# Relationship history for MSHA mine 3303392

Current hierarchy: **Schiappa Dan → Energy International Inc → No 58 Strip**

- 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:** Energy International Inc → No 58 Strip; 1975-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Schiappa Dan → No 58 Strip; 1975-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Schiappa Dan → Energy International Inc; 1975-06-01 to current/open; source msha-controller-operator-history