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The word dam can be traced back to Middle English, [1] and before that, from Middle Dutch, as seen in the names of many old cities, [2] such as Amsterdam and Rotterdam. Ancient dams were built in Mesopotamia and the Middle East for water control. The earliest known dam is the Jawa Dam in Jordan, dating to 3,000 BC. Egyptians also built dams ...
The next one downstream, Chief Joseph Dam, which was built decades later, also does not have fish passage. This means no salmon reach the Grand Coulee Dam or the Colville Indian Reservation . The third large dam downstream, Wells Dam , has an intricate system of fish ladders to accommodate yearly salmon spawning and migration.
"The Water Is Wide" may be considered a family of lyrics with a particular hymn-like tune. [1]"O Waly Waly" (Wail, Wail) may be sometimes a particular lyric, sometimes a family tree of lyrics, sometimes "Jamie Douglas", sometimes one melody or another with the correct meter, and sometimes versions of the modern compilation "The Water Is Wide" (usually with the addition of the verse starting "O ...
The Aswan Dam, or Aswan High Dam, is one of the world's largest embankment dams, which was built across the Nile in Aswan, Egypt, between 1960 and 1970. When it was completed, it was the tallest earthen dam in the world, surpassing the Chatuge Dam in the United States. [ 2 ]
The following table lists the largest man-made dams by volume of fill/structure. By general definition, a dam is a barrier that impounds water or underground streams, hence tailings dams are relegated to a separate list.
For dam construction, two cofferdams are usually built, one upstream and one downstream of the proposed dam, after an alternative diversion tunnel or channel has been provided for the river flow to bypass the foundation area of the dam. These cofferdams are typically a conventional embankment dam of both earth- and rock-fill, but concrete or ...
The four thought it was a perfect name for them because they were always on the road and all four had the image of being outlaws in country music. [ 4 ] In the Highwaymen's version of the song, each of the four verses was sung by a different performer: first Nelson as the highwayman, then Kristofferson as the sailor, then Jennings as the dam ...
A beaver dam or beaver impoundment is a dam built by beavers; it creates a pond which protects against predators such as coyotes, wolves and bears, and holds their food during winter. These structures modify the natural environment in such a way that the overall ecosystem builds upon the change, making beavers a keystone species and ecosystem ...