# Relationship history for MSHA mine 1513741

Current hierarchy: **Benjamin R.  Bennett → B S B Coal Company Inc → K O K No 3**

- 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:** Benjamin R.  Bennett → K O K No 3; 1981-09-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B S B Coal Company Inc → K O K No 3; 1982-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Benjamin R.  Bennett → B S B Coal Company Inc; 1982-09-01 to current/open; source msha-controller-operator-history