U.S. Bureau of Reclamation sign at Hoover Dam

Photograph of the U.S. Bureau of Reclamation sign at Hoover Dam; Caption in album: "You are entering the Boulder Canyon Project Federal Reservation Property of the United States. You are subject to all the regulations of the Reservation, in part as follows: 1. The possession of, or transportation, within the reservation, of intoxicating liquors, narcotics, explosives or fire arms is prohibited. 2. Speed limits of motor vehicles 40 miles per hour on straight-aways, 15 miles per hour on blind and dangerous curves. 3. Dangerous or reckless driving is prohibited. Violators of any of the above regulations will be subject to prosecution and ejected from the reservation. Visitors enter the reservation upon their own risk. Visitors not allowed in the canyon. Those wishing to see the reservoir site and Hoover damsite, follow the government highway to the observation points." MEN ARE WORKING?PLEASE REFRAIN FROM ROLLING OR THROWING ROCKS> U.S. Bureau of Reclamation.