# Relationship history for MSHA mine 1401618

Current hierarchy: **Gary  Servaes → Gary Servaes Enterprises → Denton Mine**

- 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:** Gary Servaes Enterprises → Denton Mine; 2002-05-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gary  Servaes → Denton Mine; 2002-05-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Servaes → Gary Servaes Enterprises; 2002-05-28 to current/open; source msha-controller-operator-history