Wetland and Stream Delineation Report - Tamsin Ridge Solar and Storage Project
Regulatory framework
Discharges of dredged or fill material into waters of the United States need a Section 404 permit from the Corps.
Linear crossings with small impacts can use a nationwide permit (NWP 12 for utility lines in the 2021 reissuance,
NWP 14 for road crossings). A Section 401 water quality certification from Ohio EPA accompanies each Corps
permit; Ohio EPA's certification of the current nationwide permits covers small impacts that meet its conditions.
Filling an isolated wetland needs an Ohio EPA isolated wetland permit, and any impact to a Category 3 wetland
needs Ohio EPA's individual review.
Recommendations
Quote starts. The draft layout dated May 8, 2023 avoids all five wetlands and keeps the ODNR buffers. Quote ends. The two collection line
crossings of Sallow Creek are planned as HDD bores of about 900 feet, entering and exiting outside the riparian
forest, so no permit is needed for them if no frac-out occurs. The access road crossing of S-4 is the only planned
fill: about 40 linear feet of ephemeral channel (0.02 acre), within NWP 14 without pre-construction notification.
If the layout changes so that W-3 or its 300-foot buffer is affected, Ohio EPA individual review and compensatory
mitigation would be needed, with a schedule effect of six months or more. Corvane recommends that W-3 and
its buffer be fixed as a no-build area.
A preliminary jurisdictional determination request should be submitted to the Huntington District with this report.
Delineations are generally valid for five years.
Prepared by: Linnea Barrow, PWS, Senior Wetland Scientist. Reviewed by: Owen Castellane, Principal.
Corvane Environmental, Inc. - Project 23-114 Page 3 of 3
The page
The outline marks where the quote begins on the page.
If W-3 or its 300-foot buffer is affected, Ohio EPA individual review and compensatory mitigation would be needed, with a schedule effect of six months or more.
