Ah Pah Dam was a proposed dam on the

Klamath River The Klamath River (Karuk: ''Ishkêesh'', Klamath: ''Koke'', Yurok: ''Hehlkeek 'We-Roy'') flows through Oregon and northern California in the United States, emptying into the Pacific Ocean. By average discharge, the Klamath is the second large ...

in the

U.S. state In the United States, a state is a constituent political entity, of which there are 50. Bound together in a political union, each state holds governmental jurisdiction over a separate and defined geographic territory where it shares its sove ...

California California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the m ...

proposed by the

United States Bureau of Reclamation The Bureau of Reclamation, and formerly the United States Reclamation Service, is a federal agency under the U.S. Department of the Interior, which oversees water resource management, specifically as it applies to the oversight and opera ...

as part of its United Western Investigation study in 1951. It was to have been high and was to be located upstream of the river's mouth. It would be taller than any dam in the United States and it would stand almost as tall as the

Transamerica Pyramid The Transamerica Pyramid is a 48-story futurist skyscraper in San Francisco, California, United States, and the second tallest building in the San Francisco skyline. Located at 600 Montgomery Street between Clay and Washington Streets in the c ...

building in San Francisco, but would be much more massive. It would flood of the Trinity River, including the Yurok, Karuk and Hupa Indian Reservations, the lower Salmon River, and of the Klamath River, creating a reservoir with a volume of – three fifths the size of

Lake Mead Lake Mead is a reservoir formed by the Hoover Dam on the Colorado River in the Southwestern United States. It is located in the states of Nevada and Arizona, east of Las Vegas. It is the largest reservoir in the US in terms of water capacity. L ...

, and over three times the size of the current largest reservoir in California,

Shasta Lake Shasta Lake, also popularly known as Lake Shasta, is a reservoir in Shasta County, California, United States. It began to store water in 1944 due to the impounding of the Sacramento River by Shasta Dam, the ninth tallest dam in the United State ...

. The water would flow by gravity through a tunnel long to the

Sacramento River The Sacramento River ( es, Río Sacramento) is the principal river of Northern California in the United States and is the largest river in California. Rising in the Klamath Mountains, the river flows south for before reaching the Sacramento� ...

just above Redding and onward to Southern California, in an extreme diversion plan known as the Klamath Diversion. The tunnel would have been located near the southernmost extent of the reservoir. It was named in the language of the

Yurok The Yurok (Karuk language: Yurúkvaarar / Yuru Kyara - "downriver Indian; i.e. Yurok Indian") are an Indigenous people from along the Klamath River and Pacific coast, whose homelands are located in present-day California stretching from Trinidad ...

people.

References

* ''

Cadillac Desert ''Cadillac Desert'' (1986), is a history by American Marc Reisner about land development and water policy in the western United States. Subtitled ''The American West and Its Disappearing Water'', it explores the history of the federal agencies, ...

'', Marc Reisner, revised edition, Penguin US, (1993),

External links

''Interim Report on Reconnaissance: California Division'', United Western Investigation, Bureau of Reclamation''The Water Center's Watershed Review'', University of Washington
{{coord, 41.422038, N, 123.935909, W, display=title Dams in California History of Humboldt County, California United States Bureau of Reclamation proposed dams