# Relationship history for MSHA mine 3000973

Current hierarchy: **Bernas-Bowdren Holdings Inc → JML QUARRIES INC → JML QUARRIES INC**

- 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:** Sullivan Highway Products Inc → JML QUARRIES INC; 1950-01-01 to 1988-05-08; source msha-controller-operator-history
- **controller_controls_mine:** Standard Industries Ltd → JML QUARRIES INC; 1950-01-01 to 1988-05-08; source msha-controller-operator-history
- **controller_controls_operator:** Standard Industries Ltd → Sullivan Highway Products Inc; 1950-01-01 to 1988-05-08; source msha-controller-operator-history
- **operator_operates_mine:** Sullivan Lafarge → JML QUARRIES INC; 1988-05-09 to 1995-01-24; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge S A → JML QUARRIES INC; 1988-05-09 to 1995-01-24; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Sullivan Lafarge; 1988-05-09 to 1995-01-24; source msha-controller-operator-history
- **controller_controls_mine:** Bernas-Bowdren Holdings Inc → JML QUARRIES INC; 1994-04-22 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** JML Quarries Inc → JML QUARRIES INC; 1995-01-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bernas-Bowdren Holdings Inc → JML Quarries Inc; 1995-01-25 to current/open; source msha-controller-operator-history