# Relationship history for MSHA mine 1518752

Current hierarchy: **Vulcan Materials Company → Vulcan Construction Materials, LLC → Lake City 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) → Lake City Quarry; 1950-01-01 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Florida Rock Industries Inc → Lake City Quarry; 1950-01-01 to 2007-11-15; source msha-controller-operator-history
- **operator_operates_mine:** John Henry Quarries, LLC → Lake City Quarry; 2004-05-01 to 2005-12-29; source msha-controller-operator-history
- **controller_controls_mine:** Fred W  Banks et al → Lake City Quarry; 2004-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fred W  Banks et al → John Henry Quarries, LLC; 2004-05-01 to 2005-12-29; source msha-controller-operator-history
- **controller_controls_operator:** Damian T  Cristiani et al → John Henry Quarries, LLC; 2004-05-01 to 2005-12-29; source msha-controller-operator-history
- **operator_operates_mine:** Florida Rock Industries Inc → Lake City Quarry; 2005-12-30 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_operator:** Florida Rock Industries Inc → Florida Rock Industries Inc; 2005-12-30 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → Lake City Quarry; 2007-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → Florida Rock Industries Inc; 2007-11-16 to 2007-11-15; source msha-controller-operator-history
- **operator_operates_mine:** Vulcan Construction Materials, LLC → Lake City 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
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Vulcan Construction Materials, LLC; 2007-11-16 to 2007-11-15; source msha-controller-operator-history