The O’Shaughnessy Dam and Reservoir

This paper describes the design and construction of a dam and reservoir built to increase the storage of raw water for the water supply of the City of Columbus, Ohio. The masonry portion of the dam is of the overflow gravity type, the spillway section, 879 ft. in length between end abutments, being spanned by a 12-arch reinforced concrete bridge. The crest of the spillway is 64 ft. above low water in the river and has a discharge capacity of 110 000 cu. ft. per sec. The reservoir, formed by the construction of the dam, is 8 miles in length, has a maximum width of 1 900 ft., and a total available storage capacity of 5 341 000 000 gal. The total cost of the dam and reservoir was $2 220 080.