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THE HISTORICAL
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“Bite-Size Bits of Local, National, and Global History”
San Dimas in Los Angeles County, California — The American West (Pacific Coastal)
 

Site of the San Dimas Telephone Exchange

 
 
San Dimas Telephone Exchange Marker image. Click for full size.
Photographed by Craig Baker, March 15, 2021
1. San Dimas Telephone Exchange Marker
Inscription. Built in 1912 by Pomona Valley Telephone & Telegraph, the exchange served 112 telephones in San Dimas, La Verne, Claremont & Chino. The original brick building was replaced in 1959 by the San Dimas Water Company, remodeled in 1971 to the Early California Village Theme by California Cities Water Company and occupied by Golden State Water Company since 1976.
 
Erected by San Dimas Historical Society. (Marker Number 24.)
 
Topics. This historical marker is listed in these topic lists: ArchitectureCommunicationsIndustry & CommerceSettlements & Settlers. A significant historical year for this entry is 1912.
 
Location. 34° 6.438′ N, 117° 48.507′ W. Marker is in San Dimas, California, in Los Angeles County. It is on Exchange Place north of Bonita Avenue, on the left when traveling north. Touch for map. Marker is at or near this postal address: 121 N Exchange Pl, San Dimas CA 91773, United States of America. Touch for directions.

Regionally, this marker is in Greater Los Angeles and in the Transverse Ranges. It is also on the American Pacific Coast. Globally, it is in North America, on the Ring of Fire, in the Pacific Rim, in the Western Hemisphere, in the Western World, and in the Anglosphere. Historically, it finds itself in what was once New Spain and also Mexico’s Alta California.

Other nearby markers. At least 8 other markers are within walking distance of this marker: San Dimas Fruit Exchange (a few steps from this marker); San Dimas Grain Company (within shouting distance of this marker); The Walterscheid Building (within shouting distance of this marker); The Bank of San Dimas (within shouting distance of this marker);
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San Dimas Garage (about 300 feet away, measured in a direct line); Foresman & Hoke Building (about 300 feet away); Sipple Building (about 300 feet away); San Dimas Hotel (about 300 feet away). Touch for a list and map of all markers in San Dimas.
 
Water Company Building image. Click for full size.
Photographed by Craig Baker, March 15, 2021
2. Water Company Building
The marker is in the landscaping at lower right.
 
 
Credits. This page was last revised on January 30, 2023. It was originally submitted on March 18, 2021, by Craig Baker of Sylmar, California. This page has been viewed 364 times since then and 21 times this year. Photos:   1, 2. submitted on March 18, 2021, by Craig Baker of Sylmar, California. • J. Makali Bruton was the editor who published this page.
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Jun. 23, 2026