# Relationship history for MSHA mine 2103382

Current hierarchy: **Dave  Reimer → Belle Plaine Sand & Gravel Inc → Wash Plant #1**

- 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

- **operator_operates_mine:** Belle Plaine Sand & Gravel Inc → Wash Plant #1; 2003-08-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dave  Reimer → Wash Plant #1; 2003-08-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dave  Reimer → Belle Plaine Sand & Gravel Inc; 2003-08-10 to current/open; source msha-controller-operator-history