Control-Structure Ratings on the Fox River at McHenry and Algonquin, Illinois
Scientific Investigations Report
2009-5186
Prepared in cooperation with the Illinois Department of Natural Resources?Office of Water Resources
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Abstract
The Illinois Department of Natural Resources-Office of Water Resources operates control structures on a reach of the Fox River in northeastern Illinois between McHenry and Algonquin. The structures maintain water levels in the river for flood-control and recreational purposes. This report documents flow ratings for hinged-crest gates, a broad-crested weir, sluice gates, and an ogee spillway on the control structures at McHenry and Algonquin. The ratings were determined by measuring headwater and tailwater stage along with streamflow at a wide range of flows at different gate openings. Standard control-structure rating techniques were used to rate each control structure.
The control structures at McHenry consist of a 221-feet(ft)-long broad-crested weir, a 4-ft-wide fish ladder, a 50-ft-wide hinged-crest gate, five 13.75-ft-wide sluice gates, and a navigational lock. Sixty measurements were used to rate the McHenry structures. The control structures at Algonquin consist of a 242-ft-long ogee spillway and a 50-ft-wide hinged-crest gate. Forty-one measurements were used to rate the Algonquin control structures.
Suggested Citation
Straub, T., Johnson, G.P., Hortness, J., Parker, J.R., 2009, Control-Structure Ratings on the Fox River at McHenry and Algonquin, Illinois: U.S. Geological Survey Scientific Investigations Report 2009-5186, vii, 61 p. , https://doi.org/10.3133/sir20095186.
ISSN: 2328-0328 (online)
ISSN: 2328-031X (print)
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Control-Structure Ratings on the Fox River at McHenry and Algonquin, Illinois |
| Series title | Scientific Investigations Report |
| Series number | 2009-5186 |
| DOI | 10.3133/sir20095186 |
| Year Published | 2009 |
| Language | ENGLISH |
| Publisher | U.S. Geological Survey |
| Contributing office(s) | Illinois Water Science Center |
| Description | vii, 61 p. |
| Projection | Albers Equal-Area Conic Projection |
| Scale | 1 |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |