Capacity of the overhead cranes.  Some of what they lifted was over 300 tons, so the two bridges...

Capacity of the overhead cranes. Some of what they lifted was over 300 tons, so the two bridges were used in unison.

Location
Hoover Dam
Photographer
Margaret Hovell
Date taken

Comments

  • Those are some serious cranes. For comparison, the two in the lab are 25 ton and 10 ton.

    — Catherine Hovell