20060659 Ver 1_More Info Received_20080317

WITHERS L~? RAVEN EL
ENGINEERS I PLANNERS I SURVEYORS
ii-1 MacKenan Drive I Cary, North Carolina 27511
tel: [phone] fax: [phone]
www.withersravenet.com
TO tAC_
WE ARE SENDING YOU ? Attached ? Under separate cover via
LIEUTEQ SIF MUMADUML
DATE
a o2 JOa NO,
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ATTENTI
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RE:

the following items:
? Shop drawings ? Prints ? Plans ? Samples ? Specifications
? Copy of letter ? Change order ? Diskette ?
COPIES DATE NO. DESCRIPTION
R c.7•\ \ .
THESE ARE TRANSMITTED as checked below:
?,,6'r approval ? Approved as submitted
?,,F6 your use ? Approved as noted
As requested ? Returned for corrections
? For review and comment ?

? FOR BIDS DUE
REMARKS
20 ? PRINTS RETURNED AFTER LOAN TO US
COPY TO EA,
40% Pre-Consumer Content •109%Post-Consumer Content SIGNED-T.>,,
If enclosures are not as noted, kindly notify us at once.
? Resubmit copies for approval
? Submit copies for distribution
? Return corrected prints

March 14, 2008
WITHERS L? RAVEN EL
ENGINEERS 1 PLANNERS I SURVEYORS
NC-Division of Water Quality
Attn: Mr. Ian McMillan
2321 Crabtree Blvd.
Raleigh, North Carolina 27604
Re: Request for Additional information - Trenton Rd Subdivision
W&R Project #: 02050018
DWQ Project #: 06-0659
Dear Mr. McMillan,
We received your request for additional information regarding the stormwater devices for the Trenton
Road Subdivision. I have included a brief response to each of your requests below. We have also
revised the PCN application to include the buffer impacts associated with the level spreader bypass
swales and additional driveway crossings. One of the driveways was moved to avoid a wetland impact.
Your letter asks for the following information:
1) Please EITHER re-locate the level spreader to a location with appropriate slopes in the filter
strip OR provided a BMP that removes 30 or more percent of the nutrients rather than using a
level spreader.
The level spreader has been re-located to an area with appropriate slopes.
2) For the proposed dry detention pond and the other two proposed level spreaders, please
provide an up to date DWQ BMP Supplement Form with all the required items.
Up to date level spreader and Dry Detention Basin supplement forms are included in the
attachments.
Please feel free to call if you have questions or require additional information.
Sincerely,
WITHERS &-RAVENEL, INC.
-? / aaa??tttl.?? gCCC i ~` ?
Todd Preuninger
Director of Wetlands and Biological Sciences MAR 1 7
Attachments: or 11- :va:i E'
V??11 ANpS AND eYGRtv1N ???
1) Request for Additional Information Letter
2) Revised PCN
3) Revised Site Plans
4) Level Spreader & Dry Detention Basin Supplement Forms (3)
5) O & M Agreements (2)
iii MacKenan Drive i Cary, NC 27511 1 tel: [phone] fax: [phone]oo8 i www.withersravenel.com
7040 Wrightsville Avenue i Suite 1o1 i Wilmington, NC 28403 1 tel: [phone] fax: [phone]
Brunswick Surveying 1 1027 Sabbath Home Rd, SW i Supply, NC 28462 1 tel: 91o.842.9392 i fax: [phone]o19
Office Use Only: Form Version March 05
USACE Action ID No. DWQ No.
k1l ally panicuiar Item is not apphcanle to this project, please enter "Not Applicable" or "N/A".)
1. Processing
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 Pen-nit Number(s) Requested: NWP
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 details), 7173 r
II. Applicant Information
Owner/Applicant Information uG4v???o,?r
Name: Trenton Road LLC. A T NOS AND STORMWATER BRANCH
Mailing Address: Attn: Jeff Smerko
105 Quail Ridge Road
Wilmin on NC 28409
Telephone Number: 910-232-4375 Fax Number: 910-397-8751
E-mail Address: jrsmerkoC&nc.rr.com
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: Todd Preuninger
Company Affiliation: Withers & Ravenel Inc.
Mailing Address: 114 MacKenan Drive
Telephone Number: 919-469-3340 Fax Number: 919-535-4545
E-mail Address: tpreuningergwithersravenel.com
Pagel of 8
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: Trenton Road Subdivision
2. T.I.P. Project Number or State Project Number (NCDOT Only): NA
3. Property Identification Number (Tax PIN): 0775.02-75-5892, 0775.02-75-1253 0775.02-75-
5370, 0775.16-94-0819
4. Location
County: Wake Nearest Town:_ Raleigh
Subdivision name (include phase/lot number): Trenton Road Subdivision
Directions to site (include road numbers/names, landmarks, etc.): The site is located roughly 1.3
miles north of the intersection of Trinity Road (SR 1656) and Trenton Road (SR 1655)
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): 35.8243230 ON 78.7404565 °W
6. Property size (acres): 32.99 Acres
7. Name of nearest receiving body of water: UT Richland's Creek
8. River Basin: Neuse River Basin
(Note - this must be one of North Carolina's seventeen designated major river basins. The
River Basin map is available at http://h2o.cnr.state.nc.us/adniin/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 site is currently wooded Land use in the vicinity of the
project is primarily residential.
Describe the overall project in detail, including the type of equipment to be used: The
proposed project consists of the construction of driveway crossings needed to access four lots in the
Page 2 of 8
subdivision. Typical heavy equipment such as-excavators will be used to install the subdivision
infrastructure-
10. Explain the purpose of the proposed work: To provide access to four lots within the subdivision
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. Detailed wetland delineations were conducted and approved by the USACE on
February 25, 2006 (AID#: 200520875) Ms Cynthia Van Der Wiele of the NC-DWO confirmed our
riparian buffer evaluations in August of 2005 (DWQ EXP• 05-1496) We have included a copy of the
Jurisdictional Determination and the DWQ Letter with the attachments
V. Future Project Plans
Are any future pen-nit requests anticipated for this project? If so, describe the anticipated work,
and provide justification for the exclusion of this work from the current application.
None Anticipated.
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.
Provide a written description of the proposed impacts: The proposed impacts consist of. 80
linear feet of important/perennial steam channel and 0 19 acres of the Neuse riparian buffer (Zone 1
5,320 S.F., Zone 2: 3,275 S.F.) for the construction of four residential driveways In addition 0.05
acres (Zone 1: 1572 S.F. Zone 2: 876 S.F.) of riparian buffer will be impacted for the installation of
bypass structures associated with the level spreaders
Page 3 of 8
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
Type of Impact
(e.g.
forested
marsh 100-year Nearest Impact

(indicate on ,
,
,
herbaceous
bog
etc.)
Floodplam
Stream
(acres)
map) ,
, (yes/no) (linear feet)
NA NA NA No NA NA
Total Wetland Impact (acres) NA
3. List the total acreage (estimated) of all existing wetlands on the property: < 5 acres
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- multinly length X width then divine by 41 S60
Stream Impact Perennial Average Impact
Number
Stream Name
Type of Impact or Stream Length Area of
Impact
(indicate on Intermittent Width Before (linear
ma) ? Impact feet) (acres)
Driveway A UT Richland's Permanent Perennial 3-5' 20 0.002
Driveway B UT Richland's Permanent Perennial 3-5- 20 0.002
Driveway C UT Richland's Permanent Perennial 3-5' 20 0.002
Driveway D UT Richland's Permanent Perennial 3-5' 20 0.002
Total Stream Impact (by length and acreage) 80 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. dredging- flondino drninnoe hnikheadc etr
Open Water

Impact
Name of Waterbody Type of Waterbody Area of

Site Number
(if applicable) Type of Impact
(lake, pond, estuary, sound,
Impact
(indicate on map) bay, ocean, etc.) (acres)
NA NA NA NA NA
Total Open Water Impact (acres) NA
6. List the cumulative impact to all Waters of the i J_S_ resulting from the nrniect-
Stream Impact (acres): 0.008
Wetland Impact (acres): NA
Open Water Impact (acres): NA
Total Impact to Waters of the U.S. (acres) 0.008
Total Stream Impact (linear feet): 80
7. Isolated Waters
Do any isolated waters exist on the property? ? Yes ®No
Page 4 of 8
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.): NA
Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond,
local stormwater requirement, etc.): NA
Current land use in the vicinity of the pond: NA
Size of watershed draining to pond: NA Expected pond surface area: NA
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. Prior to site plan development, the
applicant requested that a detailed wetland delineation be conducted so that impacts to wetlands and
`waters' could be minimized. With the exception of 4 driveway crossings, no other streams or wetlands
will be impacted by the proposed project. In order to access four parcels within the Trenton Road
Subdivision, impacts to waters could not be avoided. To minimize impacts each driveway was designed
to be at a nearly perpendicular angle to the stream, and the crossings are located at a point where the
stream contains very few meander bends.
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.
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
Page 5 of 8
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. Because impacts to the stream channel are less than 150
If and total buffer impacts are less than 1 /3 acre we do not believe that mitigation is required
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/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): NA
Amount of buffer mitigation requested (square feet): NA
Amount of Riparian wetland mitigation requested (acres): NA
Amount of Non-riparian wetland mitigation requested (acres): NA
Amount of Coastal wetland mitigation requested (acres): NA
IX. Environmental Documentation (required by DWQ)
1. Does the project involve an expenditure of public (federal/state/local) funds or the use of
public (federal/state) 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
Page 6 of 8
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
(Neuse), 15A NCAC 2B .0259 (Tar-Pamlico), 15A NCAC 02B .0243 (Catawba) 15A NCAC
213 .0250 (Randleman Rules and Water Supply Buffer Requirements), or other (please
identify Neuse )? 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.
Zone* Impact Multiplier Required
(square feet) Mitigation
1 6,892 3 (2 for Catawba) NA
2 4,151 1.5 NA
Total 11,043 NA
* 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.
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 15A NCAC 213.0242 or.0244, or.0260. NA
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. The percent impervious for this project is expected to
be approximately 17%. The applicant will provide diffuse flow into the buffer thouth the use of level
spreaders and a dry detention pond as per NC-DWQ guidelines A copy of the Stormwater management
plan and level spreader operation and inaintenance agreement is included with the attachments During
construction the applicant will utilize BMP devices to prevent sediment from entering jurisdictional
stream channels or wetlands.
Page 7 of 8
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.
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
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: Much of
the surrounding area has already been developed; therefore we do not believe that this project will lead to
additional development or impact downstream water quality. In order to protect downstream water
quality, the applicant will employ the appropriate BMP's / erosion control measures during construction
Following construction the applicant will maintain 50' riparian buffers & provide stormwater treatment
before it enters the adiacent creeks or wetlands.
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 at
(Agent's signature is valid only if an authorization letter from the applicant is provided.)
Page 8 of 8
LEVEL SPREADER OPERATION AND MAINTENANCE AGREEMENT
The level spreader is defined as an elongated, level threshold, designed to diffuse stormwater runoff.
Maintenance activities shall be performed as follows:
1. After construction and until vegetation has been established, level spreader(s) shall be inspected after
every rainfall. Thereafter, level spreader(s) shall be inspected at least every month and more
frequently during the fall season and after heavy rainfall events:
a. Accumulated sediment, leaves, and trash shall be removed, and repairs made if required.
b. Inspect level spreader(s) for evidence of scour, undercutting, settlement of the structure, and
concentrated flows downhill from the level spreader(s).
c. A level elevation shall be maintained across the entire flow-spreading structure at all times.
Repair or replace the level spreader if it is damaged.
d. Mow vegetative cover to a height of six (6) inches and prune plants if they cover over half of the
level spreader surface.
e. Repair eroded areas and replace/replant dead or damaged vegetation.
2. The contractor should avoid the placement of any material on and prevent construction traffic across
the structure. If the measure is damaged by construction traffic, it shall be repaired immediately.
3. Inspect and repair the collection system (e.g., catch basins, pipes, swales, riprap) four (4) times a year
to maintain proper functioning.
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.
Print name:
Title: By: ]
Address:
Phone: (`-
Signature
Date:
President
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, c r ?? ?L L (l s a Notary Public for the State of l o - C ( ^k
County of J ,L)c- l? e do hereby certify that
A. k r 1 _ S vLr ;- (<o
personally appeared before me this day of 2 C, C'- and acknowledge the due
execution of the forgoing wet detention basance requirements. [wetland] Witness my hand and
official seal,
BARBARA E ELLES 4
NOTARY PUBLIC 4 b ' C,
WAKE COUNTY, NCJ c (o c; ; 1? ( l ?-S
v Commission Expires 7-11-2011
SEAL My commission expires -) - //- /(
Page 1 of 1
STORMWATER CONTROL STRUCTURE MAINTENANCE AGREEMENT
PROJECT: ? 220j, a ba 1 ut \O'?\ _ :P
RESPONSIBLE PARTY: Trenton Road LLC PHONE #: [phone]
ADDRESS: 14600 Weston Parkway, Suite 300
Cary, NC 27513
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.
ll. 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. Mow side slopes according to the season. Maximum grass height to be six (6) inches.
b_ All components of impoundment system to be kept in good working order.
c. In case the ownership of the Impoundment Transfers, the current owner shall, within thirty (30) days
of transfer of ownership, notify the Town of Cary Engineering Department, Stormwater
Management Division of such ownership transfer.
d. This property and impoundment is also subject to the Operation and Maintenance Manual filed with
the register of deeds.
I, Trenton Road LLC , 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 Compliay with Stormwater Regulations received for this project.
renton Road LLC
By: Five Star Development of NCB Inc., Manager
Signature: ate: June 5, 2007
By - --1-?
e e S ko, President i
a Notary Public for the State of ?1=County of `?-
do hereby certify that `Z ^Se:-hc, personally appeared before me this 5 day of
And acknowledge due execution of the foregoing instrument. Witness my
h d and official seal
RA E ELLES
Seal y RY PUBLIC My commissionexpires: OUNTY, NC 9 (-r n Expires 7-11-2011
ckc -I - 6
Maintenance Agreement ( L l ?S
??F ?y n ?9Q Michael F. Easley, Governor
William G. Ross Jr., Secretary
r- North Carolina Department of Environment and Natural Resources
Q Coleen H. Sullins, Director
Division of Water Quality
January 17, 2008
CERTIFIED MAIL: RETURN RECEIPT REQUESTED l .J?. 141k'?', ?b
tgep z??e
Mr. Jeffrey Smerko s
Trenton Road, LLC
105 Quail Ridge Road
Wilmington, NC 28409
Subject Property: Trenton Road Subdivision
Richlands Creek [030402, 27-33-11, C, NSW]
REQUEST FOR MORE INFORMATION
Dear Mr. Smerko:
On December 18, 2007, the Division of Water Quality (DWQ) received your application dated
December 18, 2007, to fill or otherwise impact 0.0004 acres of 404/wetland, 40 linear feet of
perennial stream, and 4,241 square feet of Zone 1 Neuse River basin protected riparian buffers
and 2,517 square feet of Zone 2 Neuse River basin protected riparian buffers to construct the
proposed residential development. The DWQ has determined that your application was
incomplete and/or provided inaccurate information as discussed below. The DWQ will require
additional information in order to process your application to impact protected wetlands and/or
streams on the subject property. Therefore, unless we receive five copies of the additional
information requested below, we will have to move toward denial of your application as required
by 15A NCAC 2H .0506 and will place this project on hold as incomplete until we receive this
additional information. Please provide the following information so that we may continue to
review your project.
Additional Information Requested:
The filter strip for the level spreader located at the outlet of FES 40 appears to be too
steep to allow for diffuse flow based on the incomplete topographic lines depicted on
Figure 3. Please EITHER relocate the level spreader to a location with appropriate slopes
in the filter strip OR provide a BMP that removes 30 or more percent of the nutrients
rather than using a level spreader. If you choose to provide a BMP, please provide a
DWQ BMP Supplement Form with all required items. BMP Supplement Forms are
available on the following web site: am://h2o.enr.state.nc.us/suibmp forms.htm.
401 Oversight/Express Review Permitting Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet: liup:/1h2o.enr.state.nc.us/ncwetlands
DWVIroject # 06-0659
1 ake County
One
NoCarolina
Jl wnallb
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
Trenton Road, LLC
Page 2 of 2
January 17, 2008
2. For the proposed dry detention pond and the other two proposed level spreaders, please
provide an up to date DWQ BMP Supplement Form with all required items so that the
DWQ may review those designs (available on the web site above).
Please submit this information within 30 calendar days of the date of this letter. If we do not
receive this requested information within 30 calendar days of the date of this letter, your project
will be withdrawn and you will need to reapply with a new application and a new fee.
This letter only addresses the application review and does not authorize any impacts to wetlands,
waters or protected buffers. Please be aware that any impacts requested within your application
are not authorized (at this time) by the DWQ. Please call Ms. Cyndi Karoly or Mr. Ian
McMillan at 919-733-1786 if you have any questions regarding or would like to set up a meeting
to discuss this matter.
Sin rely,
Cyndi Karoly, Supervisor
401 Oversight/Express Review Permitting Unit
CBK/i m
cc: Lauren Witherspoon, DWQ Raleigh Regional Office
USACE Raleigh Regulatory Field Office
File Copy
Central Files
Todd Preuninger, Withers & Ravenel, 111 MacKenan Drive, Cary, NC 27511
060659TrentonRoadS D(Wake)On_Ho Id
Permit No.
(to be provided by DWQ)
o`'-" v' etc
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
NCDENR °
401 CERTIFICATION APPLICATION FORM
DRY EXTENDED DETENTION BASIN SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must be printed, filled out and submitted along with all the required information.
I. PROJECT INFORMATION
Project name Trenton Road
Contact person Todd Preuninger
Phone number 919-469-3339
Date March 14, 2008
Drainage area number BMP 1
IC DESIGNINFORMATION
Site Characteristics
Drainage area 357,192.00 ftz
Impervious area 78,408.00 ft2
% Impervious 0.22
Design rainfall depth 1.00 in
Peak Flow Calculations
1-yr, 24-hr rainfall depth 3.00 in
Rational C, pre-development 0.30 (unitless)
Rational C, post-development 0.43 (unitless)
Rainfall intensity: 1-yr, 24-hr storm 7.22 in/hr
Pre-development 1-yr, 24-hr peak flow 14.39 ft'/sec
Post-development 1-yr, 24-hr peak flow 14.47 ft3/sec
Pre/Post 1-yr, 24-hr peak control 0.08 ft3/sec
Storage Volume: Non-SR Waters
Design volume 7;100.00 ft3
Sediment storage volume provided 1,775.00 ft3 K
Storage Volume: SR Waters
1-yr, 24-hr rainfall depth in
Pre-development 1-yr, 24-hr runoff volume ft3
Post-development 1-yr, 24-hr runoff volume ft3
Basin Design Parameters
Drawdown time 3.00 days 'K
SHWT elevation fmsl
Basin bottom elevation 346.00 fmsl 0K
Storage elevation 351.00 fmsl
Basin side slopes 3.0 :1 "K
Top elevation 352.00 fmsl <
Freeboard provided 1.00 It
Basin Bottom Dimensions
Basin length 140.00 ft
Basin width 50.00 ft
Length to width ratio 2.80 :1 K
Additional Information
Total runoff volume captured by basin 2.05 ac-in Fa eay is not eau red
Forebay provided N (Y or N)
Is basin in a recorded drainage easement? Y (Y or N) CK
Does basin capture all runoff at ultimate build-out? Y (Y or N) QK
Is a sediment depth indicator included? Y (Y or N) ;K
Does the basin include a drain? Y (Y or N) ^K
Form SW401-Dry Extended Detention Basin-Rev.2 Parts I. 8 II. Design Summary, Page 1 of 2
Permit No
(to be provided by DWQ)
Jill, 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.
Pagel Plan
Initials Sheet No.
e
f%.
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),
- Basin dimensions,
- Pretreatment system,
- Maintenance access,
- Proposed drainage easement and public right of way (ROW),
- Overflow device, and
- Boundaries of drainage easement.
2. Plan details (1" = 30' or larger) for the bioretention cell showing:
Basin dimensions
Pretreatment system,
Maintenance access,
Outlet structure,
- Overflow device,
Flow distribution detail for basin inflow, and
Vegetation specifications.
,j
N Y N f Z 3. Section view of the dry detention basin (1" = 20' or larger) showing:
Side slopes, 3:1 or lower,
Pretreatment and treatment areas, and
Inlet and outlet structures.
1-2- 6. A construction sequence that shows how the dry detention basin will be protected from sediment until the
entire drainage area is stabilized.
1 G°' 7. The supporting calculations.
8. A copy of the signed and notarized operation and maintenance (O&M) agreement.
9. A copy of the deed restrictions (if required).
10. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. County
soil maps are not an acceptable source of soils information.
Form SW401-Dry Extended Detention Basin-Rev.2 Part 111. Required Items Checklist, Page 2 of 2
Ak6k R
?'J.ArFT:
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT
This form must be completely filled out, printed and submitted.
DO NOT FORGET TO ATTACH THE REQUIRED ITEMS CHECKLIST AND ALL REQUIRED ITEMS (NEXT WORKSHEET)!
I. PROJECT INFORMATION
Project name Trenton Road Subdivision
Contact name Todd Preuninger
Phone number 919-469-3340
Date March 14, 2008
Drainage area number FES 30
II. DESIGN INFORMATION
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
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 grassed bioretention cell?
To a mulched bioretention cell?
To a wetland?
To a filter strip or riparian buffer?
Other (specify)
Filter Strip or Riparian Buffer Characterization (if applicable)
Width of grass
Width of dense ground cover
Width of wooded vegetation
Total width
Elevation at downslope base of level lip
Elevation at top of bank of the receiving water
Slope (from level lip to to top of bank)
Are any draws present?
Level Spreader Design
Forebay surface area
Feet of level lip needed per cfs
Answer "Y" to one of the following:
Length based on the 1 in/hr storm?
Length based on the 10-yr storm?
Length based on the BMP discharge rate?
Design flow
Is a bypass device provided?
39,640.00 ffz
21,344.00 ftz
514 %
0.57
0 5 f4 cfs
min
7.22 in/hr
3-.14 5 cfs
N (Y or N)
N (Y or N)
N (Y or N)
Y (Y or N) Complete filter strip characterization below.
0.00 ft
0.00 ft
65.00 ft
65.00 ft
322.00 fmsl
318.10 fmsl
6.00 %
N (Y or N)
99 sgft
65 ft/cfs
Y (Y or N)
N (Y or N)
N (Y or N)
0.52 cfs
Y (Y or N)
OK
OK
OK
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.4 Parts I. and II. Design Summary, page 1 of 3
Length of the level lip
Are level spreaders in series?
Bypass Channel Design (if applicable)
Does the bypass discharge through a wetland?
Does the channel enter the stream at an angle?
Dimensions of the channel (see diagram below):
M
B
W
y
Peak velocity in the channel during the 10-yr storm
Channel lining material

M
Level spreader length OK.
34.00 ft
N (Y or N)
N (Y or N)
Y (Y or N)
3.00 ft
0.00 ft
6.00 ft
1.00 ft
2.53 cfs

1
._ -;
M

Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.4 Parts I. and II. Design Summary, page 2 of 3
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.
Pagel Plan
Ini ials 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,
Proposed 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,
Proposed 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. A construction sequence that shows how the level spreader will be protected from sediment until the entire
drainage area is stabilized.
_ 6. The supporting calculations.
J 7. A copy of the signed and notarized operation and maintenance (0&M) agreement.
8. A copy of the deed restrictions (if required).
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.4 Part III, page 3 of 3

DUJOC'
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT
This form must be completely filled out, printed and submitted.
DO NOT FORGET TO ATTACH THE REQUIRED ITEMS CHECKLIST AND ALL REQUIRED ITEMS (NEXT WORKSHEET)!
I. PROJECT INFORMATION
Project name Trenton Road Subdivision
Contact name Todd Preuninger
Phone number 919-469-3340
Date March 14, 2008
Drainage area number FES 40
IL DESIGN INFORMATION
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 28,750.00 ftz
Impervious surface area 13,068 00 ft2
Percent impervious L15 %
Rational C coefficient 0.38
Peak flow from the 1 in/hr storm 0.'2 5 I cfs
Time of concentration min
Rainfall intensity, 10-yr storm 7.22 in/hr
Peak flow from the 10-yr storm I - S i t cfs
Where Does the Level Spreader Discharge?
To a grassed bioretention cell? N (Y or N)
To a mulched bioretention cell? N (Y or N)
To a wetland? N (Y or N)
To a filter strip or riparian buffer? Y (Y or N) Complete filter strip characterization below.
Other (specify)
Filter Strip or Riparian Buffer Characterization (if applicable)
Width of grass 0,00 ft
Width of dense ground cover 0 00 ft
Width of wooded vegetation 60.00 ft
Total width 60.00 ft
Elevation at downslope base of level lip 313.00 fmsl
Elevation at top of bank of the receiving water 309.50 fmsl
Slope (from level lip to to top of bank) 5.83 % OK
Are any draws present? N (Y or N) OK
Level Spreader Design
Forebay surface area 3 6 sq ft
Feet of level lip needed per cfs 65 ft/cfs
Answer "Y" to one of the following:
Length based on the 1 in/hr storm? Y (Y or N)
Length based on the 10-yr storm? N (Y or N)
Length based on the BMP discharge rate? N (Y or N)
Design flow 0.25 cfs
Is a bypass device provided? Y (Y or N) OK
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.4 Parts I. and II. Design Summary, page 1 of 3
Length of the level lip
Are level spreaders in series?
Bypass Channel Design (if applicable)
Does the bypass discharge through a wetland?
Does the channel enter the stream at an angle?
Dimensions of the channel (see diagram below):
M
B
W
y
Peak velocity in the channel during the 10-yr storm
Channel lining material

17.00 ft Level spreader length OK.
N (Y or N)
N (Y or N)
Y (Y or N)
3.00 ft
0.00 ft
6.00 ft
1.00 ft
2.09 cfs

-------------
M
i B i
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.4

M
Parts I. and II. Design Summary, page 2 of 3
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.
Pagel Plan
Initials 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,
- Proposed 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,
- Proposed 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. A construction sequence that shows how the level spreader will be protected from sediment until the entire
drainage area is stabilized.
6. The supporting calculations.
7. A copy of the signed and notarized operation and maintenance (0&M) agreement.
8. A copy of the deed restrictions (if required).
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.4 Part Ifl, page 3 of 3
NCDENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT
This form must be completely filled out, printed and submitted.
DO NOT FORGET TO ATTACH THE REQUIRED ITEMS CHECKLIST AND ALL REQUIRED ITEMS (NEXT WORKSHEET)I
I. PROJECT INFORMATION
Project name Trenton Foad Subdivision
Contact name Todd Preuninger
Phone number 919-469-3340
Date March 14, 2008
Drainage area number BMP #1 LS
IL DESIGN INFORMATION
For Level Spreaders Receiving Flow From a BMP
Type of BMP Dry Detention Basin
Drawdown flow from the BMP 0.06 cfs
For Level Spreaders Receiving Flow from the Drainage Area Do not complete this section of the worksheet.
Drainage area ft2 Do not complete this section of the worksheet.
Impervious surface area ft2 Do not complete this section of the worksheet.
Percent impervious % Do not complete this section of the worksheet.
Rational C coefficient Do not complete this section of the worksheet.
Peak flow from the 1 in/hr storm cfs Do not complete this section of the worksheet.
Time of concentration min Do not complete this section of the worksheet.
Rainfall intensity, 10-yr storm in/hr Do not complete this section of the worksheet.
Peak flow from the 10-yr storm cfs Do not complete this section of the worksheet.
Where Does the Level Spreader Discharge ?
To a grassed bioretention cell? N (Y or N)
To a mulched bioretention cell? N (Y or N)
To a wetland? N' (Y or N)
To a filter strip or riparian buffer? Y (Y or N) Complete filter strip characterization below.
Other (specify)
Filter Strip or Riparian Buffer Characterization (if applicable)
Width of grass 0.00 ft
Width of dense ground cover 0.00 ft
Width of wooded vegetation 75.00 ft
Total width 75.00 ft
Elevation at downslope base of level lip 339.50 fmsl
Elevation at top of bank of the receiving water 335.00 fmsl
Slope (from level lip to to top of bank) 6.00 % OK
Are any draws present? N (Y or N) OK
Level Spreader Design
Forebay surface area sq ft No forebay is needed.
Feet of level lip needed per cfs 65 ft/cfs
Answer "Y" to one of the following:
Length based on the 1 in/hr storm? N (Y or N)
Length based on the 10-yr storm? N (Y or N)
Length based on the BMP discharge rate? Y (Y or N)
Design flow 0.06 cfs
Is a bypass device provided? Y (Y or N) OK
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.4 Parts I. and II. Design Summary, page 1 of 3
Length of the level lip
Are level spreaders in series?
Bypass Channel Design (if applicable)
Does the bypass discharge through a wetland?
Does the channel enter the stream at an angle?
Dimensions of the channel (see diagram below):
M
B
W
y
Peak velocity in the channel during the 10-yr storm
Channel lining material

t •--------
M
13.00 ft Level spreader length OK.
N (Y or N)
(Y or N)
(Y or N)
?ft
ft
ft
ft
cfs
i
1
B

M
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.4 Parts I. and II. Design Summary, page 2 of 3
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.
Pagel Plan
Initials 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,
Proposed 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,
- Proposed drainage easement, and
- Design at ultimate build-out.
w? 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. A construction sequence that shows how the level spreader will be protected from sediment until the entire
drainage area is stabilized.
w,l 6. The supporting calculations.
7. A copy of the signed and notarized operation and maintenance (0&M) agreement.
8. A copy of the deed restrictions (if required).
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.4 Part III, page 3 of 3
Worksheet for Triangular Channel - FES 30
Project Description
Friction Method Manning Formula
Solve For Normal Depth
Input Data
Roughness Coefficient 0.069
Channel Slope 6.00 %
Left Side Slope 3.00 ft/ft (H:V)
Right Side Slope 3.00 ft/ft (H:V)
Discharge 3.74 ft3/s
Results
Normal Depth 0.70 ft
Flow Area 1.48 ft?
Wetted Perimeter 4.44 ft
Top Width 4.21 ft
Critical Depth 0.63 ft
Critical Slope 0.10958 ft/ft
Velocity 2.53 ft/s
Velocity Head 0.10 ft
Specific Energy 0.80 ft
Froude Number 0.75
Flow Type Subcritical
GVF Input Data
Downstream Depth 0.00 ft
Length 0.00 ft
Number Of Steps 0
GVF Output Data
Upstream Depth 0.00 ft
Profile Description
Profile Headloss 0.00 ft
Downstream Velocity Infinity ft/s
Upstream Velocity Infinity ff/s
Normal Depth 0.70 ft
Critical Depth 0.63 ft
Channel Slope 6.00 %
Critical Slope 0.10958 ft/ft
Bentley Systems, Inc. Haestad Methods Solution Center FlowMaster (08.01.058.00]
3/12/2008 10:06:46 AM 27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA [phone] Page 1 of 1
Worksheet for Trianqular Channel - FES 40
Project Description
Friction Method Manning Formula
Solve For Normal Depth
Input Data
Roughness Coefficient 0.069
Channel Slope 5.83 %
Left Side Slope 3.00 ft/ft (H:V)
Right Side Slope 3.00 ft/ft (H:V)
Discharge 1.81 ft'/s
Results
Normal Depth 0.54 ft
Flow Area 0.87 ft2
Wetted Perimeter 3.40 ft
Top Width 3.22 ft
Critical Depth 0.47 ft
Critical Slope 0.12071 ft/ft
Velocity 2.09 ft/s
Velocity Head 0.07 ft
Specific Energy 0.61 ft
Froude Number 0.71
Flow Type Subcritical
GVF Input Data
Downstream Depth 0.00 ft
Length 0.00 ft
Number Of Steps 0
GVF Output Data
Upstream Depth 0.00 ft
Profile Description
Profile Headloss 0.00 ft
Downstream Velocity Infinity ft/s
Upstream Velocity Infinity ft/s
Normal Depth 0.54 ft
Critical Depth 0.47 ft
Channel Slope 5.83 %
Critical Slope 0.12071 ft/ft
Bentley Systems, Inc. Haestad Methods Solution Center FlowMaster [08.01.058.00]
3/12/2008 10:06:57 AM 27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA [phone] Page 1 of 1

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1.
34' LEVEL SPREADER LOCATION @ FES 30
TRENTON ROAD
RALEIGH, NORTH CAROLINA
i FIGURE #
WITHERS ?_ RAVENEfL
ENGINEERS I PLANNERS I SURVEYORS 1
1 I 1 MacKenan Drive, Cary, North Carolina 27511 DATE:
tel: [phone] : fax: [phone]/2008
www.withersravenel.com
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17' LEVEL SPREADER LOCATION @ FES 40
TRENTON ROAD
RALEIGH, NORTH CAROLINA
FIGURE #
WITHERS RAVENEL
ENGINEERS I PLANNERS I SURVEYORS 2
111 MacKenan Drive, Cary, North Carolina 27511 DATE:
tel: [phone] : fax: [phone]/2008
www.withersravenel.com

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13' LEVEL SPREADER LOCATION @ BMP #1
TRENTON ROAD
RALEIGH, NORTH CAROLINA
FIGURE #
WITHERS RAVENEL
ENGINEERS PLANNERS I SURVEYORS 3
111 MacKenan Drive, Cary, North Carolina 27511 DATE:
tel: [phone] : fax: [phone]
3/14/2008
www.withersravenel.com
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