# Relationship history for MSHA mine 3401702

Current hierarchy: **Wilbur P  Drake → Western Ok Sand & Gravel → JONES #1**

- 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:** Western Ok Sand & Gravel → JONES #1; 1990-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wilbur P  Drake → JONES #1; 1990-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wilbur P  Drake → Western Ok Sand & Gravel; 1990-01-01 to current/open; source msha-controller-operator-history