# Relationship history for MSHA mine 1516974

Current hierarchy: **Eddie  Holbrooks → Husky Coal Company Inc → No 12**

- 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

- **controller_controls_mine:** Eddie  Holbrooks → No 12; 1989-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Williams Eugene → No 12; 1990-04-18 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wilcoal Mining Inc → No 12; 1990-09-01 to 1991-06-13; source msha-controller-operator-history
- **controller_controls_operator:** Williams Eugene → Wilcoal Mining Inc; 1990-09-01 to 1991-06-13; source msha-controller-operator-history
- **operator_operates_mine:** Humming Bird Services Inc → No 12; 1991-06-14 to 2001-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Ronnie A  Edwards → No 12; 1991-06-14 to 2001-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Ronnie A  Edwards → Humming Bird Services Inc; 1991-06-14 to 2001-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Husky Coal Company Inc → No 12; 2001-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eddie  Holbrooks → Husky Coal Company Inc; 2001-05-01 to current/open; source msha-controller-operator-history