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The Federal Energy Regulatory Commission, which regulates about 1,800 power-producing dams, categorizes dam inundation maps as critical infrastructure information that “could be useful to a ...
Chester Morse Lake (originally Cedar Lake) is a lake in the upper region of the Cedar River watershed in the U.S. state of Washington.The original lake surface was 1,530 feet (466 m) above sea level, but when the river was dammed in 1900, the elevation was raised to 1,560 feet (475 m).
The Army Corps of Engineers, which also had shielded certain information about its dams, began posting dam inundation maps online in late 2021 after determining that releasing the information ...
The Federal Energy Regulatory Commission, which regulates about 1,800 power-producing dams, categorizes dam inundation maps as critical infrastructure information that “could be useful to a person planning an attack” and requires those receiving such information to sign non-disclosure agreements.
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).
Map of Pleistocene lakes in the Western US, showing the path of the Bonneville Flood along the Snake River. The Bonneville flood was a catastrophic flooding event in the last ice age, which involved massive amounts of water inundating parts of southern Idaho and eastern Washington along the course of the Snake River.
The Bureau of Reclamation said in response to questions from the AP that it is revising its policies and will start sharing more information about dam-failure inundation zones in 2025, though it said the process could take more than eight years to complete for all its dams.
A flood insurance rate map (FIRM) is an official map of a community within the United States that displays the floodplains, more explicitly special hazard areas and risk premium zones, as delineated by the Federal Emergency Management Agency (FEMA). [1]