# Relationship history for MSHA mine 1516914

Current hierarchy: **Billy Ray  Dotson → Hustler Coal Company Inc → 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

- **controller_controls_mine:** Woodman Three Mining Inc → No 1; 1974-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Woodman Three Mine Company Inc → No 1; 1990-07-01 to 1991-06-24; source msha-controller-operator-history
- **controller_controls_operator:** Woodman Three Mining Inc → Woodman Three Mine Company Inc; 1990-07-01 to 1991-06-24; source msha-controller-operator-history
- **operator_operates_mine:** Hustler Coal Company Inc → No 1; 1991-06-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Billy Ray  Dotson → No 1; 1991-06-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Billy Ray  Dotson → Hustler Coal Company Inc; 1991-06-25 to current/open; source msha-controller-operator-history