# Relationship history for MSHA mine 0503849

Current hierarchy: **Durango Metals Inc → Rio Corp → Golden Bells**

- 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:** Fatima Minerals Inc → Golden Bells; 1983-04-01 to 1992-01-26; source msha-controller-operator-history
- **controller_controls_mine:** Gondrezick George → Golden Bells; 1983-04-01 to 1992-01-26; source msha-controller-operator-history
- **controller_controls_operator:** Gondrezick George → Fatima Minerals Inc; 1983-04-01 to 1992-01-26; source msha-controller-operator-history
- **operator_operates_mine:** Rio Corp → Golden Bells; 1992-01-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Durango Metals Inc → Golden Bells; 1992-01-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Durango Metals Inc → Rio Corp; 1992-01-27 to current/open; source msha-controller-operator-history