# Relationship history for MSHA mine 1519910

Current hierarchy: **Jason D Tackett → Tackett Energies, LLC → No. 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:** Jason D Tackett → No. 1; 2019-04-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tackett Energies, LLC → No. 1; 2021-12-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jason D Tackett → Tackett Energies, LLC; 2021-12-15 to current/open; source msha-controller-operator-history