# Relationship history for MSHA mine 3003417

Current hierarchy: **Harry  Wyckoff → WYCKOFF CUSTOM CRUSHING → PORTABLE CRUSHER #3**

- 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:** Harry  Wyckoff → PORTABLE CRUSHER #3; 2001-11-29 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** WYCKOFF CUSTOM CRUSHING → PORTABLE CRUSHER #3; 2002-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harry  Wyckoff → WYCKOFF CUSTOM CRUSHING; 2002-07-10 to current/open; source msha-controller-operator-history