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Title: Illinois River Basin Restoration Section 519 Project Implementation Report With Integrated Environmental Assessment : Starved Rock Pool Critical Restoration Project
Authors: United States. Army. Corps of Engineers. Rock Island District.
Keywords: Illinois River (Ill.)
Restoration ecology
Environmental protection
Environmental management
Publisher: United States. Army. Corps of Engineers. Rock Island District.
Abstract: The Starved Rock Pool Illinois River Basin Critical Restoration Project is located in LaSalle County, Illinois, approximately 65 miles downstream of Chicago, IL, in the Illinois River at river miles 231 and 235. Current stressors include sedimentation and increased water levels due to construction of the lock and dam system. These stressors are likely to continue and the quality of aquatic habitat will decline. The opportunity exists to protect and restore habitat for fish and resident and migratory birds before it is lost. The goals of the Project are to: 1. Restore Submerged Aquatic Vegetation in Starved Rock Pool. 2. Increase Area and Quality of Resting and Feeding Habitat for Migratory Waterfowl. 3. Improve Spawning and Nursery Habitat for Native Fish. The objectives of the Project are to: 1. Increase shallow low current velocity habitat in Project area by 2015. 2. Reduce wind fetch lengths and provide areas that are sheltered from wind and wave action by 2015 in the Project area. 3. Increase water clarity in Project area (TSS<25 mg/l, Turbidity < 20 NTU, light extinction< 3. 42 m-1, Secchi disk depth >0.5m ) by 2015. The following enhancement feature was considered to achieve the Project objectives: construct a breakwater in the project area. The design life for this Project is 50 years. Cost and habitat benefits were estimated. Habitat benefits were estimated using Habitat Evaluation Procedures. Cost-effectiveness and incremental analyses were conducted to identify cost-effective plans and reveal changes in cost for increasing levels of environmental outputs. The Recommended Plan provides 361.8 net Average Annual Habitat Units of habitat. The Recommended Plan would restore aquatic habitat by constructing a riprap breakwater on the submersed Delbridge Island to reduce water velocities to protect aquatic vegetation. Implementation of the Recommended Plan would increase the quality and quantity of preferred habitat at this location. The Project outputs meet management goals and objectives and support the overall goals and objectives of the Illinois River Basin Restoration Section 519 Program. Section 519 of the 2000 Water Resources Development Act specifies that first cost funding will be 65% percent Federal and 35% non-Federal. All Project features would be located on state-owned lands managed by the Illinois Department of Natural Resources; responsibility for the operation, maintenance, and repair of the lands is the IL DNR at an estimated average annual cost of $30,432. The Corps of Engineers, Rock Island District, District Engineer has reviewed the Project outputs, a gain of 361.8 net average annual habitat units, and determined that the implementation of the Recommended Plan is in the Federal interest. Therefore, the District Engineer recommends construction approval for the Starved Rock Project at an estimated construction expense of $3 million, including contingency and adaptive management measures. The estimated Total Project Cost, including; planning, engineering and design; adaptive management measures; contingency; and escalation is $4.2 million.
Description: Project Implementation Report with Integrated Environmental Assessment
Rights: Approved for Public Release; Distribution is Unlimited
Size: 534 pages / 110.33 MB
Types of Materials: PDF
Appears in Collections:Environmental Documents

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