Boulder Bridge, Rock Creek Park, NW, Washington, D.C.
Title, date, subject note, and keywords provided by the photographer. Credit line: The George F. Landegger Collection of District of Columbia Photographs in Carol M. Highsmith's America, Library of Congress, Pr... More
![[Boulder Beach in Stonington, Connecticut]](https://cache.getarchive.net/Prod/thumb/cdn4/L3Bob3RvLzIwMTkvMDkvMjIvYm91bGRlci1iZWFjaC1pbi1zdG9uaW5ndG9uLWNvbm5lY3RpY3V0LWE4ZTA1NC0xMDI0LmpwZw%3D%3D/40/26/webp "[Boulder Beach in Stonington, Connecticut]")
[Boulder Beach in Stonington, Connecticut]
Date provided by the photographer. Title from related images in same group. Credit line: The George F. Landegger Collection of Connecticut Photographs in the Carol M. Highsmith's America, Library of Congress, P... More
Lakeshore Road, Boulder Basin, Boulder City, Clark County, NV
Significance: Lakeshore Road and associated road features have been determined locally significant under National Register Criteria A and C. Construction of the road opened Lake Mead NRA, an early and major so... More
Lakeshore Road, Boulder Basin, Boulder City, Clark County, NV
Significance: Lakeshore Road and associated road features have been determined locally significant under National Register Criteria A and C. Construction of the road opened Lake Mead NRA, an early and major so... More
Lakeshore Road, Boulder Basin, Boulder City, Clark County, NV
Significance: Lakeshore Road and associated road features have been determined locally significant under National Register Criteria A and C. Construction of the road opened Lake Mead NRA, an early and major so... More
Hoover Dam, Lower Portal Access Road, U.S. Highway 93, Boulder City, C...
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 co... More
Bluebird Dam, On Ouzel Creek 7 miles west of Allenspark, Allenspark, B...
Significance: Completed ca. 1923, it is locally significant to Boulder County as an intact example of an early 20th century, and relatively uncommon, arch concrete dam. The dam documents an important engineerin... More
Bluebird Dam, On Ouzel Creek 7 miles west of Allenspark, Allenspark, B...
Significance: Completed ca. 1923, it is locally significant to Boulder County as an intact example of an early 20th century, and relatively uncommon, arch concrete dam. The dam documents an important engineerin... More
Bluebird Dam, On Ouzel Creek 7 miles west of Allenspark, Allenspark, B...
Significance: Completed ca. 1923, it is locally significant to Boulder County as an intact example of an early 20th century, and relatively uncommon, arch concrete dam. The dam documents an important engineerin... More
Hoover Dam, Spanning Colorado River at Route 93, Boulder City, Clark C...
Significance: It is a National Historic Landmark, an American Civil Engineering Landmark, and the focus of an historic district listed on the National Register of Historic Places. The dam was constructed betwee... More
Hoover Dam, Spanning Colorado River at Route 93, Boulder City, Clark C...
Significance: It is a National Historic Landmark, an American Civil Engineering Landmark, and the focus of an historic district listed on the National Register of Historic Places. The dam was constructed betwee... More
Hoover Dam, Arizona-Nevada Switchyard, U.S. Highway 93, Boulder City, ...
Significance: It is one of six switchyards built between 1935 and 1952 to provide terminals for major transmission lines carrying electricity to markets in California, Nevada, and Arizona. All of these faciliti... More
Hoover Dam, Los Angeles Relay Control Building, U.S. Highway 93, Bould...
Significance: It was a critical element of the Hoover Dam electrical generation and transmission system. Although it was associated by name with the Los Angeles Bureau of Power and Light 387.5/275 switchyard, t... More
Hoover Dam, U.S. Highway 93 Nevada Segment, U.S. Highway 93, Boulder C...
Significance: This segment of U.S. Highway 93 was constructed by Six Companies, Inc., as a finishing element to Hoover Dam. The segment includes stone parapet walls built in 1932 that display extruded-mortar st... More
Hoover Dam, U.S. Highway 93 Nevada Segment, U.S. Highway 93, Boulder C...
Significance: This segment of U.S. Highway 93 was constructed by Six Companies, Inc., as a finishing element to Hoover Dam. The segment includes stone parapet walls built in 1932 that display extruded-mortar st... More
Hoover Dam, Southern California Edison 138-KV Switchyard, U.S. Highway...
Significance: It was the second of six major Federal switchyards built at Hoover Dam. The switchyard was built to replace the Southern Sierras Power Company substation that had provided electricity for construc... More
Hoover Dam, Southern California Edison 138-KV Switchyard, U.S. Highway...
Significance: It was the second of six major Federal switchyards built at Hoover Dam. The switchyard was built to replace the Southern Sierras Power Company substation that had provided electricity for construc... More
Boulder Farm, Dunbarton Road, Hopkinton, Merrimack County, NH
Survey number: HABS NH-42 Building/structure dates: 1816 Initial Construction
Hoover Dam, Cable Hoist House, U.S. Highway 93, Boulder City, Clark Co...
Significance: It provided access to control cable tunnels from the power plant to the switchyard relay house, and a transformer in the lower level of the hoist house provided operating electricity to the switch... More
Hoover Dam, Cable Hoist House, U.S. Highway 93, Boulder City, Clark Co...
Significance: It provided access to control cable tunnels from the power plant to the switchyard relay house, and a transformer in the lower level of the hoist house provided operating electricity to the switch... More
Hoover Dam, Los Angeles Bureau of Power & Light Lines 1-3, U.S. Highwa...
Significance: The transmission lines included pioneering technology in high-voltage transmission. The lines were crucial elements of the Hoover Dam electrical complex, particularly in the role played by Hoover ... More
Hoover Dam, Metropolitan Water District Switchyard, U.S. Highway 93, B...
Significance: It was the second-largest Federal switchyard at Hoover Dam, the switchyard provided needed power for expansion of irrigation and municipal water supplies in California during and after WWII, but i... More
Hoover Dam, Metropolitan Water District Switchyard, U.S. Highway 93, B...
Significance: It was the second-largest Federal switchyard at Hoover Dam, the switchyard provided needed power for expansion of irrigation and municipal water supplies in California during and after WWII, but i... More
Hoover Dam, Metropolitan Water District Switchyard, U.S. Highway 93, B...
Significance: It was the second-largest Federal switchyard at Hoover Dam, the switchyard provided needed power for expansion of irrigation and municipal water supplies in California during and after WWII, but i... More
Bureau of Mines Boulder City Experimental Station, Administration Offi...
Significance: Building 100, as part of the Date Street Complex, was part of the Bureau of Mines Electrometallurgical Research Facility located in Boulder City. As such, it is within the designated Boulder City... More
Hoover Dam, U.S. Highway 93 Arizona Segment, U.S. Highway 93, Boulder ...
Public domain photograph - historical image of Arizona, United States, free to use, no copyright restrictions image - Picryl description
Grand Canyon National Park Roads, Boulder Street Headwall No. 1, North...
Significance: This headwall is representative of rustic style road structures constructed by the Civilian Conservation Corps and other depression-era public works agencies within the western national parks duri... More
Hoover Dam, Southern California Edison 230-KV Switchyard, U.S. Highway...
Significance: It was an integral element of the Hoover Dam electrical generation and transmission system. This switchyard provided much-needed electricity during WWII to power Douglas, Vultee, and Northrup airc... More
Hoover Dam, Los Angeles Switch Yard, U.S. Highway 93, Boulder City, Cl...
Significance: It was the first and largest of the six major Federal switchyards at Hoover Dam. When the first stage of the switchyard began operations in 1936, it provided electricity at the highest voltages ev... More
Hoover Dam, Metropolitan Water District Line 1, U.S. Highway 93, Bould...
Significance: The transmission line was a critical element of the Hoover Dam electrical generation and transmission system. The line provided Hoover Dam power for development of irrigation and municipal water d... More
Hoover Dam, Metropolitan Water District Line 1, U.S. Highway 93, Bould...
Significance: The transmission line was a critical element of the Hoover Dam electrical generation and transmission system. The line provided Hoover Dam power for development of irrigation and municipal water d... More
Bureau of Mines Metallurgical Research Laboratory, Original Building, ...
Significance: Building 200, as part of the Date Street Complex, was part of the Bureau of Mines Electrometallurgical Research Facility located in Boulder City. As such, it is within the designated Boulder City... More
Bureau of Mines Metallurgical Research Laboratory, Original Building, ...
Significance: Building 200, as part of the Date Street Complex, was part of the Bureau of Mines Electrometallurgical Research Facility located in Boulder City. As such, it is within the designated Boulder City... More
Bureau of Mines Metallurgical Research Laboratory, Original Building, ...
Significance: Building 200, as part of the Date Street Complex, was part of the Bureau of Mines Electrometallurgical Research Facility located in Boulder City. As such, it is within the designated Boulder City... More
![[Falls in North Boulder Canon] - stereoscopic view, public domain photorpaph](https://cache.getarchive.net/Prod/thumb/cdn4/L3Bob3RvLzIwMTkvMDkvMjcvZmFsbHMtaW4tbm9ydGgtYm91bGRlci1jYW5vbi02NmVmOTMtMTAyNC5qcGc%3D/40/23/webp "[Falls in North Boulder Canon] - stereoscopic view, public domain photorpaph")
[Falls in North Boulder Canon] - stereoscopic view, public domain phot...
Part of series: Beauties of the Rocky Mountains. The albumen silver print is a photographic printing process that was widely used in the 19th century. It involves coating paper support with a mixture of egg w... More
Hoover Dam, Circuits 1-15, U.S. Highway 93, Boulder City, Clark County...
Significance: Transformer Circuits are integral elements of the Hoover Dam electrical generation and transmission system. The circuits contributed to the importance of Hoover Dam power in the WWII and post-war ... More
Hoover Dam, Circuits 1-15, U.S. Highway 93, Boulder City, Clark County...
Significance: Transformer Circuits are integral elements of the Hoover Dam electrical generation and transmission system. The circuits contributed to the importance of Hoover Dam power in the WWII and post-war ... More
Hoover Dam, Circuits 1-15, U.S. Highway 93, Boulder City, Clark County...
Significance: Transformer Circuits are integral elements of the Hoover Dam electrical generation and transmission system. The circuits contributed to the importance of Hoover Dam power in the WWII and post-war ... More
Placer Mining in the Boulder range, Columbia, Tuolumne County
The Library holds only one photo from a pair published as a stereographic view. Gems of California scenery, no. 989. LOT subdivision subject: Placer Mining. This record contains unverified old data from caption card.
![[Boulder, Colorado], Colorado 19th century sterescope card.](https://cache.getarchive.net/Prod/thumb/cdn4/L3Bob3RvLzIwMTkvMTAvMDIvYm91bGRlci1jb2xvcmFkby0wOWRhMTctMTAyNC5qcGc%3D/40/25/webp "[Boulder, Colorado], Colorado 19th century sterescope card.")
[Boulder, Colorado], Colorado 19th century sterescope card.
Photograph showing group photo of Theodore Roosevelt and a man facing front on the deck of a ship. Another ship in the background. H100809 U.S. Copyright Office. Title from copyright registration. Number stamp... More
Royal Arch, Flat Iron Mts., near Boulder, Colo
No. 118745. Public domain photograph of monument, historic place, stereoscopic card, free to use, no copyright restrictions image - Picryl description
![Boulder [i.e., Hoover] Dam, Colo. [i.e., Arizona and Nevada]](https://cache.getarchive.net/Prod/thumb/cdn4/L3Bob3RvLzIwMTkvMDkvMTkvYm91bGRlci1pZS1ob292ZXItZGFtLWNvbG8taWUtYXJpem9uYS1hbmQtbmV2YWRhLWNkNTIzZS0xMDI0LmpwZw%3D%3D/40/49/webp "Boulder [i.e., Hoover] Dam, Colo. [i.e., Arizona and Nevada]")
Boulder [i.e., Hoover] Dam, Colo. [i.e., Arizona and Nevada]
Photograph shows power station towers and cables at the Hoover Dam, Arizona and Nevada. BC 5398. Photograph possibly from the United States Department of the Interior Bureau of Reclamation.
Bureau of Mines Boulder City Experimental Station, Date Street north o...
Public domain photograph - historical image of Nevada, United States, free to use, no copyright restrictions image - Picryl description
![Boulder Beach in [Stonington], Connecticut](https://cache.getarchive.net/Prod/thumb/cdn18/L3Bob3RvLzIwMTkvMTEvMjMvYm91bGRlci1iZWFjaC1pbi1zdG9uaW5ndG9uLWNvbm5lY3RpY3V0LWIxZGZlZi0xMDI0LmpwZw%3D%3D/40/26/webp "Boulder Beach in [Stonington], Connecticut")
Boulder Beach in [Stonington], Connecticut
City name based on location of Boulder Beach. Title, date, subject note, and keywords provided by the photographer. Credit line: The George F. Landegger Collection of Connecticut Photographs in the Carol M. Hig... More
View of the timberline from the old, one-way, dirt Fall River Road in ...
Title, date and keywords based on information provided by the photographer. The towering Front Range is the first mountain range encountered by white settlers years ago, and travelers today, moving west along t... More
Lakeshore Road, Boulder Basin, Boulder City, Clark County, NV
Significance: Lakeshore Road and associated road features have been determined locally significant under National Register Criteria A and C. Construction of the road opened Lake Mead NRA, an early and major so... More
Hoover Dam, Lower Portal Access Road, U.S. Highway 93, Boulder City, C...
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 co... More
Hoover Dam, Lower Portal Access Road, U.S. Highway 93, Boulder City, C...
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 co... More
New Fork River Bridge, County Road 136, Boulder, Sublette County, WY
Significance: The New Fork River Bridge is the only two span Kingpost Timber truss in the State. It is the most sophisticated of the few timber trusses still functional on the County Road System. As the best ... More
Bureau of Mines Boulder City Experimental Station, Annex, Date Street ...
Significance: Building 800, as part of the Date Street Complex, was part of the Bureau of Mines Electrometallurgical Research Facility located in Boulder City. As such, it is within the designated Boulder City... More
Bureau of Mines Boulder City Experimental Station, Annex, Date Street ...
Significance: Building 800, as part of the Date Street Complex, was part of the Bureau of Mines Electrometallurgical Research Facility located in Boulder City. As such, it is within the designated Boulder City... More
Hoover Dam, Spanning Colorado River at Route 93, Boulder City, Clark C...
Significance: It is a National Historic Landmark, an American Civil Engineering Landmark, and the focus of an historic district listed on the National Register of Historic Places. The dam was constructed betwee... More
Hoover Dam, Spanning Colorado River at Route 93, Boulder City, Clark C...
Significance: It is a National Historic Landmark, an American Civil Engineering Landmark, and the focus of an historic district listed on the National Register of Historic Places. The dam was constructed betwee... More
Hoover Dam, Spanning Colorado River at Route 93, Boulder City, Clark C...
Significance: It is a National Historic Landmark, an American Civil Engineering Landmark, and the focus of an historic district listed on the National Register of Historic Places. The dam was constructed betwee... More
Hoover Dam, Spanning Colorado River at Route 93, Boulder City, Clark C...
Significance: It is a National Historic Landmark, an American Civil Engineering Landmark, and the focus of an historic district listed on the National Register of Historic Places. The dam was constructed betwee... More
Hoover Dam, Spanning Colorado River at Route 93, Boulder City, Clark C...
Significance: It is a National Historic Landmark, an American Civil Engineering Landmark, and the focus of an historic district listed on the National Register of Historic Places. The dam was constructed betwee... More
Hoover Dam, Spanning Colorado River at Route 93, Boulder City, Clark C...
Significance: It is a National Historic Landmark, an American Civil Engineering Landmark, and the focus of an historic district listed on the National Register of Historic Places. The dam was constructed betwee... More
Hoover Dam, Spanning Colorado River at Route 93, Boulder City, Clark C...
Significance: It is a National Historic Landmark, an American Civil Engineering Landmark, and the focus of an historic district listed on the National Register of Historic Places. The dam was constructed betwee... More
Hoover Dam, Spanning Colorado River at Route 93, Boulder City, Clark C...
Significance: It is a National Historic Landmark, an American Civil Engineering Landmark, and the focus of an historic district listed on the National Register of Historic Places. The dam was constructed betwee... More
Hoover Dam, Henderson-Mead Transmission Line 2, Spanning Colorado Rive...
STORED OFF SITE AND ON SITE. mchr Significance: Previously known as a segment of the Davis-Hoover and the Hoover-Mead Transmission Lines, the documented segment of the Henderson-Mead Transmission Line 2 was con... More
Hoover Dam, Nevada Downstream Waste Tailings, Near the Lower Portal Tu...
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 lo... More
Hoover Dam, Nevada Downstream Waste Tailings, Near the Lower Portal Tu...
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 lo... More
Hoover Dam, Arizona-Nevada Switchyard, U.S. Highway 93, Boulder City, ...
Significance: It is one of six switchyards built between 1935 and 1952 to provide terminals for major transmission lines carrying electricity to markets in California, Nevada, and Arizona. All of these faciliti... More
Hoover Dam, Los Angeles Relay Control Building, U.S. Highway 93, Bould...
Significance: It was a critical element of the Hoover Dam electrical generation and transmission system. Although it was associated by name with the Los Angeles Bureau of Power and Light 387.5/275 switchyard, t... More
Howard Ditch, East Boulder Community Park, Boulder, Boulder County, CO
Public domain photograph - historical image of Colorado, United States, free to use, no copyright restrictions image - Picryl description
Hoover Dam, U.S. Highway 93 Nevada Segment, U.S. Highway 93, Boulder C...
Significance: This segment of U.S. Highway 93 was constructed by Six Companies, Inc., as a finishing element to Hoover Dam. The segment includes stone parapet walls built in 1932 that display extruded-mortar st... More
Boulder Farm, Dunbarton Road, Hopkinton, Merrimack County, NH
Survey number: HABS NH-42 Building/structure dates: 1816 Initial Construction
Hoover Dam, Los Angeles Bureau of Power & Light Lines 1-3, U.S. Highwa...
Significance: The transmission lines included pioneering technology in high-voltage transmission. The lines were crucial elements of the Hoover Dam electrical complex, particularly in the role played by Hoover ... More
Hoover Dam, Metropolitan Water District Switchyard, U.S. Highway 93, B...
Significance: It was the second-largest Federal switchyard at Hoover Dam, the switchyard provided needed power for expansion of irrigation and municipal water supplies in California during and after WWII, but i... More
Hoover Dam, Metropolitan Water District Switchyard, U.S. Highway 93, B...
Significance: It was the second-largest Federal switchyard at Hoover Dam, the switchyard provided needed power for expansion of irrigation and municipal water supplies in California during and after WWII, but i... More
Bureau of Mines Boulder City Experimental Station, Electrolytic Mangan...
Significance: Building 500, as part of the Date Street Complex, was a component of the Bureau of Mines Electrometallurgical Research Facility located in Boulder City. As such, it is within the designated Bould... More
Bureau of Mines Boulder City Experimental Station, Electrolytic Mangan...
Significance: Building 500, as part of the Date Street Complex, was a component of the Bureau of Mines Electrometallurgical Research Facility located in Boulder City. As such, it is within the designated Bould... More
Hoover Dam, Hoover-Basic Magnesium North & South Lines, U.S. Highway 9...
Significance: The transmission lines served a vital function during WWII by providing electricity generated at Hoover Dam to the Basic Magnesium plant to the south of Las Vegas. After the war, these transmissio... More
Hoover Dam, Southern California Edison 230-KV Switchyard, U.S. Highway...
Significance: It was an integral element of the Hoover Dam electrical generation and transmission system. This switchyard provided much-needed electricity during WWII to power Douglas, Vultee, and Northrup airc... More
Hoover Dam, Southern California Edison 230-KV Switchyard, U.S. Highway...
Significance: It was an integral element of the Hoover Dam electrical generation and transmission system. This switchyard provided much-needed electricity during WWII to power Douglas, Vultee, and Northrup airc... More
Hoover Dam, Southern California Edison 230-KV Switchyard, U.S. Highway...
Significance: It was an integral element of the Hoover Dam electrical generation and transmission system. This switchyard provided much-needed electricity during WWII to power Douglas, Vultee, and Northrup airc... More
Hoover Dam, U.S. Construction Railroad, U.S. Highway 93, Boulder City,...
Significance: The railroad was one of three railroads built and operated specifically to support construction of Hoover Dam and the power plant at the toe of the dam. Survey number: HAER NV-27-Q National Regi... More
Bureau of Mines Boulder City Experimental Station, Warehouse, Date Str...
Significance: Building 700, as part of the Date Street Complex, was part of the Bureau of Mines Electrometallurgical Research Facility located in Boulder City. As such, it is within the designated Boulder City... More
Bluebird Dam, Rock Cabin, On Ouzel Creek 7 miles west of Allenspark, A...
Survey number: HAER CO-33-A Public domain photograph - historical image of Colorado, United States, free to use, no copyright restrictions image - Picryl description
Hoover Dam, Metropolitan Water District Line 1, U.S. Highway 93, Bould...
Significance: The transmission line was a critical element of the Hoover Dam electrical generation and transmission system. The line provided Hoover Dam power for development of irrigation and municipal water d... More
Bureau of Mines Boulder City Experimental Station, Titanium Research B...
Significance: Building 400, as part of the Date Street Complex, was a component of the Bureau of Mines Electrometallurgical Research Facility located in Boulder City. As such, it is within the designated Bould... More
Bureau of Mines Metallurgical Research Laboratory, Original Building, ...
Significance: Building 200, as part of the Date Street Complex, was part of the Bureau of Mines Electrometallurgical Research Facility located in Boulder City. As such, it is within the designated Boulder City... More
Hoover Dam, Nevada Spoils Tunnel, Near the Lower Portal Tunnel Access ...
Significance: It was an important feature in the construction of Hoover Dam. The tunnel that was excavated to allow waste rock from Hoover Dam tunnels and other facilities to be deposited at the Nevada downstre... More
Hoover Dam, Circuits 1-15, U.S. Highway 93, Boulder City, Clark County...
Significance: Transformer Circuits are integral elements of the Hoover Dam electrical generation and transmission system. The circuits contributed to the importance of Hoover Dam power in the WWII and post-war ... More
Hoover Dam, Circuits 1-15, U.S. Highway 93, Boulder City, Clark County...
Significance: Transformer Circuits are integral elements of the Hoover Dam electrical generation and transmission system. The circuits contributed to the importance of Hoover Dam power in the WWII and post-war ... More
Hoover Dam, Circuits 1-15, U.S. Highway 93, Boulder City, Clark County...
Significance: Transformer Circuits are integral elements of the Hoover Dam electrical generation and transmission system. The circuits contributed to the importance of Hoover Dam power in the WWII and post-war ... More
Wilbur with Boulder Dam Com., 5/29/29
Public domain photograph of official photograph, building on the background, free to use, no copyright restrictions image - Picryl description
Las Vegas, Nevada. A mass of transmission towers and transformers redi...
Picryl description: Public domain image of a power dam, cascade, free to use, no copyright restrictions.
Las Vegas, Nevada. A mass of transmission towers and transformers redi...
Picryl description: Public domain image of a power dam, cascade, free to use, no copyright restrictions.
![Boulder Beach in [Stonington], Connecticut](https://cache.getarchive.net/Prod/thumb/cdn18/L3Bob3RvLzIwMTkvMTEvMjIvYm91bGRlci1iZWFjaC1pbi1zdG9uaW5ndG9uLWNvbm5lY3RpY3V0LWI5MDk3OC0xMDI0LmpwZw%3D%3D/40/26/webp "Boulder Beach in [Stonington], Connecticut")
Boulder Beach in [Stonington], Connecticut
City name based on location of Boulder Beach. Title, date, subject note, and keywords provided by the photographer. Credit line: The George F. Landegger Collection of Connecticut Photographs in the Carol M. Hig... More
Lakeshore Road, Boulder Basin, Boulder City, Clark County, NV
Significance: Lakeshore Road and associated road features have been determined locally significant under National Register Criteria A and C. Construction of the road opened Lake Mead NRA, an early and major so... More
Hoover Dam, Lower Portal Access Road, U.S. Highway 93, Boulder City, C...
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 co... More
Pine Hills Station, Barracks, West Side of Boulder Creek Road at Engin...
Significance: The Pine Hills Barracks was one of the earliest guard stations constructed by the Civilian Conservation Corps (CCC) as part of the Depression Era economic revitalization plan by United States Gove... More
Hoover Dam, Spanning Colorado River at Route 93, Boulder City, Clark C...
Significance: It is a National Historic Landmark, an American Civil Engineering Landmark, and the focus of an historic district listed on the National Register of Historic Places. The dam was constructed betwee... More
Hoover Dam, Spanning Colorado River at Route 93, Boulder City, Clark C...
Significance: It is a National Historic Landmark, an American Civil Engineering Landmark, and the focus of an historic district listed on the National Register of Historic Places. The dam was constructed betwee... More
Hoover Dam, Arizona-Nevada Switchyard, U.S. Highway 93, Boulder City, ...
Significance: It is one of six switchyards built between 1935 and 1952 to provide terminals for major transmission lines carrying electricity to markets in California, Nevada, and Arizona. All of these faciliti... More
Hoover Dam, Arizona-Nevada Switchyard, U.S. Highway 93, Boulder City, ...
Significance: It is one of six switchyards built between 1935 and 1952 to provide terminals for major transmission lines carrying electricity to markets in California, Nevada, and Arizona. All of these faciliti... More
Hoover Dam, Los Angeles Relay Control Building, U.S. Highway 93, Bould...
Significance: It was a critical element of the Hoover Dam electrical generation and transmission system. Although it was associated by name with the Los Angeles Bureau of Power and Light 387.5/275 switchyard, t... More
Bureau of Mines Boulder City Experimental Station, Ore Dressing Pilot ...
Significance: Building 600, as part of the Date Street Complex, was a component of the Bureau of Mines Electrometallurgical Research Facility located in Boulder City. As such, it is within the designated Bould... More
Bureau of Mines Boulder City Experimental Station, Ore Dressing Pilot ...
Significance: Building 600, as part of the Date Street Complex, was a component of the Bureau of Mines Electrometallurgical Research Facility located in Boulder City. As such, it is within the designated Bould... More