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.
To commemorate the 50th anniversary of the February 9, 1971 M6.6 Sylmar / San Fernando Earthquake, our featured image shows the construction work in progress on the I-5 and State 14 interchange in 1970. This work would be halted abruptly in the early hours of February 9, 1971. After this, it would be reconstructed two more times. The earthquake changed the way freeways such as this were built and did further seismic codes throughout the state.
For further information about the interchange:
I will be hosting an online meeting next month to discuss Highway 99 in Southern California. It will be open to questions about the highway, its history, the Ridge Route, the Highway 99 Association of California, and depending on time – connecting highways like US 6. If you’d like to submit a question, use the form below and we’ll do our best to answer them in the meeting. This is your chance to meet the author of this site and learn more about California’s Main Street!
The meeting will be hosted on Zoom on Wednesday, February 10, 2021 from 5:30 pm to 6:30 pm. Registration will be required. Use the link below to register.
https://zoom.us/meeting/register/tJUvf–rqDIvEtR2MLhNCbOxaLzbHwm24vsG
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Part 2 – Banning to Calimesa Banning and BeaumontRamsey St and 6th St Through the town of Banning, US 99 was first paved with a 16′ concrete slab in 1922, similar to sections east of town. Minor improvements were made a few years later in 1925. Beaumont would get theirs in 1923, albeit a with …
Southern California Regional Rocks and Roads
Exploring the highways, geology, history and landscapes of Southern California.