Iron Springs Quarry, 150 feet west of Grand Loop Road, 20 miles east of U.S. Highway 287, West Thumb, Teton County, WY

Significance: The Iron Spring Quarry served as a source of rock and gravel for road construction and maintenance projects in Yellowstone National Park. Due to the feature's mundane nature, the historic record contains little information about the quarry. Nevertheless, its character and its location adjacent to the Grand Loop Road suggest that the site may have contributed material for use in rock retaining walls and embankments, and as riprap, subgrade, and aggregate for bituminous surfacing.
Survey number: HAER WY-82