# Relationship history for MSHA mine 0203204

Current hierarchy: **Jack  Dekker; Kandi  Andresen → J & D Excavators Inc → Got Rock 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** J & D Excavators Inc → Got Rock 1; 2008-01-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jack  Dekker et al → Got Rock 1; 2008-01-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jack  Dekker et al → J & D Excavators Inc; 2008-01-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kandi  Andresen et al → J & D Excavators Inc; 2008-01-31 to current/open; source msha-controller-operator-history