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Title: Navigation conditions at LaGrange Lock and Dam, Illinois Waterway: hydraulic model investigation
Authors: Wooley, Ronald T.
Keywords: Fixed-bed models
Hydraulic models
Illinois Waterway
LaGrange Lock and Dam
Locks (Waterways)
Navigation Conditions
Issue Date: Aug-1997
Publisher: Coastal and Hydraulics Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Technical report (U.S. Army Engineer Waterways Experiment Station) ; CHL-97-16.
Description: Technical report
LaGrange Lock and Dam are located on the Illinois River at river mile 80.2, 8 miles downstream from the city of Beardstown, IL. The structures include a 110-ft wide by 600-ft-long navigation lock with a nominal lift (maximum) of 10 ft; a 540-ft-wide navigable pass with 135 wickets at 4.0 ft center to center; a 136-ft-wide regulating weir; and a 390-ft-long earth dam with top elevation of 430.0. (elevations (el) are in feet referred to the National Geodetic Vertical Datum). LaGrange Lock and Dam maintained a 78-mile-long navigation pool at el 429.0 that extends upstream to the Peoria Lock and Dam near Peoria, IL. A fixed-bed model reproduced about 2.1 miles of the Illinois Waterway and adjacent overbank to an undistorted scale 1:100. The model investigation was concerned with alleviating some problems of the wicket dam by replacing some of the wickets adjacent to the lock with a submersible tainter gate. The tainter gate would regulate the navigation pool under normal conditions and could be submerged to pass heavy ice flows. The tainter gate eliminates the need for using the wickets for pool regulation, therefore greatly reducing the raising and lowering of the wickets. The model investigation was necessary for evaluation of the effects of the proposed tainter gate on navigation conditions, water-surface slopes through the reach, and the potential for scouring of the channel downstream of the proposed tainter gate.
Appears in Collections:Technical Report

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