# Relationship history for MSHA mine 3606060

Current hierarchy: **Weinman Homer & Daniel → Weinman Brothers → Weinman Brothers Strip**

- 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:** Weinman Brothers → Weinman Brothers Strip; 1976-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Weinman Homer & Daniel → Weinman Brothers Strip; 1976-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Weinman Homer & Daniel → Weinman Brothers; 1976-04-01 to current/open; source msha-controller-operator-history