# Relationship history for MSHA mine 3607060

Current hierarchy: **Joseph W  Zaprazny → J E Z Inc → Hauto Refuse Bank**

- 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:** J E Z Inc → Hauto Refuse Bank; 1980-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joseph W  Zaprazny → Hauto Refuse Bank; 1980-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph W  Zaprazny → J E Z Inc; 1980-11-01 to current/open; source msha-controller-operator-history