20221283 Ver 1_Southeast Farrington PCN request letter_9_16_2022_20220916

Smith
Pre -Construction Notification
To:
April Norton
U.S. Army Corps of Engineers
Raleigh Regulatory Field Office
3331 Heritage Trade Drive, Suite 105
Wake Forest, North Carolina 27587
From: Jason Hales — CDM Smith
Date: September 16th, 2022
Colleen Cohn
NC Division of Water Resources
Raleigh Regional Office
3800 Barrett Drive
Raleigh, NC 27609
Subject: Pre -Construction Notification
City of Durham - Southeast Farrington Sewer Improvements
Durham County, North Carolina
Action ID No. SAW-2022-00448
To April Norton,
On behalf of the City of Durham (City), CDM Smith Inc. (CDM Smith) is pleased to submit this pre -
construction notification (PCN) and supplemental information concerning the Southeast Farrington
Sewer Improvements project in Durham County, North Carolina (Figure 1). We are requesting
concurrence from the U.S. Army Corps of Engineers (USACE) that the activities proposed below may
proceed under a Nationwide Permit 58 and concurrence from the NC Division of Water Resources
(NCDWR) that the activities proposed below may proceed under an Individual Water Quality
Certification. We are also requesting a riparian buffer authorization in the Jordan Lake Watershed.
A pre filing meeting request was submitted on April 22nd, 2022 (confirmation e-mail attached).
Project Purpose and Need
Durham is one of the most rapidly growing cities in North Carolina. The increase in development
has presented the City with many challenges to upgrade their wastewater system. There has been
significant development in the Stagecoach Basin, which has resulted in increased wastewater flow
to the Massey Chapel Lift Station (LS), Fayetteville Road LS and Stagecoach LS (Figure 2). The
purpose of the project is to improve the infrastructure to manage the additional flows and continue
to provide wastewater treatment for the City's residents.

City of Durham - Southeast Farrington Sewer Improvements
Pre -Construction Notification
September 16th, 2022
Page 2
Project Description
To improve the sewer infrastructure the Massey Chapel LS will be abandoned, the Fayetteville Road
LS will be upgraded, and the Stagecoach LS will be replaced. A new gravity sewer line will be
installed to redirect wastewater flow from the abandoned Massey Chapel LS to the Fayetteville
Road LS. A larger gravity sewer line will replace an existing gravity sewer line flowing from the
Fayetteville Road LS to the Stagecoach Road LS.
The Massey Chapel LS is located on Massey Chapel Road, adjacent to Crooked Creek. The existing
station currently pumps into a 16-inch diameter force main that discharges into an 18-inch
diameter gravity sewer, which ultimately flows west to the Stagecoach LS. The Massey Chapel LS
will be removed from service. Approximately 2,550 feet of new 18-inch diameter gravity sewer will
be installed to the south from the abandoned Massey Chapel LS, connecting with an existing 18-inch
gravity sewer that flows to the Fayetteville Road LS.
The Fayetteville Road LS is located on the south side of the road Swift Creek Crossing and just west
of the stream Crooked Creek. The station currently pumps into a 16-inch diameter force main that
discharges into an 18-inch gravity sewer beginning on the west side of Fayetteville Road, northwest
of the intersection of Swift Creek Crossing and Fayetteville Road. The gravity sewer line then flows
to the Stagecoach LS. The Fayetteville Road LS will be improved and upgraded to provide additional
pumping capacity. The existing 18-inch gravity sewer between the Fayetteville Road LS and the
Stagecoach Road LS will be replaced with approximately 5,550 feet of 18-inch through 30-inch
gravity sewer.
The Stagecoach LS is located on the east side of NC Highway 751, southeast of the intersection of
Great Egret Way and NC Highway 751. The Stagecoach LS will be replaced with an upgraded facility
to provide additional pumping capacity.
The Southeast Farrington Sewer Improvements project includes the following components:
■ Demolition and abandonment of the existing Massey Chapel LS.
• Installation of approximately 2,550 linear feet of 18-inch diameter gravity sewer to abandon
the Massey Chapel LS.
• Improvements to the Fayetteville Road LS including:
• Pump Improvements to increase capacity to 4.0 MGD
• Vapor Phase Odor Control
• Magnetic Flow Meter, and Surge Relief valve vault improvements
• Below grade dry pit HVAC improvements
• Electrical and instrumentation improvements

City of Durham - Southeast Farrington Sewer Improvements
Pre -Construction Notification
September 16th, 2022
Page 3
■ Installation of approximately 5,550 linear feet of 18-inch through 30-inch gravity sewer
between the Fayetteville Road and Stagecoach Road Lift Stations.
■ Demolition and abandonment of the existing Stagecoach Road LS.
■ Construction of a new 10.5 MGD Stagecoach LS adjacent to the existing LS location.
■ Temporary facilities (including bypass pumping and temporary water) as required to
maintain service during construction and connection to the new facilities.
■ Grading, paving, erosion control, site cleanup, seeding, and testing of all installed sewer
infrastructure.
There are approximately 11.2 acres of ground disturbance planned. Construction will include work
along a new 40-foot wide sewer right-of-way for the installation of new 18-inch diameter gravity
sewer from the abandoned Massey Chapel LS to the existing 18-inch gravity sewer flowing to the
Fayetteville Road LS; work along an existing maintained 30-foot wide sewer right-of-way for the
replacement of existing 18-inch gravity sewer with 18-inch through 30-inch gravity sewer from the
Fayetteville Road LS 16-inch force main connection west of Fayetteville Road to Chancellors Ridge
Drive; and work along the NCDOT maintained right-of-way for the replacement of existing 18-inch
gravity sewer with 18-inch through 30-inch gravity sewer from Chancellors Ridge Drive to the
Stagecoach Road LS. More details regarding the proposed work are shown on the attached design
plan sheets.
The construction period is estimated to be approximately 18 months, with temporary wetland,
stream and buffer impacts in place for less than 90 days each. Each individual temporary impact
would be limited to a very short time, just enough to install or replace the gravity sewer lines.
Standard construction and pipe installation equipment such as cranes, excavators, dump trucks,
and similar vehicles would be used for the project. Proper erosion and sedimentation control
measures would be employed throughout the project.
Jurisdictional Features
Mr. Jason Hales of CDM Smith conducted a wetland delineation within the approximately 33.9-acre
Project Study Area (PSA) on April 14th, 15th, and 16th, 2021. Figures 3 through 6 show the USGS
topographic, USDA Soils survey, NWI wetland, and preliminary wetland boundary mapping for the
site. A preliminary jurisdictional determination (PJD) request for the delineation was submitted to
the USACE on February 24th, 2022. An e-mail verifying the delineation was received from the USACE
on April 4th, 2022 (attached). Fourteen wetland areas, four perennial streams, and two intermittent
streams were identified during the delineation (Figure 6). Table 1 provides a summary of the
delineated features within the PSA. A buffer determination request for the project area was
submitted to NCDWR on July 1st, 2022 and a buffer determination letter from NCDWR was received
on August 2nd, 2022 (attached).

City of Durham - Southeast Farrington Sewer Improvements
Pre -Construction Notification
September 16th, 2022
Page 4
Table 1. Summary of potential waters of the United States in the PSA
Feature
name/number
Wetland/Stream
Type
Latitude
Longitude
Cowardin
class
Size of resource in
study area (acre)
WA
Wetland
35.890117
-78.957190
PFO/PEM
0.24
WB
Wetland
35.887285
-78.956799
PFO
0.20
WC
Wetland
35.886879
-78.957212
PFO/PEM
0.12
WD
Wetland
35.888199
-78.957455
PFO/PEM
0.05
WE
Wetland
35.885351
-78.956392
PFO
0.03
WF
Wetland
35.882579
-78.955363
PFO
0.07
WG
Wetland
35.881716
-78.953621
PFO
0.02
WH
Wetland
35.881286
-78.952415
PFO
0.10
WI
Wetland
35.880879
-78.950657
PFO
0.86
WI
Wetland
35.879414
-78.943594
PFO
0.02
WK
Wetland
35.898853
-78.936665
PFO
0.10
WL
Wetland
35.897956
-78.936320
PFO
0.08
WM
Wetland
35.896473
-78.936115
PFO
0.08
WN
Wetland
35.893742
-78.937511
PFO
2.93
SA
Perennial
35.887061
-78.956923
R2UBH
135 LF (0.04 acre)
SB
Intermittent
35.885372
-78.956402
R4SBC
80 LF (0.01 acre)
SB
Perennial
35.885472
-78.956732
R3UBH
35 LF (0.01 acre)
SC
Intermittent
35.880976
-78.951426
R4SBC
487 LF (0.05 acre)
SC
Perennial
35.881303
-78.952684
R3UBH
306 LF (0.06 acre)
SD
Perennial
35.896756
-78.936233
R2UBH
1,459 LF (0.71 acre)
lf: linear feet
Proposed Impacts
Permanent and temporary impacts to wetlands, streams and buffers would be necessary to
improve the sewer infrastructure serving the sewerage basin's customers. The proposed wetland,
stream and buffer impacts are described below, summarized in Tables 2, 3 and 4 below and shown
on the attached impacts plan sheets.
Wetland Impacts
There are 0.003 acres of proposed permanent wetlands impacts for fill associated with a planned
gravel driveway access to the Stagecoach LS and the rerouting of a 20-inch force main sewer line
from the existing Stagecoach LS (Impacts plan sheet C-400, Impact Number W2).
There are 0.015 acres of proposed permanent wetlands impacts for land clearing, conversion and
gravity line installation along a small realignment of the existing maintained 30-foot wide sewer
right-of-way between the Fayetteville Road LS 16-inch force main connection west of Fayetteville

City of Durham - Southeast Farrington Sewer Improvements
Pre -Construction Notification
September 16th, 2022
Page 5
Road to Chancellors Ridge Drive (Impacts plan sheet C-405, Impact number W6). This area will be
cleared of vegetation, used for the replacement of the existing 18-inch gravity sewer with 18-inch
through 30-inch gravity sewer and maintained for future access.
There are 0.423 acres of proposed permanent wetlands impacts for land clearing, conversion and
gravity line installation within a planned 20-foot wide permanent maintenance corridor from the
abandoned Massey Chapel LS to the existing 18-inch gravity sewer line flowing to the Fayetteville
Road LS (Impacts plan sheets C-300, C-301 and C-302, Impact numbers W9 and W12). There are
0.005 acres of proposed wetland impacts for fill to protect the gravity sewer installation from
erosion along this portion of the alignment (Impacts plan sheet C-302, Impact number W10). These
areas will be cleared of vegetation, used for the installation of the new 18-inch gravity sewer and
maintained for future access.
There are a total of 0.446 acres of proposed permanent wetland impacts.
There are 0.010 acres of proposed temporary wetlands impacts for construction access to replace
the Stagecoach LS and to install a new 30-inch gravity sewer line coming from the Fayetteville Road
LS (Impacts plan sheet C-400, Impact number W1). This area will continue to be maintained for
future access.
There are 0.095 acres of proposed temporary wetlands impacts for construction access and gravity
line installation along the existing maintained 30-foot wide sewer right-of-way between the
Fayetteville Road LS 16-inch force main connection west of Fayetteville Road to Chancellors Ridge
Drive (Impacts plan sheets C-404 and C-405, Impact numbers W3, W4 and W5). These areas will be
used for the replacement of the existing 18-inch gravity sewer with 18-inch through 30-inch gravity
sewer and continue to be maintained for future access.
There are 0.014 acres of proposed temporary wetlands impacts for construction access and gravity
sewer installation within the maintained easement for the existing 18-inch gravity sewer flowing to
the Fayetteville Road LS. This impact is located at the connection point of the new 18-inch gravity
sewer flowing from the abandoned Massey Chapel LS with the existing 18-inch gravity sewer
flowing to the Fayetteville Road LS (Impacts plan sheet C-300, Impact number W7).
There are 0.386 acres of proposed temporary wetlands impacts for construction access and land
clearing within planned temporary construction corridors from the abandoned Massey Chapel LS to
the existing 18-inch gravity sewer flowing to the Fayetteville Road LS (Impacts plan sheets C-300,
C-301 and C-302, Impact numbers W8 and W11). These areas will be cleared of vegetation and used
for construction access.
There are a total of 0.505 acres of proposed temporary wetland impacts.
In wetland areas used for the gravity line installation the material from the trench will be used to
back fill and will be returned to the trench after the sewer line installation. Impacted wetland areas
within the permanent maintenance corridors will be seeded with native wetland herbaceous
species and then be maintained as herbaceous wetlands for future access. Impacted wetland areas

City of Durham - Southeast Farrington Sewer Improvements
Pre -Construction Notification
September 16th, 2022
Page 6
outside of the planned permanent maintenance corridors will be seeded with native wetland seed
mix and allowed to revegetate naturally with woody species.
There are a total of 0.951 acres of proposed permanent and temporary wetland impacts.
Table 2. Wetland Impacts Summary
Impact
Number
Impact
Type
Wetland
Name
Wetland
Type
Impact Reason
L
Impact
Size
(acres)
W1
Temporary
WA
Emergent
Construction access, gravity
sewer installation
0.010
W2
Permanent
WA
Emergent
Fill, Stagecoach lift station
access, force main
installation
0.003
W3
Temporary
WH
Emergent
Construction access, gravity
sewer replacement
0.009
W4
Temporary
WI
Emergent
Construction access, gravity
sewer replacement
0.055
W5
Temporary
WI
Emergent
Construction access, gravity
sewer installation
0.031
W6
Permanent
WI
Forested
Land clearing, conversion,
gravity sewer installation
0.015
W7
Temporary
WN
Emergent
Construction access, gravity
sewer installation
0.014
W8
Temporary
WN
Forested
Construction access, land
clearing
0.371
W9
Permanent
WN
Forested
Land clearing, conversion,
gravity sewer installation
0.407
W10
Permanent
WM
Forested
Fill, land clearing, gravity
sewer installation
0.005
W11
Temporary
WL
Forested
Construction access, land
clearing
0.015
W12
Permanent
WL
Forested
Land clearing, conversion,
gravity sewer installation
0.016
Total Permanent Wetland Impacts
0.446
Total Temporary Wetland Impacts
0.505
Total Combined Wetland Impacts
0.951

City of Durham - Southeast Farrington Sewer Improvements
Pre -Construction Notification
September 16th, 2022
Page 7
Stream Impacts
There are 10-linear feet of proposed temporary stream impacts for construction access and
dewatering within the existing maintained 30-foot wide sewer right-of-way from the Fayetteville
Road LS 16-inch force main connection west of Fayetteville Road to Chancellors Ridge Drive
(Impacts plan sheet C-404, Impact number S1). There are a total of 10-linear feet of proposed
temporary stream impacts.
The stream bed in areas of proposed temporary stream impacts will be restored to pre -project
elevations and widths using natural stream bed material. Temporarily impacted stream banks will
be restored through seeding and woven coir fiber mat and then be maintained for future
maintenance access. All work in or adjacent to streams will be conducted so that the flowing stream
does not come in contact with the disturbed area (typical detail shown on sheet CD-11).
There are a total of 10-linear feet of proposed temporary stream impacts.
Table 3. Stream Impacts Summary
Impact
Number
Impact
Type
Stream
Name
Stream
Type
Impact
Reason
Average
Stream
Width
(feet)
Impact
Length
(lf)
(48-
inch
line/30
-inch
line)
Impact
Size
(sgft)
S1
Temporary
SC
Intermittent
Construction
access,
dewatering
4
10
38
Total Permanent Stream Impacts
0
0
Total Temporary Stream Impacts
10
38
Total Combined Stream Impacts
10
38
lf: linear feet; sgft: square feet

City of Durham - Southeast Farrington Sewer Improvements
Pre -Construction Notification
September 16th, 2022
Page 8
Buffer Impacts
There are 1,518-square feet of proposed permanent buffer impacts to Zone 2 for installation of the
new 18-inch diameter gravity sewer line from the abandoned Massey Chapel LS south to the
existing 18-inch gravity sewer that flows to the Fayetteville Road LS. Permanent buffer impacts in
this area are for land clearing and gravity sewer line installation within the proposed 20-foot wide
permanent maintenance corridor. Proposed buffer impacts are located near the connection point
with the existing 18-inch gravity sewer that flows to the Fayetteville Road LS (Impacts plan sheet C-
300, Impact number B3). There are a total of 1,518-square feet of proposed permanent buffer
impacts.
There are 476-square feet of proposed temporary buffer impacts to Zone 1 (Impacts plan sheet C-
300, Impact number B2) and 401-square feet of proposed temporary buffer impacts to Zone 2
(Impacts plan sheet C-300, Impact number B1) for installation of the new 18-inch diameter gravity
sewer line from the abandoned Massey Chapel LS south to the existing 18-inch gravity sewer that
flows to the Fayetteville Road LS. Temporary buffer impacts in these areas will be for construction
access and land clearing in areas outside of the proposed permanent maintenance corridor.
Following installation of the 18-inch diameter gravity sewer line temporarily impacted buffer areas
will be regraded, seeded and allowed to revegetate naturally with woody species. There are a total
of 877-square feet of proposed temporary buffer impacts.
There are a total of 2,395-square feet of proposed permanent and temporary permanent impacts.
Table 4. Buffer Impacts Summary
Impact
Number
Impact
Type
Stream
Name
Stream
Type
Impact Reason
Zone 1
Impact
(sqft)
Zone 2
Impact
(sqft)
B1
Temporary
SD
Perennial
Construction access,
land clearing
0
401
B2
Temporary
SD
Perennial
Construction access,
land clearing
476
0
B3
Permanent
SD
Perennial
Land clearing,
gravity sewer
installation
0
1518
Zone 1
Zone 2
Total Temporary Buffer Impacts
476
401
Total Permanent Buffer Impacts
0
1518
Total Combined Buffer Impacts
476
1919
sqft: square feet

City of Durham - Southeast Farrington Sewer Improvements
Pre -Construction Notification
September 16th, 2022
Page 9
Avoidance and Minimization
The proposed wetland, stream and buffer impacts have been kept to the minimum possible to allow
the sewer infrastructure installation. The planned limits of disturbance for construction were
reduced following the wetland delineation to reduce potential impacts. The planned permanent
maintenance corridors were reduced following the wetland delineation. The proposed impact
amounts would be a maximum of potential impacts to the features. The actual construction efforts
to replace and install the infrastructure will likely require less than the proposed totals. Actual land
clearing will be the minimum necessary to install the infrastructure. In wetlands, across stream
channels and in riparian buffers, stumps will be grubbed only as needed to install the
infrastructure, and remaining stumps will be cut off at grade level. The general stripping of topsoil
within wetlands along the construction corridor will be avoided. Heavy equipment working in
wetlands will be placed on mats to minimize soil disturbance and compaction. Work in wetlands
will be limited to only what is necessary to install the infrastructure.
Impacted wetland areas within the permanent maintenance corridors will be seeded with native
wetland herbaceous species and then be maintained as herbaceous wetlands for future access.
Impacted wetland areas outside of the planned permanent maintenance corridors will be seeded
with native wetland seed mix and allowed to revegetate naturally with woody species. All work in
or adjacent to streams will be conducted so that the flowing stream does not come in contact with
the disturbed area (typical detail shown on sheet CD-11). Temporarily impacted stream areas
within the maintained corridors will have the banks restored through regrading and seeding. The
stream bed in areas of proposed temporary stream impacts will be restored to pre -project
elevations and widths using natural stream bed material.
Impacted riparian buffer areas outside of the permanent maintenance corridors will be allowed to
revegetate naturally with woody species.
There will be no change in pre -construction contours of waters of the United States in temporarily
impacted areas. Erosion control matting that incorporates plastic mesh and/or plastic twine will
not be used along streambanks or within wetlands. All mechanized equipment operated near
surface waters shall be inspected and maintained regularly to prevent contamination of surface
waters from fuels, lubricants, hydraulic fluids, or other toxic materials. Construction shall be staged
in order to minimize the exposure of equipment to surface waters to the maximum extent
practicable.
Mitigation
Mitigation is proposed for 0.407 acres of wetland conversion associated with the planned 20-foot
wide permanent maintenance corridor from the abandoned Massey Chapel LS to the existing 18-
inch gravity sewer line flowing to the Fayetteville Road LS (Impacts plan sheets C-300 and C-301,
Impact number W9). Wetland credits would be purchased from the North Carolina Division of
Mitigation Services.

City of Durham - Southeast Farrington Sewer Improvements
Pre -Construction Notification
September 16th, 2022
Page 10
Threatened and Endangered Species
A biological assessment for potential effects to endangered or threatened species was submitted to
the US Fish and Wildlife Service (USFWS) Raleigh office for review on April 19th, 2022. An e-mail
confirming receipt of the review request was received on April 19th, 2022 (attached). The biological
assessment included a field reconnaissance survey for potential threatened and endangered species
and habitats conducted in the project area June 16th and 17th, 2021 and September 2nd, 2021. As of
the date of this request a response has not been received from the USFWS. The biological
assessment submitted on April 19th, 2022 recommended that the proposed action is not likely to
adversely affect any federally listed endangered or threatened species, their formally designated
critical habitat, or species currently proposed for listing at these sites; and that the requirements of
section 7(a) (2) of the Endangered Species Act have been satisfied for the project.
Historical and Cultural Resources
The NC State Historic Preservation Office (NCSHPO) HPOWEB 2.0 mapper
http://gis.ncdcr.gov/hpoweb/ was reviewed on August 1st, 2022. No historical or cultural sites
were shown mapped in the project area (Figure 7). The George Parish House is a surveyed only site
and is across NC 751 from the project area.
We look forward to working with you on the project. Please contact us with questions or if
additional information is required.
Sincerely,
Jason Hales
Wetland Scientist
CDM Smith
910-520-1832 [e-mail]
Attachments: Figure 1- Site Location Map
Figure 2 -Project Study Area Map
Figure 3 - USGS Topographic Map
Figure 4 - USDA NRCS Soil Survey Map
Figure 5 - USFWS NWI Map
Figure 6 - Preliminary Wetland Boundary Map
Figure 7 - NCSHPO GIS Data August 1st, 2022 Map
Proposed Impacts Plan Sheets
NCDWR Pre -filing Meeting Request received email dated April 22nd, 2022
USACE PJD e-mail conformation dated December 28th, 2020
NCDWR buffer determination letter from NCDWR dated August 2nd, 2022
USFWS request received e-mail April 19th, 2022
Agent Authorization Form
Design Plans July 2022