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D. M. and C. P. Dull succeeded in receiving the contract for Lock 5 at Brownstown (later Marmet) on August 20, 1875. Charles McGafferty and Company were t he fir s t k a nawha l ock s an d dams 49 low bidders on the Cabin Creek Shoal site, No. 4, and were awarded a contract on October 15, 1875. 21 It should be noted that at each of the lock and dam sites, contracts for the construction of the lock were let first. This would allow the lock to be used for navigation at suitable stages of the river while the dam and overflow weir were under construction.
6 Flashing of staunches was an annual ritual on the Yonne River in France, which arose in the Massif Central and reached its confluence with the Seine at Montereau. For more than four hundred years, logs were rolled into the river at various points, filling the river from bank to bank. When the flow in the river was adequate, the staunches were opened sequentially and the great flotage surged down the Yonne from Clamency to the Seine and thence to Paris. Bear-trap gate, Davis Island. Wegmann, The Design and Construction of Dams, 192.
Because their proclivity to collect debris caused them to malfunction, they were not utilized elsewhere. Searching for a more suitable movable dam, engineer officers of the Corps of Engineers ex- Desfontaines drum dam. Thomas and Watt, The Improvement of Rivers, 647. 38 ch a noine wic k e t da ms an d lock s perimented with a design used by the British Royal Engineers on the Betwa Dam in India. This device was itself a modification of the Thénard shutter without the counter leaf. These self-acting wickets were installed on Dams 1 and 5 on the Monongahela River as an experiment.