# Relationship history for MSHA mine 0201785

Current hierarchy: **Gerald P  Kocjan; John J  Kocjan → Kocjan Associates Inc → Sandwasher**

- 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:** Kocjan Associates Inc → Sandwasher; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John J  Kocjan et al → Sandwasher; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John J  Kocjan et al → Kocjan Associates Inc; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gerald P  Kocjan et al → Kocjan Associates Inc; 1950-01-01 to current/open; source msha-controller-operator-history