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U.S. Army Corps of Engineers
St. Paul District
Programs & Project Management
332 Minnesota St., Suite E1500
St. Paul, MN 55101

(651) 290-5755

cemvp-pm@usace.army.mil

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Tag: Mississippi River
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  • April

    Aquatic Ecosystem Restoration: Section 1135, Leech Lake Dam Fish Passage, Minnesota

    The purpose of the project is to provide hydraulic connectivity for aquatic organisms to pass from the Leech River upstream to Leech Lake.

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

    This work will determine whether continued operation and ownership of Lower St. Anthony Falls Lock and Dam and Lock and Dam 1 are in the federal interest, and if not, consider alternatives for disposal of the property.
  • Upper St. Anthony Falls Lock and Dam, Minneapolis, Minn.

    Disposition Study: Upper St. Anthony Falls and Lock and Dam, Upper Mississippi River

    This work will determine whether continued operation and ownership of the Upper St. Anthony Falls Lock project is in the federal interest, and if not, consider alternatives for disposal of the property.

  • Dredged Material Management Plan: Pool 2, Minnesota

    The purpose of the Pool 2 Dredged Material Management Plan is to prepare a coordinated long-term plan for managing dredged material in Pool 2. This plan was initiated due to increases in dredging volumes throughout Pool 2. Furthermore, three temporary placement sites for dredged material need to be excavated in Lower Pool 2.

  • Dredged Material Management Plan: Pool 9, Minnesota/Wisconsin/Iowa

    The U.S. Army Corps of Engineers operates and maintains the Upper Mississippi River 9-Foot Channel Navigation Project, and one method used to maintain the 9-foot channel is dredging river soils or “material.” The purpose of the Pool 9 Dredged Material Management Plan is to prepare a coordinated long-term plan for managing dredged material in Pool 9. This plan was initiated due to needs for dredged material management at upland placement sites, especially in the upstream reach of the pool.

  • Invasive Carp, Upper Mississippi River

    Bighead and silver carp were introduced to the Mississippi River in the 1970s after wastewater treatment ponds were overcome from flooding on the lower Mississippi River. Left uncontrolled, the invasive carp’s feeding habits starve other species and cause turbidity in the waters where they feed, detrimentally altering the habitat that supports native species. Left unchecked, it is concern that the invasive species will continue to expand further upstream into the upper Mississippi and Ohio Rivers. The purpose of this project is to monitor and limit the spread of invasive carp species.
  • Mississippi River Headwaters reservoirs

    Mississippi River Headwaters Reservoirs, Minnesota

    The Mississippi River Headwaters Project consists of six headwaters dams in north-central Minnesota. The dams were constructed or reconstructed between 1884 and 1913 to aid navigation on the Mississippi River between St. Paul, Minnesota, and Prairie du Chien, Wisconsin. Because the navigation mission of the headwaters dams declined with the creation of the Upper Mississippi River 9-Foot Navigation Channel and recreation grew in importance to the region’s economy, the mission shifted to flood risk management, recreation, and environmental stewardship.

  • Mississippi River Locks and Dams 2–10: Embankment Rehabilitation Adjacent to Structures

    This embankment rehabilitation project addresses restoring embankments to meet current design standards. Overtopping protection adjacent to concrete structures is the priority for design and construction efforts; no increase in the height of the embankments is planned.

  • Mississippi River Locks and Dams 2–10: Miter Gate Replacements

    Locks and Dams 2 through 10 have used the same miter gates since their construction in the 1930s. Over time, the gates have been damaged and distressed, leading to serviceability and safety issues. This project will replace the gates and upgrade the anchorage systems, increasing navigational longevity and operational readiness while decreasing repair costs and downtime due to maintenance or failure.

  • Mississippi River Locks and Dams 2–10: Nonstructural Embankment Repairs

    A draft Problem Appraisal Report completed in 2017 found that complete riprap overlay of the embankments to rehabilitate rock degradation was not economically justified but that there are other opportunities to improve scour resilience while improving the ecosystem. Some options include creating upstream berms, creating islands to reduce wave fetch, and providing submergible segments with crest superiority at some dams.

  • Mississippi River Locks and Dams 2–10: Tow Rail System

    The tow rail system is integral to the operation of Mississippi River Locks and Dams 2 through 10. At each lock, a tow rail system is attached to the top of the lock guidewall to help guide tows through the lock chamber. The tow rail systems of Locks and Dams 2 through 10 have been deteriorating over the past several years, requiring rehabilitation of these systems.
  • St. Paul District forester Bobby Jackson installs a sign on Lock and Dam 3 mitigation property near Maiden Rock, Wis. The recent construction of navigation improvements on the embankments at Lock and Dam #3, resulted in the loss of vital environmental features in the floodplain. As part of our efforts to mitigate these impacts, the St. Paul District purchased 520 acres along the Rush and Trimbelle Rivers in Pierce Co., Wis., restoring 313 of those acres back to native floodplain forest. This isn’t unique to the district. Read more about another reforestation project on a Mississippi River island near Red Wing, Minn.: http://go.usa.gov/WB3W

    Mississippi River Recreation and Environmental Stewardship

    Although navigation was the initial purpose of the Upper Mississippi River 9-Foot Channel Navigation Project, Congress has since authorized the development of recreational facilities, protection of forest resources, and required the consideration of fish and wildlife conservation.

  • Navigation: Mississippi River End Cells

    The Lock Guidewalls-Distress Repair Recommendations project for Locks and Dams 2 through 10 has been ongoing since the mid-1990s. The purpose of the end cell projects is to extend the longevity of each site and to reduce operability issues and required maintenance

  • Navigation: Mississippi River Lock and Dam 7 Outdraft

    In 2017, a hydraulic study was launched to identify potential causes of the increased outdraft at Lock and Dam 7 and to investigate and implement measures to alleviate the condition. Flow measurements collected over the last 30 years indicate a significant shift in flows just upstream of Lock and Dam 7, with nearly 20% more flow coming through the existing navigation channel, which must then exit through the dam, exacerbating the outdraft condition.

  • Navigation: Routine Dam Gate Maintenance

    Maintenance of dam spillway gates are required to avoid degradation and eventual replacement. Cost analyses show it is economically favorable to maintain these gates rather than replace them. There are also reliability and safety concerns with allowing the gates to degrade to the point that they must be replaced.

  • Upper Mississippi River Restoration Program: Reno Bottoms Habitat Restoration, Pool 9, Minnesota/Iowa

    The objective of this project is to protect, restore or create resilient and diverse bottomland forests. The quality and extent of the unique forest and aquatic habitat in the Reno Bottoms project area has been declining over the past several decades. Human-caused changes in hydrology, land use, and climate have increased water levels within the project area. Without action, the project area will continue to degrade.

  • Upper Mississippi River Restoration Program: Robinson Lake Habitat Restoration, Pool 4, Minnesota

    Sedimentation of the backwater lakes of the Upper Mississippi River, including the lower Pool 4 area, is an ongoing issue. Potential sources of sand are the Chippewa River, historic channel maintenance dredging side-cast islands and the four active temporary placement sites within the study area. The extent of open water has been shrinking in Robinson Lake.