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Montana Limestone Company

An operator loads raw limestone from the quarry.

The Montana Limestone Company (MLC), a subsidiary of Dakota Coal Company (Dakota Coal), operates a limestone quarry 70 miles south of Billings, MT. The limestone reserves are owned by the Bighorn Limestone Company.

Dakota Coal has certain rights to the limestone reserves mined by MLC and has invested in operational changes that have improved limestone quality. Dakota Coal Company is a subsidiary of Basin Electric Power Cooperative, Bismarck, ND.

The quarry is recognized as one of the area's leading names in the production of chemical grade limestone rock. It is an efficient operation that dates back many decades. The quarry was originally developed to provide limestone for use in the sugar beet industry.

The customer list has grown to include Wyoming Lime Producers, a division of Dakota Coal Company that operates a lime kiln operation near Frannie, WY. The lime produced there is a vital ingredient in removing sulfur dioxide from stack emissions at Basin Electric’s coal-based power plants and water treatment facilities in Wyoming and North Dakota.

Rock's New Role

Annual sales from MLC's quarry and fine grind plant average about 650,000 tons. The fine grind plant produces various sizes of ground limestone. These high-calcium, ground products are available in bags or bulk for industrial, agricultural and mining applications. Chemical grade limestone is provided at a level of +95% calcium carbonate.

The MLC quarry offers several different sizes of limestone for private and commercial landscaping needs.

Limestone Uses:

• manufacture of concrete
• road construction
• rip-rap for erosion prevention
• residential and commercial applications
• sulfur removal in coal combustion
• boilers

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• Montana Limestone Company
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Download a Montana Limestone Company product price list (in pdf)

Contact information:
Montana Limestone Company
PO Box 166
Frannie, WY
82423-0166
Tel: 406.764.2513
(Plant site is located near
Warren, MT.)

Dakota Coal Company
PO Box 5540
Bismarck, ND 58506-5540
Tel: 701.221.4455