State-discharge relations at dams on the Illinois and Des Plaines rivers in Illinois

Open-File Report 81-1009


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Stage-discharge relations were developed for the Brandon Road Dam on the Des Plainse River and the Dresden Island, Marseilles, Starved Rock, Peoria, and La Grange Dams on the Illinois River. At Brandon Road Dam, streamflow is regulated by the operation of tainter gates and headgates. Tainter gates are operated to regulate streamflow at the Dresden Island, Marseilles, and Starved Rock Dams. Peoria Dam and La Grange Dam comprise timber Chanoine wickets which are lowered to a horizontal position on the streambed when used for streamflow regulation. Both dams have concrete abutments housing butterfly valves that are also used for regulation. A total of 50 discharge measurements ranging from 49.0 to 2,450 cubic meter per second were used to determine discharge coefficients in equations expressing discharge as a function of headwater depth, tailwater depth, and gate opening. A stage-discharge relation for Chanoine wicket dams developed from a U.S. Army Corps of Engineers hydraulic model study in 1937 and 1938 was verified with discharge measurements made downstream from the Peoria and La Grange Dams. (USGS)
Publication type Report
Publication Subtype USGS Numbered Series
Title State-discharge relations at dams on the Illinois and Des Plaines rivers in Illinois
Series title Open-File Report
Series number 81-1009
DOI 10.3133/ofr811009
Edition -
Year Published 1981
Language ENGLISH
Publisher U.S. Geological Survey,
Description vii, 62 p. ill., map ;28 cm.
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