Benson Mines' construction aggregates business is performed under an exclusive relationship with Paul Mitchell of Mitchell Stone Products. Benson's high friction stone is DOT certified for road and rail use. MSP operations support the delivery of construction aggregates by truck and rail transit throughout New York State. A profile of MSP stone products can be found here.

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On November 7, 2025, railcars carrying 500 tons of Benson Mines' aggregates departed for New York City. This transport is part of a multi-year partnership with Astro Aggregates, LLC. The press release announcing this partnership can be read here.