20060700 Ver 1_401 Application_20060424

Kimley-Horn
and Associates, Inc.
April 24, 2006
Mrs. Nikki Thomson
Division of Water Quality
Wetlands Unit 06 (P700
1650 Mail Service Center,
Raleigh, NC 27699-1650
Re: Tryon Road Widening, Part D - City of Raleigh
401 Water Quality Certification
Raleigh, Wake County, North Carolina
Dear Mrs. Thomson:
On behalf of our client, City of Raleigh, Kimley-Horn and Associated, Inc. is
applying for a 401 Water Quality Certification as part of a Nationwide 14 for the
proposed widening of Tryon Road. The project plans to widen Tryon Road from
Campbell Road to Dillard Drive from a two-lane road to a four-lane road with a
median. Current and future traffic volumes require that the road be widen. The
project is located adjacent to an unnamed tributary to Swift Creek.
Impacts include the extension of one existing culvert along with buffer impacts
from the road widening. The first stream impact is 82 linear feet of an UT of
Swift Creek and the second impact is 185 linear feet of an UT of Swift Creek.
Neuse River buffers will be impacted in two separate locations. One of the
impacts is associated with lengthening the culvert. The second impact is from a
fill slope which encroaches into zone 1 and 2 and causes the need for natural
channel design. A total of 15,860 square feet of zone 1 and 3,538 square feet of
zone 2 buffer is proposed for impact. Mitigation for impacts to zone 1 is
proposed through payment into the Wetland Restoration Fund.
Stormwater best management practices are proposed to treat all new impervious
surface (See attach stormwater plans).
If you have any questions, please call me at [phone]. Thank you for your
attention to this matter.
Very truly yours,
KIMLEY-HORN AND ASSOCIATES, INC.
9-1- --__
Jason Pace
¦
TEL [phone]
FAX [phone]
¦
P.O. Box 33068
Raleigh, North Carolina
27636.3068
Kimley-Horn
? ? and Associates, Inc,
Transmittal
F@RRIFRI
APR 2 4 2006
DENR - WATER QUALITY
WETLANDS AND STORMWATER BRANCH
P.O. Box 33068
Raleigh, North Carolina
27636-3068
TEL [phone]
FAX [phone]
Date: April 24, 2006 Job Number: 011063042
Project Name: Tryon Road Widening, Part D
To: NikkiThomson
DOT Project Coordinator
Division of Water Quality / 401 Wetlands Unit
1650 Mail Service Center
Raleigh, North Carolina 27699-1650
We are sending these by
? U.S. Mail ? FedEx ® Hand Delivery
? Other
We are sending you
® Attached ? Under separate cover via the following items:
? Shop drawings ? Prints/Plans ? Samples ? Specifications ? Change Orders
? Other
Copies Date No. Description
7 4/24/06 PCN Application form and supporting documents
7 4/24/06 Roadway/Drainage Plans
These are transmitted as checked below:
? For your use ? Approved as submitted ? Resubmit ? Copies for approval
? As requested ? Approved as noted ? Submit ? Copies for distribution
® For review and comment ? Returned for corrections ? Return ? Corrected prints
Remarks:
Copy to: Signed: Todd St. John
f ?
w
Office Use Only: Form Version March 05
USACE Action ID No. DWQ No. 2 0 0 6 0 7 0 0
(it any particular item is not applicable to this project, please enter "Not Applicable" or "N/A".)
1. Processing
1. Check all of the approval(s) requested for this project:
® Section 404 Permit ® 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: Nationwide 14
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: `P'
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 Man a ea of
Environmental Concern (seethe top of page 2 for further detai s , i D
H. Applicant Information APR 2 4 2005
1. Owner/Applicant Information DeNk - yYAr ``°-R OVAUrY
WEnAND5AND 5TOi?MAT[R BRANCH
Name: City of Raleigh
Mailing Address: Public Works Department
222 West Hargett St
PO Box 590
Raleigh, NC 27602
Telephone Number: [phone] Fax Number:
E-mail Address: Tim. Sudano(cr_,ci.raleigh.nc.us
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: Norton Webster
Company Affiliation: Kimley-Horn and Associates, Inc.
Mailing Address: PO Box 33068
Raleigh, NC 27636
Telephone Number: [phone] Fax Number: [phone]
E-mail Address: Norton.Webster(@kimley-hom.com
Page 5ofl3 0 `
6
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: Tryon Road Widening, Part D
2. T.I.P. Project Number or State Project Number (NCDOT Only):
3. Property Identification Number (Tax PIN): Several Parcels
4. Location
County: Wake Nearest Town: City of Raleigh
Subdivision name (include phase/lot number):
Directions to site (include road numbers/names, landmarks, etc.): Widening of Tryon Road
from Campbell Road to Dillard Drive
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° 44'40.6 ON 78° 43'31.6" °W
*See Figure 1 attached
6. Property size (acres): 738,200 sq. ft
7. Name of nearest receiving body of water: Unnamed Tributary to Swift Creek Z's,y 1/4", 4, ?
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 httn://h2o.enr.state.nc.us/admin/mavs/.)
9. Describe the existing conditions on the site and general land use in the vicinity of the project
at the time of this application: Forested with residential development and utility rit-of-
ways
Page 6 of 13

10. Describe the overall project in detail, including the type of equipment to be used: The
proposed project is the widening of Tryon Road. The equipment used will be the type
ically used during road construction.
11. Explain the purpose of the proposed work: Widen Tryon Road from Campbell Road to
Dillard Drive to alleviate traffic problems.
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. Both the Town of Cary and the City of Raleigh have been widening
Tryon Road for the past few years. Tryon Road Part D is one of the last sections to be widened
and is a separate project from all other past Tryon Road Widening projects.
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 more work is 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.
Page 7 of 13
1. Provide a written description of the proposed impacts: The impacts are from widening
of the existing road. One culvert on one perennial stream will be lengthened along with
buffer impacts from road widening. No wetlands are proposed to be impacted.
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,
s arately list impacts due to both structure and flooding.
Wetland Impact
Site Number
(indicate on map)
Type of Impact Type of Wetland
(e.g., forested, marsh,
herbaceous, bog, etc.) Located within
100-year
Floodplain
es/no Distance to
Nearest
Stream
linear feet Area of
Impact
(acres)
None

Total Wetland Impact (acres)
3. List the total acreage (estimated) of all existing wetlands on the property: None
4. Individually list all intermittent and perennial stream impacts. Be sure to identify temporary
impacts. Stream impacts include, but are not limited to placement of fill or culverts, dam
construction, flooding, relocation, stabilization activities (e.g., cement walls, rip-rap, crib
walls, gabions, etc.), excavation, ditching/straightening, etc. If stream relocation is proposed,
plans and profiles showing the linear footprint for both the original and relocated streams
must be included. To calculate acreage, multiply length X width, then divide by 43,560.
Stream Impact
Number
indicate on ma
Stream Name
Type of Impact
Intermittent?
. Average
Stream Width
Before Impact Impact
Length
linear feet Area of
Impact
acres
1 Culvert Perennial 82 0.25
2 Natural Channel Design Perennial 185* 0.19

Total Stream Impact (by length and acreage) 267 0.44
* Relocated length is 181'.
5. Individually list all open water impacts (including lakes, ponds, estuaries, sounds, Atlantic
Ocean and any other water of the U.S.). Open water impacts include, but are not limited to
fill. excavation, dredging, flooding, drainage, bulkheads, etc.
Open Water Impact Name of Waterbody Type of Waterbody Area of
Site Number (if applicable) Type of Impact (lake, pond, estuary, sound, bay, Impact
indicate on ma ocean, etc. acres
Page 8 of 13
Total Open Water Impact (acres)
6. List the cumulative impact to all Waters of the U.S. resulting from the project:
Stream Impact (acres): 0.44
Wetland Impact (acres):
Open Water Impact (acres):
Total Impact to Waters of the U.S. (acres)
Total Stream Impact (linear feet): 267
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.
N/A
8. Pond Creation
If construction of a pond is proposed, associated wetland and stream impacts should be
included above in the wetland and stream impact sections. Also, the proposed pond should
be described here and illustrated on any maps included with this application.
Pond to be created in (check all that apply): ? uplands ? stream ? wetlands
Describe the method of construction (e.g., dam/.embankment, excavation, installation of
draw-down valve or spillway, etc.):
Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond,
local stormwater requirement, etc.):
Current land use in the vicinity of the pond:
Size of watershed draining to pond: Expected pond surface area:
VII. Impact Justification (Avoidance and Minimization)
Specifically describe measures taken to avoid the proposed impacts. It may be useful to provide
information related to site constraints such as topography, building ordinances, accessibility, and
financial viability of the project. The applicant may attach drawings of alternative, lower-impact
site layouts, and explain why these design options were not feasible. Also discuss how impacts
were minimized once the desired site plan was developed. If applicable, discuss construction
techniques to be followed during construction to reduce impacts.
All practical measures have been taken to avoid and minimize impacts to the streams,
wetlands and buffers. Topographic constraints have limited the locations for some impacts.
Page 9 of 13
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
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
bqp://h2o.enr.state.nc.us/ncwetlands/stringide.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.
No stream mitigation is proposed. Since the relocated stream will be relocated using natural
channel design techniques that meet the definition of restoration including re-establishing 50
ft of forested buffers. Buffer mitigation is proposed through payment into the Wetland
Restoration fund.
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 hM://h2o.enr.state.nc.us/M/index.htm. If use of the NCEEP is proposed, please
check the appropriate box on page five and provide the following information:
Page 10 of 13
Amount of stream mitigation requested (linear feet): N/A
Amount of buffer mitigation requested (square feet): 267
Amount of Riparian wetland mitigation requested (acres): N/A
Amount of Non-riparian wetland mitigation requested (acres): N/A
Amount of Coastal wetland mitigation requested (acres): N/A
IX.
X.
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 El
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 ?
Proposed Impacts on Riparian and Watershed Buffers (required by DWQ)
It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to
required state and local buffers associated with the project. The applicant must also provide
justification for these impacts in Section VII above. All proposed impacts must be listed herein,
and must be clearly identifiable on the accompanying site plan. All buffers must be shown on a
map, whether or not impacts are proposed to the buffers. Correspondence from the DWQ
Regional Office may be included as appropriate. Photographs may also be included at the
applicant's discretion.
1. Will the project impact protected riparian buffers identified within 15A NCAC 2B .0233
(Meuse), 15A NCAC 2B .0259 (Tar-Pamlico), 15A NCAC 02B .0243 (Catawba) 15A NCAC
2B .0250 (Randleman Rules and Water Supply Buffer Requirements), or other (please
identify )? 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 multivliers. Required
Zone* Impact
(square feet Multiplier
Mitigation
1 15860 3 (2 for Catawba) 24282
2 3538 1.5 839
Total 19398 25121
* 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.
Page 11 of 13
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 2B .0242 or.0244, or.0260.
Payment into the Wetland Restoration Fund
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. All new impervious surface is being treated. (See storrawater management
plans.) Storm water runoff from "new" impervious surfaces will be discharged as diffuse flow
through buffers or treated for nitrogen removal.
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.
N/A
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:
The purpose of this project is to relieve traffic congestion along Tryon Road. As such the
widening will only address existing issue and should not result in additional development.
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).
Page 12 of 13

04120/2006 09:04
919-390-3232
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PROJECT NOTEBOOK
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DRAINAGE NOTEBOOK
PROJECT NUMBER: PW 2005-9
PROJECT DESCRIPTION: FROM CAMPBELL ROAD TO DILLARD DRIVE
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WAKE COUNTY, NORTH CAROLINA
PREPARED FOR:
CITY OF RALEIGH
COMPLETED: 04/17/06
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Worksheet for -L- 26+65 TO 27+65 RT
Project Description n
Flow Element: Triangular Channel
Friction Method: Manning Formula
Solve For: Normal Depth
1,? z
Input Data r LL
,
Roughness Coefficient: 0.030
Channel Slope: 0.02300 ft/ft
Left Side Slope: 2.00 ft/ft (H:V)
Right Side Slope: 2.00 ft/ft (H:V)
Discharge: 2.00 ft3/s
Results
Normal Depth: 0.57 ft
Flow Area: 0.66 ft2
Wetted Perimeter. 2.57 ft
Top Width: 2.30 ft
Critical Depth: 0.57 ft
Critical Slope: 0.02308 ft/ft
Velocity: 3.03 ft/s
Velocity Head: 0.14 ft
Specific Energy: 0.72 ft
Froude Number. 1.00
Flow Type: Subcritical
GVF Input Data
Downstream Depth: 0.00 ft
Length: 0.00 ft
Number Of Steps: 0
,GYF,Output,Datai-r,.jg,
} ?. ,
Upstream Depth: 0.00 ft
Profile Description: N/A
Profile Headloss: 0.00 ft
Downstream Velocity: 0.00 ft/s
Upstream Velocity: 0.00 ft/s
Normal Depth: 0.57 ft
Critical Depth: 0.57 ft
Channel Slope: 0.02300 ft/ft
Critical Slope: 0.02308 ft/ft
Worksheet for -L- 28+00 TO 28+30 RT
Project Descrption s r
Flow Element: Triangular Channel
Friction Method: Manning Formula
Solve For: Normal Depth

Input Data f-
-
i 0
069
ent:
Roughness Coeffic .
Channel Slope: 0.05200 ft/ft
Left Side Slope: 2.00 ft/ft (H:V)
Right Side Slope: 2.00 ft/ft (H:V)
Discharge: 2.00 ft3/s
Results-
Normal Depth: 0.67 ft
Flow Area: 0.91 ft2
Wetted Perimeter: 3.01 ft
Top Width: 2.69 ft
Critical Depth: 0.57 ft
Critical Slope: 0.12208 ft/ft
Velocity: 2.21 ft/s
Velocity Head: 0.08 ft
Specific Energy: 0.75 ft
Froude Number. 0.67
Flow Type: Subcritical
GVFtnput Dataf f s; .. .....
Downstream Depth: 0.00 ft
Length: 0.00 ft
Number Of Steps: 0
GVF Output Data f
Upstream Depth: 0.00 ft
Profile Description: N/A
Profile Headloss: 0.00 ft
Downstream Velocity: 0.00 ft/s
Upstream Velocity: 0.00 ft/s
Normal Depth: 0.67 ft
Critical Depth: 0.57 ft
Channel Slope: 0.05200 ft/ft
Critical Slope: 0.12208 ft/ft

Worksheet for -L- 28+30 TO 29+80 RT
Project Description r
Flow Element: Triangular Channel
Friction Method: Manning Formula
Solve For. Normal Depth
Input Datal'? ^x r ?p v

Roughness Coefficient: 0.069
Channel Slope: 0.04400 ft/ft
Left Side Slope: 2.00 ft/ft (H:V)
Right Side Slope: 2.00 ft/ft (H:V)
Discharge: 2.00 ft'/s
Results _
Normal Depth:
Flow Area:
Wetted Perimeter.
Top Width:
Critical Depth:
Critical Slope:
Velocity:
Velocity Head:
Specific Energy:
Froude Number.
Flow Type:
- r ..

0.69 ft
0.97 ft2
3.11 ft
2.78 ft
0.57 ft
0.12206 ft/ft
2.07 ft/s
0.07 ft
0.76 ft
0.62
Subcritical
GVF Input Data
Downstream Depth: 0.00 ft
Length: 0.00 ft
Number Of Steps: 0
GVF Output Data -? ti-

Upstream Depth: 0.00 ft
Profile Description: N/A
Profile Headloss: 0.00 ft
Downstream Velocity: 0.00 ft/s
Upstream Velocity: 0.00 ft/s
Normal Depth: 0.69 ft
Critical Depth: 0.57 ft
Channel Slope: 0.04400 ft/ft
Critical Slope: 0.12206 ft/ft

1
Worksheet for -L- 52+00 TO 52+56 LT
Project Descniptions?- °
?. _ ? ? ?., ., ..? , ,_ - ? ?.rh•:->_..? ..?..,?_ , _.? is ? .- _. ? .
Flow Element: Triangular Channel
Friction Method: Manning Formula
Solve For: Normal Depth
Input Data
Roughness Coefficient: 0.069
Channel Slope: 0.09000 ft/ft
Left Side Slope: 2.00 ft/ft (H:V)
Right Side Slope: 2.00 ft/ft (H:V)
Discharge: 1.00 ft /s
Results
Normal Depth: 0.47 ft
Flow Area: 0.44 ft2
Wetted Perimeter: 2.09 ft
Top Width: 1.87 ft
Critical Depth: 0.43 ft
Critical Slope: 0.13389 ft/ft
Velocity: 2.28 ft/s
Velocity Head: 0.08 ft
Specific Energy: 0.55 ft
Froude Number: 0.83
Flow Type: Subcritical
GVF input batary•
Downstream Depth: 0.00 ft
Length: 0.00 ft
Number Of Steps: 0
GVF Output Data '`'
Upstream Depth: 0.00
Profile Description: N/A
Profile Headloss: 0.00
Downstream Velocity: 0.00
Upstream Velocity: 0.00
Normal Depth: 0.47
Critical Depth: 0.43
Channel Slope: 0.09000
Critical Slope: 0.13389
ft
ft
ft/s
ft/s
ft
ft
ft/ft
ft/ft

Worksheet for -L- 53+78 TO 55+50 RT
Project Description 4 t
_ e
Flow Element: Triangular Channel
Friction Method: Manning Formula
Solve For: Normal Depth
Input Data If f - 5

Roughness Coefficient: 0.069
Channel Slope: 0.05000 ft/ft
Left Side Slope: 2.00 ft/ft (H:V)
Right Side Slope: 2.00 ft/ft (H:V)
Discharge: 14.70 ft'/s
results
Normal Depth: 1.43 ft
Flow Area: 4.11 ft2
Wetted Perimeter: 6.41 ft
Top Width: 5.73 ft
Critical Depth: 1.27 ft
Critical Slope: 0.09356 ft/ft
Velocity: 3.58 ft/s
Velocity Head: 0.20 ft
Specific Energy: 1.63 ft
Froude Number. 0.75
Flow Type: Subcritical
GVF Input Data „ r
? _
__. - -
.
Downstream Depth: 0.00 ft
Length: 0.00 ft
Number Of Steps: 0
GVF
Output Da'ta'
,
Upstream Depth: 0.00 ft
Profile Description: N/A
Profile Headloss: 0.00 ft
Downstream Velocity: 0.00 ft/s
Upstream Velocity: 0.00 ft/s
Normal Depth: 1.43 ft
Critical Depth: 1.27 ft
Channel Slope: 0.05000 ft/ft
Critical Slope: 0.09356 ft/ft
0
rt
3
?D

DWQ Project
DIVISION OF WATER QUALITY - LEVEL SPREADER WORKSHEET
1. PROJECT INFORMATION (please complete the following information):
Project Name : Tryon Road Widening, Part D
Contact Person: Jason Pace - Kimley Horn Phone Number: ( 919 ) 677-2135
Level Spreader ID: -L- 56+15 RT
Level Spreader Length
Drainage Area
Impervious Area
Maximum Filter Strip/Buffer Slope
grass
65 ft.
6.2 ac.
3.6 ac.
6.5 %
33 cfs
5 cfs
Thick ground cover
(perpendicular to flow)
(on-site and off-site drainage to the level spreader)
(on-site and off-site drainage to the level spreader)
(6% for forested, leaf littler cover, 8% for thick ground cover)*
(thick ground cover or grass, canopied forest with leaf litter
groundcover)
Max. Discharge from a 10 Year Storm
Max. Discharge to Level Spreader
Filter Strip/Buffer Vegetation
Pre-treatment or Bypass Method
It. REQUIRED ITEMS CHECKLIST
Bypass Method
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.
Applicants Initials
City of Raleigh Level spreader is at least 13 ft. per cfs for thick ground cover or grass or 100 ft per cfs in canopied forest with leaf
litter.
City of Raleigh Pre-Form Scour Holes are on flat slopes only
City of Raleigh No structures are located in protected buffers*
If bypass method specified in the Draft Level Spreader Design Option Document:
City of Raleigh Bypass method is specified (if applicable) and plan details and calculations are provided
City of Raleigh Discharge to level spreader and subsequent filter strip is hydraulically and spatially separate from the bypass
discharge.
City of Raleigh No structures are located in protected buffers.
City of Raleigh Plan details for the bypass and outlets are provided.
** The operation and maintenance agreement includes annual erosion and vegetation repair.
** The operation and maintenance agreement signed and notarized by the responsible party is provided.
* Level spreaders in series can be used on slopes of up to 15% in forested areas with leaf littler cover or on slopes of up to 25% in areas
with thick ground cover or grass if designed according to the Draft Level Spreader Design Option Document. This potentially requires a
minor variance in protected buffer areas. In any event the second level spreader cannot be located in Zone 1 of a protected buffer area.
** Operation and Maintenance by NCDOT
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I. PROJECT INFORMATION (please complete the following information):
Project Name : won Road Widening, Part D
Contact Person: Jason Pace - Kimley Horn Phone Number: ( 919 ) 677-2135
Level Spreader ID: -L- 58+20 RT
DIVISION OF WATER QUALITY - LEVEL SPREADER WORKSHEET
Level Spreader Length
Drainage Area
Impervious Area
Maximum Filter Strip/Buffer Slope
grass
Max. Discharge from a 10 Year Storm
Max. Discharge to Level Spreader
Filter Strip/Buffer Vegetation
Pre-treatment or Bypass Method
II. REQUIRED ITEMS CHECKLIST
45 ft.
4.2 ac.
1.6 ac.
6.5 %
19 cfs
3.4 cfs
Thick ground cover
Bypass Method
(perpendicular to flow)
(on-site and off-site drainage to the level spreader)
(on-site and off-site drainage to the level spreader)
(6% for forested, leaf littler cover, 8% for thick ground cover)*
(thick ground cover or grass, canopied forest with leaf litter
groundcover)
Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a
requirement has not been met, attach an explanation of why. At a minimum, a complete 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.
Applicants Initials
City of Raleigh Level spreader is at least 13 ft. per cfs for thick ground cover or grass or 100 ft per cfs in canopied forest with leaf
litter.
City of Raleigh Pre-Form Scour Holes are on flat slopes only
City of Raleigh No structures are located in protected buffers*
If bypass method specified in the Draft Level Spreader Design Option Document:
City of Raleigh Bypass method is specified (if applicable) and plan details and calculations are provided
City of Raleigh Discharge to level spreader and subsequent filter strip is hydraulically and spatially separate from the bypass
discharge.
City of Raleigh No structures are located in protected buffers.
City of Raleigh Plan details for the bypass and outlets are provided.
** The operation and maintenance agreement includes annual erosion and vegetation repair.

DWQ Project No.
The operation and maintenance agreement signed and notarized by the responsible party is provided.
* Level spreaders in series can be used on slopes of up to 15% in forested areas with leaf littler cover or on slopes of up to 25% in areas
with thick ground cover or grass if designed according to the Draft Level Spreader Design Option Document. This potentially requires a
minor variance in protected buffer areas. In any event the second level spreader cannot be located in Zone 1 of a protected buffer area.
** Operation and Maintenance by NCDOT
a?? Kimley-Horn
` ot?
and Associates, Inc. Sheet No. /
Job Subject Job No.
Designed by S S ?' Date Checked by Date

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