Marker Logo HMdb.org THE HISTORICAL
MARKER DATABASE
“Bite-Size Bits of Local, National, and Global History”
“Bite-Size Bits of Local, National, and Global History”

Near Mt Baldy Village in Los Angeles County, California — The American West (Pacific Coastal)
 

Pomona Water Power Plant

 
 
Pomona Water Power Plant Marker image. Click for full size.
By Joseph Beeman, March 8, 2006
1. Pomona Water Power Plant Marker
Inscription.  The first hydroelectric installation in California for long-distance transmission of alternating current at high voltage was built in 1892 on San Antonio Creek below this spot by the San Antonio Light and Power Company organized by Dr. Cyrus Grandison Baldwin, President of Pomona College. The first high-voltage transformers built by George Westinghouse for this installation provided for transmission of 10,000 volts from this plant to Pomona.
 
Erected 1955 by California State Park Commission and The Historic Society of Pomona Valley. (Marker Number 514.)
 
Topics and series. This historical marker is listed in this topic list: Industry & Commerce. In addition, it is included in the California Historical Landmarks series list.
 
Location. Marker has been reported missing. It was located near 34° 12.735′ N, 117° 40.564′ W. Marker was near Mt Baldy Village, California, in Los Angeles County. Marker was on Mt Baldy Road (at milepost 2), 3 miles north of North Mountain Avenue, on the right when traveling north
Pomona Water Power Plant Monument image. Click for full size.
By Joseph Beeman, March 8, 2006
2. Pomona Water Power Plant Monument
. Marker is in San Antonio Canyon, north of Upland, near the county line with San Bernadino County and just outside of the San Bernadino National Forest. Touch for map. Marker was in this post office area: Mt Baldy CA 91759, United States of America. Touch for directions.
 
Other nearby markers. At least 8 other markers are within 8 miles of this location, measured as the crow flies. Waiting Station (approx. 4.2 miles away); G.P. Ledig House (approx. 6 miles away); Demens-Tolstoy House (approx. 6.2 miles away); Schowalter Rock Pile (approx. 6.6 miles away); a different marker also named Schowalter Rock Pile (approx. 6.7 miles away); Alta Loma Honor Roll (approx. 7 miles away); Cahuilla Park (approx. 7.2 miles away); Vietnam Memorial Rose Garden (approx. 7.3 miles away).
 
Also see . . .  San Antonio Power Plant. From the San Bernadino Valley Electric History site. (Submitted on March 9, 2006.) 
 
In The Snow image. Click for full size.
By Joseph Beeman, March 11, 2006
3. In The Snow
Marker is Missing image. Click for full size.
By Craig Baker, May 4, 2020
4. Marker is Missing
 
 
Credits. This page was last revised on August 17, 2020. It was originally submitted on March 9, 2006, by Joseph Beeman of Upland, California. This page has been viewed 2,521 times since then and 85 times this year. Last updated on May 8, 2020, by Craig Baker of Sylmar, California. Photos:   1, 2. submitted on March 9, 2006, by Joseph Beeman of Upland, California.   3. submitted on March 12, 2006, by Joseph Beeman of Upland, California.   4. submitted on May 8, 2020, by Craig Baker of Sylmar, California. • Syd Whittle was the editor who published this page.
Paid Advertisement
Oct. 27, 2020