# Relationship history for MSHA mine 4403567

Current hierarchy: **Ashland Inc → Apac-Virginia Inc → Staunton River Sand Pit**

- 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:** Ashland Inc → Staunton River Sand Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mc Carty Sand Company → Staunton River Sand Pit; 1950-01-01 to 1988-03-09; source msha-controller-operator-history
- **controller_controls_mine:** Leroy I  McCarty → Staunton River Sand Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Leroy I  McCarty → Mc Carty Sand Company; 1950-01-01 to 1988-03-09; source msha-controller-operator-history
- **operator_operates_mine:** Apac-Virginia Inc → Staunton River Sand Pit; 1988-03-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → Apac-Virginia Inc; 1988-03-10 to current/open; source msha-controller-operator-history