# Relationship history for MSHA mine 0404933

Current hierarchy: **Sundt Corp → Sundt Corp → Crusher Pit**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Sundt Corp → Crusher Pit; 1985-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sundt Corp → Crusher Pit; 1988-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sundt Corp → Sundt Corp; 1988-04-01 to current/open; source msha-controller-operator-history