IIRC, Mare Island bridge is being inspected by CHP.
The really damaged part is the overpass on SR37 that crosses Sonoma Blvd/SR 29. IIRC buckling was between Sonoma Blvd and Fairgrounds on SR 37
To summarize:
A 6.0-magnitude earthquake epicentered at the southern edge of Napa struck at 3:20 a.m.
Damage is reported in the city of Napa ranging from the collapse of commercial building facades in downtown Napa to extensive exterior and interior damage of single-story homes in the surrounding area.
Witnesses are reporting two major fires at the northern end of Napa, one possibly in a mobile home park.
PG&E reports thousands of homes are without power in Napa and Sonoma counties and Vallejo in Solano County.
The California Highway Patrol and Caltrans are assessing damage to roads in the North Bay. Numerous pictures of buckled roads have appeared on Twitter