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Title: Model study of Monongahela Dam #4 lock replacements, Monongahela River, Pittsburgh, Pennsylvania: hydraulic model investigation
Authors: Sanchez, Jose E.
Keywords: Hawser forces
Hydraulic models
In-Chamber Longitudinal Culvert Filling & Emptying System (ILCS)
Lock design
Lock replacement
Locks and Dam #4
Monongahela River
Publisher: Coastal and Hydraulics Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: ERDC/CHL TR ; 03-7.
Description: Technical report
Navigation improvements are being investigated for several existing projects on the Monongahela River. A hydraulic model study was conducted to evaluate filling and emptying system design alternatives and flow conditions in the upper and lower approaches for the lock replacements at Locks and Dam #4. A 1:25-scale model was constructed to determine the range of lock performance for both locks. The proposed filling and emptying system for the locks is an In-Chamber Longitudinal Culvert Filling and Emptying System. The filling time for acceptable chamber performance with the 6.035-m (19.8-ft) lift was 8.3 min. This filling time was achieved with a 3.0-min valve. The emptying time for the same lift was 8.75 min, and it was achieved with a valve time between 1.0 and 2.0 min. Experiments were also performed to measure the surge created in the vicinity of the proposed downstream lock approach during emptying operations. Results showed that the water-surface elevation in the lower approach increased by 0.37 ft and occurred approximately 1.5 to 3.0 min into the emptying cycle.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Technical Report

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