The tower carried 115 kV and was built in 1919 according to https://www.chicoer.com/2018/12/07/it-was-originally-built-in-1919-what-failed-on-pge-tower-at-heart

The tower carried 115 kV and was built in 1919 according to https://www.chicoer.com/2018/12/07/it-was-originally-built-in-1919-what-failed-on-pge-tower-at-heart-of-camp-fire-probe/ https://www.chicoer.com/2018/12/07/it-was-originally-built-i... San Francisco Gas and Electric Company and the California Gas and Electric Corporation merged to form PG&E in 1905. This technology dates from the almost the earliest days: both Nikola Tesla (d 1943) and Thomas Edison (d 1931) were still alive when this tower was built, and George Westinghouse died only in 1914.