Barnhart Quarry, located in Jefferson County, Missouri, supplies high-quality crushed and broken limestone NEC ideal for a wide range of construction and infrastructure projects. Situated conveniently off I-44 near St. Louis, this surface quarry, operated by New Frontier Materials, employs 32 and ensures reliable material delivery to meet demanding project schedules.
Operator
New Frontier Materials Operations Alpha, LLC
Parent Company
RWNIH-OP Holdings LLC; PEPI Capital, L.P.; 42 North Resources Partners I
Company Type
Other
95
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38.333056, -90.380000
Data Source
Mine Safety and Health Administration (MSHA)
Last updated: 1/30/2026
MO Hwy 21 and Butler Hill Road, MO
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