Salcha River: Where the pipeline crosses beneath rivers, it must be buried at depths great enough to ensure the scouring effects of the river do not reach the buried line. Here, a surveyor checks the depth of the ditch across the Salcha River., 1976-05, PCA0002-1b-16, Folder: PCA0002-1b. Alyeska Pipeline Service Company : Trans-Alaska Pipeline Construction Collection, 1976-1977, PCA 2. Alaska State Library - Historical Collections Finding Aids. https://alaska.libraryhost.com/repositories/2/archival_objects/17354 Accessed February 22, 2025.