# Relationship history for MSHA mine 4604609

Current hierarchy: **Anderson James W → Anderson & Anderson Contractors Inc → Gary #9 Surface**

- 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 W → Gary #9 Surface; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Anderson & Anderson Contractors Inc → Gary #9 Surface; 1975-04-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anderson James W → Anderson & Anderson Contractors Inc; 1975-04-23 to current/open; source msha-controller-operator-history