Trinity River transmission line

[Trade Journal]

Publication: Western Electrician

Chicago, IL, United States
vol. 42, no. 3, p. 72, col. 2


The hydro-electric plant at Trinity River, Cal., is one of the power-transmission systems which have been constructed with an eye to the future rather than the present needs of the communities which they serve. It is located in the central part of Trinity County, Cal., two miles below the town of Junction City, where Canon Creek, from which the water used for power is obtained, flows into the Trinity River, having a drainage area of 52 square miles. The dam, which is small, serves merely for diverting the water. Alternating sections of ditch and open flumes, with a total length of 5,250 feet and a tunnel 1,821 feet long are comprised in the system. An effective head of 600 feet, or working pressure of 260 pounds per square inch, is obtained from two penstocks, each 1,165 feet long. This power house is equipped with Allis-Chalmers electrical machinery, consisting of two three-phase, 25-cycle generators, each 750 kilowatts, 500 revolutions per minute, 2,200 volts; seven step-up transformers, and auxiliary apparatus. A description of the entire plant, quite complete, is given in Allis-Chalmers bulletin No. 2027, and will be found of interest by engineers and students.


Keywords:Power Transmission : Glass : Micarta-Core Insulator
Researcher notes:This line is where the micarta-core suspensions were found. Shards of the glass suspensions were found at the Hemingray Glass Co. factory site.
Supplemental information:Articles: 8865, 5246, 10187 Patent: 1,015,229 Photos: 28485647, 109465179, 109464952, 109469485
Researcher:Bob Stahr
Date completed:October 2, 2009 by: Bob Stahr;