20160722 Ver 1_More Info Received_20160921

McGill
A S S O C I A T E S
Sept. 15, 2016 O po
�
TT
Wilmington Regulatory Field Office
US Army Corps of Engineers
69 Darlington Avenue
Wilmington, NC 28403
Attn: Tom Charles
RE: Town of Saint Pauls — Sewer Improvements
Related to Sanderson Farms — Project Revisions
Robeson County, NC
NWP #12 & #13
DWR# 16-0722
Dear Mr. Charles:
Please find enclosed revised PCN sections and supporting maps for the July 2016
submitted Nationwide Permit application for the Town of Saint Pauls — Sewer Improvements
Related to Sanderson Farms project in Robeson County, NC. Based on negotiations with the US
Army Corps of Engineers and project design changes, we have been able to eliminate permanent
forested wetland impacts and reduce total wetland impacts from 0.08 -acres (temporary and
permanent) to 0.06 -acre (temporary). A permanent maintenance corridor will not be
maintained through forested wetlands; some portions of the maintenance corridor will be
located in previously existing herbaceous wetlands. All forested wetlands cleared during the
sewer line replacement process will be allowed to re -vegetate and re-establish natural
conditions.
Please find included: revised Project Description, sections 3a — 3e; revised Proposed
Impacts Inventory, Section 2: revised Impact Justification and Mitigation, Section la P. 1h:
revised Site Plan, Sheet 2; revised Impact Map, Sheet 3.
Cc:
Sincerely,
McGill Associates, P.A.
Joh C. Vilas
Program Services Manager- Environn
NCDEQ, DWR — Main Office
Town of Saint Pauls — Gerard Weindel, Mayor
McGill Associates, P.A. — David Honeycutt, PE
McGill Project # 16.04001
E n v i r o n m e n t a l a P l a n n i n g • F i n a n c e
McGill As.sariates P.A. • 468 New Alarket Bled. Ste_ B. Boone, North Carolina 28607
office I828J 386-1920 • Fax. [phone]

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 Town of St. Pauls - Sewer Improvements Related to Sanderson Farms (Project) is completing upgrades and
maintenance actions to the existing wastewater system in order to accommodate the extension of service to the new
Sanderson Farms Processing Plant. There are two areas (Project Site) of wastewater system improvements which
include work within jurisdictional Waters of the U.S.: (1) sewer line replacement work at the entrance to the Town of
St. Pauls wastewater treatment plant (WWTP) that will temporarily impact herbaceous and forested wetlands, as well
as, a perennial tributary to Big Marsh Swamp: (2) stream bank stabilization work on a perennial tributary to Big Marsh
Swamp adjoining the Town of St. Pauls - No. 1 Pump Station. Each of these project areas, WWTP and No.1 Pump
Station, are on separate properties under the ownership of the Town of St. Pauls. The WWTP property is located off
S. Elizabeth Street in a natural bottomland forest surrounded by wetland areas with a portion of the proiect area set
within the 100 -year floodplain to Big Marsh Swamp (see WWTP Existing Conditions Map -Figure 1). The No. 1 Pump
Station is located beside W. Broad Street in a mostly urban and single-family residential setting: an area of
herbaceous wetlands is adjacent to the site (see No.1 Pump Station Existing Conditions Map -Figure 4).
3b.
List the total estimated acreage of all existing wetlands on the property:
WWTP property: 0.6 -ac. (within the Project Site): No.1 Pump Station property: 0.05 -ac. (within the Project Site).
3c.
List the total estimated linear feet of all existing streams (intermittent and perennial) on the property:
WWTP property: 100 -linear feet of UT-Biq Marsh Swamp, perennial (within the Project Site).
No.1 Pump Station property: 85 -linear feet of UT-Biq Marsh Swamp, perennial.
3d.
Explain the purpose of the proposed project:
There are two purposes of the Project: (1) to make improvements to the existing municipal wastewater collection
system which would permit the Town of St. Pauls to provide service to the new Sanderson Farms Processing Plant:
(2) stabilize an eroded section of stream bank that has exposed a sewer line manhole and threatens wastewater
infrastructure at the No. 1 Pump Station.
Town of St. Pauls -3 -
Sewer Improvements Related to Sanderson Farms
PCN Application July 2016
Revised Sept, 15, 2016

3e. Describe the overall project in detail, including the type of equipment to be used:
Project work at the Town of St. Pauls WWTP under a Nationwide Permit #12:
1. Replacement of 12 -inch vitrified clay pipe (VCP) sewer interceptor and brick manholes with new 12" Ductile Iron
Pipe (DIP) and new manholes: a total of 629 -linear feet of DIP will be installed between Elizabeth Street and the
tie-in at the WWTP (SSMH #1 — SSMH #5). Replacement sewer line will be installed in a 3 -foot wide trench with
2.5 -feet and 4 -feet of separation from the existing line. Existing sewer lines and manholes will be abandoned in
place following new line connection (see WWTP Site Plan -Sheet 2).
2. Replacement DIP sewer line installation will traverse the edge of Wetland -1W, a mixed herbaceous and forested
wetland (see WWTP Impact Map -Sheet 3). Trenching and line clearing along the edge of Wetland -1W will result
in a total of 0.06 -acres of temporary wetland impacts (Wetland Impact W-1): approximately 0.02 -acres of forested
wetlands will be cleared during sewer line installation (included in Wetland Impact W-1). Wetland soils will be
side -cast and will be used to refill the trench following line installation. Disturbed wetland areas will be stabilized
with temporary erosion control seed mix and over -seeded with native wetland seed mix, covered with straw. No
change in surface topography or drainage patterns will occur as a result of trenching. Approximately 150 -linear
feet of line trenching will occur in the 100 -year floodplain: no change in surface topography will occur as a result
of trenching. A permanent maintenance corridor will be maintained along the south side of the new line. The
permanent maintenance corridor will not be located in forested wetlands, instead forested wetlands will be
allowed to re -vegetate and re-establish a natural shrub-scrub/forested condition. Maintenance of the corridor will
include periodic mowing of previously existing herbaceous wetland areas between manholes.
3. New DIP sewer line will cross an unnamed tributary to Big Marsh Swamp (see WWTP Impact Map -Sheet 3). Line
installation will be completed by open cut trenching across the narrow stream channel. 15 -linear feet of temporary
excavation and fill stream impacts (S-1) will result from line installation and flow diversion measures. Sewer line
work at the stream crossing will be performed in the dry by utilizing a piped or pump -around diversion measure.
Following work in the stream, the stream bed will be returned to its original elevation and grade: stream banks will
be returned to the original slope and elevation. Temporary fill associated with the diversion measure will be
removed from the stream channel following work. Disturbed stream banks and riparian areas will be stabilized
using biodegradable erosion control blankets and seeded with erosion control mix and over -seeded with native
riparian mix (see Stream Stabilization Detail).
Proiect work at the Town of St. Pauls No.1 Pump Station under a Nationwide Permit #13:
4. Eroding stream banks (refer to Existing Cross-sections) along an unnamed perennial tributary to Big Marsh
Swamp have exposed a sewer line manhole and threaten wastewater infrastructure at the No.1 Pump Station.
Proposed work includes permanently stabilizing the stream bank using a combination of boulder toe and
reinforced soil lifts (see Bank Stabilization Detail and Proposed Cross-sections). 50 -linear feet of permanent
stream impacts (S-2) will occur as a result of bank stabilization: pipe or pump around diversion measure will be
utilized to perform work in the dry with 10 -linear feet of temporary fill impact, stream impact S-3 (see No.1 Puma
Station Site Plan and Impact Map -Sheet 5). Boulder size will average 18-24" in diameter: a line of footer boulders
will be installed below the stream bed with a row for header boulders stacked on top. Stacked rows of 10" soil lifts
will be installed at a 1.5:1 slope above the boulder toe tying to the top bank elevation. Live stakes will be planted
at 2 -foot intervals in the soil lifts (live stake specifications shown on Bank Stabilization Detail). Disturbed riparian
areas will be stabilized following work with biodegradable erosion control blankets and seeded with erosion
control mix (see Stream Stabilization Detail). All disturbed riparian areas, including the soil lifts, will be seeded
with a native riparian mix. Stream bank stabilization work will be performed in the dry. Temporary fill associated
with the stream diversion measure will be removed from the stream channel following work.
Town of St. Pauls - 4 - PCN Application July 2016
Sewer Improvements Related to Sanderson Farms Revised Sept, 15, 2016

C. Proposed Impacts Inventory
1. Impacts Summary
1a. Which sections were completed below for your project (check all that apply):
® Wetlands ® Streams - tributaries ❑ 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.
2b.
2c.
2d.
2e.
2f.
Wetland impact
Type of jurisdiction
number —
Type of impact
Type of wetland
Forested
(Corps - 404, 10
Area of impact
Permanent (P) or
(if known)
DWQ — non -404, other)
(acres)
Temporary T
W1 [-]POT
Excavation
Mixed
Herbaceous &
® Yes
E] No
® Corps
E] DWQ
0.06
Bottomland Forest
W2 ❑ P ❑ T
❑ Yes
❑ Corps
❑ No
❑ DWQ
W3 ❑ P ❑ T
❑ Yes
❑ Corps
❑ No
❑ DWQ
W4 ❑ P ❑ T
❑ Yes
❑ Corps
❑ No
❑ DWQ
W5 ❑ P ❑ T
❑ Yes
❑ Corps
❑ No
❑ DWQ
W6 ❑ P ❑ T
❑ Yes
❑ Corps
❑ No
❑ DWQ
2g. Total wetland impacts
0.06
2h. Comments: Wetland Impacts will be temporary: areas of cleared forested wetlands will be allowed to re -vegetate following
installation.
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
Type of jurisdiction
Average
Impact
number -
(PER) or
(Corps - 404, 10
stream
length
Permanent (P) or
intermittent
DWQ — non -404,
width
(linear
Temporary (T)
(INT)?
other)
(feet)
feet)
S1 ❑ P ®T
Excavation/Fill
UT -Big Marsh
® PER
® Corps
4
15
Swamp
❑ INT
❑ DWQ
S2 ®P ❑ T
Stabilization
UT -Big Marsh
® PER
® Corps
7
50
Swamp
❑ INT
❑ DWQ
S3 ❑ PST
Fill
UT -Big Marsh
® PER
® Corps
7
10
Swamp
❑ INT
❑ DWQ
S4 ❑ P ❑ T
❑ PER
❑ Corps
❑ INT
❑ DWQ
S5 ❑ P ❑ T
❑ PER
❑ Corps
❑ INT
❑ DWQ
3h. Total stream and tributary impacts
75
3i. Comments:
Town of St. Pauls - 6 - PCN Application July 2016
Sewer Improvements Related to Sanderson Farms Revised Sept, 15, 2016

D. Impact Justification and Mitigation
1. Avoidance and Minimization
1a. Specifically describe measures taken to avoid or minimize the proposed impacts in designing project.
1) During the project design process looking at the layout of the replacement sewer line, site conditions were found
to be preventative in avoiding wetland impacts. An existing water line, sewer effluent outfall line, paved access
road and areas of forested wetlands are located south of the proposed line layout. No alternative is available to
the current layout for the sewer line replacement at the WWTP site.
2) Construction corridor minimized — reduced from 10 -feet to 5 -feet, at the WWTP site.
3) Locate the replacement sewer line as close as possible to the existing line to minimize clearing activities at the
WWTP site. The replacement sewer line was previously proposed to be offset 5 -feet from the existing sewer line,
which has been reduced to between 2.5 -feet and 4 -feet of separation.
4) Permanent maintenance corridor will not be expanded beyond existing, all wetland areas north of replacement
sewer line will be allowed to revegetate naturally at the WWTP site.
5) The sewer line replacement project at the WWTP site has gone through several design iterations in an effort to
minimize wetland impacts. Wetland impacts have been reduced from the previously proposed 0.08 -ac.
(permanent and temporary) amount to 0.06 -ac. (temporary) wetland impacts.
6) Monitor weather and perform work in wetlands and streams during dry periods, 48-hour rain -free window.
7) Use natural bank stabilization techniques at the No. 1 Pump Station project site.
8) Stream work will be performed in the dry through water diversion measure, pump around or piped, at both stream
impact location sites (S-1 and S-3).
b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques.
1) Trench width has been reduced from 4 -feet wide to a 3 -foot wide trench for the replacement sewer line at the
WWTP site.
2) Temporary fill in streams from water diversion measures will be removed following work. Following open cut
trenching across stream channel (S-1). disturbed stream channel will be restored to original grade and condition:
disturbed stream banks will be restored to original slope and elevation. Disturbed stream banks and riparian areas
will be stabilized with temporary erosion control blankets, erosion control seed mix and native riparian seed mix.
3) During sewer line trenching in wetland areas, soils will be side -cast to be used in refilling the trench. Wetland
surface topography and drainage patterns will not be altered following work. Disturbed wetlands will be stabilized
using native wetland seed mix and straw cover.
4) Anti -seep collars will be installed on new sewer lines through wetlands at the WWTP site to prevent draining or
altering wetland hvdroloov.
5) Following new sewer line installation within the 100 -year floodplain, topography will be restored to original grade
and elevation.
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 ® 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
ElPayment to in -lieu fee program
❑ Permittee Responsible Mitigation
Town of St. Pauls - 9 - PCN Application July 2016
Sewer Improvements Related to Sanderson Farms Revised Sept, 15, 2016

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SEWER SYSTEM IMPROVEMENTS
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IMPACT MAP
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DESI(.�NEI�I�� EC
RELATED TO SANDERSON FARMS
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ST.PAULS WASTE WATER
CADIJHI SM
OESI NHEVIEW °H
TOWN OF ST. PAULS
TREATMENT PLANT
CON5T REVIEW
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ROBESON COUNTY, NORTH CAROLINA
FILE NAME
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ENGIN E f: R I N G •PLANNING F I N A N C E
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