25,000 Volts Under the Sea: Laying of the San Juan Cable (1952)

This BPA film tells the story of the world's longest single-length submarine high-voltage cable, which delivered electric power from the Columbia River to the San Juan Islands in Washington state in 1951. The project, designed and carried out by BPA, involved laying four and a half miles of 25,000-volt electric transmission cable (conductor) across Rosario Strait from Anacortes to Decatur Island. Other facets included installing a wood pole line on the island, followed by another two-mile submarine power cable to Lopez Island. The project cost $600,000 and was considered a major technological achievement at the time. This BPA film, also known as "The Laying of the San Juan Cable," shows the planning, engineering, transportation and installation of the submarine cable. The cable, which was four and two-thirds inches in diameter and weighed 19 pounds per foot for a total of nearly three-quarter of a million pounds, was wound for shipping in one continuous 7.5-mile length. The film also includes an animated model that demonstrates how the cable was carried inside the ship. The project began April 17, 1951, and Orcas Power and Light Cooperative began receiving power from BPA on July 22, 1951.
Cable failures in the 1960s led to a second cable installation in 1966 and a third in 1972.
Learn about other BPA films at: www.bpa.gov/goto/Films.

[@danielmorse6597]

I saw this as a kid. I had this amazing teacher that used to show us these films. God only knows where she got it, but she did. Cool.

[@antoleyo3857]

An era where people do the work with their muscle and their heart. Beautiful era.

[@ericr2zz]

Beautiful era??? People dying from lung cancer due to Asbestos (see the guy wrapping asbestos with his hands at 4:34 with no protection) . Lead poisoning isn't so beautiful- guy wrapping the wire with Lead at 2:58). And you didn't get any compensation for calling in sick. Workers die because safety regulations were ignored or didn't exist.. Child labor bans didn't exist until 1938 but were routinely flouted. I wouldn't call this a beautiful era.

[@borntoclimb7116]

interessante dokumentation aus den 1950er jahren,in deutschland lässt sich die gechichte der hochspannungstechnik auch sehr weit zurückverfolgen.