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Hoover Dam, Lower Portal Access Road, U.S. Highway 93, Boulder City, Clark County, NV
Summary
Significance: It was an important feature in the construction of Hoover Dam. The road provided access to the bottom of Black Canyon at a point about one mile downstream from the dam construction site. Here a coffer dam was constructed and diversion tunnels were bored northward on the Nevada and Arizona sides of the river.
Survey number: HAER NV-27-S
Building/structure dates: 1931 Initial Construction
National Register of Historic Places NRIS Number: 81000382
Tags
Date
1969 - 1980
Contributors
Historic American Engineering Record, creator
Six Companies, Inc., Engineer & Builder
U.S. Bureau of Reclamation
Location
Source
Library of Congress
Copyright info
No known restrictions on images made by the U.S. Government; images copied from other sources may be restricted. http://www.loc.gov/rr/print/res/114_habs.html
