# Relationship history for MSHA mine 0102266

Current hierarchy: **Cook Hal → Hal Cook Enterprises Inc → Casgar Pit**

- 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:** Twc Coal Company → Casgar Pit; 1980-12-01 to 1981-05-03; source msha-controller-operator-history
- **controller_controls_mine:** Casgar Thomas W → Casgar Pit; 1980-12-01 to 1981-05-03; source msha-controller-operator-history
- **controller_controls_operator:** Casgar Thomas W → Twc Coal Company; 1980-12-01 to 1981-05-03; source msha-controller-operator-history
- **controller_controls_mine:** Cook Hal → Casgar Pit; 1981-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hal Cook Enterprises Inc → Casgar Pit; 1981-05-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cook Hal → Hal Cook Enterprises Inc; 1981-05-04 to current/open; source msha-controller-operator-history