# Relationship history for MSHA mine 3304378

Current hierarchy: **Dean  Wikel → Erie Blacktop Inc → BAYCLIFFS SUBDIVISION**

- 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:** Erie Blacktop Inc → BAYCLIFFS SUBDIVISION; 1996-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dean  Wikel → BAYCLIFFS SUBDIVISION; 1996-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dean  Wikel → Erie Blacktop Inc; 1996-07-01 to current/open; source msha-controller-operator-history