# Relationship history for MSHA mine 0102401

Current hierarchy: **Phillips J N → Phillips Mining Company Inc → Parker Branch**

- 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:** Phillips Mining Company Inc → Parker Branch; 1981-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Phillips J N → Parker Branch; 1981-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Phillips J N → Phillips Mining Company Inc; 1981-11-01 to current/open; source msha-controller-operator-history