# Relationship history for MSHA mine 1514795

Current hierarchy: **Burke John Jr → Emmanuel Coal Company Inc → No 1**

- 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:** Jackson Harold → No 1; 1984-01-04 to 1986-06-02; source msha-controller-operator-history
- **operator_operates_mine:** Pyramid Mining Inc → No 1; 1984-08-01 to 1986-06-02; source msha-controller-operator-history
- **controller_controls_operator:** Jackson Harold → Pyramid Mining Inc; 1984-08-01 to 1986-06-02; source msha-controller-operator-history
- **operator_operates_mine:** Emmanuel Coal Company Inc → No 1; 1986-06-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Burke John Jr → No 1; 1986-06-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Burke John Jr → Emmanuel Coal Company Inc; 1986-06-03 to current/open; source msha-controller-operator-history