# Relationship history for MSHA mine 4105609

Current hierarchy: **Barrington L  Holsey → Holsey Mining, Inc → Cayuga Site**

- 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:** Barrington L  Holsey → Cayuga Site; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Holsey Mining, Inc → Cayuga Site; 2022-03-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Barrington L  Holsey → Holsey Mining, Inc; 2022-03-02 to current/open; source msha-controller-operator-history