# Relationship history for MSHA mine 3605016

Current hierarchy: **Drebitko Andrew → Drew Development Company Inc → Bear Valley Bank**

- 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

- **operator_operates_mine:** W & J Coal Company → Bear Valley Bank; 1950-01-01 to 1978-10-11; source msha-controller-operator-history
- **controller_controls_mine:** W & J Coal Company → Bear Valley Bank; 1950-01-01 to 1978-10-11; source msha-controller-operator-history
- **controller_controls_operator:** W & J Coal Company → W & J Coal Company; 1950-01-01 to 1978-10-11; source msha-controller-operator-history
- **controller_controls_mine:** Drebitko Andrew → Bear Valley Bank; 1975-06-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Drew Development Company Inc → Bear Valley Bank; 1978-10-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Drebitko Andrew → Drew Development Company Inc; 1978-10-12 to current/open; source msha-controller-operator-history