# Relationship history for MSHA mine 3600849

Current hierarchy: **Gilbert E  Caroff → Colfax Inc → Mine 40**

- 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

- **operator_operates_mine:** Jandy Coal Company Inc → Mine 40; 1950-01-01 to 1982-12-29; source msha-controller-operator-history
- **controller_controls_mine:** Verna Andrew → Mine 40; 1950-01-01 to 1982-12-29; source msha-controller-operator-history
- **controller_controls_operator:** Verna Andrew → Jandy Coal Company Inc; 1950-01-01 to 1982-12-29; source msha-controller-operator-history
- **operator_operates_mine:** Colfax Inc → Mine 40; 1982-12-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gilbert E  Caroff → Mine 40; 1982-12-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gilbert E  Caroff → Colfax Inc; 1982-12-30 to current/open; source msha-controller-operator-history