# Relationship history for MSHA mine 3604109

Current hierarchy: **Ambrosia Rose → The Ambrosia Coal & Construction Co. → Ambrosia Tipple**

- 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

- **operator_operates_mine:** Ambrosia Coal & Construction Company → Ambrosia Tipple; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ambrosia Rose → Ambrosia Tipple; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ambrosia Rose → Ambrosia Coal & Construction Company; 1950-01-01 to current/open; source msha-controller-operator-history