# Relationship history for MSHA mine 1518887

Current hierarchy: **Charles  Collins → CKJ Enterprises, Inc → #12A**

- 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:** Randy  Gilkerson et al → #12A; 1992-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Carl  Kirk et al → #12A; 2000-05-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ember Contracting Inc → #12A; 2005-06-20 to 2008-03-19; source msha-controller-operator-history
- **controller_controls_operator:** Randy  Gilkerson et al → Ember Contracting Inc; 2005-06-20 to 2008-03-19; source msha-controller-operator-history
- **operator_operates_mine:** Marshall Mining Inc → #12A; 2008-03-20 to 2020-02-03; source msha-controller-operator-history
- **controller_controls_operator:** Carl  Kirk et al → Marshall Mining Inc; 2008-03-20 to 2020-02-03; source msha-controller-operator-history
- **controller_controls_mine:** Charles  Collins → #12A; 2014-12-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CKJ Enterprises, Inc → #12A; 2020-02-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles  Collins → CKJ Enterprises, Inc; 2020-02-04 to current/open; source msha-controller-operator-history