# Relationship history for MSHA mine 3800641

Current hierarchy: **Real Del Monte Mining Corp → Nevada Goldfields Inc → BARITE HILL**

- 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

- **controller_controls_mine:** Real Del Monte Mining Corp → BARITE HILL; 1986-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Gwalia (Usa) Ltd → BARITE HILL; 1989-12-01 to 1991-11-17; source msha-controller-operator-history
- **controller_controls_mine:** Gwalia Consolidated Ltd → BARITE HILL; 1989-12-01 to 1991-11-17; source msha-controller-operator-history
- **controller_controls_operator:** Gwalia Consolidated Ltd → Gwalia (Usa) Ltd; 1989-12-01 to 1991-11-17; source msha-controller-operator-history
- **operator_operates_mine:** Nevada Goldfields Inc → BARITE HILL; 1991-11-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Real Del Monte Mining Corp → Nevada Goldfields Inc; 1991-11-18 to current/open; source msha-controller-operator-history