# Relationship history for MSHA mine 2103160

Current hierarchy: **Scott R  Hetteen → R & Q Trucking, Inc. → Sehlstrom Pit**

- 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:** R & Q Trucking, Inc. → Sehlstrom Pit; 1998-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richard A  Hetteen → Sehlstrom Pit; 1998-05-01 to 2025-06-08; source msha-controller-operator-history
- **controller_controls_operator:** Richard A  Hetteen → R & Q Trucking, Inc.; 1998-05-01 to 2025-06-08; source msha-controller-operator-history
- **controller_controls_mine:** Scott R  Hetteen → Sehlstrom Pit; 2025-06-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott R  Hetteen → R & Q Trucking, Inc.; 2025-06-09 to current/open; source msha-controller-operator-history