. Engineering and Contracting. as a member of the Connecticut StateBoard of Engineers, having supervision ofdams and reservoirs. As examples of the workof an older generation of engineers, thesedams are worthy of record, and we describethem here from a paper read at the recentannual convention of the Connecticut Society that Mr. Potter had some official connectionwith nine dams. The first dam was built in 1881 and 1882on the Shetucket River in Norwich at a pointwhere the drainage area is about squaremiles. The rollway is 400 ft. long by 12 The height of abutments has since beeni
. Engineering and Contracting. as a member of the Connecticut StateBoard of Engineers, having supervision ofdams and reservoirs. As examples of the workof an older generation of engineers, thesedams are worthy of record, and we describethem here from a paper read at the recentannual convention of the Connecticut Society that Mr. Potter had some official connectionwith nine dams. The first dam was built in 1881 and 1882on the Shetucket River in Norwich at a pointwhere the drainage area is about squaremiles. The rollway is 400 ft. long by 12 The height of abutments has since beenincreased 4 ft. The material for the founda-tion was loose gravel more than 60 ft. dam was built of rubble masonry laidin cement mortar coped with granite. Thespecifications did not call for full mortarjoints, as the writer remembers them, but sim-ply required that the stones be well beddedin mortar. There was a concrete facing onthe upstream side of the dam. and earth fillingas shown by the original plan. Fig. 1. This. £/7q Co/ff^. Fig. 1. of Civil Engineers, by Mr. C. E. Chandler ofNorwich, Conn.—Editors). Between 1860 and 1870, Mr. Potter de-signed and superintended the construction ofthree dams on the Shetucket River, two ofthem about 25 ft. high and one of them about15 ft. high, and the Ousatonic dam on theOusatonic River, about 24 ft. high. Thesedams are still among the very largest in thestate; the drainage area at the first three damsbeing 459, 477 and 526 square miles, respec-tively, and at the latter dam 1,560 square \11 these dams were built on a rather poorgravel foundation. Stream flow data in this country were scarce plan calls for the base of the dam to be 1 the bed of the stream, and to be 15 including 1 ft. of concrete facing and15 ft. high. The crest is of granite blocks7%- ft. wide across the dam, inclining up-stream on a slope of 5 to 1. The apron is 22 ft. wide and is a crib ofthree layers of r2-in. timbers at right angle
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