Browse mineral resources

Albright Quarry

Past Producer • Stone, Crushed/Broken

Howe Quarry

Producer • Stone, Crushed/Broken

Fort Madison Phosphoric Acid Plant

Past Producer • Phosphorus-Phosphates

Unknown

Past Producer • Sand and Gravel, Construction

Menlo Quarry

Producer • Stone, Crushed/Broken

Jefferson Quarry

Producer • Stone, Crushed/Broken