# Relationship history for MSHA mine 0301140

Current hierarchy: **Vulcan Materials Company → Vulcan Construction Materials, LLC → Searcy 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:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Searcy Quarry; 1950-01-01 to 2007-11-15; source msha-controller-operator-history
- **operator_operates_mine:** St Francis Material Company → Searcy Quarry; 1950-01-01 to 1985-03-26; source msha-controller-operator-history
- **controller_controls_mine:** Ben M Hogan Company Inc → Searcy 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 1985-03-26; source msha-controller-operator-history
- **controller_controls_mine:** Bill L  Johnston → Searcy Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Searcy Asphalt & Materials Inc → Searcy Quarry; 1985-03-27 to 1998-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Howard L  House → Searcy Quarry; 1985-03-27 to 1998-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Howard L  House → Searcy Asphalt & Materials Inc; 1985-03-27 to 1998-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Rock Products Inc → Searcy Quarry; 1998-05-01 to 1999-02-07; source msha-controller-operator-history
- **controller_controls_operator:** Bill L  Johnston → Rock Products Inc; 1998-05-01 to 1999-02-07; source msha-controller-operator-history
- **operator_operates_mine:** Vulcan Construction Materials, LLC → Searcy Quarry; 1999-02-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Vulcan Construction Materials, LLC; 1999-02-08 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → Searcy Quarry; 2007-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → Vulcan Construction Materials, LLC; 2007-11-16 to current/open; source msha-controller-operator-history