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Collection includes correspondence, reports, drafts, notes, legal documents, maps, diagrams, and photographs relating to geologic investigation done for the Pacific Gas and Electric Company and other firms and agencies. The more important projects...

30 p. This pamphlet, published by the Bonneville Power Administration, details that body's construction of the Bonneville and Grand Coulee dams. It discusses the benefits from improved inland navigation and transportation, irrigation, and power...
1940-11-01
Appendix A. Hydrologic analysis -- Appendix B. Preliminary dam design, reservoirs and conveyance system -- Appendix C. Summary of the geotechnical investigations
1987-04-01
2007-01-02
2007-01-02
Appendix A. Hydrologic analysis -- Appendix B. Preliminary dam design, reservoirs and conveyance system -- Appendix C. Summary of the geotechnical investigations
1987-04-01
2007-01-02
2007-01-02
Here is shown the assembly and installation of the tandem ring-seal gates for the outlet tubes before embedding in concrete. Sections of the 8 1/2 foot diameter steel tube liners were set in position and then welded into a continuous tube.
2020-01-26
This is a view in a 950 elevation gate chamber, showing the method of installing and removing the 16 ton crane beams from the ceiling during maintenance operations on the gates. The upper head or ring of the hoist car is raised by hydraulic...
2020-01-26
This is a view inside one of the outlet tubes, showing the lower part of the gate leaf, and the upper part of the follower ring, which follows the gate leaf up and closes the gap left in the conduit by removal of the gate leaf. In the background...
2020-01-26
Here is shown a typical arrangement of the ring seal gates previous to final embedding. The pipes rising at the ends of the gate bonnets are the 16 inch diameter air vents for these gates. <br> In the foreground are the gate leaves and...
2020-01-26
Here are two of the huge hydraulic lift cylinders for the ring-follower outlet gates located at elevation 950 in the dam. These gates form the upstream pair of the tandem gates, while paradox gates set on the opposite side of the gallery form the...
2020-01-26
In a news article, Dr. Walter Lindley describes his tour of the Los Angeles Aqueduct and his various stops along the way. Engineer William Mulholland is mentioned as giving information to Lindley's tour group on the state of the aqueduct.
The collection consists of approximately 360 technical drawings related to three Avista Corporation hydroelectric developments on the Spokane River: Nine Mile Dam (at Nine Mile Falls on the Spokane River), Monroe Street Dam (in downtown Spokane),...

Correspondence between Delph Carpenter and others concerning the Federal Power Commission's authority to carry out hydroelectric projects in the Colorado River Basin and whether or not the commission was required to act within the terms of the...

2016-03-09
2016-03-09
Power dam on Willamina Creek, tributary of South Yamhill River near Willamina, Oregon The dam is located a short distance above the bridge on Highway 18; 1940-09-29
2020-01-26
2003-01-01
Selected material from volume one of: "A History of the Columbia Basin Project: Volume I"

2020-01-26
Fishway at the Eugene, Oregon, power plant dam on the McKenzie River;1938-06
2020-01-26
2003-01-01
Correspondence between Delph Carpenter and others concerning the Federal Power Commission's authority to carry out hydroelectric projects in the Colorado River Basin and whether or not the commission was required to act within the terms of the...

2016-03-09
2016-03-09
Fish ladder over power dam at Willamina, Oregon, on Willamina Creek which is a tributary of the South Yamhill River 1940-09-29
2020-01-26
2003-01-01
Chinook in tail-race at the River Mill Power Plant on the Clackamas River; 1938-06
2020-01-26
2003-01-01
Logan River below Second Dam, showing intake flume of Hercules Power Plant, Logan Canyon, Utah, about 1903. Peter Larsen Collection. One black and white photograph (7.5 x 9.5 inches) mounted on board. (Negative Available).
2020-01-26
Power plant tail-race and mouth of fish ladder at the River Mill Power Plant on the Clackamas River;1940-08-23
2020-01-26
2003-01-01
Colorado Springs Utilities Nixon Power Plant dedication ceremony. Side A - 0:00-4:55 Master of Ceremonies and Colorado Springs Director of Public Utilities James D. Phillips introduces special guests, including Ray D. Nixon, his wife Jo, and his...
1980-01-26
2016-05-06
2016-05-06
Large pipe that crosses the river at Wheelon Power Station, Bear River Canyon, Utah. Black and white photograph, 6.25 x 8.25 inches.

Selected material from volume three of: "A History of the Columbia Basin Project: Volume III"

2020-01-26
Colorado Springs Utilities Nixon Power Plant dedication ceremony. Side A - 0:00-4:55 Master of Ceremonies and Colorado Springs Director of Public Utilities James D. Phillips introduces special guests, including Ray D. Nixon, his wife Jo, and his...
1980-01-26
2016-05-06
2016-05-06
Power dam on Willamina Creek, tributary of the South Yamhill River, located near Willamina, Oregon The power dam is located a short distance above the bridge on Highway 18; 1940-09-29
2020-01-26
2003-01-01
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