# Relationship history for MSHA mine 2602103

Current hierarchy: **Gold Field Coalition Tunnel Company → Apex-76 Deep Mines Company → Vanderbilt**

- 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:** Gold Field Coalition Tunnel Company → Vanderbilt; 1979-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Apex-76 Deep Mines Company → Vanderbilt; 1989-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gold Field Coalition Tunnel Company → Apex-76 Deep Mines Company; 1989-03-01 to current/open; source msha-controller-operator-history