# Relationship history for MSHA mine 3200922

Current hierarchy: **Matthew Ward  Hanna → Pinnacle Materials, Inc. → Arnold Pit**

- 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

- **controller_controls_mine:** Matthew Ward  Hanna → Arnold Pit; 2010-08-04 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pinnacle Materials, Inc. → Arnold Pit; 2011-10-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matthew Ward  Hanna → Pinnacle Materials, Inc.; 2011-10-24 to current/open; source msha-controller-operator-history