# Relationship history for MSHA mine 3601343

Current hierarchy: **Rochester & Pittsburgh Coal Company → O'Donnell Coal Company → O'Donnell No 3**

- 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:** Copper Valley Coal Company → O'Donnell No 3; 1950-01-01 to 1975-03-15; source msha-controller-operator-history
- **controller_controls_mine:** Henry Russel & Robert Gilbert → O'Donnell No 3; 1950-01-01 to 1975-03-15; source msha-controller-operator-history
- **controller_controls_operator:** Henry Russel & Robert Gilbert → Copper Valley Coal Company; 1950-01-01 to 1975-03-15; source msha-controller-operator-history
- **operator_operates_mine:** Copper Valley Coal Company Inc → O'Donnell No 3; 1975-03-16 to 1977-04-17; source msha-controller-operator-history
- **controller_controls_mine:** C P J Inc → O'Donnell No 3; 1975-03-16 to 1977-04-17; source msha-controller-operator-history
- **controller_controls_operator:** C P J Inc → Copper Valley Coal Company Inc; 1975-03-16 to 1977-04-17; source msha-controller-operator-history
- **operator_operates_mine:** Copper Valley Coal Company Inc → O'Donnell No 3; 1977-04-18 to 1984-05-03; source msha-controller-operator-history
- **controller_controls_mine:** Global Energy → O'Donnell No 3; 1977-04-18 to 1984-05-03; source msha-controller-operator-history
- **controller_controls_operator:** Global Energy → Copper Valley Coal Company Inc; 1977-04-18 to 1984-05-03; source msha-controller-operator-history
- **operator_operates_mine:** O'Donnell Coal Company → O'Donnell No 3; 1984-05-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rochester & Pittsburgh Coal Company → O'Donnell No 3; 1984-05-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rochester & Pittsburgh Coal Company → O'Donnell Coal Company; 1984-05-04 to current/open; source msha-controller-operator-history