# Relationship history for MSHA mine 5001707

Current hierarchy: **Justin R  Ness → Arctic Ness Transport & Excavation → Arctic Ness Mine**

- 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:** Harvey Mechanical Company → Arctic Ness Mine; 2001-05-01 to 2022-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Kieth W  Harvey → Arctic Ness Mine; 2001-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kieth W  Harvey → Harvey Mechanical Company; 2001-05-01 to 2022-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Arctic Ness Transport & Excavation → Arctic Ness Mine; 2022-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Justin R  Ness → Arctic Ness Mine; 2022-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Justin R  Ness → Arctic Ness Transport & Excavation; 2022-08-01 to current/open; source msha-controller-operator-history