Category Archives: California

Archives, California, District 7, Highways, History, I-5, Image, Los Angeles County, Roads, Southern California, SR-14, US 6, US 99

Featured Image – 7/22/2021

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US 6 / US 99 Interchange in 1955. Courtesy – Caltrans

In 1955, the first section of the Golden State Freeway opened. It was a short section, running from near Weldon Summit to Foothill Blvd. The freeway was the first major attempt to improve traffic in the Newhall Pass area and it did help for a time. The freeway remained until the early 1970’s when the new I-5 / State 14 interchange was constructed and the old freeway was reconfigured to become the “Truck Lanes”.

Today, the original interchange still remains, though not entirely used. The lower level, formerly the US 6 West to US 99 South connector, is now partially filled in. The second level still carries Sierra Highway with the top level carrying the I-5 Truck Lanes. The Newhall Pass has undergone many changes in its time as a transportation corridor for Los Angeles. This one was but one of those. The photo was taken on November 22, 1955.

Archives, California, History, Image, Lake Elsinore, Maps, Riverside County, San Diego County, Southern California

Featured Image – 5/21/2021

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From the Archives –

This map of the Lake Elsinore area comes to us from San Diego County dating from November 1883. At the time, Elsinore was a part of San Diego County. In 1893, this area became a part of Riverside County.

California, Disaster, Earthquake, Event, Fault, Geology, Southern California, USGS

Earthquake Information

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Felt an earthquake? Want to know where it was and how big? Follow the links below to get up-to-date information from the USGS and the California Geological Survey.

If you felt the earthquake, let the USGS know by contacting them at: “Did You Feel It?“ This data helps them determine magnitude of the earthquake, how the geology affects that, and how the type of structure reacts to the event. Most earthquakes larger than 4.0 are listed in the “Events”  section of the page.

Additional Earthquake Information:

California, Caltrans, District 8, Highways, History, I-10, Image, Old Bridge, Rivers, Roads, San Bernardino, San Bernardino County, Santa Ana River, Southern California, US 395, US 70, US 91, US 99

Featured Image – 5/5/2021

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“Crossroads Interchange” in 1958. Courtesy – Caltrans

This photo shows the I-10 / I-215 interchange in San Bernardino, California as it existed in 1958. At the time, those numbers didn’t quite exist. Back then, this was the junction of US 70, US 91, US 99, US 395, and State 18. The view is looking south along what is now I-215 with the Santa Ana River bridges in the foreground. The bridge to the left was US 99 until the 1930’s. The two bridges to the right are still around, though widened.

California, District 5, Highways, History, Image, Old Alignment, Old Bridge, Roads, San Luis Obispo County, SR-178, SR-58

Featured Image – 2/17/2021

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1914 Parker Truss Salinas River Bridge (49-0109)

Five miles east of Santa Margarita, State 58 crosses the Salinas River. Until 1996, the highway crossed via this 1914 Parker truss span. From 1934 to 1964, the bridge was crossed by State 178, which became State 58 in 1964. The approach to the old bridge included two sharp curves at either end, which the new concrete bridge (49-0237) and alignment eliminated. Today, it is closed to motor vehicle traffic and marked as a Historic Bridge. The new bridge is to the north of this at SLO-58-R4.8.