# Relationship history for MSHA mine 4406571

Current hierarchy: **Cecil T  Brinager → Calico Coal Inc → Mine #7**

- 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:** Richard G  Preservati II → Mine #7; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ernest E  Varney et al → Mine #7; 1989-05-01 to 2012-06-18; source msha-controller-operator-history
- **operator_operates_mine:** Preservati Construction Company Inc → Mine #7; 1991-03-01 to 1994-04-19; source msha-controller-operator-history
- **controller_controls_operator:** Richard G  Preservati II → Preservati Construction Company Inc; 1991-03-01 to 1994-04-19; source msha-controller-operator-history
- **controller_controls_mine:** Everett E  Ballard Jr → Mine #7; 1994-02-16 to 1995-03-29; source msha-controller-operator-history
- **operator_operates_mine:** Turnpike Coal Company Inc → Mine #7; 1994-04-20 to 1995-02-02; source msha-controller-operator-history
- **controller_controls_operator:** Everett E  Ballard Jr → Turnpike Coal Company Inc; 1994-04-20 to 1995-02-02; source msha-controller-operator-history
- **operator_operates_mine:** Calico Coal Inc → Mine #7; 1995-02-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ernest E  Varney et al → Calico Coal Inc; 1995-02-03 to 2012-06-18; source msha-controller-operator-history
- **controller_controls_mine:** Estate of Ernest E Varney → Mine #7; 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 → Mine #7; 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