US Army Corps of Engineers
St. Paul District

Projects

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  • March

    Disposition Study, Lower St. Anthony Falls Lock and Dam, and Lock and Dam 1, Upper Mississippi

    A Section 216 study will investigate the appropriate future disposition of Lower St. Anthony Falls (LSAF) Lock and Dam and Lock and Dam 1, located on the Mississippi River in Minneapolis, Minnesota. The LSAF Lock and Dam was constructed as part of the Minneapolis Upper Harbor project in 1956 as authorized by the Rivers and Harbors Act of 1937. Lock and Dam 1 was originally constructed in 1917 and was modified in 1932 under the authority of the River and Harbor Act of 1930. The U.S. Army Corps of Engineers operates and maintains the two sites. Both locks have been affected by the decrease in the demand for navigation services stemming from the closure of Upper St. Anthony Falls Lock and Dam on June 9, 2015. This disposition study will examine the benefits and costs of continuing to operate LSAF and Lock and Dam 1.
  • Mississippi River Locks and Dams 2–10 Non-Structural Embankment Repair

    Non-structural embankment repair projects at Locks and Dams 2 through 10 will address restoring embankments to meet current design standards. Most dam embankments are currently protected from the erosive forces of water by a layer of riprap placed along the embankment’s length. When the riprap eventually erodes, the embankment itself will erode if more protection is not added. The U.S. Army Corps of Engineers has designed and placed berms and small islands to assist in reducing wave action and wind fetch within pools created by the locks and dams. Reducing these forces increases the longevity of the embankment protections.
  • October

    Sandy Lake Dam Rehabilitation Project

    Sandy Lake Dam is a significant hazard dam located on the Sandy River in Aitkin County, Minnesota, 1.25 miles upstream of the junction between the Sandy River and Mississippi River. The dam’s original purpose was to provide supplemental flow to the Mississippi River during periods of low river stages for navigation. Construction of the locks and dams downstream of Minneapolis in the 1930s reduced the need for upstream storage for navigation, and since then Sandy Lake Dam’s purpose has shifted to flood control, recreation, fish and wildlife conservation, and water supply.
  • Mississippi River Lock and Dam 5A Embankment and Levee Certification

    The Lock and Dam 5A embankment is located along the Mississippi River about 3.5 river miles above Winona, Minnesota, and about 3 river miles below Fountain City, Wis. FEMA is verifying that all levees recognized as providing protection from the base flood meet the requirements outlined in 44 CFR 65.10. This code requires that specific structural requirements must be certified by a registered professional engineer or a federal agency with responsibility for levee design. The City of Winona is performing this certification for the flood risk management project with the Corps providing an analysis of the Lock and Dam 5A embankment in support of that certification.
  • Tribal Partnership Program (TPP): Little Minnesota River Assessment of Fish Migration

    Fish migration up the Little Minnesota River has ceased, which is of great concern to the Sisseton band of the Dakota. This study aims to determine the cause of the lack of migration and identify potential solutions. The study area for this project is the Little Minnesota River between Big Stone Lake and the Sisseton Wahpeton Oyate Lake Traverse Reservation, which is approximately 200 miles northwest of Minneapolis, Minnesota, and 158 miles north of Sioux Falls, South Dakota. The primary area of concern is located in Roberts County, South Dakota, and just outside of Browns Valley, Minnesota, in Traverse County and Big Stone County, Minnesota.