# Relationship history for MSHA mine 1519108

Current hierarchy: **Rick H  Varney → Mountain View Excavating → No. 1**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Kevin E  Prater → No. 1; 2005-01-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rick H  Varney → No. 1; 2006-09-07 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Prater Construction, Inc → No. 1; 2007-05-08 to 2007-11-13; source msha-controller-operator-history
- **controller_controls_operator:** Kevin E  Prater → Prater Construction, Inc; 2007-05-08 to 2007-11-13; source msha-controller-operator-history
- **operator_operates_mine:** Mountain View Excavating → No. 1; 2007-11-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rick H  Varney → Mountain View Excavating; 2007-11-14 to current/open; source msha-controller-operator-history