Physical and Numerical Model Study of the Little Falls Reservoir, Mississippi River at Little Falls, Minnesota

Abstract

The St. Anthony Falls Laboratory (SAFL) conducted a physical and numerical model study of the Little Falls Reservoir. The Reservoir is located approximately 120 miles northwest of Minneapolis) Minnesota, on the Mississippi River. The testing portion of the study was began in early 1997 and completed in December 1997. Problems related to decreased flow and increased sedimentation are being experienced in the small east channel and the eastern shore of the reservoir. Various agencies have conducted studies of the problems in an effort to determine the cause. SAFL's task was to determine whether the u.s. Highway 10 bypass and bridge constructed in 1975, as well as possible other factors, might be the cause, and provide recommendations for mitigation of the problem. The report presents SAFL's findings and results of its physical and numerical model analysis. This report can be used by others to carry out Environmental Reviews and Permitting.