# Relationship history for MSHA mine 1518180

Current hierarchy: **Eddie  Holbrooks → Husky Coal Company Inc → No 10**

- 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 10; 1989-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Donn A  Chickering → No 10; 1997-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Branham & Baker Underground Corp → No 10; 1999-07-01 to 2000-07-30; source msha-controller-operator-history
- **controller_controls_operator:** Donn A  Chickering → Branham & Baker Underground Corp; 1999-07-01 to 2000-07-30; source msha-controller-operator-history
- **operator_operates_mine:** Husky Coal Company Inc → No 10; 2000-07-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eddie  Holbrooks → Husky Coal Company Inc; 2000-07-31 to current/open; source msha-controller-operator-history