Kelly, you make a very good point, this bridge is "semi-active" and would need to be used if any rolling stock is moved into the area. I suspect the Capitola bridge you refer to this this one. http://bridgehunter.com/ca/santa-cruz/bh46748/
Keep in mind this is still an semi-active rail line. It was owned by the UP, but was just sold to the Santa Cruz County. The line will operated by Sierra Northern Railroad. Although I do not live in the area, I have been there (my grandmother lived in Watsonville). There is also a great bridge at Capitola.