# Relationship history for MSHA mine 1512027

Current hierarchy: **Jamestown Resources Inc → Jamie Coal Company Inc → No 3 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:** Jamie Coal Company Inc → No 3 Mine; 1979-08-01 to 1981-11-08; source msha-controller-operator-history
- **controller_controls_mine:** Patrick James → No 3 Mine; 1979-08-01 to 1981-11-08; source msha-controller-operator-history
- **controller_controls_operator:** Patrick James → Jamie Coal Company Inc; 1979-08-01 to 1981-11-08; source msha-controller-operator-history
- **operator_operates_mine:** Jamie Coal Company Inc → No 3 Mine; 1981-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jamestown Resources Inc → No 3 Mine; 1981-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jamestown Resources Inc → Jamie Coal Company Inc; 1981-11-09 to current/open; source msha-controller-operator-history