# Relationship history for MSHA mine 3607612

Current hierarchy: **Kendzor Paul & Ronald Black → Kendzor & Black → Dodge Shaft Stripping #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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Kendzor & Black → Dodge Shaft Stripping #2; 1984-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kendzor Paul & Ronald Black → Dodge Shaft Stripping #2; 1984-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kendzor Paul & Ronald Black → Kendzor & Black; 1984-09-01 to current/open; source msha-controller-operator-history