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Granite Construction, Inc.
Diversified heavy civil and highway contractor and construction materials producer.
http://www.graniteconstruction.com/
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Hanson PLC
Operating in 17 countries and employing over 28,000 people worldwide, Hanson is the world's largest producer of aggregates and the third largest producer of ready-mixed concrete.
http://www.hansonplc.com/
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Hydraulic Press Brick Company
Manufacturers of Haydite expanded shale, lightweight aggregates for structural concrete and masonry applications, horticultural and bonsai soil amendments, and landscaping ground covers.
http://www.hpbhaydite.com
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New Ulm Quartzite Quarries
Producer of crushed aggregates for concrete, bituminous, road base, railroad ballast, and industrial grits.
http://www.nuqq.com/
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Upper Canada Stone
Supplier of specialty aggregates, sands, and mineral fillers to architectural and industrial customers.
http://www.uppercanadastone.com/
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