National Geographic : 1943 Feb
U. S.Army Engineers At Foot of a New Log Road, Six Pontoons Lashed Together and Powered with Outboard MotorsFerry Troops across aCanadian River Army's spelling for these boats is "ponton," after the French. Logs bracing the strip will retain dirt and gravel to beadded. Tractors cannot use such bare corduroy roads, as they soon grind them to pieces. Bridge builders will go to work here. They spanned 200 streams on the Alcan Highway.