# Relationship history for MSHA mine 3605032

Current hierarchy: **Rochester & Pittsburgh Coal Company → O'Donnell Coal Company → O'Donnell No 4**

- 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:** Manor Mines Inc → O'Donnell No 4; 1974-01-01 to 1984-05-03; source msha-controller-operator-history
- **controller_controls_mine:** Global Energy → O'Donnell No 4; 1974-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Global Energy → Manor Mines Inc; 1974-01-01 to 1984-05-03; source msha-controller-operator-history
- **operator_operates_mine:** O'Donnell Coal Company → O'Donnell No 4; 1984-05-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rochester & Pittsburgh Coal Company → O'Donnell No 4; 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