San Marcos Pass Road - Santa Ynez CA
The National Industrial Recovery Act helped construct 2 1/2 miles of road from the Santa Ynez river to Santa Ynez. Two bridges were constructed, one, a 765-foot reinforced concrete bridge across the Santa Ynez river, and a 128-foot reinforced concrete bridge over the Santa Argueda creek. Completion date: Nov. 1934
From Google maps street view, it looks as if further reconstruction has since occurred because the the bridge over the Santa Ynez river is no longer connected to the highway and is abandoned.