# Relationship history for MSHA mine 1500106

Current hierarchy: **Vulcan Materials Company → Vulcan Construction Materials, L.P. → Georgetown Road 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Vulcan Materials Company → Georgetown Road Quarry; 1950-01-01 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Georgetown Road Quarry; 1950-01-01 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Vulcan Materials Company; 1950-01-01 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → Georgetown Road Quarry; 2007-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → Vulcan Materials Company; 2007-11-16 to 2007-11-15; source msha-controller-operator-history
- **operator_operates_mine:** Vulcan Construction Materials, L.P. → Georgetown Road 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
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Vulcan Construction Materials, L.P.; 2007-11-16 to 2007-11-15; source msha-controller-operator-history