# Relationship history for MSHA mine 0203042

Current hierarchy: **White Mountain Apache Tribe → W.M.A.T. Public Works → W.M.A.T. Public Works**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** W.M.A.T. Public Works → W.M.A.T. Public Works; 2004-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** White Mountain Apache Tribe → W.M.A.T. Public Works; 2004-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** White Mountain Apache Tribe → W.M.A.T. Public Works; 2004-04-13 to current/open; source msha-controller-operator-history