# Relationship history for MSHA mine 4801738

Current hierarchy: **Kenneth L  Wilbert; Alex  Clark → Rocks In Stones, LLC → Rocks In Stones #1**

- 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:** Rocks In Stones, LLC → Rocks In Stones #1; 2009-06-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alex  Clark et al → Rocks In Stones #1; 2009-06-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alex  Clark et al → Rocks In Stones, LLC; 2009-06-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth L  Wilbert et al → Rocks In Stones, LLC; 2009-06-18 to current/open; source msha-controller-operator-history