# Relationship history for MSHA mine 1700669

Current hierarchy: **Greg  Young → Hayes Enterprises Inc → AUCDIN / PORTABLE PLANT**

- 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

- **operator_operates_mine:** Hayes Enterprises Inc → AUCDIN / PORTABLE PLANT; 1998-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Greg  Young → AUCDIN / PORTABLE PLANT; 1998-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Greg  Young → Hayes Enterprises Inc; 1998-07-01 to current/open; source msha-controller-operator-history