# Relationship history for MSHA mine 0202215

Current hierarchy: **Dunphy David-Mike Hodge → Ron Stanley Contracting Company → Coyote Gravel Pit**

- 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:** Coyote Materials Company → Coyote Gravel Pit; 1984-07-01 to 1984-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Pate Harvey L → Coyote Gravel Pit; 1984-07-01 to 1984-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Pate Harvey L → Coyote Materials Company; 1984-07-01 to 1984-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Ron Stanley Contracting Company → Coyote Gravel Pit; 1984-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dunphy David-Mike Hodge Et Al → Coyote Gravel Pit; 1984-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dunphy David-Mike Hodge Et Al → Ron Stanley Contracting Company; 1984-11-01 to current/open; source msha-controller-operator-history