# Relationship history for MSHA mine 1515120

Current hierarchy: **Larry  Yonts; Ray  Slone → Daves Branch Inc → No 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Dave'S Branch Coal Company Inc → No 2; 1985-03-01 to 1985-12-02; source msha-controller-operator-history
- **controller_controls_mine:** Benjamin  Hampton → No 2; 1985-03-01 to 1985-12-02; source msha-controller-operator-history
- **controller_controls_operator:** Benjamin  Hampton → Dave'S Branch Coal Company Inc; 1985-03-01 to 1985-12-02; source msha-controller-operator-history
- **operator_operates_mine:** Double B & F Coal Inc → No 2; 1985-12-03 to 1988-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Clyde  Boyd → No 2; 1985-12-03 to 1988-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Clyde  Boyd → Double B & F Coal Inc; 1985-12-03 to 1988-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Daves Branch Inc → No 2; 1988-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ray  Slone et al → No 2; 1988-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ray  Slone et al → Daves Branch Inc; 1988-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Yonts et al → Daves Branch Inc; 1988-11-01 to current/open; source msha-controller-operator-history