# Relationship history for MSHA mine 4503385

Current hierarchy: **Sharel  Dungey → D-4 Care Inc → GRANDRIDGE**

- 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:** D-4 Care Inc → GRANDRIDGE; 1999-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sharel  Dungey  et al → GRANDRIDGE; 1999-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sharel  Dungey  et al → D-4 Care Inc; 1999-02-01 to current/open; source msha-controller-operator-history