# Relationship history for MSHA mine 1400412

Current hierarchy: **Instar Holdings LP → Hutchinson Salt Company → Hutchinson Salt Company**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Carey Salt Div-Interpace Corp → Hutchinson Salt Company; 1950-01-01 to 1979-08-02; source msha-controller-operator-history
- **controller_controls_mine:** Jon  Rhine → Hutchinson Salt Company; 1950-01-01 to 1979-10-14; source msha-controller-operator-history
- **controller_controls_operator:** Jon  Rhine → Carey Salt Div-Interpace Corp; 1950-01-01 to 1979-08-02; source msha-controller-operator-history
- **operator_operates_mine:** Carey Salt Inc → Hutchinson Salt Company; 1979-08-03 to 1988-08-19; source msha-controller-operator-history
- **controller_controls_mine:** Fording Inc → Hutchinson Salt Company; 1979-08-03 to 1988-08-19; source msha-controller-operator-history
- **controller_controls_operator:** Fording Inc → Carey Salt Inc; 1979-08-03 to 1988-08-19; source msha-controller-operator-history
- **controller_controls_mine:** Harris Chemical Group → Hutchinson Salt Company; 1988-03-11 to 2001-11-27; source msha-controller-operator-history
- **operator_operates_mine:** North American Salt Company → Hutchinson Salt Company; 1988-08-20 to 1990-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Harris Chemical Group → North American Salt Company; 1988-08-20 to 1990-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Hutchinson Salt Company → Hutchinson Salt Company; 1990-08-01 to 2025-02-23; source msha-controller-operator-history
- **controller_controls_mine:** Larry L  Bingham → Hutchinson Salt Company; 1990-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry L  Bingham → Hutchinson Salt Company; 1990-08-01 to 2025-02-23; source msha-controller-operator-history
- **controller_controls_mine:** Compass Minerals International, Inc. → Hutchinson Salt Company; 2001-11-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Compass Minerals International, Inc. → North American Salt Company; 2001-11-28 to 1990-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Hutchinson Salt Company → Hutchinson Salt Company; 2025-02-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Instar Holdings LP → Hutchinson Salt Company; 2025-02-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Instar Holdings LP → Hutchinson Salt Company; 2025-02-24 to current/open; source msha-controller-operator-history