# Relationship history for MSHA mine 1506397

Current hierarchy: **Tackett Larry → Larry'S Contracting Inc → #1 Tipple**

- 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:** T & N Coal Company → #1 Tipple; 1950-01-01 to 1984-11-11; source msha-controller-operator-history
- **controller_controls_mine:** Newsom Allard & Curt Tackett → #1 Tipple; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Newsom Allard & Curt Tackett → T & N Coal Company; 1950-01-01 to 1984-11-11; source msha-controller-operator-history
- **operator_operates_mine:** Larry'S Contracting Inc → #1 Tipple; 1984-11-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tackett Larry → #1 Tipple; 1984-11-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tackett Larry → Larry'S Contracting Inc; 1984-11-12 to current/open; source msha-controller-operator-history