# Relationship history for MSHA mine 4604725

Current hierarchy: **Campbell A D → Indian Creek Coal Company → 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

- **operator_operates_mine:** J L S Coal Corp → No 3 Mine; 1975-08-01 to 1976-02-13; source msha-controller-operator-history
- **controller_controls_mine:** Mc Kinney Charles W → No 3 Mine; 1975-08-01 to 1981-06-15; source msha-controller-operator-history
- **controller_controls_operator:** Mc Kinney Charles W → J L S Coal Corp; 1975-08-01 to 1976-02-13; source msha-controller-operator-history
- **operator_operates_mine:** Indian Creek Coal Company → No 3 Mine; 1976-02-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Campbell A D → No 3 Mine; 1976-02-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Campbell A D → Indian Creek Coal Company; 1976-02-14 to current/open; source msha-controller-operator-history