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SPEC AGG QUARRY

Specification Aggregates, 18401 W. Colfax Ave., Golden; 39.707895, -105.207055; 39 42 28, 105 12 25; 9 :15, Jefferson County, CO
MSHA ID0500860
TYPESurface
MATERIALCrushed, Broken Sandstone
EMPLOYEES32

ABOUT

Spec Agg Quarry, operated by Martin Marietta Materials in Golden, Colorado, supplies high-quality crushed and broken sandstone for a variety of construction applications. Located near Denver in Jefferson County, the surface quarry efficiently serves regional markets with consistent aggregate products.

MATERIALS PRODUCED

Crushed, Broken Sandstone

COMPANY INFORMATION

Operator

Martin Marietta Materials

Parent Company

Martin Marietta Materials Inc

Company Type

Corporation

DIRECTIONS

9

CONTACT

Contact information not available for unclaimed listings.

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39.707778, -105.206944

Data Source

Mine Safety and Health Administration (MSHA)

Last updated: 1/30/2026