# Relationship history for MSHA mine 1302415

Current hierarchy: **Matthew Paul  Horsfield → Horsfield Materials, Inc. → Cascade-Locher 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

- **operator_operates_mine:** Horsfield Materials, Inc. → Cascade-Locher Pit; 2010-04-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Matthew Paul  Horsfield → Cascade-Locher Pit; 2010-04-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matthew Paul  Horsfield → Horsfield Materials, Inc.; 2010-04-23 to current/open; source msha-controller-operator-history