# Relationship history for MSHA mine 0405833

Current hierarchy: **Brian  Hurt; Steven  Evans-Freke → Grist Creek Aggregates LLC → Grist Creek Aggregates, Longvale Plant**

- 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:** Grist Creek Aggregates LLC → Grist Creek Aggregates, Longvale Plant; 2011-12-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Steven  Evans-Freke et al → Grist Creek Aggregates, Longvale Plant; 2011-12-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steven  Evans-Freke et al → Grist Creek Aggregates LLC; 2011-12-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian  Hurt et al → Grist Creek Aggregates LLC; 2011-12-16 to current/open; source msha-controller-operator-history