Narrow gauge construction train moving material to build a fill for the west gun battery at Fort Stevens, Oregon, March 3, 1897. From the Oregon Historical Society Collection.

Narrow gauge construction train moving material to build a gun battery at Fort Stevens, Oregon, February 18, 1897. From the Oregon Historical Society Collection.

Several narrow gauge locomotives moving construction material for the fortification of the west gun battery at Fort Stevens, Oregon in April 1897. From the Oregon Historical Society Collection.

Narrow gauge railroad using small steam locomotives and dump cars of large rock at Fort Stevens, Oregon with rock used in the Columbia River South Jetty, undated. Photo by Kiser Photo Company.

Narrow gauge railroad using small steam locomotives and dump cars of large rock at Fort Stevens, Oregon with rock used in the Columbia River South Jetty, undated. Photo by Kiser Photo Company.

A view of the end of the Columbia River Jetty with a large pile driver. Narrow gauge railroad using small steam locomotives and dump cars of large rock dumped along the trestle work, undated. Photo by Kiser Photo Company.