20220692 Ver 1_More Info Received_20220629

Strickland, Bev
From: Harbour, Jeff W <[e-mail]>
Sent: Wednesday, June 29, 2022 9:42 AM
To: Hopper, Christopher D CIV USARMY CESAW (USA); Homewood, Sue
Cc: David Andrews; Smith, Jeff; Doe, Steven; Cribb, LaRue
Subject: [External] Kurz Site Additional Information
Attachments: 2018 Site Plan Ponds Erosion Control and Details.pdf; C1.0 - WETLAND DELINEATION
MAP (PRE-DEVELOPED).pdf; C2.0 - WETLAND IMPACT MAP (POST-DEVELOPED).pdf;
C3.0 - WETLAND IMPACTS CROSS SECTIONS.pdf; CO.0 - WETLANDS LIMITS
DETERMINATION.pdf
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Chris and Sue,
With great assistance from Thomas & Hutton (engineer) and Edifice (contractor); we were able to find some historical
data for the KURZ site, including the grading plan for the last expansion project, soil boring data and historical imagery
from Google Earth. Based on our analysis, it appears that the old wetland limit line may have generally followed the
original 682 contour line (refer to plan sheet by Hugh Creed Assoc. dated 9/6/2017). Furthermore, geotechnical data
from Borings B-10, B-11, B-12, and B-107 were helpful in identifying original wetland soils that may have been present in
the area. B-107 showed signs of wetland soil conditions below the fill material, but B-10,11 and 12 did not. Also, please
note that the upland berms surrounding the two sediment basins that we observed, will be removed using small
mechanized equipment to lessen the potential for disturbance in those areas. The areas that were subject to fill will be
returned to natural grade based on the abutting wetlands that are present alongside these sediment basins.
The maps that are provided here include the following:
• CO.0—This map is intended to depict the approximate limits of the wetlands onsite that we looked at and is a
revision to the original delineation map based on areas that we removed from 404 jurisdiction. Coordinates that
you collected and your guidance received while onsite were used to help revise this map of the wetland
limits. This map also includes the two areas that we believe may have been wetlands prior to the last project
expansion.
• C1.0—This represents a revision to the delineation based on the same info mentioned above for CO.0
• C2.0—This is the revised wetland impact map. Two impact areas have been removed as a result of us reviewing
those areas and determining that the areas did not meet wetland criteria. This leaves Impacts Areas 1, 2, and 3
proposed as part of the new expansion. Impacts 1-3 total 0.27 acre. Impact Areas 4 and 5 are the result of our
best professional judgment regarding possible past wetland impacts. Impacts 4 and 5 total 0.08 acre. We are
proposing to account for this 0.08 acre of past impact with the current, new impacts. Therefore, the total
amount of wetland impact that is being requested is 0.35 acre. Compensatory mitigation will be provided at a
2:1 ratio and the Statement of Availability has previously been provided to you to cover 0.35 acre of impact at a
2:1 ratio for this project.
• C3.0 — Wetland impact cross sections
• 2018 ESC Plan
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We hope that this revised information resulting from our site visit plus the forensic assessment to estimate past impacts
will be received favorably and will allow you to continue your review of the permit application. Let us know if you have
any further questions.
Jeff Harbour, PWS
Senior Scientist I Natural Resources
2401 Brentwood Road, Suite 107 I Raleigh, NC 27604
D [phone] I M [phone]
jeff.harbour©terracon.com I Terracon.com
tIr Ell 0 ICI
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