20231323 Ver 1_Resp to RFAI_20231213

December 13, 2023
N. Carmela Stock
U.S. Army Corps of Engineers
SAD Technical Regional Execution Center
100 W. Oglethope Ave.
Savannah, GA 31401
Re: USACE Project # SAC-2022-02166
Request for Additional Information Response
Applicant: Moses H Cone Memorial Hospital
Terracon Project No. EN237279
Ms. Stock,
om ierracon
On behalf of the Moses H Cone Memorial Hospital, Terracon is pleased to respond to
you request for additional information received October 24, 2023. Your comments,
and the response is provided below.
1. The impact numbers provided in the PCN table (i.e. 1, 4, S1, and S2) do not
correspond with impact exhibits (i.e. 1, 2, 3, 4). Please correct this.
Response: Please see the revised permit drawings with corrected impact
labels.
2. Exhibits are not detailed enough to review the project as proposed. Please
provide more detailed impact exhibits.
Response: Please see the revised permit drawings with additional project
impact information.
3. Temporary Wetland Impact 2: The total temporary impact reported is eight
square feet. The explanation provided is that a 6-inch line would extend across 16
linear feet of wetland. We understand the area of pipe to be installed would be
eight square feet, but it is not clear how would this line would be installed. Please
expand on this impact and review other impacts reported in the PCN to ensure
temporary disturbances (e.g. trench, construction corridor, permanent maintained
corridor, etc. are clear).
Response: The revised temporary wetland impact 2 will have a total
temporary impact of 247 square feet (0.006-acres) for temporary clearing
of vegetation and access for construction of the new forcemain sewer line.
The forcemain will be installed via a narrow open cut trench approximately
36" deep through the center of the 20-foot-wide sewer easement across

Comment Responses
CHMC Asheboro ■ Randolph County, North Carolina , erracon
December 13, 2023 ■ SAC-2022-02166
the 16 linear foot long wetland. The trench will be backfilled and grade
restored to the original conditions once the pipe is in place. The entire 20-
foot-wide sewer easement will be temporarily cleared of vegetation by
hand during construction but will be allowed to revegetate naturally.
4. How would construction access across, and beyond, Tributaries T2 and T3 be
accomplished?
Response: Temporary construction access across the tributaries will be
performed by installing a temporary, 18" for S1 and 20" inch for S2,
culvert in the tributary channel within the temporary access footprint for
equipment to drive across the tributaries. Stone will be installed over the
top of the culverts to create a temporary driving surface. Sheet 6 of 6 of
the revised permit drawings includes details of the temporary tributary
crossings. The culverts and associated materials be removed when
construction is complete and the grade will be restored to original
conditions. During construction BMPs such as the installation of silt fencing
will be utilized to prevent erosion.
5. The proposed sewer line extends south and off the impact exhibits. Please
provide an exhibit that demonstrates no additional impact would be required to
complete this project.
Response: See Sheet 2 of 6 of the revised permit drawings showing the
terminus of the new sewer line southeast of the site where it will tie into
an existing sanitary sewer manhole.
6. Please expand on the ultimate number and type of users this sewer line would
support. We need to establish whether independent utility exists for this project.
Response: The sewer line is designed to only support the proposed Cone
Health Medical Center development on the Cone Health parcel and no other
development is planned which would utilize the proposed sewer forcemain
line.
7. Wetland Impact 1, road construction, is limited to permanent impacts required
for the road footprint. Would any temporary disturbance be required to build this
road? Would any permanent wetland conversion (clearing) occur?
Response: Temporary impacts are not required for this road widening. The
access road currently exists but needs to be widened to support the
construction and maintenance of the proposed force main and pump

Comment Responses
CHMC Asheboro ■ Randolph County, North Carolina , erracon
December 13, 2023 ■ SAC-2022-02166
station. The permanent fill area indicated on the plans would be disturbed
for permanent fill to create a wider road surface and any trees within that
area to be filled will be removed as well prior to installing the fill. The
remaining wetlands are outside the limits of disturbance and not proposed
to be disturbed.
8) Because this sewer line is not a gravity -dependent utility, no -impact
alignments are likely possible to complete the project. Please discuss any
considerations made when planning this project.
Response: The public gravity sewer line that will receive flow from the
proposed force main is located south of McDowell Creek on the City
Asheboro Public School property and the pump station is located on the
north side of McDowell Creek. Therefore, all of the potential force main
alignments would cross McDowell Creek. Secondly, the forcemain
alignment options through the City of Asheboro Public School property
were limited based on proximity to buildings, students, athletic fields, etc.
and required the forcemain to cross I-74 in the proposed location. HDD and
jack and bore installation methods were considered but the access area in
the wetland needs to be cleared regardless of the installation method to
allow access during construction. Therefore, a narrow open cut trench was
determined to be most feasible method resulting in limited impacts.

Stimmel 601 N. Trade Street date: 12/04/2023 job #: 22-001
Suite 200
Winston Salem, NC project: Cone Health MedCenter Asheboro
Landscape Architecture 27101-2916
Civil Engineering Scale: 1" = 300' sheet 1 Of 6
g g P:336.723.1067
Stimmel Associates, PA Land Planning F: 336.723.1069 description: OVERALL WETLAND AND WOTUS IMPACTS
EXHIBIT
S ERO RD Q�
0 11 r
�' �� � � i it � ���\. i �•'
SEAL r:
1 027912 =
-i ; IMPACT #1 011,00 f.•:
12-6-2023
1 LNG 1
AHO�'��,.
I I
I11
I
III
;II
II
1 '
' II
'I II
' I
I /
II '
II
I I ��""��dd II
II
II
\\'.II
I I \\\
TEMPORARY IMPACT #S1 1 fix'
I 4 c
I \
II /
II
II i
!TEMPORARY II„
1;1
IMPACT #S2
/
/
O V' TEMPORARY
.�� IMPACT #4 it{
1 III
..NIA .
•MATCHLINE: STA: 14+00••

601 N. Trade S eet
Stimmel
20
Winston SalemtrNC
Landscape Architecture
27101-2916
Civil Engineering
StimmeI Associates, PA Land Planning
P:336.723.1067
F: 336.723.1069
EXHIBIT
date: 12/04/2023 job #: 22-001
project: Cone Health MedCenter Asheboro
scale: 1" = 200' sheet 2
Of 6
description: OVERALL WETLAND AND WOTUS IMPACTS
1
SEAL-
i I' = 027912
i �,'' ' �'• 12-6-2023
%Nil
�
w
A
MATCHLINE:ISTA:14+00
1 1 Z
' 11
�11
i�
1 1 e
11� � •
AN—_
PROP. 6" FORCEMAIN
PROP. 6" FORCEMAIN TIES INTO
EX. SANITARY SEWER MANHOLE.
END OF PROJECT.

601 N. Trade S eet
Stimmel
20
Winston SalemtrNC
Landscape Architecture
27101-2916
Civil Engineering
StimmeI Associates, PA Land Planning
P:336.723.1067
F: 336.723.1069
EXHIBIT
SPERO ROAD
date: 12/4/2023 job #: 22-001
project: Cone Health MedCenter Asheboro
scale: 1" = 30' sheet 3
description: WETLAND IMPACT #1
Of 6
,��tr,rrri�rrrr
SEAL
027912
\ 12-6-2023
12' WIDE GRAVEL PUMP STATION �'�� •':�/v �Q:����`
\ \ GG G 1 NE.•
ACCESS ROAD '•,�.��'•�•••HO�P��•`
�\ 1 rrrrrrrrr n rr►+�•
IMPACT #1
PUMP STATION ACCESS ROAD WETLAND IMPACTS:
SF (.013 AC) IMPACT WITHIN WETLAND W3 (PER THE
WETLAND AND WOTUS DELINEATION REPORT)
PERMANENT IMPACTS:
PERMANENT FILL
685
680
675
670 LJ
0+00
IMPACT #1: ACCESS ROAD PLAN AND PROFILE
SCALE: 1" = 100'
0 0 0 0 0 a
00000
000 V
V
0
�° ° \
Foo
0
0
0
o � <
o
o
o
1+00 2+00 3+00
685
680 I I a
II a
II
675 l
670
34"WHO

601 N. Trade Street
date: 12/04/2023 job #: 22-001
Stimmel
Suite 200
Winston Salem, NC
project: Cone Health MedCenter Asheboro
Landscape Architecture
27101-2916
Scale: 1" = 30' sheet 4
Civil Engineering
g g
P:336.723.1067
Stimmel Associates, PA Land Planning
F: 336.723.1069
description: STREAM IMPACT #S1
EXHIBIT
I ,
LL
u_
20' SANITARY SEWER EASEMENT I
TEMPORARY IMPACT #S1
6" FORCEMAIN STREAM IMPACTS:
410 SF (.009 AC) IMPACT WITHIN IMTERMITTENT/
TRIBUTARY T1 (MCDOWELL CREEK) (PER
E
WETLAND AND WOTUS DELINEATIONREPORT)
TEMPORARY IMPACT�THIN IMPACT \
FOOTPRINT:
CLEARING VEGETATION
,,F6R CONSTRUCTION,
TEMPORARY CULVE5T WILL BE INSTALLED IN
THE STREAM FOR ACCESS ACROSS. SEE
/ DETAIL ON SHEET 6.
LINE WILL BE INSTALLED WITH AN OPEN CUT
/AND THEN BACKFILLED TO
PRE -CONSTRUCTION GRADE.
/ MCDOWELL
/ TEMP. IMPACT #S1
SCAL
660
650
640
630
4-
Of 6
/
o' oDoDoDoDoD oD oD oD oD oD oD oD oO o. C
o0000000000000
o000000000000�
000000000000
o0000000000'
� w�00000000000000
D D D D D D D D D D D D D D D D O C
\� I o0000000000000000
o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 w o00000000000
0 0 0 0 0 70 0 0 0
o0000 0 00
\ \ o 00 00
CA
SEAL f' _
\ \ - 027912
12-6-2023
\ \ \ \ �7+rr�rry►'�
CREEK \ \ \ \ \ \
FM PLAN AND PROFILE \ \
E: 1" = 100' \
660 \ \
S50 \ \ \ \
S40 p
i30 \
-00 5+00 6+00

601 N. Trade S eet
Stimmel
20
Winston SalemtrNC
Landscape Architecture
27101-2916
Civil Engineering
StimmeI Associates, PA Land Planning
P:336.723.1067
F: 336.723.1069
EXHIBIT
date: 12/04/2023 job #: 22-001
project: Cone Health MedCenter Asheboro
scale: 1" = 30' sheet 5
Of 6
description: WETLAND AND STREAM IMPACTS #S2 & #4
n
+1 N
6" FORCEMAIN I I
�I
I II II L
I
TEMPORARY IMPACT #S2
6" FORCEMAIN STREAM IMPACTS: I I
400 SF (.009 AC) IMPACT WITHIN IMTERMITTENT TRIBUTARY T3 I
(PER THE WETLAND AND WOTUS DELINEATION REPORT)
I III
TEMPORARY IMPACTS WITHIN IMPACT FOOTPRINT: I I
CLEARING VEGETATION FOR CONSTRUCTION,
TEMPORARY CULVERT WILL BE INSTALLED IN THE STREAM
FOR ACCESS ACROSS. SEE DETAIL ON SHEET 6
LINE WILL BE INSTALLED WITH AN OPEN CUT AND THEN -n I I I
BACKFILLED TO PRE -CONSTRUCTION GRADE. I I I
TRIBUTARY T3 '
TEMPORARY IMPACT#
6" FORCEMAIN WETLAND IMPACTS:
247 SF (.006 AC) IMPACT WITHIN WETLAND W5 (PER THE WETLAND
AND WOTUS DELINEATION REPORT)
TEMPORARY IMPACTS WITHIN IMPACT FOOTPRINT:
CLEARING VEGETATION FOR CONSTRUCTION,
LINE WILL BE INSTALLED WITH AN OPEN CUT AND THEN BACKFILLED I
TO PRE -CONSTRUCTION GRADE.
TEMP. IMPACTS #S2 AND #4: FM PLAN AND PROFILE
660 SCALE: 1" = 100' 660
650
640
630
12+00
13+00
14+00
0
0
I
CA
SEAL _ I
027912 -
�•• 12-6-2023
•:;��ti�IHO NE�-�- I
" I
I
I
I
I I
I I
II
II
�
I I
I I
II I
I I
II I
I I
II
�
I
0I �I
-I-
�-I I I
� I
I I I
I I I
�
I I
I I I
III
II I
b
EX. DIRT PATH

601 N. Trade S eet
Stimmel
20
Winston SalemtTNC
Landscape Architecture
27101-2916
Civil Engineering
StimmeI Associates, PA Land Planning
P:336.723.1067
F: 336.723.1069
EXHIBIT
date: 12/04/2023 job #: 22-001
project: Cone Health MedCenter Asheboro
scale: NTS sheet 6
Of 6
description: TEMPORARY STREAM CROSSING DETAIL
`111111111't,
CA
-y
_ SEAL
1/2 DIAMETER OF PIPE 6" SURGE STONE (MIN.) CLASS B RIPRAP INFILL 027912
OR 24" WHICHEVER IS d50= 9"
GREATER U /-'. 12-6-2023
I NOTE: CONTRACTOR SHALL
FILTER FABRIC NSULT NTH PUMP PROVIDER
To
ACIETERRM MPUMP BEAND i��/ •`/�/^I�r���/ZO,�
NCDOT TYPE 2 _ SUFFICIENT TO CARRY BASE FLOW
III III—III—O III —III OF STREAM. �,'' r �....•.'O. n1,`,�
—I � I I- I�11111111111�+
_ SAND BAG UPSTREAM OF CULVERT AND PUMP
HDPE CULVERT (S)-1T1—III— BASE FLOW AROUND WORK AREA TO ALLOW
SEE PLAN VIEW FOR SIZE AND ROW INSTALLATION OF CULVERTS.
NUMBER OF CULVERTS ELEVATION
1 I+ +I HOPE CULVERT (5)
WASHED #57 STONE PIPE ;:.•.1..•.1. 1; .,.�.;. SEE THIS DETAIL FOR NUMBER
BEDDING AS REQUIRED AND DIAMETER OF CULVERTS
CLASS B RIPRAP INFILL
SURGE STONE
STREAM CROSSING SEQUENCE
1. SANDBAG UPSTREAM AND DOWNSTREAM OF
TEMPORARY CULVERTS.
2. PUMP STREAM BASE FLOW AROUND THE
CONSTRUCTION WITHIN THE STREAM.
3. INSTALL THE CULVERT(S) AND BACKFILL WITH STONE
AS SHOWN IN THE DETAIL.
4. REMOVE UPSTREAM SANDBAGS TO ALLOW FLOW
THROUGH THE TEMPORARY CULVERTS.
5. RE -INSTALL THE SANDBAGS PRIOR TO THE
FORCEMAIN INSTALLATION AND PUMP STREAM BASE
FLOW AROUND THE STREAM CROSSING.
6. TRENCH UNDER THE TEMPORARY CULVERTS TO
INSTALL THE FORCEMAIN.
7. RESTORE DISTURBED STREAM BANK TO THE
ORIGINAL CONDITION.
8. REMOVE SANDBAGS TO ALLOW STREAM TO FLOW
THROUGH CULVERTS.
O O DoO
o00epo
0°
v0�0ou
o opp
o
0 00°Oo.. °Op
O.
oe0
9C.
•b
°O
0 °�
oop.o0
O
00 0 00 a
.0°O. .o
0
°o0�00e
0 .0 OO
0 0 00
Oo0.0:0 G
00'O
ObOp °
.01 O op °o
0
°o'o
°
p
O000
O DO
°o.o G
oz
b'o ° °O
o 00o.
p .o
°O0°� o�
O-Oo.
o oQ_ O000p
O O
OGt�jO O
00 O0 00
OH. .p O
):O. pO 0 00 0 O O 0 p +
0 0.0 O60o
%
v_
0 0° Op, 0
po.b o''o. .. o N
O O o °O Oo o
O o o a O.0.0000.
°o
o O00 00.00
TOP OF BANK PL N TOP OF BANK
PROPOSED
FORCE MAIN
10'x10' DEWATERING/SEDIMENTATION
BASIN TH 2:1 SIDE SLOPES
SAND BAG DWIOWNSTREAM OF CULVERT DURING CULVERT INSTALLATION
AND FORCE MAIN INSTALLATION.
SAND BAG CAN BE REMOVED TO PASS STREAM BASE FLOW WHEN NO
CONSTRUCTION WIHHIN STREAM BANK.
STREAM CROSSING
PIPE DIAMETER
# OF PIPES
S 1
48"
2
S2
24"
2
TEMPORARY STREAM CROSSING