# Relationship history for MSHA mine 4402990

Current hierarchy: **Vulcan Materials Company → Vulcan Materials Company → East Stone 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) → East Stone Quarry; 1950-01-01 to 2007-11-15; source msha-controller-operator-history
- **operator_operates_mine:** Marty Corp → East Stone Quarry; 1950-01-01 to 1979-03-05; source msha-controller-operator-history
- **controller_controls_mine:** Marty Corp → East Stone Quarry; 1950-01-01 to 1979-03-05; source msha-controller-operator-history
- **controller_controls_operator:** Marty Corp → Marty Corp; 1950-01-01 to 1979-03-05; source msha-controller-operator-history
- **controller_controls_mine:** John W  Barnette Jr → East Stone Quarry; 1979-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Big Stone Quarry Corp → East Stone Quarry; 1979-03-06 to 1985-01-17; source msha-controller-operator-history
- **controller_controls_mine:** David D  Willis → East Stone Quarry; 1979-03-06 to 1985-01-17; source msha-controller-operator-history
- **controller_controls_operator:** David D  Willis → Big Stone Quarry Corp; 1979-03-06 to 1985-01-17; source msha-controller-operator-history
- **operator_operates_mine:** Rim Rock Quarries Inc → East Stone Quarry; 1985-01-18 to 1990-03-25; source msha-controller-operator-history
- **controller_controls_operator:** John W  Barnette Jr → Rim Rock Quarries Inc; 1985-01-18 to 1990-03-25; source msha-controller-operator-history
- **operator_operates_mine:** Vulcan Materials Company → East Stone Quarry; 1990-03-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Vulcan Materials Company; 1990-03-26 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → East Stone Quarry; 2007-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → Vulcan Materials Company; 2007-11-16 to current/open; source msha-controller-operator-history