Blue Mountain Minerals, a Portola Minerals Company subsidiary, operates a surface limestone quarry in Tuolumne County, CA, producing high-quality crushed and broken limestone for various construction and industrial applications. Located 1.5 miles from Columbia on Marble Quarry Rd., the quarry's location provides convenient access to regional markets and transportation infrastructure, supported by a dedicated team of 54 employees.
Operator
Blue Mountain Minerals
Parent Company
Portola Minerals Company
Company Type
Corporation
124
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38.069444, -120.423056
Data Source
Mine Safety and Health Administration (MSHA)
Last updated: 1/30/2026
Out of service/shop storage location. 90 Industrial Way, Beckwourth, CA 96129, CA
Construction Sand and GravelI-80W to CA 37 towards Novato, Right on Hwy 101 N to Exit 479 and go Left. Right onto Stony Point Rd, Left on Roblar Rd. Mine is on Left, CA
Construction Sand and GravelFrom F/O take I-10 West to 215 North to the I-15 North, to the 395 to Fort Independence. Juts past Fort Independence, turn left on dirt road, W. Dusty Ln. and follow to mine., CA
Sand, Industrial NECFrom Hwy 41, head West on Hwy 145 for approximately 1 mile. Turn left onto 40450 E. Hwy 145, Madera, CA 93636., CA
Crushed, Broken Stone NEC