Legacy of US Route 466 Part 1; California State Route 46
Legacy of US Route 466 Part 2; Tehachapi to Bakersfield
As discussed in Part 1 of the US Route 466 Legacy series the western terminus of US Route 466 ("US 466") from it's inception until truncation in the 1965 was located in Morro Bay at California State Route 1 ("CA 1"). US 466 between Morro Bay and Shandon had two two primary alignments through it's history. The initial 1933 routing of US 466 east from Morro Bay to Shandon was on Legislative Route Number 125 ("LRN 125") as follows:
US 466/LRN 125 began at CA 1 at the corner of Main Street and Atascadero Road in Morro Bay. US 466/LRN 125 followed Morro Creek and Atascadero Creek eastward on Atascadero Road to the City Limits of Atascadero. US 466/LRN 125 entered the City of Atascadero on Morro Road.
US 466/LRN 125 followed Rocky Canyon Road into what is now the CalPortland Rocky Canyon Quarry. US 466/LRN 125 passed through the Rocky Canyon Quarry and ascended what is now the Rocky Canyon Trail. US 466/LRN 125 would have transitioned onto the eastern segment of Rocky Canyon Road atop of Rocky Canyon.
The first documents acknowledging the existence of US 466 in California can be found during October/November 1933 in the AASHO Database. Interestingly the document from October 25th, 1933 seems to imply the AASHO assumed US 466 was intended to utilize LRN 33 from Shandon west to Paso Robles and multiplex US 101/LRN 2 to Atascadero. The December reply by the Division of Highways omits Paso Robles from the alignment of US 466 from Atascadero east to Shandon.
US 466 begins to appear on commercial highway maps of California beginning in 1935. US 466 is seen on the 1935 Gousha Highway Map of California multiplexing CA 41 into Shandon and splitting southwest towards Creston on an unpaved LRN 125. US 466 can seen traversing Rocky Canyon to Atascadero and terminating at CA 1 in Morro Bay.
The 1938 Division of Highways Map shows US 466 on LRN 125 between Morro Bay and Atascadero. No detail pertaining to the alignment of US 466 east of Atascadero is provided until the vicinity of Cholame.
The July/August 1948 California Highways & Public Works announced reconstruction of Salinas River Bridge east of Atascadero on US 466/LRN 125 had been awarded to contractor Ochs & Sons.
In 1964 the California State Highway renumbering took place. While US 466 was still present it's legislative designations were replaced by LRN 41 between Morro Bay to Atascadero and LRN 46 between US 101 to US 99. CA 41 was assigned to the route of LRN 125 between Shandon and Atascadero while CA 46 was signed over what was CA 41 west of US 101/US 466. LRN 137 became the current CA 229 while CA 178 west of Bakersfield was renumbered to CA 58.
US 466/LRN 125 traversed approximately 16 miles between Morro Bay east to Atascadero. US 466 ascended through a small pass along Morro Creek.
US 466/LRN 125 entered Atascadero on Morro Road where it began a brief multiplex of US 101 on El Camino Real. US 101 moved to the current freeway in 1957 which would have briefly left US 466 as the stand alone highway on El Camino Real in downtown Atascadero.
US 466/LRN 125 eastbound departed US 101/El Camino Real with a right hand turn onto West Mall in downtown Atascadero.