An Accommodation Dam.

An Accommodation Dam.

At Horse Shoe, N. Y., a reinforced concrete accommodation-dam has been built, which forms a railway bridge, a storage reservoir and a fishway. Its location is in the Adirondack mountains near Tttpper lake, where a large acreage of timber-land is being developed. The numerous streams have been dammed and utilised for powerpurposes. The dam, as has been said, is of reinforced concrete, with a deck-slab of the same material, shaped as ordinary dam sections are shaped, with interior reinforced concrete buttresses supporting it at intervals. These buttresses are carried up through the deck-slab, and on these tops are stringers supporting the railway. The dam is 250 ft. long; its spillway is 70 ft. and is provided with a log sluice-way, penstock, waste-gates and a 4-direction fish-ladder of concrete pockets that serve as water-pools, with small openings on the bottom of each pocket, which insure a free flow and passageway for the fish. The deck-slab is 2 ft. inside at the base and 1 ft. at the top. It is supported on buttresses spaced every to ft., and varying in size according to their positions in the dam. At the top they are braced together by two 10 x 12-in. in section reinforced concrete beams, entirely free from which the rails and ties are carried on to x 12-in. stringers of wood clapped into notches on the top of the supporting buttresses.

At Horse Shoe, N. Y., a reinforced concrete accommodation-dam has been built, which forms a railway bridge, a storage reservoir and a fishway. Its location is in the Adirondack mountains near Tttpper lake, where a large acreage of timber-land is being developed. The numerous streams have been dammed and utilised for powerpurposes. The dam, as has been said, is of reinforced concrete, with a deck-slab of the same material, shaped as ordinary dam sections are shaped, with interior reinforced concrete buttresses supporting it at intervals. These buttresses are carried up through the deck-slab, and on these tops are stringers supporting the railway. The dam is 250 ft. long; its spillway is 70 ft. and is provided with a log sluice-way, penstock, waste-gates and a 4-direction fish-ladder of concrete pockets that serve as water-pools, with small openings on the bottom of each pocket, which insure a free flow and passageway for the fish. The deck-slab is 2 ft. inside at the base and 1 ft. at the top. It is supported on buttresses spaced every to ft., and varying in size according to their positions in the dam. At the top they are braced together by two 10 x 12-in. in section reinforced concrete beams, entirely free from which the rails and ties are carried on to x 12-in. stringers of wood clapped into notches on the top of the supporting buttresses.