# Relationship history for MSHA mine 0100004

Current hierarchy: **Lhoist Group → Martin Marietta, LLC → Brierfield 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:** Dolime Minerals Company → Brierfield Quarry; 1950-01-01 to 1984-04-24; source msha-controller-operator-history
- **controller_controls_mine:** American Resources Inc → Brierfield Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** American Resources Inc → Dolime Minerals Company; 1950-01-01 to 1984-04-24; source msha-controller-operator-history
- **operator_operates_mine:** Mag-Stone Inc → Brierfield Quarry; 1984-04-25 to 1986-04-15; source msha-controller-operator-history
- **controller_controls_mine:** Naish James L → Brierfield Quarry; 1984-04-25 to 1986-04-15; source msha-controller-operator-history
- **controller_controls_operator:** Naish James L → Mag-Stone Inc; 1984-04-25 to 1986-04-15; source msha-controller-operator-history
- **operator_operates_mine:** Dolime Minerals Company → Brierfield Quarry; 1986-04-16 to 2000-06-13; source msha-controller-operator-history
- **controller_controls_operator:** American Resources Inc → Dolime Minerals Company; 1986-04-16 to 2000-06-13; source msha-controller-operator-history
- **controller_controls_mine:** Chemical Lime Company → Brierfield Quarry; 1989-07-01 to 1998-12-30; source msha-controller-operator-history
- **controller_controls_mine:** Lhoist Group → Brierfield Quarry; 1998-12-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lhoist North America of Alabama, LLC → Brierfield Quarry; 2000-06-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lhoist Group → Lhoist North America of Alabama, LLC; 2000-06-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chemical Lime Company → Lhoist North America of Alabama, LLC; 2000-06-14 to 1998-12-30; source msha-controller-operator-history