# Relationship history for MSHA mine 2401685

Current hierarchy: **Knife River Corporation → JTL Group, Inc. → KALISPELL CRUSHER**

- 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:** Meredith  Reiter → KALISPELL CRUSHER; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Empire Sand & Gravel Company Inc → KALISPELL CRUSHER; 1982-09-01 to 2000-06-05; source msha-controller-operator-history
- **controller_controls_operator:** Meredith  Reiter → Empire Sand & Gravel Company Inc; 1982-09-01 to 2000-06-05; source msha-controller-operator-history
- **controller_controls_mine:** MDU Resources Group Inc → KALISPELL CRUSHER; 1999-09-01 to 2023-05-31; source msha-controller-operator-history
- **operator_operates_mine:** JTL Group, Inc. → KALISPELL CRUSHER; 2000-06-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** MDU Resources Group Inc → JTL Group, Inc.; 2000-06-06 to 2023-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Knife River Corporation → KALISPELL CRUSHER; 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