# Relationship history for MSHA mine 1518821

Current hierarchy: **Larry  Thornsberry; Terry  Thornsberry → Major Elkhorn Mining Company LLC → #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

- **operator_operates_mine:** Major Elkhorn Mining Company LLC → #1; 2004-11-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Larry  Thornsberry et al → #1; 2004-11-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Thornsberry et al → Major Elkhorn Mining Company LLC; 2004-11-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Terry  Thornsberry et al → Major Elkhorn Mining Company LLC; 2004-11-29 to current/open; source msha-controller-operator-history