# Relationship history for MSHA mine 1501968

Current hierarchy: **Cyprus Amax Minerals Company → Bailey Hill Mining Company → No 2 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:** Kentucky East Corp → No 2 Mine; 1950-01-01 to 1973-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Kentucky East Corp → No 2 Mine; 1950-01-01 to 1973-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Kentucky East Corp → Kentucky East Corp; 1950-01-01 to 1973-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Bailey Hill Mining Corp → No 2 Mine; 1973-08-01 to 1981-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Mountain Coals Inc → No 2 Mine; 1973-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mountain Coals Inc → Bailey Hill Mining Corp; 1973-08-01 to 1981-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Bailey Hill Mining Company → No 2 Mine; 1981-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cyprus Amax Minerals Company → No 2 Mine; 1981-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cyprus Amax Minerals Company → Bailey Hill Mining Company; 1981-09-01 to current/open; source msha-controller-operator-history