# Relationship history for MSHA mine 3002897

Current hierarchy: **Bloomquist J → Maple Grove Farms → MAPLE GROVE FARMS**

- 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:** Maple Grove Farms → MAPLE GROVE FARMS; 1989-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bloomquist J → MAPLE GROVE FARMS; 1989-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bloomquist J → Maple Grove Farms; 1989-07-01 to current/open; source msha-controller-operator-history