# Relationship history for MSHA mine 0301802

Current hierarchy: **Kevin  Glassel → Arkansas Rock Products → ARKANSAS ROCK PRODUCTS**

- 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

- **operator_operates_mine:** Arkansas Rock Products → ARKANSAS ROCK PRODUCTS; 1998-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kevin  Glassel → ARKANSAS ROCK PRODUCTS; 1998-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kevin  Glassel → Arkansas Rock Products; 1998-10-01 to current/open; source msha-controller-operator-history