Portable #1 — Quarry and material-source record

Primary commodity in source: Construction Sand and Gravel; Operator in source: Mercer Fraser Co. Recorded location: Humboldt, 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 surface aggregate mine register. Browse the labeled observations and original source below.

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

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Source data row 8015

MSHA mine-register snapshot: INTERMITTENT operation in the source. This is not a claim of continuous production, current availability or DOT materials approval. Coordinates are reported by the source and may represent portable operations.

MSHA mine ID: 0405958
Mine name in source: Portable #1
Mine type in source: Surface
Status in source: Intermittent
Status effective date in source: 06/18/2025
Operator in source: Mercer Fraser Co
State: CA
County: Humboldt
Nearest town in source: Blue Lake
Primary commodity code: 144200
Primary commodity in source: Construction Sand and Gravel
Portable operation flag (Y/N): Y
Reported latitude: 34.823333
Reported longitude: -118.945278

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—	Source data row 8015 · MSHA mine-register snapshot: INTERMITTENT operation in the source. This is not a claim of continuous production, current availability or DOT materials approval. Coordinates are reported by the source and may represent portable operations.

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Source data row 8015

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