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Title: Upper Mississippi River System-Environmental Management Program (UMRS-EMRP) Definite Project Report (DPR) with Integrated Environmental Assessment : Cuivre Island Habitat Rehabilitation and Enhancement Project (HREP), Pool 26, Mississippi River, Lincoln and St. Charles Counties, Missouri
Authors: United States. Army. Corps of Engineers. St. Louis District
Keywords: Restoration ecology
Environmental protection
Environmental management
Mississippi River
Publisher: United States. Army. Corps of Engineers. St. Louis District.
Abstract: The Cuivre Island Habitat Rehabilitation and Enhancement Project is part of the Upper Mississippi River System-Environmental Management Program. The project is located on the Missouri side of the Mississippi River, in Pool 26, about 5 miles downstream of Lock & Dam No. 25. The project area consists of Cuivre Island, Cuivre Slough, Turkey Island chute, and a mainland tract adjacent to Cuivre Island. The project area includes land owned by the Federal government, the State of Missouri, and private landowners. The U.S. Army Corps of Engineers acquired about 70% of the western portion of the island to mitigate for habitat losses associated with the Melvin Price Locks and Darn. The Missouri Department of Conservation acquired the remainder of the island and a tract on the mainland for boat access to Cuivre Slough. The St. Louis District has issued a license to the Missouri Department of Conservation to manage Corps land on Cuivre Island for fish and wildlife purposes. Problems occurring at the project area are high rates of sedimentation in the Cuivre Slough side channel and Turkey Island chute, sedimentation on Cuivre Island, lack of deep water in Cuivre Slough during winter and summer, limited water control capability on Cuivre Island, and loss of marsh habitat in the vicinity of the project area. The objectives of this project are to restore habitat diversity to benefit fish and wildlife species by: maintaining and improving side channel habitat by preventing river-borne sediment from filling side channels, providing overwintering and summer habitat for fish in side channels, increasing habitat quality and quantity of artificially flooded habitats for wetland-dependent wildlife, increasing diversity of wetland types, and maintaining and improving habitat quality and quantity of bottomland forest within the project area. The measures available to address the problems include: dredging of side channels, lakes, and sloughs; dike and levee construction; side channel openings and closures; aeration and water control systems; agitation dredging techniques; timber or tree stand improvement measures; reforestation of cropland; and acquisition of wildlife lands for wetland restoration and protection. This report documents the formulation of specific management measures and evaluates them as to their acceptability to the non-Federal sponsor (MDOC), their completeness, their effectiveness, and their cost per habitat benefit efficiency. The recommended plan consists of 6 measures: improvements to the green tree reservoir on Cuivre Island, construction of 6 dikes on Cuivre Island in Cuivre Slough, removal of a portion of a submerged dike in Cuivre Slough, tree stand improvements and reforestation measures on Cuivre Island, and propwash dredging of Turkey Island chute. Habitat enhancements from the project are estimated to provide a net gain of 788 average annual habitat units (AAHUs) for wildlife and 266 AAHUs for fishes. Initial costs for the project are estimated to be about $1,473,000, and annual operation, maintenance and rehabilitation costs are about $17,000.
Description: Definite Project Report with Integrated Environmental Assessment
Rights: Approved for Public Release; Distribution is Unlimited
Appears in Collections:Environmental Documents

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