# Relationship history for MSHA mine 3606838

Current hierarchy: **Ryan James V → Schuylkill Contracting Company → Eagle Hill 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Ryan James V → Eagle Hill Bank; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Drebitko Andrew → Eagle Hill Bank; 1975-06-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Drew Development Company Inc → Eagle Hill Bank; 1979-05-01 to 1980-04-01; source msha-controller-operator-history
- **controller_controls_operator:** Drebitko Andrew → Drew Development Company Inc; 1979-05-01 to 1980-04-01; source msha-controller-operator-history
- **operator_operates_mine:** Schuylkill Contracting Company → Eagle Hill Bank; 1980-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ryan James V → Schuylkill Contracting Company; 1980-04-02 to current/open; source msha-controller-operator-history