Chopping permanent ice uncovered in August on the Alaska Highway. Melting of such ice when the insulating cover is removed is one of the problems solved., PCA0042-169, Box: PCA0042. Fred B. Dodge Photograph Collection, 1943, PCA 42. Alaska State Library - Historical Collections Finding Aids. https://alaska.libraryhost.com/repositories/2/archival_objects/24348 Accessed October 31, 2025.