# Relationship history for MSHA mine 1516667

Current hierarchy: **Yvonne  Yonts → Franklin Collieries Inc → #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

- **operator_operates_mine:** Dave'S Branch Coal Inc → #1; 1989-07-01 to 1990-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Larry  Yonts et al → #1; 1989-07-01 to 1990-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Yonts et al → Dave'S Branch Coal Inc; 1989-07-01 to 1990-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Franklin Collieries Inc → #1; 1990-05-01 to 1992-01-21; source msha-controller-operator-history
- **controller_controls_mine:** Benjamin  Hampton → #1; 1990-05-01 to 1992-01-21; source msha-controller-operator-history
- **controller_controls_operator:** Benjamin  Hampton → Franklin Collieries Inc; 1990-05-01 to 1992-01-21; source msha-controller-operator-history
- **operator_operates_mine:** Franklin Collieries Inc → #1; 1992-01-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Yvonne  Yonts et al → #1; 1992-01-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Yvonne  Yonts et al → Franklin Collieries Inc; 1992-01-22 to current/open; source msha-controller-operator-history