# Relationship history for MSHA mine 0102529

Current hierarchy: **Vulcan Materials Company → Vulcan Construction Materials, LP → Atmore Sand and Gravel**

- 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

- **controller_controls_mine:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Atmore Sand and Gravel; 1950-01-01 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Florida Rock Industries Inc → Atmore Sand and Gravel; 1950-01-01 to 2007-11-15; source msha-controller-operator-history
- **operator_operates_mine:** Friese Hauling Inc → Atmore Sand and Gravel; 1983-02-01 to 2005-09-11; source msha-controller-operator-history
- **controller_controls_mine:** William  Mc Leod → Atmore Sand and Gravel; 1983-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William  Mc Leod → Friese Hauling Inc; 1983-02-01 to 2005-09-11; source msha-controller-operator-history
- **operator_operates_mine:** Florida Rock Industries Inc. → Atmore Sand and Gravel; 2005-09-12 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_operator:** Florida Rock Industries Inc → Florida Rock Industries Inc.; 2005-09-12 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → Atmore Sand and Gravel; 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, LP → Atmore Sand and Gravel; 2007-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → Vulcan Construction Materials, LP; 2007-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Vulcan Construction Materials, LP; 2007-11-16 to 2007-11-15; source msha-controller-operator-history