Pieces of rebar extrude from the Eastwood Multiple Arch Dam. Retrofitting could begin next spring. Randy Pench [email protected] In the Gold Rush-era foothills community of Jackson, the worst-case ...

The concrete Eastwood Multiple Arch Dam in Jackson was built in 1916 and holds back large quantities of arsenic-contaminated tailings left over from gold mining.

This article was originally published with the title “The Multiple Arch Concrete Dam” in Scientific American Magazine Vol. 117 No. 10 (September 1917), p. 172 doi:10.1038 ...

The crew arrived July 7, 1914, and the dam was dedicated Nov. 24, 1914. The dam is a concrete multiple arch weir that has a hydraulic height of 23 feet and a crest length of 915 feet.

Buchanan Dam is the uppermost dam in the Highland Lakes. The dam is 145.5 feet high and stretches almost two miles long. It is one of the longest multiple arch dams in the world.

The dam was built in 1908 and is the world’s first concrete multiple-arch dam. It created Hume Lake, which originally was used as a water source for a logging operation.