# Relationship history for MSHA mine 3606204

Current hierarchy: **Chutz Robert & David → Chutz Contracting Limited → Chutz**

- 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:** Chutz Contracting Limited → Chutz; 1976-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Chutz Robert & David Et Al → Chutz; 1976-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chutz Robert & David Et Al → Chutz Contracting Limited; 1976-08-01 to current/open; source msha-controller-operator-history