# Relationship history for MSHA mine 1515590

Current hierarchy: **Larry  Phillips → Mouthcard Development Company Inc → 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Bartley Marvin → 3; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thornsberry Garry K & George M Smith → 3; 1975-09-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** S & T Coal Company → 3; 1986-04-01 to 1987-08-25; source msha-controller-operator-history
- **controller_controls_operator:** Thornsberry Garry K & George M Smith → S & T Coal Company; 1986-04-01 to 1987-08-25; source msha-controller-operator-history
- **controller_controls_mine:** Larry  Phillips → 3; 1987-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lick Fork Mining Company Inc → 3; 1987-08-26 to 1990-08-19; source msha-controller-operator-history
- **controller_controls_operator:** Bartley Marvin → Lick Fork Mining Company Inc; 1987-08-26 to 1990-08-19; source msha-controller-operator-history
- **controller_controls_mine:** Mims Kenis → 3; 1989-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Coal Bank Resources Inc → 3; 1990-08-20 to 1991-12-02; source msha-controller-operator-history
- **controller_controls_operator:** Mims Kenis → Coal Bank Resources Inc; 1990-08-20 to 1991-12-02; source msha-controller-operator-history
- **operator_operates_mine:** Mouthcard Development Company Inc → 3; 1991-12-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Phillips → Mouthcard Development Company Inc; 1991-12-03 to current/open; source msha-controller-operator-history