# Relationship history for MSHA mine 3606743

Current hierarchy: **Larry  Gordon → Churchill Coal Corp → Trevorton Plant**

- 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:** Larry  Gordon → Trevorton Plant; 1977-12-14 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Churchill Coal Corp → Trevorton Plant; 1978-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Gordon → Churchill Coal Corp; 1978-10-01 to current/open; source msha-controller-operator-history