# Relationship history for MSHA mine 4400118

Current hierarchy: **Vulcan Materials Company → Vulcan Construction Materials, LLC → SANDERS**

- 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) → SANDERS; 1950-01-01 to 2007-11-15; source msha-controller-operator-history
- **operator_operates_mine:** Sanders Quarry Inc → SANDERS; 1950-01-01 to 1987-10-30; source msha-controller-operator-history
- **controller_controls_mine:** W W  Sanders Jr → SANDERS; 1950-01-01 to 1987-10-30; source msha-controller-operator-history
- **controller_controls_operator:** W W  Sanders Jr → Sanders Quarry Inc; 1950-01-01 to 1987-10-30; source msha-controller-operator-history
- **operator_operates_mine:** Vulcan Construction Materials, LLC → SANDERS; 1987-10-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Vulcan Construction Materials, LLC; 1987-10-31 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → SANDERS; 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