Weeping Water Mine, operated by Martin Marietta Materials in Cass County, Nebraska, provides high-quality crushed and broken limestone NEC suitable for a variety of construction and infrastructure projects. Located near Hwy 50 and accessible via Adams Street, this underground mine serves the Gretna and surrounding Nebraska markets. With 95 employees, Weeping Water Mine is a large-scale operation capable of meeting significant material demands.
Operator
Martin Marietta Materials Inc
Parent Company
Martin Marietta Materials Inc
Company Type
Corporation
146
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40.871111, -96.120833
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
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