# Relationship history for MSHA mine 3609511

Current hierarchy: **Neil  Schenck → J C Coal Inc → Selkirk 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:** Greg  Schenck → Selkirk 2; 1997-07-01 to 2012-04-15; source msha-controller-operator-history
- **operator_operates_mine:** J C Coal Inc → Selkirk 2; 2007-05-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Greg  Schenck → J C Coal Inc; 2007-05-02 to 2012-04-15; source msha-controller-operator-history
- **controller_controls_mine:** Neil  Schenck → Selkirk 2; 2012-04-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Neil  Schenck → J C Coal Inc; 2012-04-16 to current/open; source msha-controller-operator-history