20120202 Ver 2_Riparian Buffer Authorization_20181030

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State of North Carolina
\\ Department of Environmental Quality
Division of Water Resources Division of Water Resources
15A NCAC 02B .0233 (8)(b), .0243 (8)(b), .0250 (11)(b), .0259 (8)(b), .0267 (11)(c), .0607 (e)(2) - Buffer Authorization
FORM: BA 10-2013
Riparian Buffer Authorization Form
A.
Applicant Information
1.
Project Information
1 a. Name of project:
City of Raleigh Crabtree Creek Greenway Retaining Wall Replacement
1 b. County:
Wake
1c. Nearest municipality:
Raleigh
1d. Subdivision name:
1e. Is the project located in any of North Carolina's twenty coastal counties?
If yes, answer 1f below.
❑ Yes ® No
1f. Is the project located within a NC Division of Coastal Management Area of
Environmental Concern (AEC)?
❑ Yes ® No
2.
Owner Information
2a. Name on Recorded Deed:
City of Raleigh easement
2b. Deed Book and Page No.
2c. Map Book and Page No.
(include a copy of the
recorded map that indicates
when the lot was created):
2d. Responsible Party
for Corporations):
Parks, Recreation, and Cultural Resources Department
2e. Street address:
222 West Hargett Street
2f. City, state, zip:
Raleigh, NC 27601
2g. Telephone no.:
919-996-4798
2h. Fax no.:
2i. Email address:
[e-mail]
3.
Applicant Information (if different from owner)
3a. Applicant is:
❑ Agent ❑ Other, specify:
3b. Name:
3c. Business name
if applicable):
3d. Street address:
3e. City, state, zip:
3f. Telephone no..-
o.:3g.
3g.Fax no.:
31h. Email address:
4.
Agent/Consultant Information (if applicable)
4a. Name:
Phil May
4b. Business name
if applicable):
Carolina Ecosystems, Inc.
4c. Street address:
3040 INC Hwy 42 W
4d. City, state, zip:
Clayton, NC 27520
4e. Telephone no.:
919-606-1065
4f. Fax no.:
4g. Email address:
[e-mail]
FORM: BA 10-2013 Page 1 of 4

B.
Project Information and Prior Project History
1.
Property Identification
1 a. Property identification no. (tax PIN or parcel ID):
1 b. Site coordinates (in decimal degrees): Latitude: 35.839349 1 Longitude: -78.668235
1 c. Property size: Approximately 0. 14 acres
2.
Surface Waters
2a. Name of nearest body of water to proposed project: Crabtree Creek
2b. Water Quality Classification of nearest receiving water: C; NSW
2c. River basin: 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:
The site is located on one of City of Raleigh's existing greenways. The surrounding vicinity consists of
commercial and residential areas.
3b. Attach an 8'/2 x 11 excerpt from the most recent version of the USGS topographic map indicating the location
of the site
3c. Attach an 8'/2 x 11 excerpt from the most recent version of the published County NRCS Soil Survey Map
depicting the project site
3d. List the total estimated linear feet of all existing streams (intermittent and perennial) on the property:
Approximately 240 linear feet.
3e. Explain the purpose of the proposed project:
Replace retaining wall along the Crabtree Creek Greenway to ensure the safety of greenway users.
3f. Describe the overall project in detail, including the type of equipment to be used:
Perform minor tree clearing to get access for retaining wall replacement along Crabtree Creek Greenway.
4.
Jurisdictional Determinations
4a. Have jurisdictional wetland or stream determinations by
the Corps or State been requested or obtained for this
property/ project (including all prior phases) in the past?
❑ Yes ® No ❑ Unknown
Comments: Project was reviewed and no
wetlands were found.
4b. If yes, who delineated the jurisdictional areas?
Name (if known):
Agency/ Consultant Company:
Other:
4c. If yes, list the dates of the Corps jurisdictional determinations or State determinations and attach
documentation.
5.
Project History
5a. Have permits or certifications been requested or obtained
for this project (includino all priorphases) in thepast?
® Yes ❑ No ❑ Unknown
5b. If yes, explain and detail according to "help file" instructions.
A buffer authorization was issued in 2017. Changes in the retaining wall design resulted in minor additional
impacts to buffers, requiring this revised application.
6.
Future Project Plans
6a. Is this a phased project? ❑ Yes ® No
6b. If yes, explain.
FORM: BA 10-2013 Page 2 of 4

C. Proposed Impacts Inventory
1. Avoidance and Minimization
1a. Specifically describe measures taken to avoid or minimize the proposed impacts in designing project.
1. Buffer Impacts
1 b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction
techniques. Sediment and erosion control measures will be implemented according to NC requirements, and
1a. Project is in which protected basin?
® Neuse
❑ Randleman
❑ Tar -Pamlico
❑ Jordan
❑ Catawba
❑ Goose Creek
1 b. Individually list all buffer impacts below. If any impacts require mitigation, then you MUST fill out Section D of
this form.
Buffer impact Reason for Type of impact Stream name
number — impact (exempt, allowable,
Permanent (P) allowable w/
or Temporary mitigation)
T
Buffer
mitigation
required?
Zone 1
impact
(sq ft)
Zone 2
impact
(sq ft)
B1 ® P ❑ T Retaining Wall Allowable Crabtree Creek
Replacement
❑ Yes ® No
1,457
198
B2 ❑ P ❑ T
❑ Yes ❑ No
(square feet
s uare feet
B3 ❑ P ❑ T
❑ Yes ❑ No
Zone 2
B4 ❑ P ❑ T
❑ Yes ❑ No
Total buffer mitigation required:
B5 ❑ P ❑ T
❑ Yes ❑ No
❑ Yes ❑ No
proposed?
B6 ❑ P ❑ T
❑ Yes ❑ No
2e. If no, then discuss what type of mitigation is proposed.
2f. Comments:
Total buffer impacts
1,457
198
1c. Comments: Total buffer impact change as a result of revised wall type is 215 sq ft (1,440 to 1,655)
D. Impact Justification and Mitigation
1. Avoidance and Minimization
1a. Specifically describe measures taken to avoid or minimize the proposed impacts in designing project.
This project will only minimally impact the buffer due to tree clearing for access for retaining wall replacement.
1 b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction
techniques. Sediment and erosion control measures will be implemented according to NC requirements, and
approved by NCDEQ prior to implementation. Jurisdictional areas that are not permitted to be impacted and
are adjacent to construction areas will be clearly marked with protection fencing or other similar method to
avoid inadvertent encroachment. Copies of the issued buffer authorization and impact areas will be provided
to the prime contractor and all subcontractors working in or near jurisdictional areas.
2. Buffer Mitigation
2a. Will the project result in an impact within a protected riparian buffer that
❑ Yes ® No
requires buffer mitigation?
2b. If yes, then identify the square feet of impact to each zone of the riparian buffer that requires mitigation and
calculate the amount of mitigation required in the table below.
Zone
Reason for impact Total impact Multiplier
Required mitigation
(square feet
s uare feet
Zone 1
3 (2 for Catawba)
Zone 2
1.5
Total buffer mitigation required:
2c. If buffer mitigation is required, is payment to a mitigation bank or NC DMS
❑ Yes ❑ No
proposed?
2d. If yes, attach the acceptance letter from the mitigation bank or NC DMS.
2e. If no, then discuss what type of mitigation is proposed.
2f. Comments:
FORM: BA 10-2013 Page 3 of 4

E. Diffuse Flow Plan
All buffer impacts and high ground impacts require diffuse flow or other form of
Diffuse flow
stormwater treatment. Include a plan that fully documents how diffuse flow will be
❑ Other BMP
maintained. If a Level Spreader Is proposed, attach a Level Spreader Supplement Form.
1 b. If you answered 'yes" to the above, does the project require preparation of an
If due to site constraints, a BMP other than a level spreader is proposed, please provide a
environmental document pursuant to the requirements of the National or State (North
plan for stormwater treatment as outlined in Chapter 8 of the NC Stormwater BMP
Carolina) Environmental Polley Act NEPA/SEPA ?
Manual and attach a BMP Supplement Form.
1 c. If you answered "yes" to the above, has the document been finalized by the State
F. Supplementary Information
1. Environmental Documentation
1 a. Does the project Involve an expenditure of public (federal/state local) funds or the
® Yes No
use of public federal/state land?
1 b. If you answered 'yes" to the above, does the project require preparation of an
❑ Yes 0 No
environmental document pursuant to the requirements of the National or State (North
Carolina) Environmental Polley Act NEPA/SEPA ?
1 c. If you answered "yes" to the above, has the document been finalized by the State
❑ Yes No
Clearing House? (If so, attach a copy of the NEPA or SEPA final approval letter.)
Comments:
2. Violations
2a. Is the site in violation of DWR Wetland Rules (15A NCAC 02H .0500), Isolated
❑ Yes E No
Wetland Rules (15A NCAC 02H .1300), DWR Surface Water or Wetland Standards,
or Riparian Buffer Rules 15A NCAC 02B .0200)?
2b. Is this an atter-the-fact permit application?
❑ Yes ®No
2c. If you answered "yes" to one or both of the above questions, provide an explanation of the violatlon(s):
Applicant/Agent's Printed Name Applicant/Agent's SI ature D to
(Agent's signature Is valid only it an authorization letter from the applicant Is provided.)
Send 3 complete sets of this form and accompanying documents to the following:
For government transportation projects sent by For government transportation projects sent by
First Class Mall via the US Postal Service: delivery service (UPS, FedEx, etc.):
NC DWR, Transportation Permitting Unit OR NC DWR, Transportation Permitting Unit
1617 Mail Service Center 512 N. Salisbury Street
Raleigh, NC 27699 - 1617 Raleigh, NC 27604
For all other projects sent by First Class Mail via For all other projects sent by delivery service
the US Postal Service (UPS, FedEx, etc.):
Karen Higgins Karen Higgins
NCDWR — 401 & Buffer Permitting Branch OR NCDWR — 401 & Buffer Permitting Branch
1617 Mail Service Center 512 N. Salisbury Street
Raleigh, NC 27699 - 1617 Raleigh, NC 27604
FORM: BA 10-2013 Page 4 of 4

PROPOSED MODULAR � EXISTING WALL 2 ----
BLOCK RETAINING WALL ITO BE REMOVED]
.0 1
11
1
�.L I
I
fA 1 I
II
I 1 START PROPOSED FILL
I 1 OF GREENWAY PATH
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SANITARY
EWER EASEMENT
fr 24
230
220 — ---_
210
10+90 11+00
S
BEGIN PROPO EDT
RETAINING WALL
WATER'S EDGE OCK OUTCROP
CRABTREE CREEK
PROPOSED GRADE T
OF GREENWAY PATH \
SANITARY —
SEWER EASEMENT
^' CITY OF RAM
�i
APPROXIMATE LIMITS
OF CONSTRUCTION
PROPOSE. PILE/SHEET PILE
TIE BACK WALL 1
EXISTING PROPERTY LINE/
CITY OF RALEIGH GREENWAY
EASEMENT
ALONG E CREEK
RETAINING WALL 1 SITE PLAN
ALLOWABLE IMPACTS ZONE 1
APPROX. AREA - 1457 SO. FT.
ALLOWABLE IMPACT$ ZONE 2
a APPROX.AREA - 198 SOFT.
8' PVC
ENO PROPOSED FILL
OF GREENWAY PATH
STA.13+20
S? ry$
Cs�=
O
2
TREES TO BE REMOVED
TREES TO BE REMAIN
_--'----- 9.11%
EXISTING GREENWAY PdTN BOTTOM OF WALL
11+50 12-00 12+50 13+00
STATION
RETAINING WALL 1 ELEVATION VIEW
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SANITARY
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PROPOSED MODULAR � EXISTING WALL 2 ----
BLOCK RETAINING WALL ITO BE REMOVED]
.0 1
11
1
�.L I
I
fA 1 I
II
I 1 START PROPOSED FILL
I 1 OF GREENWAY PATH
1 I 24 -CW STA.10+90
SANITARY
EWER EASEMENT
fr 24
230
220 — ---_
210
10+90 11+00
S
BEGIN PROPO EDT
RETAINING WALL
WATER'S EDGE OCK OUTCROP
CRABTREE CREEK
PROPOSED GRADE T
OF GREENWAY PATH \
SANITARY —
SEWER EASEMENT
^' CITY OF RAM
�i
APPROXIMATE LIMITS
OF CONSTRUCTION
PROPOSE. PILE/SHEET PILE
TIE BACK WALL 1
EXISTING PROPERTY LINE/
CITY OF RALEIGH GREENWAY
EASEMENT
ALONG E CREEK
RETAINING WALL 1 SITE PLAN
ALLOWABLE IMPACTS ZONE 1
APPROX. AREA - 1457 SO. FT.
ALLOWABLE IMPACT$ ZONE 2
a APPROX.AREA - 198 SOFT.
8' PVC
ENO PROPOSED FILL
OF GREENWAY PATH
STA.13+20
S? ry$
Cs�=
O
2
TREES TO BE REMOVED
TREES TO BE REMAIN
_--'----- 9.11%
EXISTING GREENWAY PdTN BOTTOM OF WALL
11+50 12-00 12+50 13+00
STATION
RETAINING WALL 1 ELEVATION VIEW
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