# Relationship history for MSHA mine 4609166

Current hierarchy: **R Roger  Baughan; Charles W  Lilly → Thin Seam Systems, Inc. → Four Mile 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:** Thin Seam Systems, Inc. → Four Mile Mine; 2006-06-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Charles W  Lilly et al → Four Mile Mine; 2006-06-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles W  Lilly et al → Thin Seam Systems, Inc.; 2006-06-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** R Roger  Baughan et al → Thin Seam Systems, Inc.; 2006-06-29 to current/open; source msha-controller-operator-history