# Relationship history for MSHA mine 1515775

Current hierarchy: **Larry  Yonts; Ray  Slone → Topkite Coal Inc → #2**

- 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:** Hall Clemit → #2; 1986-05-23 to 1987-08-24; source msha-controller-operator-history
- **operator_operates_mine:** Old Man Mining Company Inc → #2; 1986-10-01 to 1987-01-07; source msha-controller-operator-history
- **controller_controls_mine:** Turner Doug → #2; 1986-10-01 to 1987-01-07; source msha-controller-operator-history
- **controller_controls_operator:** Turner Doug → Old Man Mining Company Inc; 1986-10-01 to 1987-01-07; source msha-controller-operator-history
- **operator_operates_mine:** Tabco Coal Company Inc → #2; 1987-01-08 to 1987-08-24; source msha-controller-operator-history
- **controller_controls_operator:** Hall Clemit → Tabco Coal Company Inc; 1987-01-08 to 1987-08-24; source msha-controller-operator-history
- **operator_operates_mine:** Topkite Coal Inc → #2; 1987-08-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ray  Slone et al → #2; 1987-08-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ray  Slone et al → Topkite Coal Inc; 1987-08-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Yonts et al → Topkite Coal Inc; 1987-08-25 to current/open; source msha-controller-operator-history