# Relationship history for MSHA mine 4801383

Current hierarchy: **Knife River Corporation → JTL Group, Inc. → Star Pit #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:** Star Aggregates Inc → Star Pit #1; 1983-05-01 to 2007-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Edward L  Haak → Star Pit #1; 1983-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edward L  Haak → Star Aggregates Inc; 1983-05-01 to 2007-12-31; source msha-controller-operator-history
- **controller_controls_mine:** MDU Resources Group Inc → Star Pit #1; 1999-09-01 to 2023-05-31; source msha-controller-operator-history
- **operator_operates_mine:** JTL Group, Inc. → Star Pit #1; 2008-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** MDU Resources Group Inc → JTL Group, Inc.; 2008-01-01 to 2023-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Knife River Corporation → Star Pit #1; 2023-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Knife River Corporation → JTL Group, Inc.; 2023-06-01 to current/open; source msha-controller-operator-history