# Relationship history for MSHA mine 3200866

Current hierarchy: **Kerry  Susag → Susag Sand and Gravel, Inc. → Wash Plant #2**

- 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

- **controller_controls_mine:** Mack D  Susag et al → Wash Plant #2; 1950-01-01 to 2024-12-02; source msha-controller-operator-history
- **operator_operates_mine:** Susag Sand and Gravel, Inc. → Wash Plant #2; 2010-08-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mack D  Susag et al → Susag Sand and Gravel, Inc.; 2010-08-05 to 2024-12-02; source msha-controller-operator-history
- **controller_controls_operator:** Kerry  Susag et al → Susag Sand and Gravel, Inc.; 2010-08-05 to 2024-12-02; source msha-controller-operator-history
- **controller_controls_mine:** Kerry  Susag → Wash Plant #2; 2024-12-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kerry  Susag → Susag Sand and Gravel, Inc.; 2024-12-03 to current/open; source msha-controller-operator-history