# Relationship history for MSHA mine 4405263

Current hierarchy: **Justus John Henry → E & M 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Pruitt Danny E → No 3 Mine; 1975-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Black Hawk Coal Company Inc → No 3 Mine; 1979-08-01 to 1980-01-17; source msha-controller-operator-history
- **controller_controls_operator:** Pruitt Danny E → Black Hawk Coal Company Inc; 1979-08-01 to 1980-01-17; source msha-controller-operator-history
- **controller_controls_mine:** Justus John Henry → No 3 Mine; 1979-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** E & M Coal Company Inc → No 3 Mine; 1980-01-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Justus John Henry → E & M Coal Company Inc; 1980-01-18 to current/open; source msha-controller-operator-history