# Relationship history for MSHA mine 1201818

Current hierarchy: **Reeves Harold → Eureka Mining Corp → Liberal 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:** Eureka Mining Corp → Liberal Mine; 1980-11-01 to 1984-08-30; source msha-controller-operator-history
- **controller_controls_mine:** Coleman Denzil → Liberal Mine; 1980-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Coleman Denzil → Eureka Mining Corp; 1980-11-01 to 1984-08-30; source msha-controller-operator-history
- **operator_operates_mine:** Eureka Mining Corp → Liberal Mine; 1984-08-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Reeves Harold → Liberal Mine; 1984-08-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Reeves Harold → Eureka Mining Corp; 1984-08-31 to current/open; source msha-controller-operator-history