Upper Mississipi River Environmental Management Program. Definite Project Report (R-4) with Integrated Environmental Assessment, Andalusia Refuge Rehabilitation and Enhancement, Pool 16, Mississippi River Miles 462 through 463, Rock Island County, Illinois
Abstract
The selected plan for the habitat project consists of constructing a 2-year event levee averaging approximately 6 feet high, 8,600 feet long with top widths of either 12 feet or 60 feet, providing water level control on 130 acres of Refuge land. Included are a pump station capable of pumping 3,500 gallons per minute into the Refuge and 5.000 gallons per minute from the Refuge, one gated water control structure, and an armored lower section of the levee to withstand overtopping of the levee without damage during floods. Mechanical excavation in Dead Slough to a depth approximately 9 feet below flat pool (About 110,000 cubic yards) and in the interior of the MSMU (About 75,000 cubic yards) will create approximately 3.1 miles of channel (10,900 feet within the MSMU and 5,600 feet within Dead Slough). Channel width within Dead Slough adjacent to the levee will be 60 feet at the base of the cut. The configuration of the dredged channel within the MSMU will create eight or more islands, totalling about 9 acres. These channels will enable fish to leave the MSMU through a water control structure into Dead Slough and then into the main channel. The new mouth of Dead Slough will empty into Scisco Chute. The intermittent stream now depositing sediment in Refuge backwaters will be redirected to Scisco Chute, decreasing the sedimentation rate in the Refuge and Dead Slough. The new channel will be 2,430 feet long and 3 feet deep with a 30-foot bottom width.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1988
- Accession Number
- ADA203206
Entities
Organizations
- Rock Island District, U.S. Army Corps of Engineers