# Relationship history for MSHA mine 4605355

Current hierarchy: **Matics James F → Poca River Mining Company Inc → No 1 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Poca River Mining Company → No 1 Mine; 1976-11-10 to 1992-12-29; source msha-controller-operator-history
- **controller_controls_mine:** Thomas J K & E L → No 1 Mine; 1976-11-10 to 1992-12-29; source msha-controller-operator-history
- **controller_controls_operator:** Thomas J K & E L → Poca River Mining Company; 1976-11-10 to 1992-12-29; source msha-controller-operator-history
- **operator_operates_mine:** Poca River Mining Company Inc → No 1 Mine; 1992-12-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Matics James F → No 1 Mine; 1992-12-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matics James F → Poca River Mining Company Inc; 1992-12-30 to current/open; source msha-controller-operator-history