Meuse )? Yes ® No ^
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.
Page 7 of 9

WEST CHATHAM ROAD WIDENING
Tmn~n+
Zone*
Multiplier
Required
1 3,580 3 (2 for Catawba) N/A
2 589 1.5 N/A
Total 4,169 N/A
* Zone 1 extends out 30 feet perpendicular from the top of the near bank of channel; Zone 2 extends an
additiona120 feet from the edge of Zone 1.
XI.
XII.
3. 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 attach all appropriate information as identified
within 1 SA NCAC 2B .0242 or .0244, or .0260.
Riparian buffer mitigation is not required for the proposed impacts These riparian buffer
impacts are considered allowable because the impacts are associated with an impact to
subiect surface waters the im act is gt-eater than 40 linear feet but less than 150 linear feet
and 1/3 acres of riparian buffer impacts
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.
The impervious surface erp centage is greater than 30% post construction• a breakdown of the
impervious surfaces are included in a table attached to this application The develo ep r 1S
proposins? a constructed wetland to treat onsite and some additional offsite stormwater We have
included the DWO 401 Extended Detention Wetland Worksheet Water Quality Retention
Calculations. a signed and notarized Operations and Maintenance Agreement for the Extended
Detention Wetlands and a constructed wetlands detail sheet C3.3.
Homes and Debbie Edwards of S&EC In this meeting there were three (31 important topics
discussed: 1) The existing Stormwater drainage piping onsite• 2) The site constraints with re and
to treating new impervious surface area at the southern end and a portion of the eastern side of
the project site• and 31 The proposed Stormwater treatment plan The outcome of this meetin is
summarized in an attached email dated 9/13/06.
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.
A sanitary sewer system will be utilized for the proposed subdivision and will tie into
existing adiacent lines.
Page 8 of 9

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 anafter-the-fact permit application? Yes ^ No
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 ^
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
http://h2o.enr.state.nc.us/ncwetlands. If no, please provide a short narrative description:
We have reviewed the "DRAFT Internal Policy Cumulative impacts and the 401 Water Ouality
Certification and Isolated Wetland Prog~'ams" document prepared by the NC Division of Water
Quality on April 10, 2004 version 2 1 The draft states that most residential subdivisions are
unlikely to cause cumulative impacts West Chatham Townhomes does not meet any of the three
criteria of private projects that can clearly result in cumulative impacts We anticipate that you
will advise us if a qualitative or quantitative impact analysis is required
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/Agent's Signature Date
(Agent's signature is valid only if an authorization letter from the applicant is provided.)
Page 9 of 9

T~ ~ti`ham It h%Sa~ ~o~cexzx< .
..
~ ~e current o rte owner, h~r~~iy cinsite and autitori :-~cslr ~rtt~3%nnrn~r~t~l. Ct~rultants, pt~ tea
act in my ~~ia~f a.~ eny ag~nfi ire the ~arvc~s~i~:g ~f p~i'n~ ap~ii~iQns~ to f~x~sli.r~por- request
stipplementa7 zafci~t~tio~ in sup~rt ~~ ,app.~ic~tiars, efic, front thzs ~~~ fo. rwar~i.. Tta ~f ~~ ,~a~= :cif
~c~Q~___7--~ ,~
~ii~ z~ii~ca~~~ ~t~~:rse~as an~~~iaus CC-r}~on~e2tc~. ~c~r~~rz~in~ t'~e a~~t fir ~ prt>ject,
N'4TTCE. Tk~xs ~+u~itrrs~afiQn,:f~rliai~ll~t#~%a~d.prv;E~ss.al..c~i~cu#~s~ a~a;~c~, is vatid c~ri1y far
~crv~~ein# ctai~ tct .ester #e ~~!F'~rt3' n*lxen ac~cs~npanied by ~8~E~ ~ta:£f. 1'at~ ahc~uld caii
to arrart~e a: site:rn~efiiri,~~ria~;to tx3s~i'tg tfte bite.
t,t.}~r~f: if ~ ~4R~~ z ~ C
C'rirt Pr~rp~i~~ Hex`s Nasat
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23b I.~E'hiiti~~ C~x~it: Ssite 'v .
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iii & Ert~~ir~r+.m~~alal ~~#n;~ultit~, [~~'~

3Y17-~: I~wnsl~l~ T],A~~

Sent Hy: SYRACUSE PLASTICS OF NC; 9194601013; Aug-10-05 10:01; Page 2/2
~9
Envxronmer~tal Consultants, ~',A-.
Rned RaleiSh, North Calalim 27614 Phone:19193 B46-5900 FK: (919) a46-9467
wwwSaadEC.com
AGFNC AUTHORIZATION F(]RM
All Blanks To Be Filled In. B The Current Lai
Project Nance/Description:
Date: ~~~ ~~,~.~~-•- !~, ~C1 ~~
The Uepartu~ent of the Army
US. Army Corps of Engineers. Wiluw~tgtcm District
P.O. Box 1890
Wilaw•egton, NC 28402
Attn: ~~~ i ~ ~ ~t.t' /`-
Field Office: ~~.c:s Yt~.._~...._:_..,_ .
Ice: Wetlands Related C-cxisulting and permitting
To Whom It May Concern:
SdsEC Project ~,
I, the current ro r owner, hereby designate and authorize Soil & finvirotunental Consultants PA to
act ht my behalf as my eg~nt~in the procet~ng of permit appIi~cations, to furnish upon request
supplen~entai information in~upport of applications, etc. from this day forward. The _ ~`. _•dsy of
~ DS
This notification supersedes any previous cort+e~pondence concerning the agent for this project.
Nt7TICE: 'T'his autlwrszation, far f3Ability snd pcofesaionnl catutesy rcagona, is valid only for
gvverument officials to enttr tltie property when accompanied liry ~adclrC atAff. You should call S&13C
to utange a site meeting prior to visiting the site.
~--^ `__
Print Property Owner's Name C}}~_ ~ Q~- _ L ~~' . p~ Owners S' !~
I~t3' ~ _.
oc: Ms. Cynlii KarolY c+c: Mr. Bob 2arzerki
NCDENR - DWQ Soil dz Enrriroxut,ental Corta~ittants, PA
x321 Crabtree-Boulevard
Raleigh, NC 27604
Lbar~.4~cs:
2361r.PLillip Coup. Suico C 981!9-8 I.av~aie ~~
Concord. NC 281125
F'6~«~c: (704) 72(1-4605 Gtoeostoro. PiC 27455
Phonc: (336) 5445234
Fex: (7174) 7Z(1-9406 Fax: [phone]

Project Number:
9654.W2
Project Manager:
DE
Scale:
I" = 2,000'
Date:
08/24/06
Map Title:
FIGURE I -USGS Map
West Chatham
Townhomes
Wake Co., NC
Source:
Gary Quadrangle
O Co -- l0 5 t v 2
Soil & Environmental Consultants, PA
11010 Raven Ridge Rd.• Raleigh, NC 27614
(919}846-5900 •(919)E46-9467
Web Page: wwnv.SandEC.com

SITE
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U.S. ARMY CORPS OF ENGINEERS
WILMINGTON DISTRICT
Action Id. 200521210 County: Wake U.S.G.S. Quad: C~
NOTIFICATION OF JURISDICTIONAL DETERMINATION
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Property Owner/Agent: Cary Park, LLC ~ .
Address: PO Box 1067 ~~ cs~
Cary, NC 27512 ~~ `~ ~ i
Telephone No.: 919-467-5151 ~o-+____3--' ~
Property Owner/Agent: David L. Morean/ Rowene M Chandler ~ „_,.~,,..
Address: 2_BallymenaCourt ~~,
Catonsville, MD 21228
Telephone No.: 443-984-1540, 410-599-6556
Size and location of property (waterbody, road name/number, town, etc.) The Uroperty is located on the east side
of Falcone Parkway. south of Old Anex Road (SR16161 in Carv Wake County NC
Indicate Which of the Followin Apply:
_ Based on preliminary information, there maybe Streams on the above described property. We strongly suggest
you have this property inspected to determine the extent of Department of the Army (DA) jurisdiction. To be
considered final, a jurisdictional determination must be verified by the Corps.
X There are Streams on the above described property subject to the permit requirements of Section 404 of the
Clean Water Act (CWA)(33 USC § 1344). Unless there is a change in the law or our published regulations, this
determination may be relied upon for a period not to exceed five years from the date of this notification.
_ We strongly suggest you have the Streams on your property delineated. Due to the size of your property
and/or our present workload, the Corps may not be able to accomplish this wetland delineation in a timely
manner. For a more timely delineation, you may wish to obtain a consultant. To be considered fmal, any
delineation must be verified by the Corps.
_ The Streams on your property have been delineated and the delineation has been verified by the Corps. We
strongly suggest you have this delineation surveyed. Upon completion, this survey should be reviewed and
verified by the Corps. Once verified, this survey will provide an accurate depiction of all areas subject to
CWA jurisdiction on your property which, provided there is no change in the law or our published
regulations, maybe relied upon for a period not to exceed five years.
X The Streams have been delineated and surveyed and aze accurately depicted on the plat signed by the Corps
Regulatory Official identified below on October 26, 2005. Unless there is a change in the law or our
published regulations, this determination maybe relied upon for a period not to exceed five yeazs from the
date of this notification.
_ There are no waters of the U.S., to include wetlands, present on the above described property which are subject
to the permit requirements of Section 404 of the Clean Water Act (33 USC 1344). Unless there is a change in
the law or our published regulations, this determination may be relied upon for a period not to exceed five years
from the date of this notification.
_ The property is located in one of the 20 Coastal Counties subject to regulation under the Coastal Area
Management Act (CAMA). You should contact the Division of Coastal Management in
Washington, NC, at [phone] to determine their requirements.
Remarks:
Corps Regulatory
Date October 26, 2005 Expiration Date October 26, 2010
Page 1 of 2

Action Id. 200521210
Placement of dredged or fill material within waters of the US and/or wetlands without a Department of the Army
permit may constitute a violation of Section 301 of the Clean Water Act (33 USC § 1311). If you have any
questions regarding this determination and/or the Corps regulatory program, please contact Thomas Brown at 919-
876-8441 x22.
Basis For Determination: Areas on this site exhibit wetland criteria as described in the 1987 Corps Wetland
Delineation Manual and are adiacent to an unnamed tributary to Swift Creek. The property also contains
stream channels that exhibit an Ordinary High Water Mark as indicated by changes in soil character and
absence or terrestrial vegetation and are hydrologically connected to an unnamed tributary to Swift Creek in
the Neuse River Basin.
Corps Regulatory Official (Initial
FOR OFFICE USE ONLY:
• A plat or sketch of the property and the wetland data form must be attached to the file copy of this form.
• A copy of the "Notification Of Administrative Appeal Options And Process And Request For Appeal"
form must be transmitted with the property owner/agent copy of this form.
• If the property contains isolated wetlands/waters, please indicate in "Remarks" section and attach the
"Isolated Determination Information Sheet" to the file copy of this form.
CF: S&EC
Attn: Bob Zarzecki
11010 Raven Ridge Road
Raleigh, NC 27617

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Soil & Environn~~ C~'_ ~~
Alan W. Klimek, P.E. Director
Colleen H. Sullins, Deputy Director
Division of Water Quality
Mr. Bob Zarzecki
S&EC
11010 Raven Ridge Road
Raleigh, NC 27614
Olc -Ilo~l Y2
NBRRO 05-212
County: Wake
BASIN:
Neuse River X
(15A NCAC 2B .0233)
Tar-Pamlico
(15A NCAC 2B .0259)
Complaint NOV Buffer Determination X
Incident # Appeal Call
Project Name: Cary Park Townes Proper
Location/Directions: Site is located to the west of the intersection of High House Road and West Chatham Street,
west of downtown Cary (Wake County).
Subject Stream: UT to MacGregor Downs Lake
Date of Determination: 8/11/05
Feature

A Start Buffer
GPS Points (if provided)

Subject End Buffer Stream
Form Appeal
Call Located
on Soil
Survey
X Located on
USGS
To ogra hic
B Subject R
C Subject X

NOTE: All three features piped; subject where streams are not piped. Features A and C are perennial.
Tliis on-site determination shall expire five (S) years from the date of this letter. Landowners or affected parties
that dispute a determination made by the D WQ or Delegated Local Authority that a surface water exists and that
it is subject to the buffer rule may request a determination by the Director. A request for a determination by the
Director shall be referred to the Director in writing c% Cyndi Karoly, DWQ Wetlands/401 Unit, 2321 Crabtree
Blvd., Raleigh, NC 27604-2260. Individuals that dispute a determination by the DWQ or Delegated Local
Authority that "exempts" a surface water from the buffer rule may ask for an ad judicatory hearing. You must
act within 60 days of the date that you receive this letter. Applicants are hereby notified that the 60-day statutory
Raleigh Regional Office
Water Quality Section
1628 Mail Service Center
Raleigh, NC 27699-1628
~~'
. ~;!
a~lCGEI~;I't
Michael F. Easley, Governor
William G. Ross Jr., Secretary
Carolina Department of Environment and Natural Resources
phone {919) 571-4700 Customer Service
facsimile {919) 571-4718 1-877-623-6748

8/17/2005
Page 2 of 2
appeal time does not start until the affected party (including downstream and adjacent landowners) is notifred of
this decision. DWQ recommends that the applicant conduct this notification in order to be certain that third
party appeals are made in a timely manner. To ask for a hearing, seied a written petition, which conforms to
Chapter ISOB of the North Carolina General Statutes to the Office of Administrative Hearings, 6714 Mail
Service Center, Raleigh, N.C. 27699-6714. This determination is final and binding unless you ask for a hearing
within 60 days.
Tlie (owner/future owners) should notify the Division of Water Quality (including any other Local, State, and
Federal Agencies) of this decision concerning any future correspondences regarding the subject property (stated
above). This project may require a Section 404/401 Permit for the proposed activity. Any inquiries should be
directed to the Division of Water Quality (Central Office) at (9l9)-733-1786, and the US Army Corp of Engine r
(Raleigh Regulatory Field Office) at (9l9)-876-8441.
R ctfully
Eric W. Kulz /~
Environment Spec.
CC: File Copy
Central Files
DWQ 401/Wetlands Office
Tom Horstman -Town of Cary
Raleigh Regional Office 1628 Mail Service Center
Water Quality Section Raleigh, NC 27699-1628
r=~r
~~~
t~U
phone [phone] Customer Service
facsimile [phone] 1-877-623-6748

965Qe~No. i°igure 1 - USGS Map
Project Mgr.: CARY PARK TOWNES
TPlSC Wake, NC
Scale:
1" = 2,000'
06/a7/OS Cary Quadrangle
.~
Soil & Environmental Consultants, PA
11010 Rav®n Ridge Rd.• Ral~gh, NC 27614
~(919j 8~6-5900 • [phone]
W®b Page: w~.SandEC.com
O to - I l0 5 ~ Y 2
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.Q~ F « k r.
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8654.W1 ~~ ~ Figure ~ ~ Soil Sul~ey Mai
' j Soil & Environmental Consultants, PA
Project Mgr;: a101Q Raven Ridge Rd.• Raleigh, NC 27614
TP(SC CRRI' PAF2K`TOWNES (9t9} 84fr5~0 ~ (919} 84&-9461
Wake, NC Web Pager www.SandEC.com
Scale
~__._.._-L____. _ ___J
1r`~~ke County Soi! Survey i ~ to ~ In S l Y Z
06/27/05 PJov~naber, 1970
~ ~~
~,

}
~~;~~as
Dlo- 11051 Y2.

Page 1 of 2
Debbie Edwards
D lrc - I b 5 1 V 2,
From: Travis Crissman [[e-mail])
Sent: Wednesday, September 13, 2006 10:46 AM
To: 'Matthew Danielson ; [e-mail]; 'Amy Chapman ;Debbie Edwards;
[e-mail]; [e-mail]
Subject: West Chatham T/H DWQ Meeting 9-13-06
Hello All,
I wanted to summarize the discussions from today's meeting:
Attendees:
Matthew Danielson (Beazer)
Robbie Bell (BNK)
Travis Crissman (BNK)
Debbie Edwards (S&EC)
Amy Chapman (DWQ)
BNK began by discussing the existing conditions onsite and pointing out the existing 60" and 48" pipes that go
through the site, connecting 3 buffers together. It was discussed that these pipes were constructed in
approximately 1990 (according to the Town of Cary).
Next the group discussed what treatment measures Beazer is proposing for this site, which is a constructed
wetland. The constructed wetland will treat onsite impervious areas as well as significant offsite impervious area
on West Chatham Street and approximately 1.4 acres from across West Chatham Street. The constructed
wetland would discharge directly to the stream within the buffer at the southern end of the property (near the
intersection of Chatham and High House).
BNK outlined how Beazer proposes to reroute the existing 60" and the 48" to accommodate their development
plan for this property. The rerouting would not disturb any buffer areas because it would tie in to existing pipes
outside the buffers. BNK asked DWQ if treatment would be required for the flow conveyed by these rerouted
pipes (which have a combined drainage area of approximately 50 acres) and DWQ indicated that if the rerouting
process does not increase the flow in these pipes then the activity would be "Allowable", although not "Exempt".
DWQ indicated that when completing the Pre-Construction Notification (PCN), the determinations made by DWQ
at today's meeting should be noted.
BNK also stated that the Town of Cary is requiring Beazer to widen West Chatham Street as part of this project.
The buffer at the southern end of the property is directly adjacent to the existing and proposed right of way and
limits the ability to treat a small portion of this widened pavement. BNK provided DWQ an illustration showing that
a significant portion of the proposed widened pavement will be treated in the onsite constructed wetland as well
as an additional amount of treatment of existing pavement on West Chatham Street. The illustration indicates
that the widening will add about 1500-2000 sf of pavement, while the stormdrainage proposed for the widened
section will treat a portion of the widened pavement and a significant amount of existing pavement, totaling
approximately 18,000 sf. Additionally, this project would treat approximately 1.4 acres of area that is conveyed
onto the site via a culvert under West Chatham Street. This would bring the total amount of offsite treatment in
the constructed wetland to approximately 1.8 acres.
BNK asked if this small amount of widened pavement could go untreated since so much surplus treatment is
being provided. DWQ indicated that some research would be required and it was agreed that BNK would follow
up on this tomorrow (Thursday). A subsequent email will relay the outcome of this conversation.
BNK left the grading and drainage sheet from the plans and the illustration showing the "overtreatment" of existing
pavement on West Chatham Street with DWQ.
Meeting was adjourned.
9/13/2006

Page 2 of 2
I think that should cover everything. Please "Reply All" if I have missed anything or if there are any corrections.
J. Travis Crissman, P.E.
Bass, Nixon 8~ Kennedy, Inc.
6310 Chapel Hill Rd., Ste. 250
Raleigh, NC 27607
Phone: [phone] ! 800.354.1879
Fax: [phone]
Tra_yis,Crissman@bnkinc _com
9/13/2006

ota - ~c,s~ v2,
BASS, NIXON & KENNEDY, INC., CONSULTING ENGINEERS
6310 CHAPEL HILL ROAD, SUITE 250, RALEIGH, NC 27607
919/851-4422 FAX [phone] BNKCa~BNKinc.com
October 5, 2006
NC Division of Water Quality
401/Wetlands Unit
2321 Crabtree Blvd, Suite 250
Raleigh, NC 27604
REF: West Chatham Townhomes
Letter of Justification for Stream Impact
Dear Sir or Madam:
This letter is to provide justification for the stream impact for the buffered stream adjacent to
West Chatham Street in Cary, NC. This project is to construct 80 townhome units on a parcel
bordered by High House Road, West Chatham Street, and Old Apex Road. As part of the
project, the Town of Cary is requiring the developer to widen West Chatham Street, which will
result in impacts to the stream that is near the intersection of West Chatham Street and High
House Road. The widening of this street will require additional paving, sidewalk, curbing, and
the extension of a box culvert.
Had the Town of Cary not required widening of West Chatham Street, there would have only
been exempt impacts (grading in zone 2) for this project.
Please do not hesitate to call me if you have any questions regarding this project.
Sincerely,
Bass, Nixon 8~ Kennedy, Inc.
/~~.oati~ a.~,..
. Travis Crissman, P.E.
jtc

Explanation for why marsh areas do not meet minimum area reguirements•
This constructed wetland required 2 forebays to accept flow from the two storm outlets
for the project. With this wetland designed to have forebays at 20% of the total volume,
there was not 70% of the permanent pool surface area left in the main pool so it would
have been impossible to achieve the required 35% area for each of the marsh areas.
This wetland provides 25% 0-9" marsh and 28% 9-18" marsh area.
The Micropool is approximately half of the flow length of the meandering center of the
wetland. It provides 322 square feet of surface area at the bottom of it. In order to
provide as much marsh area, the micropool needed to be smaller.

o~- ~t~st v'2.
Table of Impervious Surfaces
West Chatham Townhomes
Surface Description Area (sf) Area (ac)
Sidewalk 11,257 0.26
Buildin s 87,796 2.02
Streets/Driveways 97,254 2.23
Total 196,307 4.51

Beazer tl,oIIle5 l:orp. 'xaleigri lllvlslon
~~~ 581 t Glen. wood Avenue, Suite 200
.%~> Raleigh, North Carolina 27612.
Bea~~Y (9]9)881-9350
BA~oNE,NA - NO. 33031137.
CHICAGO, ILLINOIS
PAYABL7THROUGHFCCNATIONALBANK C>2-TS/311
WII.MII~IGTON, DELAWARE
H'om¢8
ISSUE AMOUNT
DATE
10/12/06 $*******200.00
' PAY ': TWO HUNDRED AND 00/100 *~*,~****~**+****~****:r,r****,r*,r+*********~*,r***********,r,t,t*,r,t,r
Two signatures Required For Checks Exceeding $10,000.00
PAY North Carplina Dept of Natural Resources ~l~
To Txa 1650 MaiLService Center 'ud~- "
ORDER Ra181 }1 ~C 27699 AUTHORIZED SIGNATURE
of g
`' VOiD IF NOT CASHED WITHIN 90 DAYS AUTHORIZED SIGNATURE
--
~~'33031 ~37ii' x:031 X00 283: 09 69699~~'

o~- ItaS~ v2
OPERATION AND MAINTENANCE PLAN
FOR
EXTENDED DETENTION STORM WATER WETLAND
This is the proposed Operation and Maintenance (O&M) Plan for the extended detention
storm water wetland at West Chatham Townhomes in Cary, NC.
1. Inspection Frequency
The treatment device and its structural components, to include the sediment forebays,
shall be inspected after every significant runoff producing rainfall event (roughly 0.5
inches of rainfall) and at least semi-annually. Inspections shall be performed by persons
of sufficient background and understanding of the structure and its intended purpose.
2. General Inspection
General inspection activities for the Extended Detention Storm Water Wetland shall
include:
a. Inspection for trash accumulation, vegetative cover including wetland plant
species, and general condition. Litter and debris shall be removed from wetland,
sediment forebays, riser trash rack and the riser drawdown orifice.
b. Check and clear drawdown orifice of any obstructions such that the drawdown of
the temporary pool occurs as intended by the design.
c. Inspect contributing storm water collection system (ie. piping, swales, riprap, etc.)
for condition and proper function.
d. Inspect sediment forebays and storm water wetland for sediment accumulations at
a minimum of every six months and after each runoff producing rainfall event.
The depth of sediment within the forebays and wetland shall be measured during
each inspection.
3. Structural Inspection
Structural inspections of the Extended Detention Storm Water Wetland shall include the
following:
a. Inspect for erosion at the forebay inlet stabilization and outflow weir, and outlet
protection apron (at flared-end sections and natural channel inlets). Identify any
deficiencies with the installed method of stabilization to include displacement of
riprap or geotextile fabric.
b. Inspect the sediment forebay and weir for function and condition (including depth
of sediment).
Page 1 of 4

Inspect for erosion along the wetland perimeter. Inspect perimeter slopes for
cracking or settling, slope stability, ground cover, the presence of undesirable or
nuisance vegetation.
d. Inspect wetland spillway structures, including but not limited to, the riser, trash
rack, barrel, outlet flared-end section, drawdown orifice, and low-level outlet for
general condition, deterioration, and proper operation. Inspect structure for
evidence of cracks or leakage in structure. Maintenance (low-level) outlet valve
shall be checked for complete function during each inspection. The valve shall be
moved to the full open position for a brief period during each inspection.
4. Maintenance and Repairs
Maintenance and repair activities shall include:
a. Repair eroded areas to include embankment or perimeter slopes immediately,
reseed as necessary to maintain good vegetative cover. Mow embankment cover
to maintain maximum height of six inches, remove unwanted woody vegetation as
needed.
b. Make repairs to contributing storm water collection system to maintain proper
function.
c. Remove accumulated sediment and debris from wetlands and basin as required
described below:
Forebays -Sediment within the forebay shall be removed when the depth
of sediment reaches one-half of the forebay depth at the invert. The
measuring device used to determine the sediment elevation shall be such
that it will give an accurate depth reading. When the depth reading
indicates 2.25 feet, sediment shall be cleaned out of the forebays.
Storm Water Wetland - If the elevation of the marsh area exceeds the
permanent pool elevation by more than 12 inches (other than as designed),
the wetland shall be regraded to design levels (0" to 12" above permanent
pool). This shall be performed by removing the upper 6 inches of soil and
stockpiling it. Then the marsh area shall be excavated to the permanent
pool elevation. Afterwards the stockpiled soil should be spread over the
marsh surface such that its elevation ranges between 0" and 6" above the
permanent pool. The soil should not be stockpiled for more than two
weeks. Replant wetland surface as described in construction drawings.
NOTE: Removed sediment from any device shall be disposed of in an appropriate
manner (in accordance with local, state, and federal regulations) and shall be
handled in a manner that will not adversely impact water quality.
Page 2 of 4

d. Wetland plant densities and species shall be maintained and re-planted in bare
areas as needed. Water newly planted species at a rate of not less than I-inch per
week (including rainfall) for a period of 90 days after planting.
e. Water entire storm water wetland planted area as necessary during periods of
drought to ensure plant health and vegetation density..
f. If the wetland must be drained for an emergency or for maintenance purposes, the
flushing of sediment through the emergency drain shall be minimized to the
maximum extent practical.
It shall be the responsibility of the Owner to schedule the repair of any deficiencies noted
during an inspection.
A permanent maintenance and inspection easement will be granted to NCDENR -
Division of Water Quality (DWQ) and maintained by the Owner to provide access to the
storm water wetlands. It will be the responsibility of the Owner to secure the appropriate
agreements with future owners should the property be subdivided or sold. Inspections and
maintenance (routine or otherwise) and their scheduling will be the responsibility of the
Owner.
Page 3 of 4

ACKNOWLEDGEMENT:
I acknowledge and agree by my signature below that I am responsible for the
performance of the above listed inspection and maintenance procedures. I agree to notify
NCDENR - DWQ of any problems, other that routine maintenance, with the system prior
to any changes toCt~h/e~system or responsible party.
Print Name: ~ ~ / ~.•J ~ rJ a2. ~~a
Title: ~~c
Address: ~~~
Phone: ~~I~

Signature:
~_ O ' ..
~'pTARy y
* * ~EAL
. = ~i~ PUBLIC .
v:
My commission expires 1 - ~ O' ZO1 C7 ~b.,,~4U~NZy~;•`~~
- ~~~ 3 J ~~
Date: j/~`~/~~/
I, ~~ `~ • C LL 1 ~''rl , a Notary Public for the State of North Carolina,
County of ~a~-Q- , do hereby certify that 1"Y1a~Q~ p~"-~~-'~ SO~"1
Personally appeared before me this 1`~ day of Ja~~r~ ,2C~p'~ ,and
acknowledged the due execution of the forgoing wetland detention maintenance
requirements. Witness my hand and official seal, ~~,,,,,,~r
Page4of4