# Relationship history for MSHA mine 1700897

Current hierarchy: **Vaughn D.  Thibodeau II → General Contractor Vaughn D. Thibodeau II, Inc. → Prospect Crushing Plant**

- 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:** General Contractor Vaughn D. Thibodeau II, Inc. → Prospect Crushing Plant; 2012-05-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Vaughn D.  Thibodeau II → Prospect Crushing Plant; 2012-05-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vaughn D.  Thibodeau II → General Contractor Vaughn D. Thibodeau II, Inc.; 2012-05-30 to current/open; source msha-controller-operator-history