# Relationship history for MSHA mine 2003251

Current hierarchy: **Patrick L  Moyle → Ishpeming Concrete Inc. → WASH PLANT**

- 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:** Ishpeming Concrete Inc. → WASH PLANT; 2002-08-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Patrick L  Moyle et al → WASH PLANT; 2002-08-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patrick L  Moyle et al → Ishpeming Concrete Inc.; 2002-08-05 to current/open; source msha-controller-operator-history