From Wyoming Department of Environmental Quality <[email protected]>
Subject Public Notice: Categorical Exclusion Determination, Town of Thayne, Wyoming, North Sewer Line Project
Date June 4, 2025 2:01 PM
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Categorical Exclusion Determination, Town of Thayne, Lincoln County, Wyoming, North Sewer Line Project

The Department of Environmental Quality/Water Quality Division (DEQ) has conducted a review of the proposed North Sewer Line Project in accordance with EPA and State of Wyoming procedures for implementing the State Environmental Review Process.  DEQ has determined that this project is eligible for a categorical exclusion.  Accordingly, DEQ is exempting the project from further substantive environmental review requirements under the State Environmental Review Process.  Neither an Environmental Assessment/Finding of No Significant Impact nor an Environmental Impact Statement/Record of Decision will be required for the proposed action.  The following is a brief description of the situation and the proposed action and a brief statement of how the action meets the criteria for a categorical exclusion.

This project includes the installation of new sewer main lines to service the north section of the Town, which currently does not have access to Town Sewer. Based on current cost estimates, the Town plans to borrow $925,000 from the Wyoming Clean Water State Revolving Loan Fund administered by the Wyoming Office of State Lands and Investments. Principal Forgiveness is expected to be $585,000.  Existing Sewer Funds will be used to repay the loan. Loan terms will be 1.5% interest rate and 20 years.

The Town of Thayne is aware of and accepts the fact that they will be responsible for any required mitigative actions associated with the project, including but not limited to storm water runoff, erosion control, archeological/historic artifacts, and air quality concerns.  These actions will be part of the standard State Revolving Funds Program contract conditions. 

DEQ is granting an exclusion because the existing project will have minimal impact to the proposed lands affected and a large portion of this project occurs on the same property as the currently existing sewer lagoons. DEQ has determined that exempting the proposed project from further review under the State Environmental Review Process will not result in adverse impacts to the population or the area of Thayne and Lincoln County, Wyoming.

The documentation to support this decision will be on file in the DEQ Cheyenne Office and is available for public scrutiny upon request.  Comments concerning this decision may be addressed to:

Gregory Croker, SRF Project Manager
Department of Environmental Quality
200 W. 17th St.
Suite 200
Cheyenne, WY 82002
Tel. (307) 777-6941
FAX (307) 635-1784
email: *[email protected]*

*Para español, visite **deq.wyoming.gov* [ [link removed] ]". Americans with Disabilities Act: special assistance or alternative formats will be made available upon request for individuals with disabilities.  Please provide at least fourteen (14) days before the close of the public comment period for such requests."



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