# Relationship history for MSHA mine 3605000

Current hierarchy: **Demchak Jerome P → Chew'S Contracting Company Inc → Judi #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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Chew'S Contracting Company Inc → Judi #1; 1974-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Demchak Jerome P → Judi #1; 1974-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Demchak Jerome P → Chew'S Contracting Company Inc; 1974-02-01 to current/open; source msha-controller-operator-history