# Relationship history for MSHA mine 1202483

Current hierarchy: **Timothy C Yarberry → YARDBERRY LANDSCAPE COMPANY → YARBERRY CLEAN FILL SAND AND GRAVEL**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Yardberry Landscape Company → YARBERRY CLEAN FILL SAND AND GRAVEL; 2017-03-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Timothy C Yarberry → YARBERRY CLEAN FILL SAND AND GRAVEL; 2017-03-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timothy C Yarberry → Yardberry Landscape Company; 2017-03-14 to current/open; source msha-controller-operator-history