# Relationship history for MSHA mine 4801754

Current hierarchy: **Sharon L  Anderson; Brian C  Anderson → Platte Valley Forrest Management LLC → Platte Valley Gravel**

- 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:** Platte Valley Forrest Management LLC → Platte Valley Gravel; 2011-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sharon L  Anderson et al → Platte Valley Gravel; 2011-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sharon L  Anderson et al → Platte Valley Forrest Management LLC; 2011-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian C  Anderson et al → Platte Valley Forrest Management LLC; 2011-06-30 to current/open; source msha-controller-operator-history