# Relationship history for MSHA mine 0404510

Current hierarchy: **Thomas Alice → Thomas Mining → Oro 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:** El Oro Mines Ltd → Oro Mine; 1981-05-01 to 1988-03-03; source msha-controller-operator-history
- **controller_controls_mine:** Zilka Bill → Oro Mine; 1981-05-01 to 1988-03-03; source msha-controller-operator-history
- **controller_controls_operator:** Zilka Bill → El Oro Mines Ltd; 1981-05-01 to 1988-03-03; source msha-controller-operator-history
- **operator_operates_mine:** Thomas Mining → Oro Mine; 1988-03-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thomas Alice → Oro Mine; 1988-03-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas Alice → Thomas Mining; 1988-03-04 to current/open; source msha-controller-operator-history