# Relationship history for MSHA mine 4702842

Current hierarchy: **Glenn  Kafka; Beverly  Kafka → Kafka Granite LLC → Ridgeview**

- 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:** Beverly  Kafka et al → Ridgeview; 1984-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kafka Granite LLC → Ridgeview; 1986-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Beverly  Kafka et al → Kafka Granite LLC; 1986-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Glenn  Kafka et al → Kafka Granite LLC; 1986-10-01 to current/open; source msha-controller-operator-history