# Relationship history for MSHA mine 4703978

Current hierarchy: **Chris  Homburg → Homburg Contractors Inc. → Pegson XR400S**

- 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:** Harold N  Homburg → Pegson XR400S; 2005-06-09 to 2016-11-22; source msha-controller-operator-history
- **controller_controls_mine:** Chris  Homburg → Pegson XR400S; 2016-11-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Homburg Contractors Inc. → Pegson XR400S; 2025-05-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harold N  Homburg → Homburg Contractors Inc.; 2025-05-07 to 2016-11-22; source msha-controller-operator-history
- **controller_controls_operator:** Chris  Homburg → Homburg Contractors Inc.; 2025-05-07 to current/open; source msha-controller-operator-history