# Relationship history for MSHA mine 1516424

Current hierarchy: **James River Coal Company → Bell County Coal Corp → Bell County No 1**

- 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

- **controller_controls_mine:** Ball Ralph → Bell County No 1; 1981-06-24 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sterling Energy Inc → Bell County No 1; 1987-09-01 to 1992-10-27; source msha-controller-operator-history
- **controller_controls_operator:** Ball Ralph → Sterling Energy Inc; 1987-09-01 to 1992-10-27; source msha-controller-operator-history
- **controller_controls_mine:** James River Coal Company → Bell County No 1; 1988-09-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bell County Coal Corp → Bell County No 1; 1992-10-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James River Coal Company → Bell County Coal Corp; 1992-10-28 to current/open; source msha-controller-operator-history