# Relationship history for MSHA mine 3602711

Current hierarchy: **Jones Evan L → Summerhill Coal Company Inc → Summerhill No 1 Strip**

- 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

- **operator_operates_mine:** Joseph Godin Coal Company → Summerhill No 1 Strip; 1950-01-01 to 1976-03-01; source msha-controller-operator-history
- **controller_controls_mine:** Godin Joseph Coal Company → Summerhill No 1 Strip; 1950-01-01 to 1976-03-01; source msha-controller-operator-history
- **controller_controls_operator:** Godin Joseph Coal Company → Joseph Godin Coal Company; 1950-01-01 to 1976-03-01; source msha-controller-operator-history
- **operator_operates_mine:** Summerhill Coal Company Inc → Summerhill No 1 Strip; 1976-03-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jones Evan L → Summerhill No 1 Strip; 1976-03-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jones Evan L → Summerhill Coal Company Inc; 1976-03-02 to current/open; source msha-controller-operator-history