# Relationship history for MSHA mine 4404231

Current hierarchy: **Blankenship Virgus → Tri-Star Mining Company Inc → No 3**

- 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:** Elswick Fork Coal Company Inc → No 3; 1975-11-11 to 1976-09-22; source msha-controller-operator-history
- **controller_controls_mine:** Preece Cecil H → No 3; 1975-11-11 to 1976-09-22; source msha-controller-operator-history
- **controller_controls_operator:** Preece Cecil H → Elswick Fork Coal Company Inc; 1975-11-11 to 1976-09-22; source msha-controller-operator-history
- **operator_operates_mine:** Elswick Fork Coal Company Inc → No 3; 1976-09-23 to 1976-12-27; source msha-controller-operator-history
- **controller_controls_mine:** Fletcher Charles → No 3; 1976-09-23 to 1976-12-27; source msha-controller-operator-history
- **controller_controls_operator:** Fletcher Charles → Elswick Fork Coal Company Inc; 1976-09-23 to 1976-12-27; source msha-controller-operator-history
- **operator_operates_mine:** Elswick Fork Coal Company Inc → No 3; 1976-12-28 to 1980-02-11; source msha-controller-operator-history
- **controller_controls_mine:** Corbett William P → No 3; 1976-12-28 to 1980-02-11; source msha-controller-operator-history
- **controller_controls_operator:** Corbett William P → Elswick Fork Coal Company Inc; 1976-12-28 to 1980-02-11; source msha-controller-operator-history
- **controller_controls_mine:** Blankenship Virgus → No 3; 1977-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tri-Star Mining Company Inc → No 3; 1980-02-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Blankenship Virgus → Tri-Star Mining Company Inc; 1980-02-12 to current/open; source msha-controller-operator-history