# Relationship history for MSHA mine 1519133

Current hierarchy: **Jeffery Dean  Bowman → Bowman-Cook Construction Co Inc → Glamorgon Mine #1**

- 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:** Jeffery Dean  Bowman → Glamorgon Mine #1; 2007-03-20 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bowman-Cook Construction Co Inc → Glamorgon Mine #1; 2007-07-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffery Dean  Bowman → Bowman-Cook Construction Co Inc; 2007-07-31 to current/open; source msha-controller-operator-history