# Relationship history for MSHA mine 4406278

Current hierarchy: **Richard G  Preservati II → Ritchie Equipment Inc → Deep Mine #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:** Richard G  Preservati II → Deep Mine #1; 1986-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ritchie Equipment Inc → Deep Mine #1; 1986-10-01 to 1987-12-27; source msha-controller-operator-history
- **controller_controls_operator:** Richard G  Preservati II → Ritchie Equipment Inc; 1986-10-01 to 1987-12-27; source msha-controller-operator-history
- **operator_operates_mine:** Lotta Coal Inc → Deep Mine #1; 1987-12-28 to 1990-12-26; source msha-controller-operator-history
- **controller_controls_mine:** Caffrey John E → Deep Mine #1; 1987-12-28 to 1990-12-26; source msha-controller-operator-history
- **controller_controls_operator:** Caffrey John E → Lotta Coal Inc; 1987-12-28 to 1990-12-26; source msha-controller-operator-history
- **controller_controls_mine:** Charles H  Gent → Deep Mine #1; 1988-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hank K  Matney  et al → Deep Mine #1; 1989-04-07 to 1992-02-23; source msha-controller-operator-history
- **operator_operates_mine:** Top Flite Coal Corp → Deep Mine #1; 1990-12-27 to 1992-02-23; source msha-controller-operator-history
- **controller_controls_operator:** Hank K  Matney  et al → Top Flite Coal Corp; 1990-12-27 to 1992-02-23; source msha-controller-operator-history
- **operator_operates_mine:** H B & B Equipment Company Inc → Deep Mine #1; 1992-02-24 to 1994-02-15; source msha-controller-operator-history
- **controller_controls_operator:** Charles H  Gent → H B & B Equipment Company Inc; 1992-02-24 to 1994-02-15; source msha-controller-operator-history
- **operator_operates_mine:** Turnpike Coal Company Inc → Deep Mine #1; 1994-02-16 to 1995-03-29; source msha-controller-operator-history
- **controller_controls_mine:** Everett E  Ballard Jr → Deep Mine #1; 1994-02-16 to 1995-03-29; source msha-controller-operator-history
- **controller_controls_operator:** Everett E  Ballard Jr → Turnpike Coal Company Inc; 1994-02-16 to 1995-03-29; source msha-controller-operator-history
- **operator_operates_mine:** Ritchie Equipment Inc → Deep Mine #1; 1995-03-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard G  Preservati II → Ritchie Equipment Inc; 1995-03-30 to current/open; source msha-controller-operator-history