From Wyoming Department of Environmental Quality <[email protected]>
Subject Public Notice: Proposed Temporary Turbidity Increase in the Yellowstone River and Lost Creek
Date July 17, 2025 2:01 PM
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PROPOSED TEMPORARY TURBIDITY INCREASE IN THE YELLOWSTONE RIVER AND LOST CREEK

The Wyoming Department of Environmental Quality (WDEQ) has received a request from the Federal Highway Administration for a temporary increase in turbidity in the Yellowstone River and Lost Creek in Yellowstone National Park, Wyoming. The temporary increase in turbidity is associated with removal of existing bridge piers on the Yellowstone River along with restoration and installation of a fish barrier along Lost Creek.

Activities in cold water streams like the Yellowstone River and Lost Creek are normally limited to a ten (10) NTU increase over background. Approval of this request would allow an exceedance of this limit for up to forty (40) total working days for the combined streams, subject to monitoring and reporting. This activity will follow the procedures in Chapter 1, Section 23(c)(ii), of the WDEQ Water Quality Rules, which allow for temporary elevated levels of turbidity in certain circumstances. The applicant has secured a U.S. Army Corps of Engineer 404 permit for the project.

Requests for information about the proposed temporary turbidity increase should be directed to Eric Hargett by email *(**[email protected]* <[email protected]>) or phone (307-777-6701). Written comments must be addressed to Eric Hargett, Wyoming DEQ/WQD, 200 W. 17th Street – 4TH floor, Cheyenne, WY, 82002, and be postmarked on or before 5:00 p.m. on XXX XX, 2025 to be considered. Electronic comments may only be submitted through and accepted by the Wyoming DEQ comment portal provided at *[link removed] [ [link removed] ]*. Phone comments will not be accepted.

*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 public comment period for such requests. " 


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This email was sent to [email protected] using GovDelivery Communications Cloud on behalf of: Wyoming Department of Environmental Quality · 200 West 17th St.· Cheyenne, WY 82002 GovDelivery logo [ [link removed] ]
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