# Relationship history for MSHA mine 1001941

Current hierarchy: **Kary S  Yates; Cindy W  Yates → K D Excavation → RIVER VIEW 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** K D Excavation → RIVER VIEW MINE; 1998-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cindy W  Yates et al → RIVER VIEW MINE; 1998-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cindy W  Yates et al → K D Excavation; 1998-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kary S  Yates et al → K D Excavation; 1998-05-01 to current/open; source msha-controller-operator-history