# Relationship history for MSHA mine 3610041

Current hierarchy: **J Clifford  Forrest III → AK Steel Natural Resources, LLC → North Fork**

- 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

- **controller_controls_mine:** AK Steel Holding Corporation → North Fork; 2012-08-14 to 2020-03-12; source msha-controller-operator-history
- **operator_operates_mine:** AK Coal Resources, Inc. → North Fork; 2013-01-04 to 2023-10-23; source msha-controller-operator-history
- **controller_controls_operator:** AK Steel Holding Corporation → AK Coal Resources, Inc.; 2013-01-04 to 2020-03-12; source msha-controller-operator-history
- **controller_controls_mine:** Cleveland-Cliffs Inc → North Fork; 2020-03-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cleveland-Cliffs Inc → AK Coal Resources, Inc.; 2020-03-13 to 2023-10-23; source msha-controller-operator-history
- **operator_operates_mine:** AK Steel Natural Resources, LLC → North Fork; 2023-10-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** J Clifford  Forrest III → North Fork; 2023-10-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** J Clifford  Forrest III → AK Steel Natural Resources, LLC; 2023-10-24 to current/open; source msha-controller-operator-history