20140876 Ver 1_401 Application_20140814

WO&WK
DICKSON
community infrastructure consultants
August 6, 2014
Karen Higgins
NC Division of Water Resources
Archdale Building — 91h'Floor
512 N. Salisbury St.
Raleigh, North Carolina 27604
Dear Karen Higgins,
WK Dickson is pleased to submit a Nationwide Permit 12 Pre - Construction Notification (PCN) for the
Richland Creek Interceptor Under Neuse River project The PCN is being submitted on behalf of the City of
Raleigh The proposed project includes the installation ,of a 125 LF double barrel siphon crossing the Neuse
River- Additional work includes removing and replacing 126 square yards of existing, greenway'paVement
and installing several necessary connection pipes, manholes, and precast vaults The purpose ofrthe proposed
project is to address a potential service bottleneck at an existing ,sewer siphon that crosses the Neuse River
and ties into the Richland Creek Interceptor Because projected growth rates indicate the potential for
sanitary sewer overflow (SSOs) near this bottleneck, the proposed construction of a new double barrel 16 -inch
DIP siphon pipes will alleviate the bottleneck and provide adequate wastewater conveyance for the service
area
The attached PCN package includes PCN Form, mitigation request letters, supporting figures, and design
plans Total temporary stream and wetland impacts - resulting from the proposed project are 105 LF and 0 064
acres, respectively Buffer impacts resulting from the Richland Creek Interceptor Under Neuse River project
are 7782.4 square feet,of'temporary,buffer impact in Zone 1 and 4574 2 square feet of temporary buffer impact
in Zone 2. Permanent buffer impacts total' 2418.36 square feet- in Zone 1 and 1610.5 square feet in Zone 2,
resulting in a total of 402888 square feet of permanent impacts requiring mitigation The streams and
wetlands will, be restored to pre - construction contours and' stabilized. 'The project meets all conditions of the
NWP 12 and GC 3884.
Thank you for your prompt attention to this important project and please let me know if you have any
questions or require any additional information.
Sincerely,
W.K. Dickson & Co., Inc.
Brad Breslow
Project Scientist
cc David Shaeffer, United States Army Corp of Engineers
Daniel Ingram, WK Dickson Project Manager
720 Coi poi ate Centei Di ive
Raleigh, NC 27607
Tel [phone]
fax [phone]
www wk(ickson corn Transportation • Waler Resources • Urban De\elopment • Geomaucs

o�oF W aTF9OG
Office Use Only:
y r 2 0 1 4 0$ 7 6 Corps action ID no.
o < DWQ project no.
Form Version 1.4 January 2009
Page 1 of 10
PCN 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:
❑X Section 404 Permit ❑ Section 10 Permit
1 b. Specify Nationwide Permit (NWP) number: 12 or General Permit (GP) number: 3884
1 c.
Has the NWP or GP number been verified by the Corps?
❑ Yes ❑X No
1d.
Type(s) of approval sought from the DWQ (check all that apply):
❑X 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
because written approval is not required?
For the record only for DWQ
401 Certification:
❑ Yes NX No
For the record only for Corps Permit:
❑ Yes ❑X 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
or in -lieu fee program.
NX Yes ❑ No
1 g.
Is the project located in any of NC's twenty coastal counties. If yes, answer 1 h
below.
❑ Yes ❑X No
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:
Richland Creek Interceptor Under Neuse River
2b.
County:
Wake County
2c.
Nearest municipality / town:
City of Raleigh
2d.
Subdivision name:
NA
2e.
NCDOT only, T.I.P. or state project no:
3.
Owner Information
3a.
Name(s) on Recorded Deed:
See attached PCN narrative
3b.
Deed Book and Page No.
3c.
Responsible Party (for LLC if
applicable):
3d.
Street address:
i p
3e.
City, state, zip:
L= U -a tG5 lull
3f.
Telephone no.:
WIG i
3g.
Fax no.:
3h.
Email address:
Page 1 of 10
PCN Form — Version 1.4 January 2009

4.
Applicant Information (if different from owner)
4a.
Applicant is:
❑ Agent ❑ Other, specify:
4b.
Name:
Dennis Lassiter
4c.
Business name
(if applicable):
City of Raleigh- Public Utilities Department
4d.
Street address:
PO Box 590
4e.
City, state, zip:
Raleigh, NC 27602
4f.
Telephone no.:
919- 996 -3477
4g.
Fax no.:
919 - 857 -4545
4h.
Email address:
dennis.lassiter @raleighnc.gov
5.
Agent /Consultant Information (if applicable)
5a.
Name:
Daniel Ingram
5b.
Business name
(if applicable):
WK Dickson & Co., Inc.
5c.
Street address:
720 Corporate Center Dr.
5d.
City, state, zip:
Raleigh, NC 27607
5e.
Telephone no.:
919 - 782 -0495
5f.
Fax no.:
919 - 782 -9672
5g.
Email address:
dingram @wkdickson.com
Page 2 of 10

B.
Project Information and Prior Project History
1.
Property Identification
1a.
Property identification no. (tax PIN or parcel ID):
See Attached Narrative.
1 b.
Site coordinates (in decimal degrees):
Latitude: 35.931902 Longitude: -78.559618
1 c.
Property size:
3.2 acres
2.
Surface Waters
2a.
Name of nearest body of water to proposed project:
Neuse River
2b.
Water Quality Classification of nearest receiving water:
C NSW
2c.
River basin:
Neuse River Basin, USGS Cataloging Unit 03020201
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 attached narrative.
3b.
List the total estimated acreage of all existing wetlands on the property: 0.064
3c.
List the total estimated linear feet of all existing streams (intermittent and perennial) on the property: 105
3d. Explain the purpose of the proposed project:
See attached narrative.
3e. Describe the overall project in detail, including the type of equipment to be used:
See attached narrative.
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?
❑X Yes ❑ No ❑ Unknown
Comments:
4b.
If the Corps made the jurisdictional determination, what type
of determination was made?
Preliminary ❑ Final
4c.
If yes, who delineated the jurisdictional areas?
Name (if known): Daniel Ingram
Agency /Consultant Company: W.K. Dickson
Other:
4d. If yes, list the dates of the Corps jurisdictional determinations or State determinations and attach documentation.
Jurisdictional areas were delineated on May 28, 2014. David Shaeffer (USAGE) verified the delineation on July 8, 2014.
5.
Project History
5a.
Have permits or certifications been requested or obtained for
this project (including all prior phases) in the past?
❑ Yes ❑X No ❑ Unknown
5b.
If yes, explain in detail according to "help file" instructions.
6.
Future Project Plans
6a.
Is this a phased project?
❑ Yes ❑X No
6b.
If yes, explain.
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):
❑X Wetlands ❑X Streams — tributaries ❑X Buffers ❑ Open Waters ❑ Pond Construction
2. Wetland Impacts
If there are wetland impacts proposed on the site, then complete this question for each wetland area impacted.
2a.
Wetland impact
number
Permanent (P) or
Temporary T
2b.
Type of impact
2c.
Type of wetland
2d.
Forested
2e.
Type of jurisdiction
Corps (404,10) or
DWQ (401, other)
2f.
Area of
impact
(acres)
W1 T
Fill
Bottomland Hardwood Forest
No
Corps
0.052
W2 T
Fill
Bottomland Hardwood Forest
Yes
Corps
0.012
W3
Choose one
Choose one
Yes /No
W4 -
Choose one
Choose one
Yes /No
W5 -
Choose one
Choose one
Yes /No
W6 -
Choose one
Choose one
Yes /No
2g. Total Wetland Impacts:
0.064
2h. Comments:
Construction access routes.
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.
Stream impact
number
Permanent (P) or
Temporary (T)
3b.
Type of impact
3c.
Stream name
3d.
Perennial (PER) or
intermittent (INT)?
3e.
Type of
jurisdiction
3f.
Average
stream
width
(feet)
3g.
Impact
length
(linear
feet)
S1 T
Excavation
Neuse Rlver
PER
Corps
125
45
S2 T
Fill
UT1 to Neuse River
PER
Corps
10
25
S3 T
Fill
UT2 to Neuse Rlver
PER
Corps
8
35
S4 -
Choose one
S5 -
Choose one
-
S6 -
Choose one
3h. Total stream and tributary impacts
105
3i. Comments:
S1 is constructing a sewer siphon. S2 and S3 are construction access routes.
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 indivi ually list all open water impacts below.
4a.
Open water
impact number
Permanent (P) or
Temporary T
4b.
Name of waterbody
(if applicable)
4c.
Type of impact
4d.
Waterbody
type
4e.
Area of impact (acres)
01 -
Choose one
Choose
02 -
Choose one
Choose
03 -
Choose one
Choose
04 -
Choose one
Choose
4f. Total open water impacts
4g. Comments:
5. Pond or Lake Construction
If pond or lake construction proposed, the complete the chart below.
5a.
Pond ID number
5b.
Proposed use or
purpose of pond
5c.
Wetland Impacts (acres)
5d.
Stream Impacts (feet)
5e.
Upland
(acres)
Flooded
Filled
Excavated
Flooded
Filled
Excavated
P1
Choose one
P2
Choose one
5f. Total:
5g. Comments:
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?
0 Neuse ❑ Tar - Pamlico ❑ Catawba ❑ Randleman ❑ Other:
6b.
Buffer Impact
number -
Permanent (P) or
Temporary (T )
6c.
Reason for impact
6d.
Stream name
6e.
Buffer
mitigation
required?
6f.
Zone 1
impact
(square
feet)
6g.
Zone 2
impact
(square
feet
B1 P
Clearing for construction.
Neuse River
Yes
1,212.89
806.9
B2 P
Clearing for construction.
Neuse River
Yes
1,205.47
803.62
B3 T
Clearing for construction.
Neuse River
No
1,917.94
1,086.76
B4 T
Clearing for construction.
Neuse River
No
2,025.25
1,029.45
B5 T
Clearing for construction.
Neuse River
No
2,076.6
1,384.51
B6 T
Neuse River
No
1,762.63
1,073.48
6h. Total Buffer Impacts:
10,200.78
6,184.72
61. Comments: The permanent riparian buffer impacts associated with this project are within an existing sewer line easement. Temporary impacts
were calculated for both Zones 1 and 2 within the limits of disturbance and will not require mitigation.
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 PCN Narrative.
1 b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques.
See PCN Narrative.
2.
Compensatory Mitigation for Impacts to Waters of the U.S. or Waters of the State
2a.
Does the project require Compensatory Mitigation for
impacts to Waters of the U.S. or Waters of the State?
❑ Yes ❑X No
2b.
If yes, mitigation is required by (check all that apply):
❑ DWQ ❑ Corps
2c.
If yes, which mitigation option will be used for this
project?
❑ Mitigation bank
El Payment to in -lieu fee program
❑ Permittee Responsible Mitigation
3.
Complete if Using a Mitigation Bank
3a.
Name of Mitigation Bank:
3b.
Credits Purchased (attach receipt and letter)
Type: Choose one
Type: Choose one
Type: Choose one
Quantity:
Quantity:
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:
linear feet
4c.
If using stream mitigation, stream temperature:
Choose one
4d. Buffer mitigation requested (DWQ only):
9,670.86 square feet
4e. Riparian wetland mitigation requested:
acres
4f.
Non - riparian wetland mitigation requested:
acres
4g.
Coastal (tidal) wetland mitigation requested:
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.
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
❑X Yes ❑ 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
Clearing for sewer construction
and sewer easement.
2,418.36
3 (2 for Catawba)
7,255.08
Zone 2
Clearing for sewer construction
and sewer easement.
1,610.52
1.5
2,415.78
6f. Total buffer mitigation required:
9,670.86
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).
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
1a.
Does the project include or is it adjacent to protected riparian buffers identified
❑X Yes ❑ No
within one of the NC Riparian Buffer Protection Rules?
1 b.
If yes, then is a diffuse flow plan included? If no, explain why.
This
project is constructing a sewer siphon; no new impervious surfaces will be generated.
❑ Yes ❑X No
2.
Stormwater Management Plan
2a.
What is the overall percent imperviousness of this project?
0
2b.
Does this project require a Stormwater Management Plan?
❑ Yes ❑X No
2c.
If this project DOES NOT require a Stormwater Management Plan, explain why:
This
project is constructing a sewer siphon; no new impervious surfaces will be generated.
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
❑ NSW
3b.
Which of the following locally - implemented stormwater management programs
❑ USMP
apply (check all that apply):
❑ Water Supply Watershed
❑ Other:
3c.
Has the approved Stormwater Management Plan with proof of approval been
❑ Yes X❑ 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
❑ Other:
4b.
Has the approved Stormwater Management Plan with proof of approval been
❑ Yes ❑X 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
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
❑ Yes Q 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 0 No
or Riparian Buffer Rules (15A NCAC 2B .0200)?
2b. Is this an after - the -fact permit application?
❑ Yes 0 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
❑x 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.
The design process for this improvement is based on growth projections for the service area for the planning horizon year 2035 and uses a 10 -year
design storm which is the same design parameter as the greater Raleigh collection system. Secondary and cumulative impacts are expected due to
increased development within the service area. The alignment improvements are intended to reduce strain on the existing collection and conveyance
systems as a result of rapid increases in population size and an already aging and deteriorating system.
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.
The flows from this area are ultimately conveyed to the Neuse River Wastewater Treatment Plant. The Neuse River Wastewater Treatment Plant is an
advanced, or tertiary treatment, plant with the capacity to treat 60 million gallons per day and treats an average of 44 million gallons per day. The City
of Raleigh is undertaking a project to expand the facility's capacity from 60 million gallons per day to 75 million gallons per day. Advanced or tertiary
treatment means that the wastewater undergoes three stages of treatment. Primary treatment is where the debris, sand, heavy organic solids, grease,
and oils are removed from the wastewater. In secondary treatment, a biological process is undertaken where microorganisms convert the ammonia
and nitrogen to nitrogen gas. The microorganisms are then removed from the treated water and returned to the biological process. In this facility,
advanced treatment is the process of filtering the water and disinfecting it using ultraviolet (UV) light before returning it to the Neuse River.
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 0 N
habitat?
5b. Have you checked with the USFWS concerning Endangered Species Act
❑ Yes 0 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?
North Carolina Natural Heritage Program Database; USFWS Ecological Services - Wake County Protected Species List
6. Essential Fish Habitat (Corps Requirement)
6a. Will this project occur in or near an area designated as essential fish habitat?
❑ Yes ❑X No
6b. What data sources did you use to determine whether your site would impact Essential Fish Habitat?
NOAA's National Marine Fisheries Service database
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
❑ Yes 0 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?
North Carolina State Historic Preservation Office Database
8. Flood Zone Designation (Corps Requirement)
8a. Will this project occur in a FEMA- designated 100 -year floodplain?
❑X Yes ❑ No
Bb. If yes, explain how project meets FEMA requirements:
The entire project lies within the FEMA 100 year floodplain. Because the outfall will be installed below existing grade and original slope and contour
will be restored, no impacts to FEMA floodplains are anticipated.
8c. What source(s) did you use to make the floodplain determination?
NC Floodplain Mapping Program, Wake County GIS Data
Dennis Lassiter
)
Applicant/Agent's Printed Name
Date
Applicant/ gent's Signature
(Agent's signature is valid only If an authorization
letter from the applicant is provided.)
Page 10 of 10

Supplemental Information for Pre- Construction Notification (PCN) Form
Richland Creek Interceptor Under Neuse River
PCN Narrative
Richland Creek Interceptor under Neuse River
For City of Raleigh Public Utilities Department
Nationwide Permit 12
Pre - Construction Notification
Name and Address of the Applicant:
City of Raleigh Public Utilities Department
c/o Dennis H. Lassiter
PO Box 590
Raleigh, NC 27602
Page 1 of 3

Supplemental Information for Pre- Construction Notification (PCN) Form
Richland Creek Interceptor Under Neuse River
A. Applicant Information
3a. Names on Recorded Deed:
B. Project Information and Prior Project History
1a. Property identification no. (tax PIN or parcel IM See table above -Owner Information
3a. Describe the existing conditions on the site and the general land use in the vicinitu of the
project at the time of this application:
The Town of Wake Forest and City of Raleigh are proposing sanitary sewer improvements within
an existing sewer easement in Wake Forest North Carolina. Most of the proposed work is within
an already existing permanent easement for the currently existing sewer alignment. The
proposed project is located off Falls River Avenue. Temporary construction access will be
permitted down an existing greenway and continue across the Neuse River up an existing sewer
easement to Forest Shadows Lane.
3d. Explain the purpose of the proposed project:
The Town of Wake Forest has experienced a threefold increase in its population in the past 10
years. This rapid increase in population, coupled with an aging and deteriorating collection
system, has placed a considerable strain on the area's wastewater collection and conveyance
system. Modeling runs in the Richland Creek Basin for the 2 -year and 10 -year design storms have
consistently predicted the potential for surcharging and sanitary sewer overflow (SSOs). The
primary need for this project is to provide adequate wastewater collection and conveyance
facilities to protect the environment and to meet the demands of a rapidly growing population.
Page 2 of 3
Deed Book and
Responsible
Names) on recorded deed
PIN
Page No.
Party
Address
PO BOX 590 Raleigh, NC
CITY OF RALEIGH
1739054931
008340@02294
27602 -0590
PO BOX 590 Raleigh, NC
CITY OF RALEIGH
1729957247
008340@02295
7602 -0591
HANSON AGGREGATES OF
2310 Parklake Dr NE Ste 550
SOUTHEAST LLC
1739341240
-E-
Atlanta, GA 30345 -2911
BEDFORD AT FALLS RIVER MASTER
6739 Falls of Neuse Rd
ASSN INC
1739041449
013092@02409
Raleigh, NC 27615 -5305
VILLAS AT BEDFORD AT FALLS
RIVER HOMEOWNERS
PO BOX 97243 Raleigh, NC
ASSOCIATION INC
1739041244
011134@00506
27624 -7243
BEDFORD AT FALLS RIVER MASTER
6739 Falls of Neuse Rd
ASSN INC
1739035779
0128950'02214
Raleigh, NC 27615 -5305
BEDFORD AT FALLS RIVER MASTER
6739 Falls of Neuse Rd
ASSN INC
1739134227
012895@02214
Raleigh, NC 27615 -5305
B. Project Information and Prior Project History
1a. Property identification no. (tax PIN or parcel IM See table above -Owner Information
3a. Describe the existing conditions on the site and the general land use in the vicinitu of the
project at the time of this application:
The Town of Wake Forest and City of Raleigh are proposing sanitary sewer improvements within
an existing sewer easement in Wake Forest North Carolina. Most of the proposed work is within
an already existing permanent easement for the currently existing sewer alignment. The
proposed project is located off Falls River Avenue. Temporary construction access will be
permitted down an existing greenway and continue across the Neuse River up an existing sewer
easement to Forest Shadows Lane.
3d. Explain the purpose of the proposed project:
The Town of Wake Forest has experienced a threefold increase in its population in the past 10
years. This rapid increase in population, coupled with an aging and deteriorating collection
system, has placed a considerable strain on the area's wastewater collection and conveyance
system. Modeling runs in the Richland Creek Basin for the 2 -year and 10 -year design storms have
consistently predicted the potential for surcharging and sanitary sewer overflow (SSOs). The
primary need for this project is to provide adequate wastewater collection and conveyance
facilities to protect the environment and to meet the demands of a rapidly growing population.
Page 2 of 3

Supplemental Information for Pre- Construction Notification (PCN) Form
Richland Creek Interceptor Under Neuse River
The purpose of the proposed project is to address a potential service bottleneck at an existing
sewer siphon that crosses the Neuse River and ties into the Richland Creek Interceptor. Because
projected growth rates indicate the potential for SSOs near this bottleneck, the proposed
construction of a new double barrel 16 -inch DIP siphon pipes will alleviate the bottleneck and
provide adequate wastewater conveyance for the service area. After construction, the existing
siphon will remain in place to accommodate overflow capacity.
3e. Describe the overall project in detail, including the type of equipment to be used:
The proposed project is located off Falls River Avenue. Temporary construction access will be
permitted down an existing greenway and continue across the Neuse River up an existing sewer
easement to Forest Shadows Lane. Proposed work includes the installation of 125.4 LF of double -
barrel 16 -inch DIP siphon pipes crossing the Neuse River. Additional work includes: installing
204.7 LF of double barrel 16 -inch DIP , replacing 249.9 LF of existing 24" DIP with 36" DIP,
installing 391.2 LF of 36" DIP, removing 46.2 LF of 10" PVC pipe, removing and replacing 126.2
square yards of existing greenway pavement, and installing several necessary connection pipes,
manholes, and precast vaults. The contractor will install sediment and erosion control measures,
as shown in the plans, and coordinate with the Raleigh Parks and Recreation Department
regarding the temporary closing of the greenway. For the construction of the siphon, a cofferdam
work plan will be prepared by the contractor. The work plan will be designed and implemented
to maintain the uninterrupted flow of water in the Neuse River during construction. This
approach allows for excavation in the water course under dry conditions and will be designed to
complete the crossing in a two -stage process, where one half of the siphon is constructed at a
time. The cofferdam will not be removed until construction of the double siphon and backfilling
and restoring of the original river bottom contours have been completed to restore unimpeded
stream flow. The contractor will coordinate daily with the Falls Lake Dam operator with USACE
to understand any unusual dam releases that may impact the work area. The intent of the
design is to leave the existing siphon in service while the new 36 "main and double barrel siphon
is constructed. After construction, the existing siphon will remain in place to accommodate
overflow during peak flow conditions.
D. Impact Justification and Mitigation
1a. & 1b.: Avoidance and Minimization: Specifically describe measures taken to avoid or
minimize the proposed impacts in designing project and through construction techniques.
To minimize impacts to surface water resources during project construction and maintenance: 1)
an approved erosion and sedimentation control plan will be included in the project's design
plans; 2) the double barrel siphons will be installed by open trench construction and comply with
applicable USACE and DWQ permits; 3) the contractor will prepare a cofferdam work plan and
be responsible for maintaining the uninterrupted flow of water in the Neuse River (the dam will
allow for excavation under dry conditions to complete the crossing in a two stage process- one
half at a time); 4) all ground contours will be returned to their original condition; 5) insecticides
and herbicides will not be used within 100 feet of perennial streams, within 50 feet of intermittent
streams, or within wetlands and floodplains associated with those streams.
Ongoing on -site construction inspections will ensure that construction contractors are following
all DENR- approved plans.
Page 3 of 3

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A �
NCDEN
North Carolina Department of Environment and Natural Resources
Pat McCrory Michael Ellison, Director John E. Skvarla, III
Governor Ecosystem Enhancement Program Secretary
August 4, 2014
Dennis Lassiter
City of Raleigh
PO Box 590
Raleigh, NC 27602 Expiration of Acceptance: February 4, 2015
Project: Richland Creek Interceptor Under Neuse River
County: Wake
The purpose of this letter is to notify you that the North Carolina Ecosystem Enhancement Program (NCEEP) 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 NCEEP will be approved by the permit issuing agencies as mitigation
for project impacts. It is the responsibility of the applicant to contact these agencies to determine if payment to the NCEEP 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 SL 2009 -337: An Act to Promote the Use of Compensatory Mitigation Banks as amended by
S.L. 2011 -343.
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 NCEEP. Once NCEEP 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 to NCEEP 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 NCEEP, the impacts that may require compensatory mitigation
are summarized in the following table. The amount of mitigation required and assigned to NCEEP for this impact is determined by
permitting agencies and may exceed the impact amounts shown below.
Upon receipt of payment, EEP will take responsibility for providing the compensatory mitigation. The mitigation will be performed
in accordance with the N.C. Department of Environment and Natural Resources' Ecosystem Enhancement Program In -Lieu Fee
Instrument dated July 28, 2010.
Thank you for your interest in the NCEEP. If you have any questions or need additional information. please contact Kelly Williams at
(919) 707 -8915.
Sincerely,
Jam B Stanfill
Asset Management Supervisor
cc: Karen Higgins, NCDWR Wetlands /401 Unit
Davis Shaeffer, USAGE- Raleigh
Brad Breslow, agent
File
1652 Mail Service Center, Raleigh, North Carolina 27699 -1652
Phone: 919 - 707 -89761 Internet: www.ncdenr.gov
An Equal Opportunity 1 Affirmative Action Employer—Made in part by recycled paper
River
CU
Stream (feet)
Wetlands (acres)
Buffer I
Buffer II
Basin
Location
(Sq. Ft.)
(Sq. Ft.)
Cold
Cool
Warm
Riparian
Non - Riparian
Coastal Marsh
Impact
Neuse
03020201
0
0
0
0
0
0
Up to
Up to
7,256
2,416
Upon receipt of payment, EEP will take responsibility for providing the compensatory mitigation. The mitigation will be performed
in accordance with the N.C. Department of Environment and Natural Resources' Ecosystem Enhancement Program In -Lieu Fee
Instrument dated July 28, 2010.
Thank you for your interest in the NCEEP. If you have any questions or need additional information. please contact Kelly Williams at
(919) 707 -8915.
Sincerely,
Jam B Stanfill
Asset Management Supervisor
cc: Karen Higgins, NCDWR Wetlands /401 Unit
Davis Shaeffer, USAGE- Raleigh
Brad Breslow, agent
File
1652 Mail Service Center, Raleigh, North Carolina 27699 -1652
Phone: 919 - 707 -89761 Internet: www.ncdenr.gov
An Equal Opportunity 1 Affirmative Action Employer—Made in part by recycled paper