Fort Independence Quarry — Quarry and material-source record

Primary commodity in source: Sand, Industrial NEC; Operator in source: Grinding Rock Aggregates. Recorded location: Inyo, CA. Review the recorded source identity, location and material information together. Confirm current eligibility and operating details with the original publisher.

StateCA

Source-backed record from MSHA active surface aggregate mine register. Browse the labeled observations and original source below.

Source collection
MSHA active surface aggregate mine register
Source checked
2026-10-15

Reported record details

Fields retain their source labels and context. Read the original source for full details, qualifications and current status.

Source data row 8016

MSHA mine-register snapshot. Active means the status reported in this download, not a current operating guarantee or DOT materials approval. Coordinates are reported by the source and may represent portable operations.

MSHA mine ID
0405959
Mine name in source
Fort Independence Quarry
Mine type in source
Surface
Status in source
Active
Status effective date in source
07/23/2023
Operator in source
Grinding Rock Aggregates
State
CA
County
Inyo
Nearest town in source
Fort Independence
Primary commodity code
144600
Primary commodity in source
Sand, Industrial NEC
Portable operation flag (Y/N)
N
Reported latitude
36.841667
Reported longitude
-118.2375

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Retrieved 2026-10-15. Original files remain with their publishers; the displayed fields and navigation retain their source context.

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