# Relationship history for MSHA mine 3609963

Current hierarchy: **Kerry  Harris → S & J Coal Mine → Slope #2**

- 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:** Kerry  Harris → Slope #2; 2011-09-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** D & F Deep Mine → Slope #2; 2011-10-19 to 2013-02-26; source msha-controller-operator-history
- **controller_controls_operator:** Kerry  Harris → D & F Deep Mine; 2011-10-19 to 2013-02-26; source msha-controller-operator-history
- **operator_operates_mine:** S & J Coal Mine → Slope #2; 2013-02-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kerry  Harris → Slope #2; 2013-02-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kerry  Harris → S & J Coal Mine; 2013-02-27 to current/open; source msha-controller-operator-history