# Relationship history for MSHA mine 0404755

Current hierarchy: **Aloisi Fred → Jefferson State Exploration & Development Co → Tangle Blue**

- 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:** Jefferson State Exploration & Development Co → Tangle Blue; 1985-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Aloisi Fred → Tangle Blue; 1985-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Aloisi Fred → Jefferson State Exploration & Development Co; 1985-07-01 to current/open; source msha-controller-operator-history