Techniques for Computing Discharge at Four Navigation Dams on the Illinois and Des Plaines Rivers in Illinois

摘要

The purpose of the report is to describe discharge ratings for gates, tailwater stage, and lock valves at the Brandon Road, Dresden Island, Marseilles, and Starved Rock Locks and Dams on the Illinois Waterway. Data published by Mades (1981), unpublished information collected in 1981 and 1982, and data collected during the present study from 1983 through 1986 are presented in the report. The gate ratings presented in the report supersede some ratings published in 1981. The tailwater-stage ratings and valve ratings are presented for the first time. No additional work was performed at Peoria and La Grange Dams; therefore, the previously published ratings for these dams have not been changed. The ratings presented in the report are valid for the hydraulic conditions measured during the period of study.