# Relationship history for MSHA mine 2003597

Current hierarchy: **Joseph A  Haddix → Haddix Sand & Gravel LLC → Haddix Sand & Gravel LLC**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Haddix Sand & Gravel LLC → Haddix Sand & Gravel LLC; 2020-05-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joseph A  Haddix → Haddix Sand & Gravel LLC; 2020-05-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph A  Haddix → Haddix Sand & Gravel LLC; 2020-05-11 to current/open; source msha-controller-operator-history