# Relationship history for MSHA mine 2402426

Current hierarchy: **Kevin L  Pierce → Three Rivers Aggregate LLC → 3 Rivers Aggregate LLC**

- 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:** Three Rivers Aggregate LLC → 3 Rivers Aggregate LLC; 2005-10-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kevin L  Pierce → 3 Rivers Aggregate LLC; 2005-10-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kevin L  Pierce → Three Rivers Aggregate LLC; 2005-10-21 to current/open; source msha-controller-operator-history