View of construction vehicles at the Green Mountain Dam site in Summit County, Colorado. Shows a man, a tractor and a steam-shovel with a bucket. The steam-shovel is labeled: "Bucyrus Erie."
Green Mountain Dam (Colo.)--1930-1950.; Summit County (Colo.)--1930-1950.; Dam construction--Colorado--Summit County--1930-1950.; Steam shovels--Colorado--Summit County--1930-1950.
Rooftop view of a construction site on Champa Street near 17th (Seventeenth) Street in downtown Denver, Colorado. Men stand nearby and watch a steam-shovel at work. A sign on a nearby building reads: "Denver Chamber of Commerce."