# Relationship history for MSHA mine 1508630

Current hierarchy: **Collins Lonnie R → Bent Mountain Coal Company Inc → No 7 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

- **controller_controls_mine:** Schwab Charles F → No 7 Mine; 1975-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rebel Mining Company → No 7 Mine; 1975-01-01 to 1975-12-10; source msha-controller-operator-history
- **controller_controls_mine:** Wright Allard R & Jesse Potter → No 7 Mine; 1975-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wright Allard R & Jesse Potter → Rebel Mining Company; 1975-01-01 to 1975-12-10; source msha-controller-operator-history
- **operator_operates_mine:** Hawkeye Elkhorn Coal Company Inc → No 7 Mine; 1975-12-11 to 1977-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Schwab Charles F → Hawkeye Elkhorn Coal Company Inc; 1975-12-11 to 1977-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Collins Lonnie R → No 7 Mine; 1976-02-06 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bent Mountain Coal Company Inc → No 7 Mine; 1977-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Collins Lonnie R → Bent Mountain Coal Company Inc; 1977-08-01 to current/open; source msha-controller-operator-history