# Relationship history for MSHA mine 4609433

Current hierarchy: **Tucker County-WV → Tucker County Solid Waste Authority → Tucker County Landfill**

- 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:** Tucker County Solid Waste Authority → Tucker County Landfill; 2011-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tucker County-WV → Tucker County Landfill; 2011-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tucker County-WV → Tucker County Solid Waste Authority; 2011-10-05 to current/open; source msha-controller-operator-history