# Relationship history for MSHA mine 4407203

Current hierarchy: **David  Powers → MATTIEBOO, LLC → MATTIEBOO #4 Surface**

- 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:** David  Powers → MATTIEBOO #4 Surface; 2004-09-29 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** MATTIEBOO, LLC → MATTIEBOO #4 Surface; 2007-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Powers → MATTIEBOO, LLC; 2007-04-18 to current/open; source msha-controller-operator-history