# Relationship history for MSHA mine 4202687

Current hierarchy: **Kelly  Kent; Joel  Murray → Willard Peak Sand & Gravel, LLC → Willard Peak Sand & Gravel, 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:** Willard Peak Sand & Gravel, LLC → Willard Peak Sand & Gravel, LLC; 2018-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joel  Murray et al → Willard Peak Sand & Gravel, LLC; 2018-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joel  Murray et al → Willard Peak Sand & Gravel, LLC; 2018-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kelly  Kent et al → Willard Peak Sand & Gravel, LLC; 2018-04-30 to current/open; source msha-controller-operator-history