# Relationship history for MSHA mine 3003284

Current hierarchy: **Philip C Snyder → P W T → P. W. T.**

- 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:** P W T → P. W. T.; 1999-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Philip C Snyder → P. W. T.; 1999-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Philip C Snyder → P W T; 1999-06-01 to current/open; source msha-controller-operator-history