# Relationship history for MSHA mine 4703847

Current hierarchy: **Tim  Musson → Musson Bros., Inc. → McKloskey Screen**

- 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

- **controller_controls_mine:** Tim  Musson → McKloskey Screen; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Musson Bros., Inc. → McKloskey Screen; 2019-07-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tim  Musson → Musson Bros., Inc.; 2019-07-08 to current/open; source msha-controller-operator-history