# Relationship history for MSHA mine 1512405

Current hierarchy: **Jerry  Tackett → Tackett Mining Company Inc → No 6**

- 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:** Vaughn Estille & Dennis R Caldwell → No 6; 1979-11-01 to 1985-09-22; source msha-controller-operator-history
- **operator_operates_mine:** D V & C Coal Company Inc → No 6; 1980-06-01 to 1985-09-22; source msha-controller-operator-history
- **controller_controls_operator:** Vaughn Estille & Dennis R Caldwell → D V & C Coal Company Inc; 1980-06-01 to 1985-09-22; source msha-controller-operator-history
- **controller_controls_mine:** Jerry  Tackett → No 6; 1984-05-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tackett Mining Company Inc → No 6; 1985-09-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerry  Tackett → Tackett Mining Company Inc; 1985-09-23 to current/open; source msha-controller-operator-history