20081477 Ver 1_401 Application_20080908

Office Use Only: Form Version March 05
USACE Action ID No. DWQ No. 0 8- 1 4 7 7
(If any particular item is not applicable to this project, please enter "Not Applicable" or "N/A".)
1. Processing P
r?
1. Check all of the approval(s) requested for this project:
® Section 404 Permit ® Riparian or Watershed "Mu er 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: NWP 3, GC 3687
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), check here: ?
II. Applicant Information'
1. Owner/Applicant Information
S FP p f?' ?M
Name: City of Raleigh L`ENR UUAL!TY
Mailing Address: Public Works Department
_ 222 West Hargett Street
Raleigh, NC 27602-0590
Attn: Carl Dawson, P.E.
Telephone Number: [phone] Fax Number: [phone]
E-mail Address: [e-mail]
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: Daniel Ingram
Company Affiliation: WK Dickson
Mailing Address: 720 Corporate Center Drive
Raleigh, NC 27607
Telephone Number: 919-782-0495 Fax Number: 919-782-9672
E-mail Address: [e-mail]
Updated 11/1/2005
Page 5 of 13
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: Kaplan Drive Culvert Improvement
2. T.I.P. Project Number or State Project Number (NCDOT Only):
3. Property Identification Number (Tax PIN): 783574025 (City of Raleigh)
4. Location
County: Wake Nearest Town: Raleigh
Subdivision name (include phase/lot number):
Directions to site (include road numbers/names, landmarks, etc.): Take the Gorman Street exit
from 1-40 and proceed north at the light at the end of the ramp. Take a left onto Avent Ferry Road and
go approximately 1.5 miles west. Take a right onto Kaplan Drive and go approximately 0.5 miles to the
culvert immediately after Ravel Street.
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): 35.775 ON -78.711 °W
6. Property size (acres): 0.25 (area of disturbance)
7. Name of nearest receiving body of water: Simmons Branch
8. River Basin: Neuse River Basin (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 attached project narrative describes existing conditions.
10. Describe the overall project in detail, including the type of equipment to be used: The City of
Raleigh will improve the culvert at Kaplan Drive by installing twin 7'x7' boxes buried one foot. Both
Updated 11/1/2005
'Page 6 of 13
boxes will include weirs to maintain a concentrated flow similar to the upstream and downstream
channel dimensions and keep the culvert invert buried approximately one foot. To improve hydraulic
efficiency, reduce bank erosion, and avoid a significant sanitary sewer conflict the existing stream
channel will be re-located to the south approximately 35 feet. Equipment to be used will include typical
earthmoving equipment and construction equipment.
11. Explain the purpose of the proposed work: The project will improve channel capacity, reduce
flooding, and prevent bank erosion.
IV. Prior Project History
If jurisdictional determinations and/or permits have been requested and/or obtained for this
project (including all prior phases of the same subdivision) in the past, please explain. Include
the USACE Action ID Number, DWQ Project Number, application date, and date permits and
certifications were issued or withdrawn. Provide photocopies of previously issued permits,
certifications or other useful information. Describe previously approved wetland, stream and
buffer impacts, along with associated mitigation (where applicable). If this is a NCDOT project,
list and describe permits issued for prior segments of the same T.I.P. project, along with
construction schedules. No permits exist at this time for this project.
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.
None 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
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 new Kaplan Drive culvert will
be 5 feet longer than the existing culvert (70 feet proposed, 65 feet existing) The project will impact a
total of 126 LF of channel resulting from channel relocation (54 feet downstream and 72 feet upstream
from the existing Kaplan Drive culvert). The channel re-alignment will include 94 feet of new channel
Updated 11/1/2005
Page 7 of 13
(54 feet downstream, 40 feet upstream). The relocated channel will be constructed using natural
channel design techniques and will incorporate rock cross weirs, riffle grade controls, and natural
plantings to provide bed and bank stability. No riprap or other hardened structures will be utilized for
bed or bank protection. The proposed project will result in a net loss of 32 feet of channel.
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
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)

Total Wetland Impact (acres)
3. List the total acreage (estimated) of all existing wetlands on the property:
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 Impact (linear feet) (acres)
Downstream
1 Simmons Branch channel Perennial 10 54 0.01
relocation
U pstream
2 Simmons Branch channel Perennial 10 72 0.02
relocation
3 Simmons Branch Placement of Perennial 10 5 0
001
Culvert .
Total Stream Impact (by length and acreage) 37 0.03
Updated 11/1/2005
Page 8 of 13
5. Individually list all open water impacts (including lakes, ponds, estuaries, sounds, Atlantic
Ocean and any other water of the U.S.). Open water impacts include, but are not limited to
fill, excavation, dredging, flooding, drainage, bulkheads, etc.
Open Water Impact
Site Number
indicate on ma) Name of Waterbody

(if applicable)
Type of Impact Type of Waterbody
(lake, pond, estuary, sound, bay,
ocean, etc.) Area of
Impact
(acres)

Total Open Water Impact (acres)
6. List the cumulative impact to all Waters of the U.S. resulting from the project
Stream Impact (acres): 0.03
Wetland Impact (acres):
Open Water Impact (acres):
Total Impact to Waters of the U.S. (acres)
Total Stream Impact (linear feet): 37
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.): -
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:
Updated 11/1/2005
Page 9 of 13
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 impacts to waters of the U.S.
have been avoided and minimized to the maximum extent practicable. The attached project narrative
describes avoidance and minimization in detail. All conditions of NWP 3 will be satisfied to further
minimize impacts.
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 (see DWQ website for most current
version.).
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 off site mitigation is proposed for this project. On site mitigative measures include use of natural
channel design techniques on 94 LF of relocated portions of Simmons Branch, strict erosion control
Updated 11/1/2005
Page 10 of 13
measures, and adherence to construction BMPs. Natural channel design components include rock cross
weirs, riffle grade control structures, coir matting on stream banks, black willow live stakes, and use of a
native riparian seed mix for stabilization. No riprap or other hardened structures are proposed for bed or
bank stability. It is proposed that the relocated channel is self mitigating for the proposed impacts and
no off-site mitigation is required as cumulative impacts are 32 LF (less than 100 LF).
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://www.nceep.net/pages/inlieureplace.htm. If use of the NCEEP is proposed,
please check the appropriate box on page five and provide the following information:
Amount of stream mitigation requested (linear feet):
Amount of buffer mitigation requested (square feet):
Amount of Riparian wetland mitigation requested (acres):
Amount of Non-riparian wetland mitigation requested (acres):
Amount of Coastal wetland mitigation requested (acres):
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 ?
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.
Updated 11/1/2005
Page 11 of 13
Will the project impact
(Meuse), 15A NCAC 2B
2B .0250 (Randleman
identify) Neuse
protected riparian buffers identified within 15A NCAC 2B .0233
.0259 (Tar-Pamlico), 15A NCAC 02B .0243 (Catawba) 15A NCAC
rules and Water Supply Buffer Requirements), or other? (please
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* (s uImpct are feet) Multiplier
Required
Mitigation
1 5,797 3 (2 for Catawba)
2 362 1.5
Total 6,159
*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 2B .0242 or .0244, or .0260. The proposed project area has an existing
use of residential lawn and maintained riaht-of-wav. No forested riparian buffer will be
disturbed as a result of the proposed project. All disturbed riparian areas will be re-vegetated
with appropriate native species (stream banks) and grassed stabilization (lawn and right-
way . The proposed project is maintenance of a road crossing and disturbs a buffer with an
existing use; as such no buffer mitigation is proposed.
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 proposed project does not require stormwater planning per DWQ guidance.
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.
NA
XIII. Violations (required by DWQ)
Is this site in violation of DWQ Wetland Rules (15A NCAC 2H.0500) or any Buffer Rules?
Yes ? No
Updated 11/1/2005
Page 12 of 13
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 M
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
project is maintenance upgrades of an existing culvert to reduce flooding. The surrounding watershed is
almost entirely developed and the project should have no impact on future land use.
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).
g/11/oe
Applicant/Agent's Signature
(Agent's signature is valid only if an a
O g8 ' Date
rizati letter from the applicant is provided.)
Updated 11/1/2005
Page 13 of 13
PRE-CONSTRUCTION NOTIFICATION
NATIONWIDE PERMIT 3
PROPOSED KAPLAN DRIVE CULVERT IMPROVEMENTS
SIMMONS BRANCH DRAINAGE BASIN
WAKE COUNTY, NORTH CAROLINA
PROJECT NARRATIVE
Intrndurtinn
The Kaplan Drive culvert upgrade is part of a watershed wide plan for Simmons Branch to
reduce roadway and structure flooding in a predominantly residential neighborhood in
West Raleigh. Kaplan Drive currently overtops during the 2-year 24-hour storm event
based on built out land use conditions. The proposed upgrade discussed in this PCN is
designed to convey the 10-year 24-hour storm based on future land use conditions, as
described in the 2002 "Simmons Branch Drainage Study." The Kaplan Drive culvert
upgrade described herein in addition to the proposed White Oak Lake improvements and
other proposed culvert improvements within the Simmons Branch watershed will
substantially reduce the flood risk throughout the area especially during more frequent
storm, events. Completion of this project would affect areas under U.S. Army Corps of
Engineers (USACE) jurisdiction, specifically 126 LF of stream for culvert replacement,
stream relocation, and culvert outlet and inlet protection. These are unavoidable and
required to provide channel stability and hydraulic function. The proposed project will
include 94 LF of relocated channel built with natural channel design techniques. The total
channel loss will be 32 LF.
Site Location and Description
Simmons Branch drains approximately 1.2 mil from Western Boulevard to south of Avent
Ferry Road (Figure 1). The stream discharges to Walnut Creek just south of Lake Johnson.
While commercial areas in the vicinity of Western Boulevard have developed in recent
years, the majority of land use along Kaplan Drive is residential. Rain events in 2001
caused significant residential flooding in the watershed precipitating the "Simmons Branch
Drainage Study", completed in 2002. Recommended project locations from the 2002
study are intended to provide a 10-year level of service at major roadway crossings
assuming built out conditions in the watershed.
The existing culvert crossing at Kaplan Drive consists of 65 LF of twin 54" reinforced
concrete pipe. The headwalls on each side are block walls with 45 degree wing walls.
The culvert currently overtops during the 2-year 24-hour storm event. One residence
located downstream of the culvert experiences flooding during the 10-year 24-hour storm
event based on model results. Design constraints for the Kaplan Drive culvert crossing
include large trees upstream and downstream of the culvert along the channel banks, a
sanitary sewer conflict, and a pedestrian bridge located upstream of Kaplan Drive. The
latitude and longitude coordinates are 35.775N -78.711 W.
Proposed Culvert Improvements in the Simmon's Branch Drainage Basin Page 2
The topography on the property consists of moderately sloping terrain. Simmons Branch
flows from west to east through the middle of the project area. The project area generally
drains to the south, away from Kaplan Drive, eventually draining into Walnut Creek. The
site is located in the Neuse river basin (HUC 03020201).
jurisdictional Waters/Wetlands of the U.S.
One perennial stream is located in the central portion of the project area (Simmons
Branch). This stream is a tributary to Walnut Creek. The channel is typically ten feet wide.
No wetlands are present in the project area. Simmons Branch is a disturbed urban stream
with steep/vertical banks and many areas of active bank erosion. The riparian buffer is
mostly maintained lawn, right-of-way, or disturbed forest (Figure 2). The stream bed is
gravel with riffle-pool habitat present. No fish or benthic organisms were observed in the
channel at the time of the site visit.
Avoidance and Minimization
Due to stream location, access considerations, and project requirements, impacts to
streams are unavoidable. The proposed culvert is being relocated south of the existing
culvert to avoid a sanitary sewer conflict, protect several large trees downstream of the
culvert, and to provide a more efficient entrance to the culvert which will result in a more
stable channel bank. Avoiding the sanitary sewer conflict will reduce Neuse Buffer
impacts and reduce the overall limits of disturbance. Stabilizing the left bank upstream of
the culvert will protect the roadway embankment and reduce sediment loads to the stream.
The proposed culvert is 5 feet longer than the existing culvert (70 feet proposed, 65 feet
existing) minimizing impacts from the relocation of the existing culvert. Because of the
culvert relocation, the stream will need to be realigned immediately upstream and
downstream of the culvert. The total stream impacts for the realignment are 126 feet with
a proposed length estimated at 94 LF after the stream has been relocated. The cumulative
channel loss is 32 LF. The existing channel will be plugged as it connects into the
proposed channel on the upstream and downstream ends. The culvert will be baffled and
will be buried a foot with a scour pool forming naturally at a riffle grade control structure.
The roadway width and fill slopes have been minimized while still fulfilling geometry and
traffic considerations. Stream disturbance width will be minimized and all conditions of
NWP 3 and GC 3687 will be complied with.
The final site plan is the most practicable configuration in that it allows a usable yield of
land area while carefully configuring and placing infrastructure, utility lines, and roads to
minimize stream impact. Relocating the culvert will reduce stress on the upstream
channel bank, avoid sanitary sewer relocations, and preserve several large-sized trees on
the downstream end.
jurisdictional Impacts
The total area of jurisdictional waters of the U.S. to be impacted by the proposed culvert
upgrade project is 0.03 acres of stream fill.
Proposed Culvert Improvements in the Simmon's Branch Drainage Basin
Page 3
The stream fill is generated by a road crossing necessary to access the site. The impact is
required due to geometry constraints for the culvert upgrade accessing the Kaplan Drive
ROW and is located adjacent to the stream fill.
Best Management Practices
Prior to the beginning of any construction activities, the applicant will implement Best
Management Practices (BMP's) to minimize erosion and migration of sediments into
affected waterways (streams and wetlands) during the construction phase. A detailed
Erosion Control Plan will be developed and submitted for review and permitting by the
local jurisdiction. It will include appropriate erosion and siltation control devices placed
between the construction area and adjacent waterways. These devices may include the use
of mulches, sediment basins, silt fences, or other devices capable of preventing erosion
and migration of sediments. Monitoring of BMP's will take place in accordance with the
requirements of the North Carolina NPDES general permit for construction activity to
assure that the erosion and sediment control devices are installed properly and maintained
in a functioning condition.
Compensatory Mitigation
The proposed project impacts less than 150 LF of stream. No off site mitigation is
proposed for this project. On site mitigative measures include use of natural channel
design techniques on 94 LF of relocated portions of Simmons Branch, strict erosion control
measures, and adherence to construction BMPs. Natural channel design components
include rock cross weirs, riffle grade control structures, coir matting on stream banks, black
willow live stakes, and use of a native riparian seed mix for stabilization. No riprap or
other hardened structures are proposed for bed or bank stability. It is proposed that the
relocated channel is self mitigating for the proposed impacts and no off-site mitigation is
required as cumulative impacts are 32 LF.
Riparian and Watershed Buffers
Impacts to the riparian buffer will be minimal with only the removal of some small trees
along the stream banks and in the vicinity of the culvert upgrade. The riparian buffer has
an existing land use of maintained residential lawn and maintained right-of-way. The trees
that are removed will be replaced and the buffer replanted with appropriate native species.
The culvert upgrade at Kaplan Drive does not result in an increase in impervious surfaces.
Floodplain Encroachment
The proposed project will not encroach upon the 100-year floodplain and is not in a flood
hazard area.
Threatened and Endangered Species
Table 1 below lists threatened and endangered species in Wake County. No protected
species or suitable habitat was observed in the project area. The' proposed project is not
likely to adversely affect any protected species.
Proposed Culvert Improvements in the Simmon's Branch Drainage Basin Page 4
Table 1. Threatened and endangered saecies in oroiect area
Common Name Scientific Name Federal Status Record Status
Vertebrates
Red-cockaded woodpecker Picoides borealis Endangered Historic
Invertebrates
Dwarf wedgemussel Alasmidonta heterodon Endangered Current
Vascular Plants
Michaux's sumac Rhus michauxii Endangered Current
Cultural and Historical Resources
A database search of National Register of Historic Properties indicated no listed historic
properties in the project vicinity. Additionally, a site visit determined that no existing
structures will be impacted by the proposed project.
Personal Account Information Redacted
Y ?
f -`r ,
N
LL
U
z
w
U
N
0
W
2
cn
W
Q

C] o ? Lw]
? ? w ? ???yy s Q
W
W
®®i®®®® ^I
O
T 1? W ? ®®®o
®®®®®®® v1
®®® ®®® zo.
N
O
00
?'
E vi c o
c? 4?
Cd
?x c?a
? ' U
N z
N =
o py
w ? z
w?
? w _-
wz
w?
W W o rn
rn-
o`
o
? ono
S XUN
O m ZZn
U O w
O=^
?u p q U
O ? W WWv
Q Q O w a c c
e "? 2 ym Q.m a u o 0
y ?j X,nc?? Q O UO
\ p Q a mt C X U d :5 z
0 .2
O? ??NWfn?
N ` O O
cc°??? a 0 n O zln
y c'ctpp- a
ptV(n? {t. 1?WI LLJ O ~ 3 o
U) Of
LLI
?° \l??'??? O o mH m a o O O
Z` P °Wm`=? m V
ey" = A?=O z a ? N
°
:D ?Wrm °
m ??y' Q? ill ?'v o°m c t? a W m 9 1/ v,
t" "aZ at E m?Dc E 3 F \/ ° Q
LLI
0 Y DW? (Y (Y ? H(n
m PC2? ?a.Smw a' h a Q M` a a Q c 0
a 'a F E
0
V

X I N n I I co rn o I
W
Q J
z Q
_
W

W ? p O O

? O J
Z
Z
Z
J
z
? o ° °
?

Z
O Z
O
? Of Q J ti H U
ZZLLI Q -i O
l O
ll J ?
O W Q

U
I-
W
W
? N m F <a c
www
nP?e ygm.,.yw _ = Sr
2I?SWI11? 3L"U
VW ti e A903AONddV
"u
0
[Oq[Z ]x YUtUiM
?
g :H39 1Iaml3afo2Id A9 (13)03H0 A9 a39Yd39d .LII?i2I?d o
?11Wilmtaa an
iP0411 il
n LWH
NOSM01C
/ o; "`"d am
V P saaroxa aovmrvxa moss siu3W3n0xawi
:
' ' '
NOI1dINJ530 31Va ON evs?a ,A.,, 7S
y°PpH)Q,4D laaroucl t YIY76
9
J.1CiA
09:1 3TC76 ZapFt ON 90f ,?,(11.1L1 lll? l?ld ld
Y d

W?y s O
?AQtD yy
3
6
?U
W
ry
pr ry
W
Cp WIC
JyN
? Z
' W \J
?
RON! N
tl
? q ? P?tVf/1? q?i w
O 0. q
?
t
5!
t? W m V
10
/?
(
)
O
Gg
?
tl
? ?
Wy
SS yy
SV \ r
]
tF nq??caa j`
? o

? F nVNnwq°, ^
kt? ? £a?rya?

E

? mm
VWWCCW U
'
o c ??co
o?._m3W c
'
,
l
l I Ri C m? TN W ?
C
i
l c aOUy«N ? ? O N
?
mw
'
1 W WS
- a
N a

'd° a r, A
3 N? Of' V ?C??? 11 \ '?? t \ T.
C',L \ \ ? f 4S ?-1
a
n?
? r.
}r
4-
i
R R R A A A A 9 9 R R? n E A A A R
ga 1
°
Y
E? ?
1
?
S e ?

1

J

i?
J _

s
a
w
0
ai
sH?
w
aw
?z
Rs? ga??yygN- 0,29/ _
fa . q. ahSii
h§w

lie- i
seg. .
pose
r \ ;
i
r

aaYi
a r
,
1
I
?
'
l
t
i
i

REFS
A"2
ll p
ri
,??- ? i
`?
•
\? N x
',
'
\
,
1
1
in'??I NM?c p?6F
i

a
0
x
a
s
S
3
qtd arwe a w*z/e
USONLI ULN xAaypPOPW
LMU - 6MPW X - Le3AVb HDa We\e•q\Om\aOV3\VWMIC a\41PPVt?t^ln
a
,? ??
?MIwI M10 v T?tn ??TT
Q??Y?111V ?SLYO?
9ow/wo ARMAOllddV
Ru
y? .? I?g nx y? I?O?a AS 33NOWD A903VVd3Nd u v ??4 O
3Vq nitM3) nioum N4
quollmuoa anlalu+ro44 ?tlunwupa
? . pru 1VN
NOS>I:0 '?Yd ?°?'
AA? a?g?gl
?l laam'da 5113vNMG WHOM s
i
u
3W3AOHclWi

NOI1dINOSd0

31V0

ON

uwti-MM ?
js
I Jp40
. :)H Odd
YEN ZTVOG'JMU
f:l Fix ZIUON
'ONeOf
V9'00'stoo v
r,?
?
JL113[1.LL113 NV laVX ? W,
J
Q

m w

Q
a m
LLJ

n° ?ZY
U
o a ? U
m ,? w
co i

o<?
oUa
ox
w -g
I lo
?Um
<
m!
b?
8.

Z
b°w m
w -
?aw
Cw° ? F
' o _J

m m

dun
sm z
Q
~
O
c
o o W °?m
au °na J
O
z

a
w ? O
U

w 0 o r
lO
o
_? LLJ

w F?

o 2
Q
<
l

°
-11

mi?iN CD
LLJ
J
ly

ut
?a
z L
u\rc
?3Q U a
rc Jl°71 ?o' ?m
?u
p
Oho V ?
V4
? o
0
o N
Y

0
n
r
m?
Q
w
ckf
f
O
0
Z
Q
a
Q
Y
Cf)
Z
3
m
3
2 ? Q
H
w
a ~
w ?
LLJ
fL J
7
U
Z
Q Z
a Q
Y J
d
Q
Y

w
J
Q
U
N
Nv OL"M aoorJ 6
MS W VLM3tlLNNL?xaywq lwk
L SNVLA - 5-Pl &x - Lmim woowv\a7\Om\wvo\vwwt=9\45PPtlbl>M x.'I