# Relationship history for MSHA mine 4607834

Current hierarchy: **Harry M  Hylton → Patton Inc → Tunnel 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:** Pine Mountain Resources Inc → Tunnel No 1 Mine; 1990-01-01 to 1994-03-20; source msha-controller-operator-history
- **controller_controls_mine:** Allen G  Stump et al → Tunnel No 1 Mine; 1990-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Allen G  Stump et al → Pine Mountain Resources Inc; 1990-01-01 to 1994-03-20; source msha-controller-operator-history
- **operator_operates_mine:** Patton Inc → Tunnel No 1 Mine; 1994-03-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Harry M  Hylton → Tunnel No 1 Mine; 1994-03-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harry M  Hylton → Patton Inc; 1994-03-21 to current/open; source msha-controller-operator-history