# Relationship history for MSHA mine 3003827

Current hierarchy: **Carver P  Laraway → Carver Sand and Gravel LLC → Power Track- Power Screen #9006**

- 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:** Carver P  Laraway et al → Power Track- Power Screen #9006; 1995-11-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Carver Sand and Gravel LLC → Power Track- Power Screen #9006; 2011-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carver P  Laraway et al → Carver Sand and Gravel LLC; 2011-12-01 to current/open; source msha-controller-operator-history