# Relationship history for MSHA mine 4002788

Current hierarchy: **Crisp William & Roger Meeks → Midnight Coal Company → 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Midnight Coal Company → No 1; 1982-04-01 to 1988-05-16; source msha-controller-operator-history
- **controller_controls_mine:** Layne Loys → No 1; 1982-04-01 to 1988-05-16; source msha-controller-operator-history
- **controller_controls_operator:** Layne Loys → Midnight Coal Company; 1982-04-01 to 1988-05-16; source msha-controller-operator-history
- **operator_operates_mine:** Midnight Coal Company → No 1; 1988-05-17 to 1988-11-01; source msha-controller-operator-history
- **controller_controls_mine:** Kilgore Billy J & James W Miller → No 1; 1988-05-17 to 1988-11-01; source msha-controller-operator-history
- **controller_controls_operator:** Kilgore Billy J & James W Miller → Midnight Coal Company; 1988-05-17 to 1988-11-01; source msha-controller-operator-history
- **operator_operates_mine:** Midnight Coal Company → No 1; 1988-11-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Crisp William & Roger Meeks → No 1; 1988-11-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Crisp William & Roger Meeks → Midnight Coal Company; 1988-11-02 to current/open; source msha-controller-operator-history