In May, an aerial “dusting bombing” operation was used just north of Valdez to accelerate snow melting along the right of way into Keystone Canyon and Thompson Pass., 1976-07, PCA0002-2a-54, Folder: PCA0002-2a. 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/17473 Accessed May 23, 2025.