# Relationship history for MSHA mine 0101015

Current hierarchy: **Alon  Ballenger → Royal Coal Co → Royal 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:** Royal Coal Company → Royal Mine; 1950-01-01 to 1975-10-19; source msha-controller-operator-history
- **controller_controls_mine:** Benefield Charles R → Royal Mine; 1950-01-01 to 1975-10-19; source msha-controller-operator-history
- **controller_controls_operator:** Benefield Charles R → Royal Coal Company; 1950-01-01 to 1975-10-19; source msha-controller-operator-history
- **operator_operates_mine:** Royal Coal Co → Royal Mine; 1975-10-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alon  Ballenger → Royal Mine; 1975-10-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alon  Ballenger → Royal Coal Co; 1975-10-20 to current/open; source msha-controller-operator-history