C.S.A. Saltpetre Mine
Concan, Uvalde County, Texas
Marker Inscription
Important to Texas in waging the Civil War. Site of natural deposits of bat guano, worked in the 1860s to obtain the chief ingredient for gunpowder. Cave inhabited by bats, source of the guano, extends about 23 miles. One room in the great bat den is 585' x 325', and has a 45' ceiling. A narrow gauge railway with mule drawn cars was used in the digging. Corrals for the mules occupied one chamber of the cave. Putrefied and dried bat guano, mixed with smaller parts of sulphur and charcoal, gave firepower to Civil War guns. 1965
Erected by Texas Historical Commission
The Story
During the Civil War the Confederacy was chronically short of gunpowder, and inventive locals turned to whatever nitrate sources they could find. Here in the Texas Hill Country, workers mined the deep deposits of bat guano inside a vast limestone cave, extracting saltpetre — the essential ingredient of black powder — and combining it with sulphur and charcoal. A narrow-gauge railway with mule-drawn cars carried the diggings out of chambers so large that one room measured hundreds of feet across, with the mules themselves stabled underground.
Why it matters
It shows how the blockaded Confederacy improvised its war materiel from the raw resources at hand, turning a remote Texas bat cave into a strategic munitions source.
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Related events
- · American Civil War
Themes & tags
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