# Relationship history for MSHA mine 0900037

Current hierarchy: **Vulcan Materials Company → Vulcan Construction Materials, L.P. → Bellwood 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) → Bellwood Quarry; 1950-01-01 to 2007-11-15; source msha-controller-operator-history
- **operator_operates_mine:** Hitchcock Corp → Bellwood Quarry; 1950-01-01 to 1979-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Francis  Bourne → Bellwood Quarry; 1950-01-01 to 1979-08-01; source msha-controller-operator-history
- **controller_controls_operator:** Francis  Bourne → Hitchcock Corp; 1950-01-01 to 1979-02-28; source msha-controller-operator-history
- **operator_operates_mine:** C W Matthews Quarries Inc → Bellwood Quarry; 1979-03-01 to 1998-05-01; source msha-controller-operator-history
- **controller_controls_mine:** Robert E  Matthews → Bellwood Quarry; 1979-03-01 to 1998-05-01; source msha-controller-operator-history
- **controller_controls_operator:** Robert E  Matthews → C W Matthews Quarries Inc; 1979-03-01 to 1998-05-01; source msha-controller-operator-history
- **operator_operates_mine:** Vulcan Construction Materials, L.P. → Bellwood Quarry; 1998-05-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Vulcan Construction Materials, L.P.; 1998-05-02 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → Bellwood Quarry; 2007-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → Vulcan Construction Materials, L.P.; 2007-11-16 to current/open; source msha-controller-operator-history