# Relationship history for MSHA mine 4607976

Current hierarchy: **Anderson James → Macjan Inc → Greenbriar 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Anderson James Et Al → Greenbriar Strip; 1983-11-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Macjan Inc → Greenbriar Strip; 1990-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anderson James Et Al → Macjan Inc; 1990-11-01 to current/open; source msha-controller-operator-history