# Relationship history for MSHA mine 0101367

Current hierarchy: **Ceravold Norman → Best Mining Corp → Mine No 1**

- 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:** Valley Mining Corp → Mine No 1; 1975-01-01 to 1976-02-20; source msha-controller-operator-history
- **controller_controls_mine:** Lacey Jerry → Mine No 1; 1975-01-01 to 1976-02-20; source msha-controller-operator-history
- **controller_controls_operator:** Lacey Jerry → Valley Mining Corp; 1975-01-01 to 1976-02-20; source msha-controller-operator-history
- **operator_operates_mine:** Best Mining Corp → Mine No 1; 1976-02-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ceravold Norman → Mine No 1; 1976-02-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ceravold Norman → Best Mining Corp; 1976-02-21 to current/open; source msha-controller-operator-history