River Access Is Temporarily Restricted For River Mile -12 Slough Construction
On March 1, 2025, Glen Canyon National Recreation Area will begin construction to channelize the river mile -12 slough to prevent smallmouth bass reproduction in the Colorado River below Glen Canyon Dam.
Construction is planned to start on March 1 and be completed by June, with equipment staging in preparation for construction to begin as early as February 26. Access to the river may be temporarily restricted during the equipment staging period only. Further details about delays and other project updates will be shared on the park’s website.
The slough modification project was reviewed in the Warmwater Nonnative Fish Management Plan/Environmental Assessment (EA), which was open for public feedback in September 2024.
The park reviewed and considered all comments before finalizing their decision in a Finding of No Significant Impact (FONSI). The FONSI and associated EA have been prepared in compliance with the National Environmental Policy Act to evaluate potential issues and impacts on the area’s resources and values.
For more information, please visit:
https://parkplanning.nps.gov/
