# Relationship history for MSHA mine 4406424

Current hierarchy: **Vulcan Materials Company → Vulcan Construction Materials, LLC → Sandy Point Plant**

- 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) → Sandy Point Plant; 1950-01-01 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Florida Rock Industries Inc → Sandy Point Plant; 1950-01-01 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Lone Star Industries Inc & Tarmac Plc → Sandy Point Plant; 1987-01-01 to 1988-12-18; source msha-controller-operator-history
- **operator_operates_mine:** Chisman Company Inc → Sandy Point Plant; 1987-10-01 to 1987-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Chisman J W Whiting → Sandy Point Plant; 1987-10-01 to 1987-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Chisman J W Whiting → Chisman Company Inc; 1987-10-01 to 1987-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Tarmac-Lonestar Inc → Sandy Point Plant; 1988-01-01 to 1988-12-18; source msha-controller-operator-history
- **controller_controls_operator:** Lone Star Industries Inc & Tarmac Plc → Tarmac-Lonestar Inc; 1988-01-01 to 1988-12-18; source msha-controller-operator-history
- **operator_operates_mine:** Tarmac Virginia Inc → Sandy Point Plant; 1988-12-19 to 2001-11-14; source msha-controller-operator-history
- **controller_controls_mine:** Tarmac Plc → Sandy Point Plant; 1988-12-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tarmac Plc → Tarmac Virginia Inc; 1988-12-19 to 2001-11-14; source msha-controller-operator-history
- **operator_operates_mine:** Florida Rock Industries Inc. → Sandy Point Plant; 2001-11-15 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_operator:** Florida Rock Industries Inc → Florida Rock Industries Inc.; 2001-11-15 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → Sandy Point Plant; 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 → Sandy Point Plant; 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