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description

Summary

Significance: They were an important feature in the construction of Hoover Dam. The tailings resulted from excavation of tunnels for diversion of the Colorado River, for penstock and spillway facilities, for lower-level access to the Hoover Dam power plant, and for other dam-related facilities.

Survey number: HAER NV-27-W

Building/structure dates: after. 1930- before. 1937 Initial Construction

National Register of Historic Places NRIS Number: 81000382

label_outline

Tags

dams boulder city hoover dam hoover dam nevada tailings waste tailings portal tunnel access portal tunnel access road boulder clark county historic american engineering record inc six companies us bureau of reclamation photo ultra high resolution high resolution power plants library of congress national register of historic places colorado river
date_range

Date

1969 - 1980
person

Contributors

Historic American Engineering Record, creator
Six Companies, Inc., Builder
U.S. Bureau of Reclamation
place

Location

boulder city ,  35.97822, -114.83451
create

Source

Library of Congress
link

Link

http://www.loc.gov/
copyright

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

label_outline Explore Portal Tunnel Access Road, Inc Six Companies, Tailings

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Topics

dams boulder city hoover dam hoover dam nevada tailings waste tailings portal tunnel access portal tunnel access road boulder clark county historic american engineering record inc six companies us bureau of reclamation photo ultra high resolution high resolution power plants library of congress national register of historic places colorado river