# Relationship history for MSHA mine 1505208

Current hierarchy: **James River Coal Company → Mc Coy Elkhorn Coal Corp → Gabriel Valley Load Out**

- 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:** Johns Creek Elkhorn Coal Corp → Gabriel Valley Load Out; 1950-01-01 to 1982-04-29; source msha-controller-operator-history
- **controller_controls_mine:** General Energy Corp → Gabriel Valley Load Out; 1950-01-01 to 1982-04-29; source msha-controller-operator-history
- **controller_controls_operator:** General Energy Corp → Johns Creek Elkhorn Coal Corp; 1950-01-01 to 1982-04-29; source msha-controller-operator-history
- **controller_controls_mine:** Terry Charles  Marshall → Gabriel Valley Load Out; 1981-12-01 to 1988-09-27; source msha-controller-operator-history
- **operator_operates_mine:** Johns Creek Elkhorn Coal Corp → Gabriel Valley Load Out; 1982-04-30 to 1984-03-29; source msha-controller-operator-history
- **controller_controls_mine:** Williams Companies Inc → Gabriel Valley Load Out; 1982-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Williams Companies Inc → Johns Creek Elkhorn Coal Corp; 1982-04-30 to 1984-03-29; source msha-controller-operator-history
- **operator_operates_mine:** Ridgeway Coal Inc → Gabriel Valley Load Out; 1984-03-30 to 1988-09-27; source msha-controller-operator-history
- **controller_controls_operator:** Terry Charles  Marshall → Ridgeway Coal Inc; 1984-03-30 to 1988-09-27; source msha-controller-operator-history
- **operator_operates_mine:** Mc Coy Elkhorn Coal Corp → Gabriel Valley Load Out; 1988-09-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James River Coal Company → Gabriel Valley Load Out; 1988-09-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James River Coal Company → Mc Coy Elkhorn Coal Corp; 1988-09-28 to current/open; source msha-controller-operator-history