# Relationship history for MSHA mine 4105071

Current hierarchy: **Randall D  Smith → West Texas Rock Resources, LLC → WTRR McCrea**

- 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

- **controller_controls_mine:** Randall D  Smith → WTRR McCrea; 2007-02-07 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** West Texas Rock Resources, LLC → WTRR McCrea; 2014-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randall D  Smith → West Texas Rock Resources, LLC; 2014-06-16 to current/open; source msha-controller-operator-history