Fort Calhoun Underground Mine, operated by Martin Marietta Materials Inc., is located in Fort Calhoun, Washington County, Nebraska. This underground quarry produces crushed, broken limestone NEC, serving the regional construction and infrastructure markets with high-quality aggregate materials.
Operator
Martin Marietta Materials Inc.
Parent Company
Martin Marietta Materials Inc
Company Type
Corporation
187
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41.473889, -96.012500
Data Source
Mine Safety and Health Administration (MSHA)
Last updated: 1/30/2026
From Franklin, Ne. Travel South 1-mile on Hwy 10 to E Rd. Go West on E Rd. 3-minles to 29 Rd. Turn South on 29 Rd. and travel 2 1/4 miles to a wide driveway entrance (cattle guard)on the East side of the road. Travel thru pasture to the top of the hill where mine is at., NE
Crushed, Broken Limestone NECS OF HWY 77 ON S DOWNING ST AND 1/3 M E OF S DOWNING ON HILLS FARM RD ON THE S SIDE, FREMONT - 2101 E HILLS FARM RD, FREMONT NE 68025, NE
Construction Sand and Gravel7 miles North of Ashland NE 1 mile East 249 County Road G, NE
Construction Sand and GravelSouth of highway #275 1/2 mile on Luther Rd Freemont NE The Pit is on located on the East side of the road, NE
Construction Sand and Gravel