April 9, 1914: Kensico Dam Excavation

Kensico Dam 2012

April 9, 1914: Engineering News article. Excavation and Foundation Work for the Kensico Dam. By Wilson Fitch Smith. “SYNOPSIS-A masonry dam 307ft. high, 1843 ft. long, containing 900,000 cu.yd. of masonry will store 29 billion gallons of water near the lower end of the Catskill Aqueduct, New York City additional water supply. Expansion joints 80 ft. c. to c., drainage wells, inspection galleries, and an architectural treatment of the downstream face of the dam are among its special features. The contract price was nearly $8,000,000. Steam shovels were used for excavating work and cableways for handling the excavated material and much of the contractor’s plant. Guy and stiff-leg derricks were used to complete the excavation and to place masonry. The contractor’s plant represents an investment of more than $1,000,000 and is operated largely by electrical current. During seven months of 1913, a total of 316,000 cu.yd. and in September, 58,242 cu.yd. of concrete and concrete blocks were placed in the dam. Progress on construction to date indicates that the dam will be completed long in advance of the contract date, which was about 1920.

The Kensico Dam, now under construction by New York City, for a storage reservoir in the valley of the Bronx River, three miles north of White Plains, is an important feature of the Catskill water-supply system. It takes rank among the notable masonry dams of the world not only on account of being one of the largest, but also because of the methods of construction which enabled over 300,000 cu.yd. of masonry to be placed in the dam during the working season of 1913.”

Reference: Smith, Wilson F. 1914. “Excavation and Foundation Work for the Kensico Dam.” Engineering News. 71:15(April 9, 1914): 763.

Commentary: This dam is one of the most beautiful masonry dams ever built.

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