20190062 Ver 1_More Info Received_20190308

WETLANDS
j-
4we & WATERS
Mr. David Bailey
US Army Corps of Engineers
Raleigh Regulatory Field Office
3331 Heritage Trade Drive, Suite 105
Wake Forest, NC 27587
RE: SAW -2018-01856
Verona Subdivision
Request for Additional Information
Burlington, Guilford County
Mr. Bailey and Ms. Homewood,
Ms. Sue Homewood
NC Division of Water Resources
Winston Salem Regional Office
450 W. Hanes Mill Rd. Suite 300
Winston Salem, NC 27105
March 8t", 2019
Below is a response to the request for additional information for the project referenced above. Included
is the original request, along with a response to each question. Supporting information and modified
plans have been included as attachments as necessary.
1) Your PCN and plans propose a discharge of fill material into 0.476 acre of riparian,
non-riverine wetlands for road crossings and fill/grading for Lots 29, 53, 71, 72, and 103-
107. You have not demonstrated avoidance and minimization to the maximum extent
practicable for the proposed wetland impacts related to these Lots, as required by NWP
General Conditions 23(a) and (b).
Project has been redesigned such that permanent impacts to jurisdictional wetlands have
been reduced to 0.188 acres, representing approximately a 60% decrease from original
proposed impacts. The applicant proposes that in light of this additional avoidance and
minimization, and given the low quality of the wetlands on site, a 1:1 ratio for
compensatory mitigation be applied. See below for discussion of specific further
avoidance and minimization techniques.
a. It is not clear that project viability is dependent on the inclusion of 9 lots, when the
overall development proposes 129 Lots. Please provide additional information to this
effect. The plans do not show any indication that attempts were made to avoid impacts
to Wetland Area 3, or the top of Wetland Area 2. Could the project be redesigned to
eliminate Lot fill for any of these areas? If project plans are changed as a result of this
evaluation, please provide the updated PCN and plan sheets as necessary.
Project has been redesigned such that lots 103 and 104 have been combined to result
in one single lot (now 103) that has been re -oriented in order to avoid impacts to
jurisdictional wetlands.
b. Several of these Lots, including 53 and 105-107, could potentially support a dwelling
and access without impacting wetland areas. Could measures such as retaining walls or
other means be used to limit fill and grading activities within these Lots to upland areas,
thereby minimizing wetland impacts?
Project is now designed to utilize retaining walls on the backs of lots 103, 104, 105,
106 and 53 such that impacts to wetlands in these areas are avoided.
CHRISTOPHER HUYSMAN
1 70 DEW DROP ROAD
SPARTA, NC 2B675
336.406.0906
CHRIS. [e-mail]
WETLANDS & WATERS, INC.
TAMP BANDY
41 OB LB PROPST DRIVE
CONOVER, NC 2B61 3
B2B.302.3437
[e-mail]

c. Will remaining wetland areas (particularly Wetland Area 2) retain hydrology to
remain jurisdictional, or would grading/storm water plans redirect water such that
wetland areas will lose their hydrologic inputs?
Project includes a bypass of an offsite storm system near lot 57 that will ensure the
Wetland Area 2 will continue to receive hydrologic input from the upstream resident
watershed. This storm system is designed to have a parallel discharge through a
riprap apron and vegetated common open space to ensure low velocities.
2) Regarding the proposed Stream 1 crossing:
a. We are concerned that Stream 1 could be subject to headcutting above the
proposed culvert given the proposed 1' burial and the stream slope (>2%). Please confirm
with NCDWR regarding whether or not culvert burial is required/advisable in this
situation. If burial of the culvert pipe is not advised, please redesign accordingly and
update the PCN and applicable plansheets;
Given the concerns over the potential for headcutting, the applicant proposed not to
bury the culvert crossing. The primary concern from NCDWR and NCWRC was passage
of aquatic life. Given the intermittent nature of the tributary in question, as well as
the impaired quality due to ongoing agricultural operations, it was determined that
this feature does not contain conditions well suited to an abundance of aquatic life. A
site visit with NCWRC on 02/19/19 confirmed this and that placement of the culvert at
grade was acceptable.
b. Please adjust the Stream 1 crossing profile view on Sheet W3 to show how the rip
rap pad will tie in with the existing stream grade. Further, please add a note to the
profile and plan view plansheets for the Stream 1 impact (Sheets W3 and WSJ that
clearly states that the rip rap pad within the stream channel will be imbedded into the
streambed substrate such that low water flow will flow over the top of the rip rap (this
should promote aquatic life passage following installation of the road crossing);
Project plans have been updated to reflect rip -rap apron at existing stream grade.
c. Please provide a longitudinal cross-section of the rip rap pad to demonstrate how
the feature will comply with NWP 29 Regional Condition 3.6.4 (see attached picture as
an example),
See attached plan sheet W8.
3) In Section C.3 of the PCN, please further itemize proposed impacts, and add these
itemizations to the plan sheets. The total line items in this section should include the following:
a. Stream 1 Crossing culvert, rip rap pad, and temp impacts/dewatering (3 items);
b. Stream 2 Crossing culvert and temp impacts/dewatering (2 items);
c. sewer line trenching/temporary crossing,
d. Wetland Area 1 fill/riprap
e. Wetland Area 2 road fill and lot fill (2 items)
f. Wetland Area 3 road fill and lot fill (2 items)
Section C of the PCN has been updated to reflect itemized impacts.
4) There is a discrepancy on Sheets W1, W2, W4, and W5 regarding the existing culvert pipe
under US 70 and the new proposed pipe extension into Stream 2. Is the existing pipe and
proposed pipe extension pipe 15" or 24"? Further, the Sheet W4 profile view shows that 30.21.f.
of pipe will be added, whereas the Sheet W4 plan view shows an impact to Stream 2 of only 29
Lf; please explain/correct this discrepancy and update the PCN/plans;
Project plans have been updated to correct these discrepancies.
CHRISTOPHER HUYSMAN WETLANDS & WATERS, INC•
TAMP BANDY
1 70 DEW DROP ROAD
41 OB LB PROPST DRIVE
SPARTA, NC 2B675
CONOVER, NC 2B613
336.406.0906
B2B.302.3437
CHRIS. H [e-mail]
[e-mail]

S) Wetland LWL 1 along Stream 2 is not shown on Sheets W1 and W2. Does this feature occur
within the subject property? If so, please add this feature to these Sheets.
Project plans have been updated to depict the linear wetland feature.
6) Please provide a vicinity map that shows the full extent of the proposed 8" sanitary sewer
extension from the proposed development to the existing sewer infrastructure. This exhibit will
allow our office to determine if a site visit is necessary to verify the location and extent of
potential waters of the US;
Project plans have been updated to depict the sanitary sewer extension. This sewer
connection will utilize a directional bore underneath the tributary that originates on site (as
depicted on sheet W2), with a temporary disturbance to tie into existing off-site system (as
depicted on sheet W6).
7) Given the addition of Schweinitz's sunflower (Helianthus schweinitzii) to USFWS's list of
Endangered, Threatened, and Candidate Species, and Federal Species of Concern for Guilfrod Co.,
and due to potentially suitable habitat for this species occurring in the project area, we will
initiate informal consultation with the USFWS. Please note that the Corps cannot verify the use
of a NWP until Section 7 consultation is complete.
USFWS concurs with Army Corps effect determination of May Affect, Not Likely to Adversely
Affect for Schweinitz's sunflower, per email on 02/08/19.
Please do not hesitate to let me know if you have any questions about the provided information.
Best regards,
Perry Isner
704.773.4239
Enclosures: Revised Permit Plan Drawings
Revised Section C of Pre -Construction Notification
CC via email: Olivia Munzer, NC Wildlife Resources Commission
Greg Davidson, Eastwood Homes
CHRISTOPHER HUYSMAN WETLANDS & WATERS, INC• TAMP BANDY
1 70 DEW DROP ROAD 41 OB LB PROPST DRIVE
SPARTA, NC 2B675 CONOVER, NC 2B613
336.406.0906 B2B.302.3437
CHRIS. H [e-mail] [e-mail]

5TREAM5
INTERMITTENT
5TREAM NO.1
491 LF
BUFFER ZONE I
32,666 5F
BUFFER ZONE 2
23,360 5F
TOTAL BUFFER AREA
56,026 3F
5TREAM NO.2
135 LF
BUFFER ZONE 1
5,103 5F
BUFFER ZONE 2
4,1015F
TOTAL BUFFER AREA 10,404 5F
WETLAND5
TOTAL WETLAND AREA 66,189 ± 5F
LEGEND
5TREAM/POND BUFFER ZONE I
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TOTAL 51TE AREA: 4b.55 AG±
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I. NO CON5TRUGTION TO BE61N UNTIL ALL NEGE-55ARY 51TE DEVELOPMENT
PERMITS ARE OBTAINED (INGLUDIN6 A GRADING PERMIT FROM NGDEQ).
2. FOLLOW THE APPROVED ER05ION GONTOL PLAN AND SEQUENGE IN ORDER
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4. ENSURE THAT A COFFER DAM AND PUMP AROUND 15 IN5TALLED TO DIREGT
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PLAN TO ENSURE THAT NO OFF-51TE SEDIMENTATION OGGUR5 DURING GON5TRUGTION.
8. 51TE SHALL BE STABILIZED IN A TIMELY MANNER A5 PER THE REQUIREMENTS
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PERMIT5 ARE OBTAINED (INGLUDIN6 A 6RADIN6 PERMIT FROM NGDEQ). GON5TRUGTION 5EQUENGE ON THI5 PLAN AND/OR A5 PER ANY 5UB5EQUENTLY
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TO CLEAR AND 6RADE THE 51TE. 15 TO PROVIDE ADEQUATE GON5TRUGTION NOTE5 AND DETAIL5 5UGH THAT
3. INSTALL 51LT FENCE ALON6 THE LIMITS OF 015TURBANGE WITHIN THE IMPACT AREA. THE GONTRA(TOR GAN ALLOW THE EXI5TIN6 DRAINAGE THAT RUNS FROM
4. ENSURE THAT A GOFFER DAM AND PUMP AROUND 15 IN5TALLED TO DIRECT NORTH TO SOUTH ALONG THE 5TREAM TO GONTINUE TO FLOW THROU6H THE
RUN-OFF 1?RAINA6E FROM THE WETLAND5 THROU6H THE 51TE. 51TE UNTIL THE NEW STORM 5EWER 15 IN-PLACE AND FUNCTIONAL.
5. COFFER DAM AND PUMP AROUND MUST BE LEFT IN PLACE UNTIL NEW 24" RGP
5TORM 5EWER PIPE5 ARE INSTALLED. 5EE DETAIL ON SHEET W-5.
6. 6RADE 51TE 5UFFIGIENT TO ALLOW FOR THE IN5TALLATION OF THE PROPOSED
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1. G.ONTRAGTOR TO FOLLOW THE DETAIL5 OF THE APPROVED ER05ION CONTROL
PLAN TO ENSURE THAT NO OFF-51TE SEDIMENTATION OC6UR5 DURIN6 GON5TRUGTION.
8. 51TE SHALL BE STABILIZED IN A TIMELY MANNER A5 PER THE REQUIREMENTS
OF THE APPROVED ER05ION GONTROL PLAN AND THE APPLICABLE
NGDENR 5TANDARD5 AND RE6ULATION5.
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DURING DRY GONDITION5. HOWEVER, IF NEGE55ARY,
U5E A GOFFER DAM W/ PUMP AROUND.
I145TALLATION NOTES
A. INSTALL 5ANDBA65 DAM UP5TREAM OF CULVERT AND
PUMP WATER INTO DOWN5TREAM.
B. REMOVE GOFFER DAM AND PUMP AFTER AFTER BY-PA55
STORM 5EWER 15 FULLY FUNGTIONAL.
WETLAN05 AREA
IMPAGT 1,440 5F
RIP RAP TO BE EMBEDDED INTO
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U5E A GOFFER DAM W/ PUMP AROUND.
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621 Eugme C—t, Swk 100, C—b—, NC 27401-2711
PO Hos 21882 Camsb—, NC 27420-1892
/ Ph— 336-275-0471 Eu; 336-275-3719
/ web: +sww.borim-wede.com
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NOTE: AS BEST P0551BLE, INSTALL 5TORM SEWER
DURING DRY CONDITION5. HOWEVER, IF NEGE55ARY,
U5E A COFFER DAM W/ PUMP AROUND.
INSTALLATION NOTE5
A. IN5TALL 5ANDBA66 DAM UP5TREAM OF CULVERT AND
PUMP WATER INTO DOWNSTREAM.
B. REMOVE COFFER DAM AND PUMP AFTER AFTER BY—PA55
5TORM 5EWER 15 RLLY RWTIONAL.
LIMIT5 OF
23 LF OF TE
IMPACT5
5AND BA6
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OFF5ITE TEMP 015TURBANGE
TO INSTALL 5ANITARY 5EWER OUTFALL
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IS" 5ANITARY SEWER
(61135ONVILLE)
585
DATUM ELEV
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Engineers
64 Planners
�I Surveyors
w p) Borum, Wade and Associates, P.A.
* I A \ ' 621 Eugme C—t, 5wk 100, Cn'eemb—, NC 27401-2711
AGT 6,�ab 6� 6 PPh-219.25-W1 m, 33274201862
Phone; 336-275-0471 Eu; 336-275-3719
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21" DEPTH OF GLA55 "I"
RIP RAP TO BE EMBEDDED INTO
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C. Proposed Impacts Inventory
1. Impacts Summary
1 a. Which sections were completed below for your project (check all that apply):
❑X Wetlands ❑X Streams — tributaries ❑X 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
2d.
Forested
2e.
Type of jurisdiction
Corps (404,10) or
DWQ (401, other)
2f.
Area of
impact
(acres)
W1 P
Culvert
Headwater Wetland
No
Corps
0.033
W2 P
Fill
Headwater Wetland
No
Corps
0.01
W3 P
Fill
Headwater Wetland
No
Corps
0.145
W4
Choose one
Choose one
Yes/No
W5
Choose one
Choose one
Yes/No
W6
Choose one
Choose one
Yes/No
2g. Total Wetland Impacts:
0.188
2h. Comments:
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)
S1 P
Culvert
UT to Back Creek
INT
Corps
3
89
S2 P
Stabilization (riprap)
UT to Back Creek
INT
Corps
3
25
S3 P
Culvert
UT to Back Creek
INT
Corps
3
27
S4 T
Sewer Open -cut
UT to Back Creek
PER
Corps
5
23
S5
Choose one
S6
Choose one
3h. Total stream and tributary impacts
164
3i. Comments:
Permanent impacts are limited to 141 linear feet for purposes of a subdivision road crossing and widening of Hwy. 70. Following temporary impacts
for purposes of open -cut sanitary sewer installation, stream bed and banks will be restored to original contours and immediately stabilized per the
specifications of the erosion control plan.
Page 4 of 10
PCN Form — Version 1.4 January 2009