# Relationship history for MSHA mine 0404814

Current hierarchy: **Tutor Ronald N → Tutor - Saliba - Perini J/V → Klamath Krusher Portable**

- 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

- **operator_operates_mine:** Tutor - Saliba - Perini J/V → Klamath Krusher Portable; 1986-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tutor Ronald N → Klamath Krusher Portable; 1986-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tutor Ronald N → Tutor - Saliba - Perini J/V; 1986-01-01 to current/open; source msha-controller-operator-history