# Relationship history for MSHA mine 1302347

Current hierarchy: **Ron J  Beach; Gary L  Weihs → Natural Materials LLC → Harlan Shop**

- 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:** Ron J  Beach et al → Harlan Shop; 2006-06-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Natural Materials LLC → Harlan Shop; 2007-06-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ron J  Beach et al → Natural Materials LLC; 2007-06-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary L  Weihs et al → Natural Materials LLC; 2007-06-11 to current/open; source msha-controller-operator-history