# Relationship history for MSHA mine 4201765

Current hierarchy: **Nash Greg → Greg Nash Company → Cut #1**

- 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:** Greg Nash Company → Cut #1; 1981-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Nash Greg → Cut #1; 1981-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nash Greg → Greg Nash Company; 1981-10-01 to current/open; source msha-controller-operator-history