Decision Notice: Intake Bypass Channel Scour Repairs 2022 - EA

The U.S. Army Corps of Engineers (USACE) and the U.S. Bureau of Reclamation are proposing to fix five areas of significant erosion that occurred in the Lower Yellowstone Bypass Channel. The erosion occurred during the 2022 runoff season. All five areas will be rebuilt to original lines and grades then reinforced with riprap and bedding material to prevent further erosion from occurring. Construction is expected to begin sometime in January and be completed by mid-April when existing in-water work restrictions kick in. All work will be completed in the wet with no dewatering or coffer dams being necessary.

The proposed work is necessary to ensure the long-term operation of the Lower Yellowstone Bypass Channel which is a project designed to provide passage past Intake Diversion Dam for the endangered pallid sturgeon.

Related Documents

• Decision Notice (PDF)