20200140 Ver 2_SAW-2017-01248 - Response to Comments_20210209

Wildcat Branch Subdivision PCN Response Page 1 of 2

February 9, 2021

US Army Corps of Engineers NC Division of Water Resources
Raleigh Regulatory Office 401 & Buffer Permitting Unit
Attn: Mr. Lyle Phillips Attn: Ms. Stephanie Goss
3331 Heritage Trade Drive 512 N. Salisbury Street
Suite 105 Raleigh, NC 27604
Wake Forest, NC 27587

Re: Liberty Stations (Formerly Wildcat Branch Subdivision)
Response to Comments
SAW-2017-01248 / NCDWR #20-0140
Sage Project #2017.34

Please find attached response to USACE comments submitted via email on September 22, 2020, and
December 21, 2020. Both sets of comments have been combined under the respective Site Impact Areas.

1. The PCN states that the permanent stream loss from the installation of the culvert will result in 129
linear feet of loss; however, the impact map for impact area 1 states that the culvert installation will
result in 149 linear feet of loss (see attached Impact Area 1). Please update the PCN or the impact
exhibit with the correct linear footage.
a. The total permanent stream loss from installation of the culvert is 129 LF. The total
permanent no loss stream impact from a rip rap dissipater pad is 70 LF. These impacts
were added incorrectly on the impact maps on the previous submittal. The updated impact
maps have been revised to reflect the correct impact totals. The revised PCN tables are
included. Please note that the riprap below the culvert outlet will be keyed into the existing
soil surface so that the elevation of the riprap post construction is that of the current
elevation.
2. Does the proposed project impact stream SD (see attached Impact Area 3)? Please depict all
jurisdictional features on the impact exhibits (SA, SB, SC, SD). Please update the PCN and impact
exhibits if impacts occur.
a. No impacts to Stream SD are proposed. The impact maps have been updated to reflect all
jurisdictional features on the Site.
3. In order to verify compliance with Regional Condition 3.6.1 please provide a profile view of the road
crossing/culvert installation/riprap dissipator.
a. A profile view has been included in the updated impact map set.

Wildcat Branch Subdivision PCN Response Page 2 of 2

4. Please describe the installation methods of the sewer crossing including and dewatering activities.
a. The proposed sewerline installation will be constructed using open cut and will utilize coffer
dams and a pump around so work will be performed in the dry.

5. Can you provide a quick description of the habitat for USFWS within the project area (at the two
crossings), so that we can determine the potential for suitable habitat for Michaux’s sumac? Sumac
survives best in areas where some form of disturbance has provided an open area. For example,
is the canopy dense; not allowing for sufficient sunlight for sumac growth? Do you recall surveying
for sumac species during the delineation?
a. An approximately 80-foot section where the sewer crossing is located provides marginal
sunlight but lacks soils with suitable pH for Michaux’s sumac. The soils in the field matched
the mapped soils for the area (Cecil series). The crossing area also exhibited dense
herbaceous cover and very few shrubs. The NCNHP database report does not list any
known occurrences of Michaux’s sumac within 1.0 mile of the Site.
Additionally, please note that Initially the BMP outfall impact at Site 4 was thought to be discharging to an existing
conveyance; however, it was found that this was not the case. Therefore, the outfall was extended to discharge
into Zone 1. This results in 670 sf of impact. This revision is reflected on the attached Impact Map and the
attached PCN Impact Table. Please replace the previously requested impacts with those identified within the
attached tables.
If you have any questions, please call me at [phone].
Sincerely,

Kim Hamlin
Sage Ecological Services, Inc.

Attachments:
Pre-construction Notification (PCN) Revised Impact Tables
Impact Maps (6 sheets)

Page 4 of 10
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.
Wetland impact
number
Permanent (P) or
Temporary (T)
2b.

Type of impact
2c.

Type of wetland
(if known)
2d.

Forested

2e.
Type of jurisdiction
Corps (404, 10) or
DWQ (401, other)
2f.

Area of
impact
(acres)
-
2g. Total wetland impacts 0
2h. Comments: This project does not propose wetland impacts.
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)
Site 1 (P) Culvert SB Intermittent Corps 5 129
Site 1 (P) Riprap SB Intermittent Corps 15 70
Site 3 (T) Dewatering SB Intermittent Corps 5 40
3h. Total stream and tributary impacts 219
3i. Comments: All impacts are the same as previously approved except for the riprap dissipater which has increased in length
from 20 feet to 70 feet.
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 individually 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)
O1 Choose one Choose One Choose
4f. Total open water impacts 0
4g. Comments: This project does not propose open water impacts.

5. Pond or Lake Construction
If pond or lake construction proposed, then complete the chart below.

Page 5 of 10
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 Flooded
P1 Choose One
P2 Choose One
5f. Total 0 0 0 0 0 0 0
5g. Comments: This project does not propose Pond or Lake construction
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? 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)
Site 1 (P) –
Allowable w/
Authorization
Road
Crossing SB No 7,860 4,447
Site 2 (T) –
Allowable w/
Authorization
Road
Grading SB No 58 3,044
Site 2 (P) –
Allowable w/
Authorization
Sidewalk SB No 432 0
Site 3 (P) –
Deemed
Allowable
Sewerline
Installation SB No 1,504 603
Site 4 (P) –
Deemed
Allowable
BMP
outfall SA No 670 403
6h. Total buffer impacts 10,524 8,497
6i. Comments: Total riparian buffer impacts in Zone 1 = 10,524 sf, and Zone 2 = 8,497 sf

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(MATERIAL UNKNOWN)PHASE 2PHASE 1PHASE 2
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M.H. No. 6 - 6'LT
STA: 18+15.97M.H. No. 7 - 6'LT
STA: 19+17.11
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STA: 20+56.40
M.H. EX. 1 - 33'LT
STA: 11+10.09
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STA: 15+03.41
4' EXT. BASE
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M.H. No. 17 - 6'LT
STA: 27+51.64
M.H. No. 18
STA: 10+86.19
EXIST. M.H
STA: 10+00.00C9
SC DIEHL & PHILLIPS, P.A.CONSULTING ENGINEERS - LIC. NO. C-04651500 Piney Plains Rd., Suite 200CARY, N.C. 27518 = [phone]RALEIGH, NORTH CAROLINAWILDCAT BRANCH SUBDIVISION0
GRAPHIC SCALE
40 20 40 80
IMPACT AREA - 4
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IMPACT MAP - AREA LOCATIONS
WILDCAT BRANCH IMPACTMAP - AREA LOCATIONS
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M.H. No. 3 - 6'LT
STA: 14+96.46
M.H. No. 5 - 8'RT
STA: 10+72.61
M.H. No. 4 - 6'RT
STA: 11+71.87
M.H. No. 6 - 6'LT
STA: 18+15.97M.H. No. 7 - 6'LT
STA: 19+17.11
M.H. No. 8 - 6'LT
STA: 20+56.40
M.H. EX. 1 - 33'LT
STA: 11+10.09
M.H. No. 9 - 6'LT
STA: 11+85.48
M.H. No. 10 - 6'LT
STA: 15+03.41
4' EXT. BASE
M.H. No. 18
STA: 10+86.19
EXIST. M.H
STA: 10+00.00C9
SC DIEHL & PHILLIPS, P.A.CONSULTING ENGINEERS - LIC. NO. C-04651500 Piney Plains Rd., Suite 200CARY, N.C. 27518 = [phone]RALEIGH, NORTH CAROLINAWILDCAT BRANCH SUBDIVISIONROAD CROSSING
IMPACT MAP - AREA 1
WILDCAT BRANCH IMPACTMAP - AREA 10
GRAPHIC SCALE
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EXISTING CITY OF
RALEIGH SAN. SEWER
EASEMENT
HACKSAW TRAIL RALEIGH PINES DR.HACKSAW
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IMPACT AREA - 1
HACKSAW TRAIL
REQUIRED CITY RIGHT OF WAY DEDICATION
NO CONSTRUCTION
PROPOSED WITHIN
BUFFERS
1
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1
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BASIN No. 2
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M.H. No. 3 - 6'LT
STA: 14+96.46
M.H. No. 5 - 8'RT
STA: 10+72.61
M.H. No. 4 - 6'RT
STA: 11+71.87
M.H. No. 6 - 6'LT
STA: 18+15.97M.H. No. 7 - 6'LT
STA: 19+17.11
M.H. No. 8 - 6'LT
STA: 20+56.40
M.H. EX. 1 - 33'LT
STA: 11+10.09
M.H. No. 9 - 6'LT
STA: 11+85.48
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STA: 15+03.41
4' EXT. BASE
M.H. No. 18
STA: 10+86.19
EXIST. M.H
STA: 10+00.00C9
SC DIEHL & PHILLIPS, P.A.CONSULTING ENGINEERS - LIC. NO. C-04651500 Piney Plains Rd., Suite 200CARY, N.C. 27518 = [phone]RALEIGH, NORTH CAROLINAWILDCAT BRANCH SUBDIVISIONWILDCAT BRANCH IMPACTMAP - AREA 2PARALLEL ROAD GRADING
(ROAD IS OUTSIDE BUFFERS)
IMPACT MAP - AREA 2
EXISTING CITY OF
RALEIGH SAN. SEWER
EASEMENT
0
GRAPHIC SCALE
40 20 40 80
HACKSAW TRAIL RALEIGH PINES DR.HACKSAW
T
R
A
I
L
IMPACT AREA - 2
EXISTING CULVERT
REQUIRED CITY RIGHT OF WAY DEDICATION
NO CONSTRUCTION
PROPOSED WITHIN
BUFFERS
SSSSSSSSSSSSSSEXISTING 8" SAN. SEWER
(MATERIAL UNKNOWN)PHASE 2PHASE 1PHASE 2
PHASE 1
C C C C C C CCC
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OFFSITE
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BASIN No. 2
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NORTH CAROLINA STATE OF
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151
152
153
154
155 156 157 158
168 169
170 171
173 174 175
133
159
160
161 162 163
164
165 166
167
172
182
184
82
83
84
SS
S
S
S
S
S
S
S
S
S
SSS
Q
R
U
V
S
W P-18 P-19 P-17 P-20
P-16
P-22
P-23 P-24
Z
P-29
AA
P-28
BB
P-30DD
HH
II
JJ
KK P-36 P-37
P-38 P-35
GG
P-39 P-40
LL
P-44QQ
P-46
RR
FF P-31 P-3
3
EE
P-32 P-54 P-50 P-49
UU
ZZ
TT
XX
WW
VV
P-51 P-56
CCC
P-57
DDD
AAA
P-55BBB
P
-
6
1
HHH
P-62 P-6
3
III
P-56
P-57
P-21SS
S
T
X
Y P-25 P-26SS P-47CC
P-65
OO
P-43
P-42
MM
NN
PP
P-45EEE
FFF
P
-59
P
-58 P-60 P-53 P-48
GGG
B-2P1179
C3
C5
C4
C6
C10 P-34YY
P-64M.H. No. 7 - 6'LT
STA: 19+17.11
M.H. No. 8 - 6'LT
STA: 20+56.40
M.H. EX. 1 - 33'LT
STA: 11+10.09
M.H. No. 9 - 6'LT
STA: 11+85.48
M.H. No. 10 - 6'LT
STA: 15+03.41
4' EXT. BASE
M.H. No. 11 - 6'LT
STA: 16+65.60
M.H. No. 13 - 6'LT
STA: 19+28.42
M.H. No. 21 - 13'RT
STA: 19+81.41
M.H. No. 22 - 17'RT
STA: 20+17.32
M.H. No. 23 - 6'RT
STA: 20+63.16
M.H. No. 24 - 13'RT
STA: 23+41.01
M.H. No. 20 - 10'RT
STA: 25+95.28
M.H. No. 16 - 4'LT
STA: 26+60.26
M.H. No. 17 - 6'LT
STA: 27+51.64
M.H. No. 19
STA: 12+49.67
M.H. No. 18
STA: 10+86.19
EXIST. M.H
STA: 10+00.00 P-34C7
C8 C9 P-52
SD DIEHL & PHILLIPS, P.A.CONSULTING ENGINEERS - LIC. NO. C-04651500 Piney Plains Rd., Suite 200CARY, N.C. 27518 = [phone]RALEIGH, NORTH CAROLINAWILDCAT BRANCH SUBDIVISIONWILDCAT BRANCH IMPACTMAP - AREA 3PERPENDICULAR SEWER CROSSING
IMPACT MAP - AREA 3
0
GRAPHIC SCALE
40 20 40 80
EXISTING CITY OF
RALEIGH SAN. SEWER
EASEMENT
IMPACT AREA - 3
EXISTING CULVERT
SSSSSSSSSSSSSSEXISTING 8" SAN. SEWER
(MATERIAL UNKNOWN)PHASE 2PHASE 1PHASE 2
PHASE 1
CCCCC C C C C C C C C CCCC C C C C C
C
C
C
C
C
C
C C
C
C
CCC
C
C
C
C
C
C C C C C C C C
CCCCCCCCC
C
C
C
C
C
C
C
C
C
C
C
C
DRY
DETENTION
BASIN No. 2
PHASE LINENORTH CAROLINA STATE OF
SS
SS
SS
SS
SS
SS
SS SSSSSSSSSSSSSSSSSSSSSSSSSSSSSS
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS SSSSSSSSDRY
DETENTION
BASIN
No. 1SSSSSSSS SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
TREE
CONSERVATION
AREA
TREE
CONSERVATION
AREA
TREE
CONSERVATION
AREA 31
0
3
0
0300290
280
280290
300
31
0 32030031031
0
300C C
CC
C CCC
C
CC
CC
CC
C
300290
280
310
3203103003003
0
0
10
11
1213
14
151617
18
1920212223
24
2526
27
28
2930
3233
3435
38 39 40
41
42 43
44
45 46
47 48 49 50
51
62
63
64
6566
67
68
31
180
181
176
37
36
61
177
69
70
71
72
73
747576
7778
7980
132
134
135
136
137
138
139
140
141
171
173 174 175
133
172
SSSS
S
S
S
S
S
SSE
F
G
H
I
L
K
N
O
Q
R
U
V
S
W
P
-6 P-7 P-8
P
-
9 P-5 P-10 P-10 P-10 P-11
P-12 P-18 P-19 P-17 P-20
P-16 P-14 P-22
P-23 P-24
Z
P-29
AA
P-28
BB
P-30DD
P-44QQ
P-46
RR
FF P-31 P-3
3
EE
P-32 P-8
P
-
9
P-10 P-10 P-10 P-12 P-21JS
S
P
P-15
T
X
Y P-25 P-26SS P-47CC
P-65
OO
P-43
P-42
NN
PP
P-45 P-48 B-2P1179
178
C2C3
C5
C4
C10
P-41 P-41
M.H. No. 3 - 6'LT
STA: 14+96.46
M.H. No. 5 - 8'RT
STA: 10+72.61
M.H. No. 4 - 6'RT
STA: 11+71.87
M.H. No. 6 - 6'LT
STA: 18+15.97M.H. No. 7 - 6'LT
STA: 19+17.11
M.H. No. 8 - 6'LT
STA: 20+56.40
M.H. EX. 1 - 33'LT
STA: 11+10.09
M.H. No. 9 - 6'LT
STA: 11+85.48
M.H. No. 10 - 6'LT
STA: 15+03.41
4' EXT. BASE
C/L INTERSECTION
C/L INTERSECTION
C/L INTERSECTION
C/L INTERSECTION
M.H. No. 17 - 6'LT
STA: 27+51.64
M.H. No. 18
STA: 10+86.19
EXIST. M.H
STA: 10+00.00C9
SC DIEHL & PHILLIPS, P.A.CONSULTING ENGINEERS - LIC. NO. C-04651500 Piney Plains Rd., Suite 200CARY, N.C. 27518 = [phone]RALEIGH, NORTH CAROLINAWILDCAT BRANCH SUBDIVISION0
GRAPHIC SCALE
40 20 40 80
IMPACT AREA - 4
PERPENDICULAR STORMWATER
DISCHARGE INTO EXISTING SWALE
IMPACT MAP - AREA 4
WILDCAT BRANCH IMPACTMAP - AREA 4
STREET
STA. 10+97.68' P-24 CROSSING =
STA. 11+25.36' HACKSAW WEST
280
290
300
310
270
280
290
300
310
9+00 10+00 11+00 12+00 13+00 120 LF 72" RCP
P-24DIEHL & PHILLIPS, P.A.CONSULTING ENGINEERS - LIC. NO. C-04651500 Piney Plains Rd., Suite 200CARY, N.C. 27518 = [phone]RALEIGH, NORTH CAROLINAWILDCAT BRANCH SUBDIVISIONPLAN AND PROFILE - STORMDRAINAGE CULVERT P-24PROFILE - STORM DRAINAGE
CULVERT P-24