# Relationship history for MSHA mine 2003677

Current hierarchy: **Richard  Hobig → Algonac Sand & Supply LLC → Algonac Sand & Supply LLC**

- 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:** Algonac Sand & Supply LLC → Algonac Sand & Supply LLC; 2024-06-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richard  Hobig → Algonac Sand & Supply LLC; 2024-06-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard  Hobig → Algonac Sand & Supply LLC; 2024-06-17 to current/open; source msha-controller-operator-history