| Projects & Studies
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Asian Carp Barrier System, Upper Mississippi River
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Capoli Slough Habitat Project, Pool 9, Wisconsin
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Cedar Lake, Wisconsin, Water Quality Study
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Channel Dredging near Atchafalaya Bluff - Pool 9, Mississippi River - Crawford County, Wisconsin
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Corps Island Temporary Placement Site Unloading
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Crow River Draft Environmental Assessment
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Drayton Dam Habitat Restoration, Drayton, North Dakota
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Eau Galle Lake, Spring Valley, Wisconsin
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Endangered Species - Conservation of Native Mussels
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Environmental Infrastructure Assistance Program: Section 219, St. Croix Falls, Wisconsin
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Fargo-Moorhead and Upstream Feasibility Study
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Feasibility Study: St. Croix River Headwaters Study, Wisconsin
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Feasibility Study: Sunrise River Watershed Study, Minnesota
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Grand Marais Creek Aquatic Ecosystem Restoration
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Habitat Restoration: Mississippi River, Pool 8 Islands Phase III, Wisconsin/Minnesota
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Habitat Restoration: Mississippi River, Conway Lake, Lansing, Iowa
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Harpers Slough Habitat Project, Pool 9, Iowa
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Hydropower, Crown Hydro, Minneapolis, Minnesota
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Hydropower, Ford Plant, Minneapolis, Minnesota
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Integrated Watershed Study: Minnesota River Basin in Minnesota, South Dakota, North Dakota and Iowa
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Island 116 Channel Closure & Shoreline Stabilization
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Lake Wausau Water Quality Study
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Lake Winneshiek Habitat Project, Ferryville, Wis.
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Lower St. Anthony Falls Rapids Restoration, Mississippi River, Minneapolis, Minn.
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Marsh Lake Ecosystem Restoration Feasibility Study, Lac Qui Parle Wildlife Area, MN
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McGregor Lake Habitat Project, Prairie du Chien, Wisconsin
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Minnesota Flood Control Sites: Lake Traverse, Orwell Lake, Highway 75-Bigstone, Lac qui Parle
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Minnesota River Basin Reconnaissance Study, MN, SD, IA and ND
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Mississippi River Locks and Dams Nos. 2-10 Embankment Rehabilitation
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Mississippi River Recreation and Environmental Stewardship
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Mississippi River, Lock and Dam 3 Fish Passage, Wisconsin and Minnesota
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Mississippi River: Lock & Dam 3 Navigation Safety and Embankment Improvements, Minnesota and Wisconsin
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Mud Lake Water Management
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Navigation: Mississippi River Project – American Recovery and Reinvestment Act Funded Projects, Minnesota/Wisconsin/Iowa
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North Dakota Flood Control Sites: Lake Ashtabula, Homme Lake, Souris River
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North Ottawa Impoundment Project, Grant County, Minn.
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North and Sturgeon Lakes, Habitat Restoration, Pool 3, Minnesota
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Pierce County Shoreline Reclamation – Mississippi River
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Pool 5 Small Scale Dredging and Revegetation
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Red Lake River Fish Passage Project, Clearwater County, Minn.
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Red Lake River Zah Gheeng Marsh, Clearwater County, Minnesota
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Red River of the North Basin: Basin-Wide Watershed Management Planning
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Red River of the North Basin: Minnesota, North Dakota, South Dakota and Manitoba, Reconnaissance Study
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Ruffy Brook Aquatic Ecosystem Restoration, Clearwater County, Minnesota
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Sand Hill River Aquatic Ecosystem Restoration, Minn.
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Section 219, Mille Lacs Wastewater, Minnesota
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St. Croix River: Endangered Mussel Conservation - Zebra Mussel Control
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St. Croix Watershed Reconnaissance Study
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Sturgeon Lake, Pine County, Minnesota, Wastewater Collection and Treatement Facility
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Upper Mississippi River - Illinois Waterway System Navigation Study
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Upper Mississippi River Systemic Forest Management Plan
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Watershed Study: Minnehaha Creek Watershed District, Minnesota
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Wisconsin River Water Quality Study
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Upper Mississippi River Water Level Management Program, Iowa, Minnesota, Wisconsin
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Location/Description
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Construction of a series of locks and dams on the Upper Mississippi River created the 9-foot navigation channel. Over the decades, the lock and dam system has, in general, reduced habitat diversity and resulted in a loss of aquatic vegetation on the impounded portion of the Upper Mississippi River system.
River resource management agencies and the public have expressed a growing interest in summer drawdowns of the navigation pools to promote growth of aquatic vegetation. A drawdown of Pool 8 was implemented during the summers of 2001 and 2002. Monitoring results indicate that the drawdowns were very successful in establishing aquatic vegetation. After 3 years of planning, the St. Paul District, in cooperation with the Water Level Management Task Force of the River Resources Forum, implemented a drawdown of Pool 5 in 2005.
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Status
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A “minor” drawdown of Pool 6 was implemented in 2010 using Operation &Maintenance (O&M) funding and authority. The drawdown was 1.0 foot at Lock and Dam 6 and was initiated on June 18, 2010. River flows were consistently within the range needed to maintain a drawdown, and the drawdown was in effect until September 3, 2010. Preliminary monitoring indicates that up to 200 acres were exposed and that robust plant growth occurred in the exposed mudflats as a result of the drawdown. Additional monitoring will verify the acres exposed and the effects on aquatic plant growth.
The effects on commercial navigation facilities in Pool 6 were minimal because this type of development is all located in the upper portion of the pool, where less effect of the drawdown was experienced. Certain recreational access points experienced challenges with the drawdown. The agency team made every effort to effectively manage these challenges. A working group has been set up to investigate the potential for water level management in Pool 8 and/or Pool 3 and to identify possible funding and authority to study and implement.
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Authority
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The Rivers and Harbors Act of 1930, which authorized the 9-foot navigation channel on the Upper Mississippi River, provides the authority for this work under O&M. The Navigation and Ecosystem Sustainability Program was authorized in the Water Resources Development Act of 2007; it included provisions for water level management.
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Fiscal
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Program Management (O&M)
Total estimated cost (fiscal year 2012) $25,000
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[Printable Copy]
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