December 17, 2013 - Bixby Bridge

[CaliforniaMama]

Here it is in the historical article you quoted.

Large advertisements were placed in The Herald honoring Murphy's contribution. Its trucks were used to haul the Douglas fir from the railroad yards in Monterey to the bridge site and the company also supplied sand and gravel for the concrete from a plant in Big Sur. The road at the time was one-way with hairpin turns, making trips very dangerous for the drivers of large trucks.

So, I was wrong about the Palo Colorado Canyon trees. Wonder what that logging was for then?