# Relationship history for MSHA mine 4601954

Current hierarchy: **Bailey Gary & Okey → Jean Coal Company → Jean Mine**

- 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:** Norma Coal Company → Jean Mine; 1950-01-01 to 1976-01-21; source msha-controller-operator-history
- **controller_controls_mine:** Belco Petroleum Corp → Jean Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Belco Petroleum Corp → Norma Coal Company; 1950-01-01 to 1976-01-21; source msha-controller-operator-history
- **operator_operates_mine:** Jean Coal Company → Jean Mine; 1976-01-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bailey Gary & Okey → Jean Mine; 1976-01-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bailey Gary & Okey → Jean Coal Company; 1976-01-22 to current/open; source msha-controller-operator-history