20191283 Ver 1_Birch Creek Impact Tables 191113_20191114

Strickland, Bev
From: Weikmann, Amanda <[e-mail]>
Sent: Thursday, November 14, 2019 5:01 PM
To: [e-mail]; Hamilton, David; McCall, Jeremy
Cc: Homewood, Sue
Subject: [External] RE: Request for Additional Information: Birch Creek Sewer Improvements
(Phases I and II), Guilford County; SAW-2019-00806
Attachments: Birch Creek Impact Tables 191113.pdf
External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to
[e-mail]
Hi David,
Please find our responses below in blue italics, next to the corresponding comment. The updated wetland and
waterbody impact tables are attached. We are finalizing the plans and will send those to you, and Sue, for your review as
soon as they are finished.
Let me know if you need any other information.
Thanks,
Amanda Weikmann, El
Arcadls I Arcadis G&M of North Carolina, Inc.
Direct [phone]
From: Bailey, David E CIV USARMY CESAW (USA) <[e-mail]>
Sent: Friday, October 18, 2019 5:16 PM
To: Weikmann, Amanda <[e-mail]>; Hamilton, David <David.Ham [e-mail]>
Cc: Homewood, Sue <[e-mail]>
Subject: Request for Additional Information: Birch Creek Sewer Improvements (Phases I and II), Guilford County; SAW-
2019-00806
WH
Thank you for your PCN and attached information, dated and received 9/24/2019, for the above referenced project. I
have reviewed the information and need clarification before proceeding with verifying the use of Nationwide Permit 12
(http://saw-reg.usace.army.mil/NWP2017/2017NWP12.pdf) and 18 ((http://saw-
reg.usace.army.mil/NWP2017/2017NWP18.pdf) . Please submit the requested information below (via e-mail is fine)
within 30 days of receipt of this Notification, otherwise we may deny verification of the use of the Nationwide Permit or
consider your application withdrawn and close the file:
1) Per NWP 12 General Conditions 23 (a) and (b) as well as 4.1.1, directional drilling/boring methods should be
used to the maximum extent practicable. If these methods are not practicable, clearly explain why;
The stream crossings will be used as permanent maintenance crossings to maintain the sewer lines. The
installation of the permanent crossings will impact the streams even if directional drilling/boring methods are
used.

2) Per the email from NCDWR on 10/2/2019, if any crossings are proposed to be re -aligned to comply with state
rules, please notify the Corps immediately along with a timeframe for re -submitting the information for our
review;
The type of stream/wetland impacts have not changed, however, the sewer has been re -aligned to comply with
Zone 1 buffer rules. We are still working on updating the plans with these changes, as well as wetland comments
mentioned below, and we will send those as soon as they are finished.
3) The following items pertain to the plan sheets C1-19 (Phase 1) and C1-5 (Phase 11):
a. Various wetland shapes are noticeably different on the survey than on the email -confirmed PJD you
submitted on 8/1/2019. Such wetlands include W-06, W22 (not shown on the plan sheets), S13 (not
shown on the plan sheets), W26, and W27. Please carefully review the plan sheets, ensure that the
wetland boundaries are shown accurately to what was verified by the Corps in the field, and explain any
discrepancies. Once all discrepancies have been accounted for, please update the PCN and other
relevant tables with proposed wetland impacts and compensatory mitigation;
Wetlands were reviewed and edits were made to correct wetlands that were missing survey flags. Any
other discrepancies are due to GPS error, the PJD was created using field GPS surveyed data and the
plans show field surveyed data. W022 and 5013, which were inadvertently missing from the first set of
plans, are now shown.
b. Please distinguish through shading or other means the permanently maintained corridor vs. the
construction corridor (i.e. temporary impacts only) within wetland areas;
An exhibit will be included with the plans that distinguishes between the permanently maintained
corridor vs. the construction corridor within the wetland areas.
c. "Stream Crossing 7" is a linear wetland rather than a stream. Please update the plans and PCN
accordingly;
Label on plans will be revised to show a Linear Wetland Crossing. This linear wetland crossing was not
included in any of the PCN stream impact tables, its impacts are totaled in the wetland table as TG-W24.
The profiles do not always show grades that indicate a stream channel (e. e.g. Stream Crossings 1, 3, and
8). Also, not all stream channel crossings show rip rap stabilization. Please ensure that all stream
crossings where rip rap is proposed are shown on the profile drawings;
Plans will show permanent crossings in profile view. Since the initial PCN submittal on September 24,
2019, updated survey files have been received and incorporated into the plans, all stream channels
should appear on the profile.
4) On the PCN and associated tables, please ensure that the permanent fill proposed for manholes in wetlands
extends the correct amount of decimal places to record the impact. Currently the impacts show "0.000."
The PCN impact table and ILF request have been updated to include the appropriate number of decimal places
for the permanent fill proposed for the two manholes in the wetlands.
5) The following items pertain to your compensatory mitigation proposal:
a. The Corps concurs that Wetland W19 is a PEM wetland and there would be no permanent conversion
impact to this resource as proposed. However, a portion of Wetland W03 is forested. Further, Wetland
W15 is a PSS wetland, and these wetland types are treated the same as forested by the Corps. As such,
please update the PCN and your compensatory mitigation proposal to account for permanent
conversion impacts to Wetlands W03 (a portion) and W15 (all);
The permanent conversion impact of the forested version of Wetland W03 was included in the original
ILF request. However, the form has been updated based on alignment changes per NC DWR comments
and to treat Wetland 15 (PSS) as a permanent conversion.

b. Will the wetland area proposed to be crossed via jack and bore still be cleared and permanently
maintained? If so, include this as a permanent maintenance impact in a forested wetland; compensatory
mitigation requirements apply;
The areas where we are using Bore & jack methods will not be cleared and maintained.
c. Note that the permanent fill impacts due to manholes (although small) would require compensatory
mitigation at 2:1 due to permanent loss;
Concur, the ILF form shows the fill impact for the two manholes and we understand that compensatory
mitigation will be at 2:1.
d. Note that all wetlands proposed for permanent conversion are considered Riparian, non-riverine
regarding wetland mitigation type. There are wetlands considered to be non -riparian by the Corps on
this project;
ILF request form has been updated per this comment.
e. Please update your NCDMS acceptance letter according to the above;
The ILF Request form revision will be sent to DMS and we will forward their response when it is received.
6) Given the potentially suitable habitat for small whorled pogonia and Schweinitz's sunflower within the project
area, please provide additional information to enable an effects determination for these species. Have surveys
been completed for either species? Unless a No Effect determination is warranted, consultation is required with
the USFWS pursuant to Section 7 of the Endangered Species Act. Please note that the Corps cannot verify the
use of a NWP until Section 7 consultation is complete;
An online project review request was submitted to US Fish and Wildlife Services on October 28, 2019 and they
have 30 days to respond. We will forward the response when it is received.
7) Please note that responses to the questions above may prompt additional information requests to allow full
evaluation of the proposed project.
Please let me know if you have any questions.
-Dave Bailey
David E. Bailey, PWS
Regulatory Project Manager
US Army Corps of Engineers
CE-SAW-RG-R
3331 Heritage Trade Drive, Suite 105
Wake Forest, North Carolina 27587
Phone: [phone], Ext. 30.
Fax: [phone]
Email: [e-mail]
We would appreciate your feedback on how we are performing our duties. Our automated Customer Service Survey is
located at: http://corpsmapu.usace.army.mil/cm apex/f?p=136:4:0
Thank you for taking the time to visit this site and complete the survey.
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GREENSBORO- BIRCH CREEK SEWER -PCN
11/13/19 Revision
Table C.2: Wetland Impacts
WETLAND IMPACTS
Sheet Location
2a
2b
2c
2d
2e
2f
Birch Creek sewer
Areas of Permanent
improvements (BC)
Type
Areas Impact
Areas of Forested Permanent
Birch Creek Lift Station
Wetland Letter Manhole in Wetland
Permanent* P or Temporary T
( ) p Y()
Type of Impact
Vp p
Cowardin Classification
Type of Wetland
Yp
Forested
ti
Jurisdiction
(acres)
c
Maintenance
Maintenance Impact (Acres)
Comments
Abandonment (BCLS)
Impact (Acres)
BC C-5
W002
T&P
Excavation
PFO
Headwater Forest
Yes
Corps
0.007
0.003
0.00
Impacts on PEM wetlands have no permanent
BC C-6
W003
T&P
Excavation
PEM
Non -Tidal Freshwater Marsh
No
Corps
0.090
0.046
_
conversion impact for mitigation purposes.
BC C-6
W003
T&P
Excavation
PFO
Headwater Forest
Yes
Corps
0.005
0.002
0.00
BC C-7
W005
T&P
Excavation
PFO
Headwater Forest
Yes
Corps
0.006
0.003
0.00
BC C-2
W007
T&P
Excavation
PFO
Headwater Forest
Yes
Corps
0.055
0.029
0.03
BC C-4
W011
T
Excavation
PFO
Headwater Forest
Yes
Corps
0.0001
-
-
BC C-4 & C-5
W012
T&P
Excavation
PFO
Headwater Forest
Yes
Corps
0.037
0.019
0.02
BC C-1
W014
T
Excavation
PFO
Headwater Forest
Yes
Corps
-
-
BC C-2, 12, 13, 14
W013
T&P
Excavation
PFO
Headwater Forest
Yes
Corps
1.052
0.369
0.37
Due to length of wetland and maximumim distance
BC C-14
W013 45,46
P
Disch. Of Fill/Loss of Waters
PFO
Headwater Forest
Yes
Corps
0.0006
0.0006
0.0006
between MHs, unable to avoid placing MHs in wetlands.
(25.1 SF)
PSS wetlands are treated as forested wetlands by
BCLS C-4
W015
T&P
Excavation
PSS
Non -Tidal Freshwater Marsh
No
Corps
0.044
0.022
0.022
the Corps, therefore a forested permanent
maintenance impact is included.
BCLS C-3
W016
T&P
Excavation
PFO
Headwater Forest
Yes
Corps
0.009
0.005
0.00
BCLS C-1
WO17
T&P
Excavation
PFO
Headwater Forest
Yes
Corps
0.021
0.009
0.01
Impacts on PEM wetlands have no permanent
BCLS C-1
W019
T&P
Excavation
PEM
Non -Tidal Freshwater Marsh
No
Corps
0.009
0.004
_
conversion impact for mitigation purposes.
BC C-11
W025
T&P
Excavation
PFO
Headwater Forest
Yes
Corps
0.006
0.004
0.00
BCLS C-3
W026
T&P
Excavation
PFO
Headwater Forest
Yes
Corps
0.008
0.004
0.00
BC C-10
TG - W24 (SAW 2018-00240)
T&P
Excavation
PFO
Headwater Forest
Yes
Corps
0.002
0.001
0.00
Linear wetland
BC C-10
TG - W25 (SAW 2018-00240)
T
Excavation
PFO
Headwater Forest
Yes
Corps
0.002
-
Linear wetland.
TOTAL DISTURBED AREA
1.35
0.52
0.47
*Permanent impacts are based on a 10' maintence corridor
Wetland and Stream Impacts 191113.xlsx-T&P Impacts Page 1 of 2

Sheet Location
3a
3b
3c
3d
3e
3f
3g
Birch Creek Sewer
Improvements IBC)
Perennial (PER) or Intermittent
Average Stream
Temporary Impact
Permanent Impact
Birch Creek Lift station
PCN Stream Number
1D Stream Number
Permanent* (P) or Temporary (T)
Type of Impact
Stream Name
(INT)
Type of Jurisdiction
Width (ft)
Length (LF)
Comments
Length (LF)
Abandonment (BCLS)
BCC-1
SO
5023
P
Excavation
Little Alamance Creek Trib S UNT
EPHM
Corps
16.0
20
10
BC C-2
S1
5005
T
Excavation
Little Alamance Creek Trib 6
PER
Corps
45.0
30
-
BCC-4
S2
5007
P
Excavation
Little Alamance Creek Trib S UNT
INT
Corps
13.0
20
10
BC C-5
S3
5003
P
Excavation
Little Alamance Creek Trib 5 UNT
PER
Corps
11.0
20
10
BCC-7
S4
5004
P
Excavation
Little Alamance Creek Trib S UNT
INT
Corps
10.0
20
10
BC C-8
S5
TG - Stream B (SAW 2018-00240)
P
Excavation
Little Alamance Creek Trib 5 UNT
PER
Corps
12.0
20
10
BCC-10
S6
5019
P
Excavation
Little Alamance Creek Trib S UNT
INT
Corps
8.0
25
10
BCC-14
S7
5008
P
Excavation
Little Alamance Creek Trib 6 UNT
INT
Corps
6.0
20
10
BC C-15
S8
TG - Stream C (SAW 2018-00240)
P
Excavation
Little Alamance Creek Trib 6 UNT
PER
Corps
15.0
20
10
BCLS C-1
S9
5016
T
Excavation
Little Alamance Creek Trib 6 UNT
PER
Corps
8.0
45
-
BCLS C-1
S10
S014a
T
Excavation
Little Alamance Creek Trib 6
PER
Corps
50.0
20
-
BCLS C-2
S11
5010
T
Excavation
Little Alamance Creek Trib 6
PER
Corps
15.0
30
-
BCLS C-3
S12
5012
P
Excavation
Little Alamance Creek Trib 6 UNT
INT
Corps
16.0
45
10
Total Temporary Disturbed Length (LF)
335
Total Permanent Disturbed Length (LF)
90
*Permanent impacts are based on a 10' maintence corridor
Table C.6 Buffer Impacts
BUFFER IMPACTS
Sheet Location
6b
6c
6d
6e
6f
6g
Birch Creek sewer
Zone l Impact (sf)
Zone 2 Impact (sf)
Improvements (BC)
PCN Stream Number
1D Stream Number
Permanent (P)* or Temporary (T)
Reason for Impact
Stream Name
Buffer Mitigation Required?
Zone 1 Impact (sf)
after subtracting
Zone 2Impact (sf)
after subtracting
Comments
Birch Creek Lift station
Abandonment (BCLS)
Wetlands
Wetlands
T
1,691
1,691
1,854
1,854
Perpendicular Crossing exempt from mitigation. Avg stream width 16' with 10' wide permanent
BC C-1
SO
5023
Utility Easement
Little Alamance Creek Trib 5 UNT
N
maintenance corridor
P
624
624
-
-
T
1,238
1,435
1,224
599
Perpendicular Crossing allowable, no other practical alternative. Avg stream width 45' with 10' wide
BC C-2
Sl
5005
Utility Easement
Little Alamance Creek Trib 6
N
permanent maintenance corridor
P
608
307
-
BC C-4
S2
SOOT
T
Utility Easement
Little Alamance Creek Trib 5 UNT
N
1,868
1,868
2,026
2,026
Perpendicular Crossing exempt from mitigation. Avg stream width 13' with 10' wide permanent
P
646
646
-
-
maintenance corridor
BC C-5
S3
5003
T
Utility Easement
Little Alamance Creek Trib 5 UNT
N
1,280
1,174
1,548
1,466
Perpendicular Crossing exempt from mitigation. Avg stream width 11'with 10' wide permanent
P
612
506
-
-
maintenance corridor
BC C-7
54
5004
T
Utility Easement
Little Alamance Creek Trib 5 UNT
N
1,885
1,828
1,873
1,873
Perpendicular Crossing exempt from mitigation. Avg stream width 10' with 10' wide permanent
P
610
570
-
-
maintenance corridor
BC C-8
SS
TG - Stream B (SAW 2018-00240)
T
Utility Easement
Little Alamance Creek Trib 5 UNT
N
1,800
1,800
2,070
2,070
Perpendicular Crossing exempt from mitigation. Avg stream width 12' with 10' wide permanent
P
624
624
-
maintenance corridor
BC C-10
56
5019
T
Utility Easement
Little Alamance Creek Trib 5 UNT
N
2,023
2,023
1,874
1,874
Perpendicular Crossing exempt from mitigation. Avg stream width 8' with 10' wide permanent
P
615
615
-
-
maintenance corridor
BC C-14
57
5008
T
Utility Easement
Little Alamance Creek Trib 6 UNT
N
1,671
1,671
1,841
1,841
Perpendicular Crossing exempt from mitigation. Avg stream width 6' with 10' wide permanent
P
613
613
-
-
maintenance corridor
T
N
2,198
2,198
2,454
2,454
Perpendicular crossing exempt from mitigation; avg stream width 15' with 10' wide permanent
BC C-15, 19
S8
TG - Stream C (SAW 2018-00240)
P
Utility Easement
Little Alamance Creek Trib 6 UNT
N
695
695
-
-
maintenance corridor.
T
N
-
8,951
8,951
Parallel Zone 2 impacts exempt
T
1,941
1,941
1,267
1,267
Perpendicular Crossing exempt from, mitigation. Avgstream width 8'with 10'wide permanent
m
BCLS C-1
S9
5016
Utility Easement
Little Alamance Creek Trib 6 UNT
N
maintenance corridor
a
P
1,226
1,226
-
_
T
N
2,038
2,038
2,059
2,048
Perpendicular Crossing allowable, no other practical alternative. Avg stream width 50' with 10' wide
BCLS C-1
510
S014a
P
Utility Easement
Little Alamance Creek Trib 6
N
676
676
-
-
permanent maintenance corridor.
T
N
-
-
3,650
3,131
Parallel Zone 2 impacts exempt
T
N
2,510
2,510
1,077
1,077
Perpendicular crossing exempt from mitigation. Avg stream width 15' with 10' wide permanent
BCLS C-2, 3, 4
S11
Solo
P
Utility Easement
Little Alamance Creek Trib 6
N
735
735
-
-
maintenance corridor.
T
N
-
-
6,435
6,435
Parallel Zone 2 impacts exempt
T
1,709
1,667
1,844
1,565
Perpendicular Crossing exempt from mitigation. Avg stream width 16' with 10' wide permanent
BCLS C-3
512
5012
Utility Easement
Little Alamance Creek Trib 6 UNT
N
maintenance corridor
P
653
632
-
-
BCC-11
S13
5018
T
Utility Easement
Little Alamance Creek Trib S
N
-
-
5,780
5,591
Parallel Zone 2 impacts exempt
BCC-13
S14
5009
T
Utility Easement
Little Alamance Creek Trib 6 UNT
N
-
-
3,061
2,511
Parallel Zone 2 impacts exempt
BCC-1 to 10
515
5001
T
Utility Easement
Little Alamance Creek Trib S
N
54,986
53,750
Parallel Zone 2 impacts exempt
TOTAL BUFFER IMPACTS (SF)
32,789
32,313
105,874
102,383
TOTAL PERMANENT BUFFER IMPACTS (SF)
8,469
BUFFER IMPACTS REQUIRING MITIGATION (SF)
0
*Permanent impacts are based on a
10' maintence corridor
Wetland and Stream Impacts 191113.xlsx-T&P Impacts Page 2 of 2