To test both structural and aesthetic concerns for their new structures in the early 20th Century , the Board of Water Supply used scale models.
From NYC Water
Overflow in Harriman dam, Vermont, built in the early 1920s.
The overflow at the Benagéber Dam, near Valencia, Spain.
The old village of Benagéber was flooded for the construction of the dam in the 1950’s and the villagers were forced to move to a new Benagéber settlement built further up the valley, or to move to the outskirts of Valencia.
Dovestones reservoir overflow, in Greater Manchester area, England
Overflow in the Pontsticill or Taf Fechan Reservoir in south Wales, built in 1927.
Picture by Greg Marshall
Labyrinth spillway at Ute Dam, New Mexico.
Labyrinth spillways increase spillway capacity by increasing unit discharge over conventional weirs for a given head.
Kechut reservoir overflow, Armenia
The 300ft spillway at Llyn Brianne reservoir, Wales, is a notable tourist attraction when the reservoir is spilling.
The slipway had been used illegally by kayakers for about 20 years.
The Lower Nihotupu Dam, New Zealand, was built between 1945 and 1948.
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Brian Hollis rappels into Gibson Dam glory hole spillway, Montana. Photo by Joe Rohde.
From the Bureau of Reclamation, Great Plains Region