# Relationship history for MSHA mine 0100017

Current hierarchy: **Bailey Jack A Sr → Bailey'S Construction Company Inc → ST. STEPHENS 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:** Lone Star Industries Inc → ST. STEPHENS QUARRY; 1950-01-01 to 1991-06-25; source msha-controller-operator-history
- **controller_controls_mine:** Lone Star Industries Inc → ST. STEPHENS QUARRY; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lone Star Industries Inc → Lone Star Industries Inc; 1950-01-01 to 1991-06-25; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge S A → ST. STEPHENS QUARRY; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bailey Jack A Sr → ST. STEPHENS QUARRY; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lafarge Corp → ST. STEPHENS QUARRY; 1991-06-26 to 1991-12-15; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Lafarge Corp; 1991-06-26 to 1991-12-15; source msha-controller-operator-history
- **operator_operates_mine:** Bailey'S Construction Company Inc → ST. STEPHENS QUARRY; 1991-12-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bailey Jack A Sr → Bailey'S Construction Company Inc; 1991-12-16 to current/open; source msha-controller-operator-history