# Relationship history for MSHA mine 4404285

Current hierarchy: **Craig A  Beck; (Landon) Keller  Smith → Glamorgan Processing, LLC. → Glamorgan Complex**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Glamorgan Coal Company → Glamorgan Complex; 1976-01-01 to 2003-08-13; source msha-controller-operator-history
- **controller_controls_mine:** Amvest Corporation → Glamorgan Complex; 1976-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amvest Corporation → Glamorgan Coal Company; 1976-01-01 to 2003-08-13; source msha-controller-operator-history
- **operator_operates_mine:** Donna B Processing Inc → Glamorgan Complex; 2003-08-14 to 2005-03-10; source msha-controller-operator-history
- **controller_controls_mine:** Joe Douglas  Kilgore → Glamorgan Complex; 2003-08-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joe Douglas  Kilgore → Donna B Processing Inc; 2003-08-14 to 2005-03-10; source msha-controller-operator-history
- **operator_operates_mine:** Glamorgan Processing, LLC. → Glamorgan Complex; 2005-03-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** (Landon) Keller  Smith et al → Glamorgan Complex; 2005-03-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** (Landon) Keller  Smith et al → Glamorgan Processing, LLC.; 2005-03-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Craig A  Beck et al → Glamorgan Processing, LLC.; 2005-03-11 to current/open; source msha-controller-operator-history