While all the 48-inch diameter pipeline is now in place, a number of tie-in welds remain to be completed before the pipeline is one continuous length. That will occur this spring when the final segment of pipe is hydrotested and the last tie-in weld is made., 1977-01, PCA0002-4a-22, Folder: PCA0002-4a. 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/17733 Accessed February 22, 2025.