# Relationship history for MSHA mine 1514789

Current hierarchy: **Potter Hersel E → Yogi Mining Company Inc → No 4 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:** Rash Russell → No 4 Mine; 1977-09-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Potter Hersel E → No 4 Mine; 1982-02-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Middle Creek Coal Corp → No 4 Mine; 1984-08-01 to 1986-09-22; source msha-controller-operator-history
- **controller_controls_operator:** Rash Russell → Middle Creek Coal Corp; 1984-08-01 to 1986-09-22; source msha-controller-operator-history
- **operator_operates_mine:** Yogi Mining Company Inc → No 4 Mine; 1986-09-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Potter Hersel E → Yogi Mining Company Inc; 1986-09-23 to current/open; source msha-controller-operator-history