# Relationship history for MSHA mine 1302065

Current hierarchy: **Robert B  Holesinger → Quality Concrete Co. → Gateway Sand & 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) → Gateway Sand & Gravel; 1950-01-01 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** B L Anderson Inc → Gateway Sand & Gravel; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B L Anderson Inc → Gateway Sand & Gravel; 1985-06-01 to 1988-05-31; source msha-controller-operator-history
- **controller_controls_operator:** B L Anderson Inc → B L Anderson Inc; 1985-06-01 to 1988-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Vulcan Materials Company → Gateway Sand & Gravel; 1988-06-01 to 1992-05-11; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Vulcan Materials Company; 1988-06-01 to 1992-05-11; source msha-controller-operator-history
- **operator_operates_mine:** Quality Concrete Company → Gateway Sand & Gravel; 1992-05-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert B  Holesinger → Gateway Sand & Gravel; 1992-05-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert B  Holesinger → Quality Concrete Company; 1992-05-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → Gateway Sand & Gravel; 2007-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → Vulcan Materials Company; 2007-11-16 to 1992-05-11; source msha-controller-operator-history