20180957 Ver 2_01_DTGW_Modification_CoverLetter_20211217

Kimley>»Horn
December 17, 2021
Mr. James Lastinger
U.S. Army Corps of Engineers
Raleigh Regulatory Field Office
3331 Heritage Trade Drive, Suite 105
Wake Forest, NC 27587
Ms. Sue Homewood
NC Division of Water Resources
450 West Hanes Mill Road
Winston-Salem, NC 27105
RE: Greensboro Downtown Greenway Phase 4 and College Branch Stream Enhancement
NCDWR #20180957; SAW-2017-01430
Section 4041401 and Buffer Authorization Modification Request
Greensboro, Guilford County, North Carolina
Dear Mr. Lastinger and Ms. Homewood,
On behalf of our client, the City of Greensboro, Kimley-Horn is requesting a modification to the previously
approved Section 404 Nationwide Permit (SAW-2017-01430), Section 401 Water Quality Certification, and
Jordan Lake Watershed Riparian Buffer Authorization (NCDWR #20180957) for the above referenced
project in Guilford County. The project was originally permitted in July 2018 under a NWP 3, NWP 14, and
NWP 27 and corresponding WQC 4132, 4134, and 4135. An approved 404 permit was issued by Mr. David
Bailey of the USACE on August 6, 2018. An approved 401 permit was issued by Ms. Sue Homewood of
NCDWR on August 27, 2018.
This modification request proposes to implement additional natural stream design features along
approximately 2,000 feet of College Branch. The design changes include additional stream structures for
grade control and profile variability, and realignment of College Branch to reduce erosion. This modification
request also proposes the realignment of existing sanitary sewer lines along the greenway and stream
restoration which will include two stream crossings and multiple existing sewer tie-ins. Proposed sanitary
sewer easement is anticipated for this project and has been shown on the project plan sheets. Changse to
the proposed stream restoration and the additional of the utility line re -alignment has resulted in minor
modifications to the greenway alignment. Additionally, as design of the greenway and stream restoration
progressed, and as new survey information was made available, minor discrepancies between the
proposed limits of disturbance and property lines were identified and rectified.
As a result of the greenway alignment shift, additional stream design features, and addition of the sanitary
sewer realignment and easement, changes to the proposed impacts to UT to North Buffalo Creek (Stream
S2) will occur at stream impact Sites 2, 3, and 4, and changes to the proposed impacts to Zone 1 and Zone
2 of the protected buffer associated with stream S2 will occur at buffer impact Sites 1, 2, 3, 4, 5, 6, and 7.
Specific impact amounts at each impact site are denoted on the buffer and stream impact drawings with an
explanation of each site below. To match the previously approved Pre -Construction Notification, a table of
proposed new impacts and changes is below.

Kimley»>Horn
Page 2
C. Proposed Modification to Impacts
1. 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.
3h.
Stream impact
Type of impact
Stream name
Perennial
Type of
Average
Impact
Change
number -
(PER) or
jurisdiction
stream
length
from
Permanent (P) or
intermittent
(Corps - 404, 10
width
(linear
Permitted
Temporary (T)
(INT)?
DWQ — non-
(feet)
feet)
(linear feet)
404, other)
S2 ❑ P ® T
Erosion Control
UT to N.
Buffalo
® PER
® Corps
35
82
-10
Measures
❑ INT
® DWQ
S2 ® P ❑ T
Stream Restoration
UT to N.®PER
Buffalo reek
®Corps
35
2109
+455
with loss of water
El INT
® DWQ
S2 ® P ❑ T
Stream Restoration
UT to N.®PER
Buffalo
®Corps
35
1705
-431
without loss of water
El INT
® DWQ
UT to N.
❑ PER
® Corps
S4 ® P ❑ T
Pipe
Buffalo Creek
®INT
®DWQ
12
149
0
(S4)
Debris
UT to N.
❑PER
® Corps
S5 ® P ❑ T
Removal/Channel
Buffalo Creek
® INT
® DWQ
12
145
0
Repair
S5
3i. Total stream and tributary impacts
4190
+15
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.
❑ Neuse ❑ Tar -Pamlico
6a.
❑ Catawba ❑ Randleman
Project is in which protected basin?
® Other: Jordan Lake Watershed
6b.
6c.
6d.
6e.
6f.
6g.
6h.
6i.
Buffer
impact
Reason for
Buffer
Zone 1
Zone 1 Change
Zone 2
Zone 2
number—
impact
Stream name
mitigation
impact
from Permitted
impact
Change from
Permanent
required?
(square feet)
(square feet)
(square feet)
Permitted
(P) or
(square feet)
Temporary
T
B1❑ P ® T
Stream
S2:UT to N.
❑ Yes
51,361
+7,291
25,434
+10,597
Enhancement
Buffalo Creek
® No
B2® P ❑ T
Stream
S2:UT to N.
❑ Yes
22,506
+10,694
0
0
Enhancement
Buffalo Creek
® No
B3® P ❑ T
Greenway
S2:UT to N.
Buffalo Creek
❑ Yes
® No
72,467
+7
39,703
-263
B4® P ❑ T
Utility
Easement
S2:UT to N.
Buffalo Creek
® Yes
❑ No
4,155
+4,155
1,595
+1,595
6j. Total buffer impacts
150,489
+22,147
66,732
+11,929

K i m ey ',>> H o r n Page 3
Buffer Impact Changes
At Buffer Impact Site 1, an increase of 5,562 sq ft of permanent Zone 1 impacts and an increase of 159 sq
ft of permanent Zone 2 impacts will result from the greenway alignment shift and stream restoration design
changes. Temporary impacts at Buffer Impact Site 1 will decrease by 5,344 sq ft in Zone 1 and 8 sq ft in
Zone 2 as a result of the greenway alignment shift.
At Buffer Impact Site 2, a net increase of 1,534 sq ft of permanent Zone 1 impacts and a net decrease in
422 sq ft of permanent Zone 2 impacts will result from the greenway alignment shift and stream restoration
design. Temporary impacts will increase by 3,948 sq ft in Zone 1 and 540 sq ft in Zone 2 as a result of the
greenway alignment shift.
At Buffer Impact Site 3, an increase in 6,700 sq ft of permanent Zone 1 impacts and an increase of 577 sq
ft of permanent Zone 2 impacts will result from the greenway alignment shift, stream restoration and
additional sanitary sewer design. The realignment of the sanitary sewer and addition of new sewer
easement accounts for an additional 2,574 sq ft of permanent Zone 1 impacts at Buffer Impact Site 3.
Temporary impacts will increase by 9,956 sq ft in Zone 1 and 9,376 sq ft in Zone 2 as a result of the
greenway alignment shift and addition of sanitary sewer easements.
At Buffer Impact Site 4, a net increase of 1,069 sq ft of permanent Zone 1 impacts and a net increase of
1,016 sq ft of permanent Zone 2 impacts will result from the greenway alignment shift, stream restoration
and additional sanitary sewer design. The realignment of the sanitary sewer and addition of new sewer
easement accounts for an additional 1,401 sq ft of permanent Zone 1 impacts at Buffer Impact Site 4.
Temporary impacts will decrease by 755 sq ft in Zone 1 and increase by 278 sq ft in Zone 2 as a result of
the greenway alignment shift.
At Buffer Impact Site 5, a decrease of 8 sq ft of permanent Zone 1 impacts and an increase of 2 sq ft of
permanent Zone 2 impacts will result from the greenway alignment shift. Temporary impacts will decrease
by 324 sq ft in Zone 1 and increase by 435 sq ft in Zone 2 as a result of the greenway alignment shift.
At Buffer Impact Site 6, an increase of 1 sq ft of permanent Zone 1 impacts will result from the greenway
alignment shift and tweaks to the proposed limits of disturbance. Temporary impacts will decrease by 187
sq ft in Zone 1 and decrease by 9 sq ft in Zone 2 as a result of the greenway alignment shift and tweaks to
the proposed limits of disturbance.
At Buffer Impact Site 7, a decrease of 2 sq ft of permanent Zone 1 impacts and a decrease of 1 sq ft of
permanent Zone 2 impacts will result from the greenway alignment shift and tweaks to the proposed limits
of disturbance. Temporary impacts will decrease by 3 sq ft in Zone 1 and decrease by 14 sq ft in Zone 2 as
a result of the greenway alignment shift and tweaks to the proposed limits of disturbance.
Stream Impact Changes
At Stream Impact Site 2, permanent stream impacts a will increase by 7 LF as a result of changes to the
proposed structures within Stream S2.
At Stream Impact Site 3, permanent stream impacts will increase by 69 LF and permanent no -net loss
stream impacts will decrease by 67 LF as a result of adding additional structures in the stream.

Kimley ',>> Horn Page
At Stream Impact Site 4, permanent stream impacts will increase by 379 LF and permanent no -net loss
stream impacts will decrease by 364 LF as a result of the changes to the proposed structures within Stream
S2. Temporary stream impacts will decrease by 10 LF at Stream Impact Site 4.
Closure
To summarize, a net increase of 455 LF of permanent stream impacts, net decrease of 431 LF permeant
no -net loss stream impacts, and a net decrease of 10 LF of temporary stream impacts will result from the
proposed project changes. A net increase of 14,856 sq ft permanent impacts to Buffer Zone 1 and 1,331
sq ft permanent impacts to Buffer Zone 2, as well as a net increase of 7,291 sq ft of temporary impacts to
Buffer Zone 1 and a net increase of 10,598 sq ft of temporary impacts to Buffer Zone 2 will result from the
proposed project changes.
To offset the unavoidable permanent Buffer Zone 1 impacts resulting from the proposed parallel sanitary
sewer easement, compensatory mitigation has been reserved through Resource Environmental Solutions
(RES), LLC (Cloud & Banner Nutrient Offset & Buffer Mitigation Bank). The Statement of Availability from
the mitigation bank has been included as part of this application.
To assist in your review of this modification request, the following information has been included:
• Signed Agent Authorization Form
• Revised Plan Sheets
• Revised Permit Impact Drawings
• Mitigation Bank Statement of Availability
If there is any additional information you need to assist in the processing of this permit modification request,
please do not hesitate to contact me at [phone] or [e-mail].
Sincerely,
Kimley-Horn and Associates, Inc.
William Sullivan, PWS
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