MONOGRAPHS OF KINNEY COUNTY’S ARCHITECTURAL HERITAGE: Fort Clark's Powder Magazine

May 07, 2026

by Fort Clark Heritage Council, Bill Haenn, FCHC Senior Historian

This bi-weekly feature examines the enduring unique architecture to be found here in Kinney County by spotlighting individual buildings and providing brief histories, complimented by period photographs.

Our intent is to explore the past, inspire the present, and build the future by showcasing the remarkable associations and legacies of structures which have stood the test of time and continue to contribute so much to the exceptional heritage of Kinney County. Our next subject is “Fort Clark’s Powder Magazine,” perhaps Fort Clark’s oldest building; it was placed on the National Register of Historic Places as a contributing structure to the Fort Clark Historic District in 1979.

MAGAZINE is the name for a place within which explosives and ammunition are stored. It is taken from the Arabic word "makahazin" meaning "warehouse." The safe storage of gunpowder and firearms necessitated a secure and relatively fireproof building on every post. This windowless building was designed so that the thick stone walls would channel the force of an explosion upward. The first recorded mention of this small square building is found in Colonel Joseph K. F. Mansfield’s report of his inspection of Fort Clark conducted 1-3 July 1856.

Magazine. The walls of this building are up & of stone, but as there was an order not to use building materials without orders, it was suspended & no roof on it. The ammunition of the post is kept therefore in the Commissary store & in good order. There is not much here. Yet it is a post where there should be room for storage of abundant supply to meet the demands of escorts etc. & the magazine should be completed. An ordnance Sergeant is well placed here & is quartered in a good log building with shingled roof.

Although no plans or drawings have been found for a standard powder magazine it can be speculated they existed, especially in Texas, as the surviving powder magazine at Fort Duncan in Eagle Pass is nearly identical to Fort Clark’s. Originally windowless, the building was used to store gunpowder and ammunition over its long service life of nearly 90 years. The building was the responsibility of the post ordnance sergeant. It was finally used to store chemical munitions during World War II. Based on the date of Mansfield’s inspection the building is now 170 years old.

Windows were cut in three sides of the building in the 1980s. Today the building has been repurposed to serve as a Visitor Center for our National Register Historic District. Here visitors can experience a sampling of Fort Clark’s amazing history, gain an appreciation for the extent of the grounds, and orient themselves for a tour of the Historic District.

Monographs of Kinney County’s Architectural Heritage is written by Bill Haenn, FCHC Senior Historian. Fort Clark Heritage Council is a 501(c)3 non-profit organization, established in 2023, to advocate for the preservation and protection of the architecture and other historic resources in the Fort Clark National Register Historic District for the benefit of the visiting public and future generations, providing for the advancement and strengthening of heritage tourism initiatives by growing recognition of and visitation to the Fort Clark Historic District and being committed to endorsing and promulgating the rich history of Fort Clark by expanding upon related educational and research efforts.