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Timber crib dams were erected of heavy timbers or dressed logs in the manner of a log house and the interior filled with earth or rubble. The heavy crib structure supported the dam's face and the weight of the water. Splash dams were timber crib dams used to help float logs downstream in the late 19th and early 20th centuries.
Hoover Dam is a concrete arch-gravity dam in the Black Canyon of the Colorado River, on the border between the U.S. states of Nevada and Arizona. Constructed between 1931 and 1936, during the Great Depression, it was dedicated on September 30, 1935, by President Franklin D. Roosevelt. Its construction was the result of a massive effort ...
Cornalvo Dam in Spain, erected in the 1st–2nd century AD Lake Homs Dam in Syria, erected in 284 AD (photographed 1921). This is a list of Roman dams and reservoirs.The study of Roman dam-building has received little scholarly attention in comparison to their other civil engineering activities, [1] even though their contributions in this field have been ranked alongside their expertise in ...
Dental dam. Dental dam. A dental dam or rubber dam is a thin, 6-inch (150 mm) square sheet, usually latex or nitrile, used in dentistry to isolate the operative site (one or more teeth) from the rest of the mouth. Sometimes termed "Kofferdam" (from German), it was designed in the United States in 1864 by Sanford Christie Barnum [de]. [1]
The nearly 8100 major dams in the United States in 2006. The National Inventory of Dams defines a major dam as being 50 feet (15 m) tall with a storage capacity of at least 5,000 acre-feet (6,200,000 m 3), or of any height with a storage capacity of 25,000 acre-feet (31,000,000 m 3).
An aqueduct is a watercourse constructed to carry water from a source to a distribution point far away. In modern engineering, the term aqueduct is used for any system of pipes, ditches, canals, tunnels, and other structures used for this purpose. [1] The term aqueduct also often refers specifically to a bridge carrying an artificial ...
The removal of the four dams, which were built without tribes’ consent between 1912 and the 1960s, has cleared the way for California to return more than 2,800 acres of ancestral land to the ...
Water wheels were used to power sawmills, grist mills and for other purposes during development of the United States. The 40 feet (12 m) diameter water wheel at McCoy, Colorado, built in 1922, is a surviving one out of many which lifted water for irrigation out of the Colorado River. Two early improvements were suspension wheels and rim gearing ...