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Fort Stevens: Power Plant and Plotting Room at Battery Clark (photo diary) [1]

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Date: 2024-12-14  

Fort Stevens began in 1863 as a Civil War fortification guarding the mouth of the Columbia River in Oregon. In 1897, the U.S. Army began construction of the William Clark Battery (named for the Clark of Lewis and Clark). The battery, which was completed in 1898, was constructed with concrete and included two pits with four mortars.

In 1917, the mortars were removed from the William Clark Battery and today the cement structure stands empty, attracting tourists to explore the ruins. Shown below are the Central Power Plant and Plotting Room associated with the battery.

Central Power Plant

This facility powered most of the fort with steam powered engines that turned electrical generators. The plant operated from 1911 to 1921, when the fort connected to commercial power.

Plotting Room

Inside the plotting room was a large map where the plotters would find the triangulations for firing. In her book Fort Stevens, Susan Glen writes:

“Information about wind velocity, barometric pressure, and the height of the tide would be factored in gain accuracy for the shot.”

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