# Relationship history for MSHA mine 4002601

Current hierarchy: **Thomas Brothers → Thomas Brothers → Jasper Job**

- 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:** Thomas Brothers → Jasper Job; 1980-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thomas Brothers → Jasper Job; 1980-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas Brothers → Thomas Brothers; 1980-03-01 to current/open; source msha-controller-operator-history