# Relationship history for MSHA mine 1200139

Current hierarchy: **Rogers Group Inc → Rogers Group Inc → Owen Valley Quarry**

- 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:** Rogers Group Inc → Owen Valley Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Clayton Winders & Sons → Owen Valley Quarry; 1950-01-01 to 1984-01-11; source msha-controller-operator-history
- **controller_controls_mine:** Charles D  Winders et al → Owen Valley Quarry; 1950-01-01 to 1984-01-11; source msha-controller-operator-history
- **controller_controls_operator:** Charles D  Winders et al → Clayton Winders & Sons; 1950-01-01 to 1984-01-11; source msha-controller-operator-history
- **operator_operates_mine:** Winders Crushed Stone → Owen Valley Quarry; 1984-01-12 to 1990-09-14; source msha-controller-operator-history
- **controller_controls_mine:** Robert K  Winders → Owen Valley Quarry; 1984-01-12 to 1990-09-14; source msha-controller-operator-history
- **controller_controls_operator:** Robert K  Winders → Winders Crushed Stone; 1984-01-12 to 1990-09-14; source msha-controller-operator-history
- **operator_operates_mine:** Rogers Group Inc → Owen Valley Quarry; 1990-09-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rogers Group Inc → Rogers Group Inc; 1990-09-15 to current/open; source msha-controller-operator-history