# Relationship history for MSHA mine 4104921

Current hierarchy: **Edward T  McCain; Jack  Wheeler → Jack L Wheeler Trucking & Equipment, Inc. → Boreg Rock Pitt**

- 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:** Jack L Wheeler Trucking & Equipment Inc → Boreg Rock Pitt; 2012-01-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jack  Wheeler et al → Boreg Rock Pitt; 2012-01-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jack  Wheeler et al → Jack L Wheeler Trucking & Equipment Inc; 2012-01-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edward T  McCain et al → Jack L Wheeler Trucking & Equipment Inc; 2012-01-02 to current/open; source msha-controller-operator-history