20150585 Ver 2_401 Application_20150915

Dewberry 0 S �S V
I 1 II II III 1119 111 11 III I'd I I I II I III 11111 1I1 II. lit .I,. IL.I, Illil 1 II I II, I„ .6IIII .I, „I I, I1 ,i1 .11. III
Dewberry Engineers Inc
2301 Rexwoods Drive, Suite 200
Raleigh, NC 27607 -3366
919.881.9939
919.881.9923 fax
www.dewberry.com
September 16, 2015
Mr. David Schaeffer
U.S. Army Corps of Engineers
NC Division of Water Resources
1617 Mail Service Center
Raleigh, North Carolina 27699 -1650
Reference: City of Raleigh
Blenheim Culvert Repairs /Stream Relocation Sanitary Sewer Protection
WQC #3883, #3890 Application REVISED
Dewberry Project No. 5oo6oi86
Dear Mr. Shaeffer:
Enclosed is one copy of a revised Pre - Construction Notification (PCN) Permit Application Package for the
City of Raleigh Blenheim Culvert Repairs /Stream Relocation Sanitary Sewer Protection project. For your
review we have enclosed one copy of the PCN Application Form, Attachment A — Additional Information,
USGS Quadrangle Map, Soil Survey Map, site photos, site plan with typical construction details, and
compensatory mitigation proposal.
The project titled "Blenheim Culvert Repairs /Stream Relocation Sanitary Sewer Protection" consists of
relocating a stream channel away from the immediate vicinity of a sanitary sewer line that has become
exposed and threatens the property owner's residence. This activity will occur in sanitary sewer easements
that have not been maintained in the last to years and on the 817 and 821 Blenheim properties owned by
Ms. Betty Twiggs. This project also includes the repair of a collapsed culvert and headwall on the 3301
Marblehead Lane property.
The construction described in this permit will result in a net stream loss of 147 linear feet and a net loss of
2,800 square feet of zone 1 and 4,700 square feet of zone 2 buffer. An additional 8,700 square feet of zone
1 and 2,715 square feet of zone 2 buffer will be temporarily impacted due to disturbance necessary to
perform the construction.
Response to Comments
Comment: The preconstruction notification (PCN) states that a culvert at Blenheim Drive would be
repaired under Nationwide Permit 3. However, there are no impacts associated with this repair listed in
the PCN stream impact table or on the plans. Please revise your application and plans to quantify /show
these impacts.
Response: The application has been revised to quantify the culvert repair impacts.
Comment: The plans submitted with the PCN are too large. Please submit revised drawing on paper
11x17 - inches or smaller.
Response: 11X17 -inch drawings are submitted with this package.
Comment: 2012 NWP Wilmington District Regional Condition 3.2 requires the submittal of a
compensatory mitigation proposal for any NWP that results in a loss of more than 150 linear feet of
perennial and /or ephemeral /intermittent stream. for perennial and intermittent streams, a

Mr. David Shaeffer
131cnheiin Culvert Repairs/Stream lielocation Sanitary Sewer Protection
September 16, 2015
Page 2 of 2
compensatory mitigation ratio of 2:1 is normally required unless it can be demonstrated, using the
North Carolina Wetland Stream Assessment method, that the tributary is low functioning. Accordingly,
you must provide a compensatory mitigation proposal to compensate for 233 linear feet of stream at a
ratio of 2:1 or demonstrate that a lower ratio is appropriate. This compensatory mitigation requirement
could be partially satisfied with the stream relocation project provide you submit a
relocation /restoration plan in accordance with the compensatory mitigation regulations (33 CFR 332).
For North Carolina Department of Transportation Project, a ratio of 1:1 is normally given for onsite
stream relocations. Accordingly, if the abandoned channel is 233 linear feet and the relocated stream'is
86 linear feet, you would be responsible for providing the 147 linear feet of compensatory mitigation at
a ratio of 2:1'and the relocation /restoration plan.
Response: A compensatory mitigation proposal is included with this package. A compensatory
mitigation proposal ratio of 2:1 is proposed for 147 linear feet of stream.
Comment: You are reminded that, because this project involves clear cutting of trees within Wake
County and within the Corps ESA action area, our office is required to consult with the U. S. Fish and
Wildlife Service on the Northern Long -eared Bat. This consultation process can take more than 30 -days
and cannot be initiated until a complete application is submitted. This informal consultation is usually
conducted through e-mail. Please submit an electronic copy of the preconstruction notification and
associated documents to facilitate a timely consultation process.
Response: An electronic copy of this application is being submitted.
Please contact me with any questions regarding this permit application.
Sincerely,
Dewberry Engineers Inc.
�z �
Beth Steffens, PE
Enclosures
CC: Karen Higgins, NC DENR; Rachelle Rhodes, Public Utilities; Matt Watt, Dewberry
P: \50o 6o i 86 \Adm \Permits
Dewberry

�a�sos�S vC;L
woe wA,rF9O Office Use Only:
�� Corps action ID no.
o �r� ��� � DWQ project no
Form Version 1.4 January 2009
Pre - Construction Notification (PCN) Form
A. Applicant Information
1. Processing
1a. Type(s) of approval sought from the Corps: I ❑X Section 404 Permit ❑ Section 10 Permit
1 b. Specify Nationwide Permit (NWP) number: 3 and 29 or General Permit (GP) number:
1c. Has the NWP or GP number been verified by the Corps? I ❑X Yes ❑ No
1d. Type(s) of approval sought from the DWQ (check all that apply):
Q 401 Water Quality Certification — Regular ❑ Non -404 Jurisdictional General Permit
❑ 401 Water Quality Certification — Express ❑X Riparian Buffer Authorization
1 e.
Is this notification solely for the record For the record only for DWQ For the record only for Corps Permit:
because written approval is not required? 401 Certification:
❑ Yes ❑X No
❑X Yes ❑ No
1f.
Is payment into a mitigation bank or in -lieu fee program proposed for
mitigation of impacts? If so, attach the acceptance letter from mitigation bank
❑ Yes ❑X No
or in -lieu fee program.
1g.
Is the project located in any of NC's twenty coastal counties. If yes, answer 1 h
❑ Yes ❑X No
below.
1 h.
Is the project located within a NC DCM Area of Environmental Concern (AEC)?
❑ Yes ❑X No
2.
Project Information
2a.
Name of project: Blenheim Stream Relocation and Culvert Repair
2b.
County: Wake
2c.
Nearest municipality / town: City of Raleigh
12d.
Subdivision name:
2e.
NCDOT only, T.I.P. or state project no:
3.
Owner Information
( (�!� t _
3a.
Name(s) on Recorded Deed:
�� M E v !U f '
3b.
Deed Book and Page No.
3c.
Responsible Party (for LLC if City of Raleigh (Public Utilities Department)
5 2015
applicable):
3d.
Street address: 222 W. Hargett Street
DENR - WATER RESOURCES
an+ x. ai i�F�a pcnnnirr�+.��
3e.
City, state, zip: Raleigh, INC 27601
3f.
Telephone no.: 919 - 996 -4540
3g.
Fax no.: 919- 857 -4545
3h.
Email address:
Page 1 of 10
PCN Form — Version 1.4 January 2009

4. Applicant Information (if different from owner)
4a. Applicant is: ❑X Agent ❑ Other, specify:
4b. Name:
4c. Business name
(if applicable):
4d. Street address:
4e. City, state, zip:
4f. Telephone no.:
4g. Fax no.:
4h. Email address:
5. Agent/Consultant Information (if applicable)
5a. Name: Elizabeth B. Steffens, PE
5b. Business name
(if applicable):
5c. Street address:
5d. City, state, zip:
5e. Telephone no.:
5f. Fax no.:
5g. Email address:
Dewberry Engineers Inc. (Dewberry)
2301 Rexwoods Drive Suite 200
Raleigh, NC 27607
984 - 232 -6795
919 - 881 -9923
[e-mail]
Page 2 of 10

B. Project Information and Prior Project History
1 1. Property Identification
1 1a. Property identification no. (tax PIN or parcel ID):
1 1 b. Site coordinates (in decimal degrees): I Latitude: 35.8269
1 1 c. Property size:
1 2. Surface Waters
1 2a. Name of nearest body of water to proposed project:
1 2b. Water Quality Classification of nearest receiving water:
1 2c. River basin:
10795665073 and 0795657901
Longitude: - 78.6742
1.42 acres
Crabtree Creek
C;NSW
Neuse
3. Project Description
3a. Describe the existing conditions on the site and the general land use in the vicinity of the project at the time of this
application:
See Attachment A - Additional Information
3b. List the total estimated acreage of all existing wetlands on the property: 0
3c. List the total estimated linear feet of all existing streams (intermittent and perennial) on the property: 507
3d. Explain the purpose of the proposed project:
See Attachment A - Additional Information
3e. Describe the overall project in detail, including the type of equipment to be used:
See Attachment A - Additional Information
4. Jurisdictional Determinations
4a. Have jurisdictional wetland or stream determinations by the ❑ Yes ❑ No ❑X Unknown
Corps or State been requested or obtained for this property /
project (including all prior phases) in the past? Comments:
4b. If the Corps made the jurisdictional determination, what type Preliminary ❑ Final
of determination was made?
4c. If yes, who delineated the jurisdictional areas? Agency /Consultant Company: US Army Corps of Engineers
Name (if known)- David Schaeffer Other:
4d. If yes, list the dates of the Corps jurisdictional determinations or State determinations and attach documentation.
June 1, 2015
5. Project History
5a. Have permits or certifications been requested or obtained for ❑ Yes ❑ No ❑X Unknown
this project (including all prior phases) in the past?
5b. If yes, explain in detail according to "help file" instructions.
6. Future Project Plans
6a. Is this a phased project?
6b. If yes, explain.
❑ Yes ❑X No
Page 3 of 10
PCN Form — Version 1.4 January 2009

C. Proposed Impacts Inventory
1. Impacts Summary
1 a. Which sections were completed below for your project (check all that apply):
❑ Wetlands ❑X Streams — tributaries ❑X Buffers ❑ Open Waters ❑. Pond Construction
2. Wetland Impacts
If there are perennial or intermittent stream impacts (including temporary impacts) proposed on the site, then complete this
question for all stream sites Impacted.
If there are wetland impacts proposed on the site,
then complete this question for each wetland area impacted.
Stream impact Type of impact Stream name Perennial (PER) or Type of Average
2a. 2b.
2c.
length
2d. 2e.
2f.
Wetland impact
Type of impact
Type of wetland
Forested Type of jurisdiction
Area of
number
86
S3 T Culvert UT to Crabtree Creek I PER Corps 8
Corps (404,10) or
impact
Permanent (P) or
85 Choose one
- -
DWQ (401, other)
(acres)
Temporary (T)
3h. Total stream and tributary impacts
P:147, T-30
3i. Comments:
W1 -
Choose one
Choose one
Yes /No -
W2 -
Choose one
Choose one
Yes /No -
W3 -
Choose one
Choose one
Yes /No -
W4 -
Choose one
Choose one
Yes /No -
W5 - .
Choose one
Choose one
Yes /No -
W6 -
Choose one
I
Choose one
Yes /No -
2g. Total Wetland Impacts:
2h. Comments:
3. Stream Impacts.
If there are perennial or intermittent stream impacts (including temporary impacts) proposed on the site, then complete this
question for all stream sites Impacted.
3a. 3b. 3c. 3d. 3e. 3f.
3g.
Stream impact Type of impact Stream name Perennial (PER) or Type of Average
Impact
number intermittent (INT)? jurisdiction stream
length
Permanent (P) or width
(linear
Temporary (T) (feet)
feet)
S1 P Fill UT to Crabtree Creek I PER Corps 8
-233
S2 P Relocation UT to Crabtree Creek
PER Corps 8
86
S3 T Culvert UT to Crabtree Creek I PER Corps 8
30
S4 Choose one I -
85 Choose one
- -
S6 - Choose one
-
3h. Total stream and tributary impacts
P:147, T-30
3i. Comments:
The goal of the stream location is to minimize to the extent possible stream bank erosion that could threaten the sanitary sewer line and home structure
at 817 Blenheim Drive . Approximately 233 LF of the creek will be abandoned and a new channel, approximately 86 LF in length will be established,
resulting in a net 147 LF stream loss. 25 LF of stream will be temporarily impacted during culvert repair.
Page 4 of 10
PCN Form — Version 1.4 January 2009

4. Open Water Impacts
If there are proposed impacts to lakes, ponds, estuaries, tributaries, sounds, the Atlantic Ocean, or any other open water of
the U.S. then individually list all open water impacts below.
impacts
4a. 4b. 4c.
4d. 4e.
Open water Name of waterbody
6a. Project is in which protected basin? ❑X Neuse ❑ Tar - Pamlico ❑ Catawba ❑ Randleman
impact number (if applicable)
Type of impact Waterbody Area of impact (acres)
Permanent (P) or
type
Temporary (T)
Buffer Impact Reason for impact Stream name Buffer
01
Choose one Choose
O2
Choose one Choose
03
Choose one Choose
04
Choose one Choose
Temporary (T)
feet)
4f. Total open water impacts
4g. Comments:
5. Pond or Lake Construction
If pond or lake construction proposed, then complete the chart below.
5a. 5b. 5c. 5d. 5e.
Pond ID number Proposed use or Wetland Impacts (acres) Stream Impacts (feet) Upland
purpose of pond (acres)
Flooded Filled Excavated Flooded Filled Excavated
P1 Choose one
P2 Choose one
5f. Total:
5g. Comments:
e
5h. Is a dam high hazard permit required? ❑ Yes ❑ No If yes, permit ID no:
5i. Expected pond surface area (acres):
5j. Size of pond watershed (acres):
5k. Method of construction:
6. Buffer Impacts (for DWQ)
If project will impact a protected riparian buffer, then complete the chart below. If yes, then individually list all buffer
impacts
below. If any impacts require mitigation, then you MUST fill out Section D of this form.
6a. Project is in which protected basin? ❑X Neuse ❑ Tar - Pamlico ❑ Catawba ❑ Randleman
❑ Other:
6b. 6c. 6d. 6e. 6f.
6g.
Buffer Impact Reason for impact Stream name Buffer
Zone 1
Zone 2
number - mitigation
impact
impact
Permanent (P) or required?
(square
(square
Temporary (T)
feet)
feet)
B1 P Buffer lost due to relocation UT of Crabtree Creek I No
-6,800
-8,100
B2 P New buffer segment UT of Crabtree Creek No
4,000
3,400
B3 T Construction UT of Crabtree Creek I No
2,600
840
B4 T Construction UT of Crabtree Creek
No
I
1,800
75
B5 T Construction UT of Crabtree Creek
No
4,300
I 1,800
B6
Yes /No
6h. Total Buffer Impacts: I
5,900
-1,985
6i. Comments: Estimated 6,800sf area of Zone 1 and 8,100sf of Zone 2 buffer will be lost due to the abandoned stream segment The new stream
segment will restore 4,000sf of Zone 1, and 3,400sf of Zone 2 buffer, resulting in a net loss of 2,800 sf Zone 1 and 4,700 Zone 2.
Page 5 of 10

D. Impact Justification and Mitigation
1. Avoidance and Minimization
1a. Specifically describe measures taken to avoid or minimize the proposed impacts in designing project.
See Attachment A - Additional Information
1 b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques.
The placement of rip -rap will be limited to the area immediately around the new stream bank and will not intrude into the stream. A pump- around or
coffer dam will be used during construction to ensure all work occurs in the dry. After construction is completed the disturbed area will be covered with
coir matting, mulched, and reseeded The riparian buffer area will also be re- vegetated with native plant species.
2. Compensatory Mitigation for Impacts to Waters of
2a. Does the project require Compensatory Mitigation for
impacts to Waters of the U.S. or Waters of the State?
2b. If yes, mitigation is required by (check all that apply):
2c. If yes, which mitigation option will be used for this
project?
the U.S. or Waters of the State
❑X Yes ❑ No
❑ DWQ ❑X Corps
❑ Mitigation bank
❑X Payment to in -lieu fee program
❑ Permittee Responsible Mitigation
3.
Complete if Using a Mitigation Bank
3a.
Name of Mitigation Bank.
Type: Choose one
Quantity:
3b.
Credits Purchased (attach receipt and letter) Type: Choose one
Quantity:
Type: Choose one
Quantity:
3c.
Comments:
4.
Complete if Making a Payment to In -lieu Fee Program
4a.
Approval letter from in -lieu fee program is attached.
❑X Yes
4b.
Stream mitigation requested: 294
linear feet
4c.
If using stream mitigation, stream temperature: warm
4d.
Buffer mitigation requested (DWQ only): 0
square feet
4e.
Riparian wetland mitigation requested: 0
acres
4f.
Non - riparian wetland mitigation requested: 0
acres
4g.
Coastal (tidal) wetland mitigation requested: 0
acres
4h.
Comments:
5.
Complete if Using a Permittee Responsible Mitigation Plan
5a. If using a permittee responsible mitigation plan, provide a description of the proposed mitigation plan.
See Attachment B.
Page 6 of 10
PCN Form — Version 1.4 January 2009

6. Buffer Mitigation (State Regulated Riparian Buffer Rules) — required by DWQ
6a. Will the project result in an impact within a protected riparian buffer that requires Yes ❑X No
buffer mitigation?
6b. If yes, then identify the square feet of impact to each zone of the riparian buffer that requires mitigation. Calculate the
amount of mitigation required.
6c. 6d. 6e.
Zone Reason for impact Total impact Multiplier Required mitigation
(square feet) (square feet)
Zone 1
3 (2 for Catawba)
Zone 2 I 1.5
6f. Total buffer mitigation required:
6g. If buffer mitigation is required, discuss what type of mitigation is proposed (e.g., payment to private mitigation bank,
permittee responsible riparian buffer restoration, payment into an approved in -lieu fee fund).
6h. Comments:
Page 7 of 10

E. Stormwater Management and Diffuse Flow Plan (required by DWQ)
1. Diffuse Flow Plan
1 a. Does the project include or is it adjacent to protected riparian buffers identified ❑X Yes
within one of the NC Riparian Buffer Protection Rules?
1 b. If yes, then is a diffuse flow plan included? If no, explain why.
Project will not alter diffuse flow patterns.
E] Yes
2. Stormwater Manaqement Plan
2a. What is the overall percent imperviousness of this project? 0
2b. Does this project require a Stormwater Management Plan? ❑ Yes
2c. If this project DOES NOT require a Stormwater Management Plan, explain why:
Disturbed area will be less than 1 acre
■ •
X❑ No
0 No
2d. If this project DOES require a Stormwater Management Plan, then provide a brief, narrative description of the plan:
2e. Who will be responsible for the review of the Stormwater Management Plan?
3. Certified Local Government Stormwater Review
3a. In which local government's jurisdiction is this project? City of Raleigh
❑ Phase II
3b. Which of the following locally- implemented stormwater management programs ❑ NSW
apply (check all that apply): ❑ USMP
❑ Water Supply Watershed
0 Other: None
3c. Has the approved Stormwater Management Plan with proof of approval been El Yes ❑ No
attached?
4. DWQ Stormwater Program Review
❑Coastal counties
❑HQW
4a. Which of the following state - implemented stormwater management programs apply ❑ORW
(check all that apply): ❑Session Law 2006 -246
❑X Other: None
4b. Has the approved Stormwater Management Plan with proof of approval been ❑ Yes ❑ No
attached?
5. DWQ 401 Unit Stormwater Review
5a. Does the Stormwater Management Plan meet the appropriate requirements? ❑ Yes ❑ No
5b. Have all of the 401 Unit submittal requirements been met? ❑ Yes ❑ No
Page 8 of 10
PCN Form — Version 1.4 January 2009

F. Supplementary Information
1. Environmental Documentation (DWQ Requirement)
1 a. Does the project involve an expenditure of public (federal /state /local) funds or the ❑X Yes ❑ No
use of public (federal /state) land?
1 b. If you answered "yes" to the above, does the project require preparation of an
environmental document pursuant to the requirements of the National or State El Yes ❑X No
(North Carolina) Environmental Policy Act (NEPA/SEPA)?
1 c. If you answered "yes" to the above, has the document review been finalized by the
State Clearing House? (If so, attach a copy of the NEPA or SEPA final approval
letter.) ❑ Yes ❑ No
Comments:
2. Violations (DWQ Requirement)
2a. Is the'site in violation of DWQ Wetland Rules (15A NCAC 2H .0500), Isolated
Wetland Rules (15A NCAC 2H .1300), DWQ Surface Water or Wetland Standards, ❑Yes ❑X No
or Riparian Buffer Rules (15A NCAC 2B .0200)?
2b. Is this an after - the -fact permit application? ❑Yes ❑X No
2c. If you answered "yes" to one or both of the above questions, provide an explanation of the violation(s):
3. Cumulative Impacts (DWQ Requirement)
3a. Will this project (based on past and reasonably anticipated future impacts) result in I F1 Yes ❑ No
additional development, which could impact nearby downstream water quality?
3b. If you answered "yes" to the above, submit a qualitative or quantitative cumulative impact analysis in accordance with the
most recent DWQ policy. If you answered "no," provide a short narrative description.
Project will not result in additional land development
4. Sewage Disposal (DWQ Requirement)
4a. 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.
No wastewater will be generated during this project.
Page 9 of 10
PCN Form — Version 1.4 January 2009

5. Endangered Species and Designated Critical Habitat (Corps Requirement)
5a. Will this project occur in or near an area with federally protected species or ❑ Yes ❑ No
habitat?
5b. Have you checked with the USFWS concerning Endangered Species Act ❑ Yes ❑ No
impacts?
5c. If yes, indicate the USFWS Field Office you have contacted.
5d. What data sources did you use to determine whether your site would impact Endangered Species or Designated Critical
Habitat?
6. Essential Fish Habitat (Corps Requirement)
6a. Will this project occur in or near an area designated as essential fish habitat? I ❑ Yes ❑ No
6b. What data sources did you use to determine whether your site would impact Essential Fish Habitat?
7. Historic or Prehistoric Cultural Resources (Corps Requirement)
7a. Will this project occur in or near an area that the state, federal or tribal
governments have designated as having historic or cultural preservation F1 Yes ❑ No
status (e.g., National Historic Trust designation or properties significant in
North Carolina history and archaeology)?
7b. What data sources did you use to determine whether your site would impact historic or archeological resources?
8. Flood Zone Designation (Corps Requirement)
8a. Will this project occur in a FEMA- designated 100 -year floodplain?
8b. If yes, explain how project meets FEMA requirements:
8c. What source(s) did you use to make the floodplain determination?
FEMA FIRM Map #3720079500J, Effective May 2, 2006
—Ruffin L. Hall
City Manager
City of Raleigh
Post Office Box 590
Raleigh, North Carolina 27602
Applicant/Agent's Printed Name
❑ Yes
Ap enVAgent's Signature
(Agent's re Is valid only if an authorization
1 e the applicant is provided.)
Page 10 of 10
x❑ No
q,`f 5

Attachment A —Additional Information
3.3.a Describe existing conditions and land use:
Extreme oxbowing and streambed deepening of an unnamed tributary of Crabtree Creek has eroded the stream
bank and threatens the integrity of sanitary sewer lines. Oxbowing of the stream has exposed bell joints in the 8-
inch ductile iron sanitary sewer gravity line, and the sanitary sewer line is now approximately five feet above the
bottom of the stream bed due to natural streambed deepening. The undercutting of the stream bank at the oxbow
is naturally forcing the stream towards the property owner's home, posing a threat to the integrity of the
structure. Land use in the vicinity of the area is residential.
3.3.d Explain the purpose of the proposed project
The purpose of the proposed project is to relocate the stream channel away from the immediate vicinity of the
sanitary sewer line and property owner's residence to prevent damage to the sanitary sewer infrastructure and
property.
As part of this construction project, a collapsed culvert and headwall will be'repaired and replaced at the 3301
Marblehead Lane property that is across the street from the 821 Blenheim property.
3.3.e. Detailed project description including equipment to be used
Oxbowing and streambed deepening threatens the integrity of a sanitary sewer line and property owner's
residence. The sanitary sewer line is located within an easement that has not been maintained in the last 10 years.
A pump around or coffer dam will be used during construction to ensure all work occurs in the dry. Construction
activity will consist of clearing an area to access the project location, excavating a new stream channel, and
filling /grading the existing channel to move the stream away from the sanitary sewer line and residence. Channel
blocks will be installed to prevent re- cutting of the old stream channel and rip -rap will be placed along the new
stream channel to prevent further erosion. A cross -vane will be installed in the new stream channel to provide
energy dissipation. Native streambed material (to a 1ft depth) will be raked out of the section of stream to be
abandoned and will be stored until a new channel is formed. The reserved stream bed material will be placed in
the new stream channel prior to removal of the pump around. The excavated and graded area will be covered with
coir matting and reseeded to prevent erosion. Stream bank stabilization details are attached with this application.
Conventional construction equipment (hydraulic excavators and dumptrucks) will be used. The buffer disturbance
will be seeded and mulched. Traditional sediment control devices and conventional construction equipment will be
used.
,D.1.a Specifically describe measures taken to avoid or minimize the proposed impacts in designing project.
The new stream channel was designed to provide adequate meandering and velocity reduction to reduce future
natural channel movements in this area. The placement of rip -rap will be limited to the area immediately around
the new stream bank and will not intrude into the stream. A pump- around or coffer dam will be used during
construction to ensure all work occurs in the dry. A cross vane will be installed to provide energy dissipation in the
new stream channel and allow for a gradual slope of the channel. After construction is completed the disturbed
area will be covered with coir matting, mulched, and reseeded. The riparian buffer area will also be re- vegetated
with native plant species.

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Blenheim Culvert Repair /Stream Restoration Sanitary Sewer Protection
�ite Conditions
Figure 1: Facing north -west. Oxbowing of the stream has
exposed bell joint along the sanitary sewer line. The
sanitary sewer aerial is approximately 6 feet above the
streambed due to natural streambed deepening.
Figure 2: Facing north -east. Oxbowing of
stream has pushed the streambank towards
the homeowner's property, threatening the
structure.

Blenheim Culvert Repair /Stream Restoration Sanitary Sewer Protection
Existing Site Conditions
Figure 3: Facing east, on the north side of the oxbow. Figure 4: Facing east, on south side of oxbow. Sanitary sewer
Sanitary sewer aerial is approximately 6 feet above aerial is approximately 6 feet above the bottom of the
the bottom of the streambed, with exposed bell streambed with exposed bell joints.
joints.

Blenheim Culvert Repair /Stream Restoration Sanitary Sewer Protection
Existing Site Conditions
Figure 5: Facing northwest. Culvert and
headwall collapse.

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ENGINEERS INC.
2. HORIZONTAL CONTROL (NAD83) AND VFRTICX CONTROL. (NAVD88) ESTABLISHED
BY CPS OBSERVATIONS AND COMPUTED USING NORTH CAROLINA GEODETIC
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City of Raleigh — Blenheim stream relocation & culvert repair
Compensatory Mitigation Proposal
The proposed project will permanently impact 233 linear feet of medium quality perennial stream
located in a highly urbanized environment. A portion of this stream will be relocated on site (see
attached plans). We propose that these 86 feet of relocated stream be used to mitigate 86 feet of
impacts at a 1:1 ratio. Mitigation banks in 03020201 where the impacts will occur have been contacted;
however, credits are not currently available. Therefore, the remaining 147 feet of impact will be
mitigated through the NC Division of Mitigation Services at a 2:1 ratio. See attached acceptance letter
for 294 feet of mitigation in HUC 03020201.
August 27, 2015
Rev Sept 1, 2015

4
NCDETIR
North Carolina Department of Environment and Natural Resources
Pat McCrory
Governor
Division of Mitigation Services
August 25, 2015
Rachelle Rhodes
City of Raleigh Public Utilities
PO Box 590
Raleigh, NC 27602.
Project: Blenheim Stream Relocation and Culvert Repair
Donald R. van der Vaart
Secretary
Expiration of Acceptance: February 25, 2016
County: Wake
The purpose of this letter is to notify you that the NCDENR Division of Mitigation Services (DMS) is willing to accept payment for
compensatory mitigation for impacts associated with the above referenced project as indicated in the table below. Please note that this
decision does not assure that participation in the DMS in -lieu fee mitigation program will be approved by the permit issuing agencie's
as mitigation for project impacts. It is the responsibility of the applicant to contact permitting agencies to determine if payment to the
DMS will be approved. You must also comply with all other state, federal or local government permits, regulations or authorizations
associated with the proposed activity including G.S. § 143- 214.11.
This acceptance is valid for six months from the date of this letter and is not transferable. If we have not received a copy of the
issued 404 Permit/401 Certification/CAMA permit within this time frame, this acceptance will expire. It is the applicant's
responsibility to send copies of the permits to DMS. Once DMS receives a copy of the permit(s) an invoice will be issued based on
the required mitigation in that permit and payment must be made prior to conducting the authorized work. The amount of the in -lieu
fee to be paid by an applicant is calculated based upon the Fee Schedule and policies listed at www.nceep.net.
Based on the information supplied by you in your request to use the DMS, the impacts that may require compensatory mitigation are
summarized in the following table. The amount of mitigation required and assigned to DMS for this impact is determined by
permitting agencies and may exceed the impact amounts shown below.
River Basin CU ` Stream (feet) Wetlands (acres) Buffer I Buffer II
Location I (Sq. Ft.) (Sq. Ft.)
Cold Cool Warm Riparian Non - Riparian Coastal Marsh
Impact Neuse 03020201 0 I 0' 294 0 1 0 1 0 1 0 0
Upon receipt of payment, DMS will take responsibility for providing the compensatory mitigation. The mitigation will be performed
in accordance with the In -Lieu Fee Program instrument dated July 28, 2010.
Thank you for your interest in the DMS in -lieu fee mitigation program. If you have any questions or need additional information,
please contact Kelly Williams at (919) 707 -8915.
Sincerely,
QF4,V�SqA
James. V Stanfill
Asset Management Supervisor
cc: David Schaeffer, USACE - Raleigh
Beth Steffens, agent
1652 Mail Service Center, Raleigh, North Carolina 27699 -1652
Phone: 919 - 707 -89761 Internet: www.nceep.net
An Equal Opportunity l Affirrnative Action Employer — Made in part from recycled paper