The Western Railway Museum (not to be confused with the Western Pacific Railroad Museum which I also volunteer at) has track work weekends twice a month, where we go out and do maintenance work on the several miles of track that the museum has in service. A typical Saturday consists of driving a few miles down the line and replacing every other tie under the track (which I have written about previously) or straighten and repair rail joints. This was certainly not a typical weekend.
The old Sacramento Northern line that the museum runs on has a number of trestles originally built in 1939, which inevitably need to be maintained. The project this weekend was to replace the center bent, which has been suffering from being in standing water, so we were to replace it with a shorter bent, and pour a new concrete cap on top of the old foundation to keep the wood from sitting in the water that collects underneath the bridge. Joel had already staged the new bent to the left of the old one, the concrete frame and forms on a flat car on the bridge, and jacked up the bridge.
Once we had the old bent out, we cleaned up the old foundation.
It was a fun day. I keep trying to get down to Rio Vista more often, since they work every second and forth Saturday, but college keeps getting in the way. Hopefully I'll have more time this year to work there. If anyone in the Sacramento area would like to get involved, email me and I can put you in touch with Joel, who is in charge of the track crew work weekends.