# Relationship history for MSHA mine 1002149

Current hierarchy: **Brian L  Wood → Wood's Crushing & Hauling, Inc. → Crusher #4**

- 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:** Brian L  Wood → Crusher #4; 1984-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wood's Crushing & Hauling, Inc. → Crusher #4; 2008-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian L  Wood → Wood's Crushing & Hauling, Inc.; 2008-01-01 to current/open; source msha-controller-operator-history