# Relationship history for MSHA mine 0300414

Current hierarchy: **Jones Robert H → M & T Paving & Construction Company Inc → ST. FRANCIS MATERIAL 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

- **operator_operates_mine:** St Francis Material Company → ST. FRANCIS MATERIAL QUARRY; 1950-01-01 to 1995-03-14; source msha-controller-operator-history
- **controller_controls_mine:** Ben M Hogan Company Inc → ST. FRANCIS MATERIAL QUARRY; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ben M Hogan Company Inc → St Francis Material Company; 1950-01-01 to 1995-03-14; source msha-controller-operator-history
- **operator_operates_mine:** M & T Paving & Construction Company Inc → ST. FRANCIS MATERIAL QUARRY; 1995-03-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jones Robert H → ST. FRANCIS MATERIAL QUARRY; 1995-03-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jones Robert H → M & T Paving & Construction Company Inc; 1995-03-15 to current/open; source msha-controller-operator-history