# Relationship history for MSHA mine 4405966

Current hierarchy: **Jackson Frank → J C Coal Company → #1 Auger**

- 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:** Jackson Frank Et Al → #1 Auger; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** J C Coal Company → #1 Auger; 1982-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jackson Frank Et Al → J C Coal Company; 1982-11-01 to current/open; source msha-controller-operator-history