# Relationship history for MSHA mine 3602679

Current hierarchy: **Donovan Construction Company → C & P Coal Company Inc → Casper 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** C & P Coal Company → Casper Pit; 1950-01-01 to 1977-01-20; source msha-controller-operator-history
- **controller_controls_mine:** Pelesky Michael → Casper Pit; 1950-01-01 to 1977-01-20; source msha-controller-operator-history
- **controller_controls_operator:** Pelesky Michael → C & P Coal Company; 1950-01-01 to 1977-01-20; source msha-controller-operator-history
- **operator_operates_mine:** C & P Coal Company Inc → Casper Pit; 1977-01-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Donovan Construction Company → Casper Pit; 1977-01-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donovan Construction Company → C & P Coal Company Inc; 1977-01-21 to current/open; source msha-controller-operator-history