construction workers bolting railroad ties to new tracks


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Railroad construction workers bolting ties to the new tracks of the San Francisco Municipal Railway.­

In this project, reinforced concrete is poured under the rails, and the rail ties bolts (large black bolts) will be encased in that layer of concrete.­

View more photos of railroad workers replacing a Muni lightrail tracks in San Francisco.

598-630 Duboce Ave, San Francisco, CA 94114, USA