# Relationship history for MSHA mine 1517637

Current hierarchy: **Larry  Yonts; Ray  Slone → Daves Branch Inc → #5**

- 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:** Ray  Slone et al → #5; 1988-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Florida Progress Corporation → #5; 1989-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kentucky May Coal Company Inc → #5; 1995-01-01 to 1995-08-09; source msha-controller-operator-history
- **controller_controls_operator:** Florida Progress Corporation → Kentucky May Coal Company Inc; 1995-01-01 to 1995-08-09; source msha-controller-operator-history
- **operator_operates_mine:** Daves Branch Inc → #5; 1995-08-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ray  Slone et al → Daves Branch Inc; 1995-08-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Yonts et al → Daves Branch Inc; 1995-08-10 to current/open; source msha-controller-operator-history