# Relationship history for MSHA mine 4407158

Current hierarchy: **Craig A  Beck; (Landon) Keller  Smith → Glamorgan Properties LLC → Endurance Mine**

- 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:** Glamorgan Properties LLC → Endurance Mine; 2005-12-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** (Landon) Keller  Smith et al → Endurance Mine; 2005-12-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** (Landon) Keller  Smith et al → Glamorgan Properties LLC; 2005-12-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Craig A  Beck et al → Glamorgan Properties LLC; 2005-12-16 to current/open; source msha-controller-operator-history