Closure of Upper St. Anthony Falls Lock to Commercial and Recreational Navigational Traffic
St. Paul District is required to close the USAF to all navigation traffic within one year of the enactment of WRRDA 2014. This requires the lock be closed on or before June 10, 2015. The lock would continue to be operated only for the mitigation of upstream flooding, as outlined by WRRDA. The proposed action is limited to closing the lock for all navigational use, and would not involve lock or dam removal, change in lock ownership, or other more substantial actions.
The U.S. Army Corps of Engineers, St. Paul District, is seeking comments on a Clean Water Act evaluation to make repairs at Lock and Dam 1 in Minneapolis. The Corps is developing plans to repair scouring immediately downstream of the dam. The plan includes placing more than 14,000 cubic yards of rock along the entire width of the dam and up to 150 feet downstream. In all, an estimated three acres south of the dam will be impacted by the project.