Southern California Regional Rocks and Roads
Your Resource For Highways, Geology, Railroads, History, Bicycling, And More Throughout Southern California Since 1995. Celebrating 30 Years Online!
Big news for the Historic Highway 99 Association of California! They are getting ready to complete their first project, replacing the old and faded signs in Calexico at the south end of US 99. It is a small project but one worth the effort and a great step forward.
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:
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 … Read more
Part 1 – Edom to Banning Varner Road and Garnet RoadThousand Palms to Garnet From Thousand Palms to Garnet, old US 99 ran along Varner Road and Garnet Road. This was the original alignment and lasted until the 1940’s when this section was upgraded to an expressway on a new alignment. In January 1922, construction … Read more