# Relationship history for MSHA mine 2302249

Current hierarchy: **Colas S A → Brown Sand & Gravel → Brown Sand & Gravel Caruthersville 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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Colas S A → Brown Sand & Gravel Caruthersville Plant; 1999-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Brown Sand & Gravel → Brown Sand & Gravel Caruthersville Plant; 2001-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Colas S A → Brown Sand & Gravel; 2001-08-16 to current/open; source msha-controller-operator-history