# Relationship history for MSHA mine 3608384

Current hierarchy: **Black Stephen J & David Batistig → B & B Coal Mining Inc → B&B #1 Deep 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

- **controller_controls_mine:** Black Stephen J & David Batistig → B&B #1 Deep Mine; 1989-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B & B Coal Mining Inc → B&B #1 Deep Mine; 1992-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Black Stephen J & David Batistig → B & B Coal Mining Inc; 1992-12-01 to current/open; source msha-controller-operator-history