# Relationship history for MSHA mine 1512407

Current hierarchy: **Eldridge Charles & Charles Jr → T & K Coal Company → 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Tex  Eldridge et al → No 1; 1976-10-06 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Poplar Branch Coal Company → No 1; 1980-07-01 to 1982-07-28; source msha-controller-operator-history
- **controller_controls_mine:** Tex  Eldridge et al → No 1; 1980-07-01 to 1983-09-18; source msha-controller-operator-history
- **controller_controls_operator:** Tex  Eldridge et al → Poplar Branch Coal Company; 1980-07-01 to 1982-07-28; source msha-controller-operator-history
- **operator_operates_mine:** Mt Springs Coal Company → No 1; 1982-07-29 to 1982-10-25; source msha-controller-operator-history
- **controller_controls_mine:** Simpson Daniel → No 1; 1982-07-29 to 1982-10-25; source msha-controller-operator-history
- **controller_controls_operator:** Simpson Daniel → Mt Springs Coal Company; 1982-07-29 to 1982-10-25; source msha-controller-operator-history
- **operator_operates_mine:** Poplar Branch Coal Company → No 1; 1982-10-26 to 1983-09-18; source msha-controller-operator-history
- **controller_controls_operator:** Tex  Eldridge et al → Poplar Branch Coal Company; 1982-10-26 to 1983-09-18; source msha-controller-operator-history
- **operator_operates_mine:** R & G Coal Company → No 1; 1983-09-19 to 1984-09-17; source msha-controller-operator-history
- **controller_controls_mine:** Kern Ronnie & Garland Jr → No 1; 1983-09-19 to 1984-09-17; source msha-controller-operator-history
- **controller_controls_operator:** Kern Ronnie & Garland Jr → R & G Coal Company; 1983-09-19 to 1984-09-17; source msha-controller-operator-history
- **operator_operates_mine:** Eldridge Coal Company Inc → No 1; 1984-09-18 to 1985-05-27; source msha-controller-operator-history
- **controller_controls_operator:** Tex  Eldridge et al → Eldridge Coal Company Inc; 1984-09-18 to 1985-05-27; source msha-controller-operator-history
- **operator_operates_mine:** Solar Complex Inc → No 1; 1985-05-28 to 1986-12-07; source msha-controller-operator-history
- **controller_controls_mine:** Tony Carlis  Mahon → No 1; 1985-05-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tony Carlis  Mahon → Solar Complex Inc; 1985-05-28 to 1986-12-07; source msha-controller-operator-history
- **operator_operates_mine:** T & K Coal Company → No 1; 1986-12-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Eldridge Charles & Charles Jr → No 1; 1986-12-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eldridge Charles & Charles Jr → T & K Coal Company; 1986-12-08 to current/open; source msha-controller-operator-history