# Relationship history for MSHA mine 0404737

Current hierarchy: **Du Shane Kirk L → Keystone Mining Company → Owens Lake Gold**

- 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:** Du Shane Kirk L Et Al → Owens Lake Gold; 1980-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Keystone Mining Company → Owens Lake Gold; 1985-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Du Shane Kirk L Et Al → Keystone Mining Company; 1985-04-01 to current/open; source msha-controller-operator-history