# Relationship history for MSHA mine 3605987

Current hierarchy: **Mashuda Corp → Mars Mining Company → Mars 22**

- 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:** Mashuda Corp → Mars 22; 1975-08-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mars Mining Company → Mars 22; 1976-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mashuda Corp → Mars Mining Company; 1976-01-01 to current/open; source msha-controller-operator-history