One bound ledger records maintenance to the bridge between March 1, 1944 to March 30, 1946. Colorful ink drawings embellish the endpapers. There are also a few clippings regarding the bridge's history. A few photographs have been filed with the Museum's pictorial collections.

The Tower Bridge, which spans the Sacramento River from the foot of Capitol Mall (M Street) to West Sacramento replaced an earlier swing-span bridge. Rails were first laid across that bridge in 1912 to carry the trains of the Sacramento & Woodland and the Oakland, Antioch & Eastern Railroads (which were later merged into the Sacramento Northern Railroad). During the sixteen-month construction period, automobile traffic was routed across the M Street Bridge, while the Sacramento Northern electric trains operated across a temporary wood bridge, located just adjacent upstream. The new bridge was dedicated December 15, 1935. The last Sacramento Northern train over the Tower Bridge operated on November 15, 1962.

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