. The street railway review . e length of the spillway between abut-ments is 707 ft., and to this has been added an additional spillway143 ft. long, which was formed by removing the rock and earthfrom the river bank back for 150 ft. from the eastern abutment toan elevation i ft. lower than that of the crest of the main crest on the additional spillway, however, is i ft. higher thanthat of the main dam. In the western abutment are 12 arched waste gales, each 4 and 6 ft. high, opened and closed by heavy iron hoists operatedby rack and pinion to which is connected a 3-h. p. Genera
. The street railway review . e length of the spillway between abut-ments is 707 ft., and to this has been added an additional spillway143 ft. long, which was formed by removing the rock and earthfrom the river bank back for 150 ft. from the eastern abutment toan elevation i ft. lower than that of the crest of the main crest on the additional spillway, however, is i ft. higher thanthat of the main dam. In the western abutment are 12 arched waste gales, each 4 and 6 ft. high, opened and closed by heavy iron hoists operatedby rack and pinion to which is connected a 3-h. p. General Electricmotor. The eastern dam is practically a solid rock wall, consideredcapable of resisting floods. The power house lies between the west bank and the short con-crete dam and is practically a continuation of the dam. It is ofconcrete, with the exception of the upper walls which are of foundations are carried down to bedrock, and the house is car-ried on heavy box web girders resting upon steel I-Iieam .\H(1VK WORK-OCT. 2!, 1!)I12. way Review and other technical papers,resume of the chief features: The following is a brief MECHANICSVILLE STATION. .Mechanicsville is a village of about inhabitants, situated onthe Hudson River, 13 miles north of Troy. Two miles below thisvillage in the town of Half-Moon, and 11 miles from Troy, on theHudson River, is located the power plant of the Hudson RiverPower Transmission Co. The point chosen for its development is divided by an island intotwo channeh with a combined width of about 1,200 fl. The westernchannel is used for the head-nnd tail-race. The power house starlsfrom and extends into the river 215 fl. and is connected with theisland \>y a concrete dam 26 ft. abf)ve .he bed of the river, 10 on top and 18 ft. wide at the Ikisc. The up-stream face isvertical, the down-stream face sloping. The dam is provided withfour arched waste gales 4 ft. wide, 6 ft. 9 in. thick,
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