# Relationship history for MSHA mine 4406993

Current hierarchy: **Cecil T  Brinager → Calico Coal Inc → Meridian #1**

- 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:** Ernest E  Varney et al → Meridian #1; 1989-05-01 to 2012-06-18; source msha-controller-operator-history
- **operator_operates_mine:** Calico Coal Inc → Meridian #1; 2000-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ernest E  Varney et al → Calico Coal Inc; 2000-06-01 to 2012-06-18; source msha-controller-operator-history
- **controller_controls_mine:** Estate of Ernest E Varney → Meridian #1; 2012-06-19 to 2014-04-14; source msha-controller-operator-history
- **controller_controls_operator:** Estate of Ernest E Varney → Calico Coal Inc; 2012-06-19 to 2014-04-14; source msha-controller-operator-history
- **controller_controls_mine:** Cecil T  Brinager → Meridian #1; 2014-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cecil T  Brinager → Calico Coal Inc; 2014-04-15 to current/open; source msha-controller-operator-history