# Relationship history for MSHA mine 2200789

Current hierarchy: **Margie B  Carwyle → Carwyle Dozer Service, Inc. → Carwyle Dozer Service, Inc.**

- 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:** Carwyle Dozer Service Inc → Carwyle Dozer Service, Inc.; 2008-12-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Margie B  Carwyle → Carwyle Dozer Service, Inc.; 2008-12-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Margie B  Carwyle → Carwyle Dozer Service Inc; 2008-12-03 to current/open; source msha-controller-operator-history