# Relationship history for MSHA mine 3610224

Current hierarchy: **Kerry  Harris → S & J Coal Mine Inc → S&J Coal Blackwood Mining**

- 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:** Kerry  Harris → S&J Coal Blackwood Mining; 2013-02-27 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** S & J Coal Mine Inc → S&J Coal Blackwood Mining; 2017-12-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kerry  Harris → S & J Coal Mine Inc; 2017-12-14 to current/open; source msha-controller-operator-history