# Relationship history for MSHA mine 0300876

Current hierarchy: **Haskell  L  Dickinson II → McGeorge Contracting Company Inc → Granite Mountain Quarry #2**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** McGeorge Contracting Company Inc → Granite Mountain Quarry #2; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Haskell  L  Dickinson II et al → Granite Mountain Quarry #2; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Haskell  L  Dickinson II et al → McGeorge Contracting Company Inc; 1950-01-01 to current/open; source msha-controller-operator-history