HomeMy WebLinkAbout20201654 Ver 4_Permit_Modification_final_07022024_20240702CLearWaLer
An EnviroScience CompanyM
ClearWater Environmental Consultants, Inc.
www.cwenv.com
July 2, 2024
District Engineer, Wilmington Regulatory Division
Attn.: Mr. Scott Jones
69 Darlington Avenue
Wilmington, North Carolina 28403
Ms. Stephanie Goss
NC DWR, 401 Permitting & Buffer Unit
512 N. Salisbury Street, 9th Floor
Raleigh, North Carolina 27604
RE: Permit Modification
Mulberry Gap Farms — School of Wisdom and Enlightenment
USACE Action ID. SAW-2020-00632, DWR Project No. 2020-1654v2
Madison County, North Carolina
Dear Mr. Jones and Ms. Goss,
A permit application requesting written authorization for impacts associated with the Mulberry Gap
Farms project was submitted by ClearWater Environmental Consultants, an EnviroScience
company (ClearWater), on behalf of Mulberry Farm — Madison LLC on January 27, 2022. The
US Army Corps of Engineers (Corps) issued the requested 404 permit on February 15, 2023, and
the NC Division of Water Resources (DWR) issued the requested 401 Water Quality Certification
on September 22, 2022. On May 31, 2023, ClearWater submitted a permit modification to remove
stream impact S1 (41 LF) for a traffic turnaround change, remove stream impacts S8-S9 (193 LF
— 0.018 AC) due to site redesign, and to authorize stream enhancement for Thomas Branch. This
permit modification was authorized by the Corps on August 16, 2023, and the DWR on July 18,
2023.
Mulberry Farm and the project team have finalized detailed plans associated with a small reach
of Thomas Branch to be relocated as well as two additional culvert crossings and a culvert
replacement. These impacts are below the threshold for stream and wetland mitigation. The
requested changes as are follows:
Two additional culvert stream crossings are being requested and are shown as S36 (40
LF; 0.001 AC) and S37 (20 LF; 0.001 AC) on the attached plan sheet (L-1.13). The
applicant had been planning on using the existing road, however, the utilities and cabin
infrastructure are not compatible due to the constraints including width of the road and
proximity to the stream. The locations of these proposed culverts were previously installed
as temporary construction access culverts. The Corps was notified of these temporary
culverts via email on December 18, 2023.
145 7t' Avenue West, Suite B
Hendersonville, NC 28792
828-698-9800 Tel
SAW-2020-00632; DWR No. 2020-1654v2
July 2, 2024
Page 2 of 2
2. As stated in the previous permit modification request, the applicant included stream impact
S1 (41 LF) to facilitate a cul-de-sac turnaround for traffic. Further inspection by NCDOT
determined that a T-turnaround was sufficient. As a result, the applicant is going to replace
(maintenance) the existing 80 LF culvert with a new 80 LF culvert. Since the prior permit
modification in May 2023, further inspections raised concerns about a small reach of
Thomas Branch below this culvert and its proximity to the road. The existing channel was
historically entrenched and straightened, and its current alignment is very close to the
existing road (see Sheet L-1.13 and Headwaters Eng. Plan). By relocating the outlet and
building an appropriately designed natural channel, the stream will be enhanced with wider
vegetated buffers, wider bankfull width, and the existing road will be less likely to be
washed out or fail in the future. This realignment will result in 130 LF of permanent stream
impact to fill in the old channel (S38, 0.009 AC) and permanent wetland impact W13 (0.008
AC) for a small section of wetland that will intersect with the realigned stream channel.
Should you have any questions regarding the attached resubmittal please do not hesitate to
contact me at 828-698-9800.
Respectfully,
R. Clement Riddle, P.W.S.
Senior Scientist
cc: Sue Homewood, NCDWR
Attachments:
Revised Figure L-1.00 - L-1.15
Headwaters Engineering Stream Relocation Plan & Profile
MDG Engineering Plan Set
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