# Relationship history for MSHA mine 4801228

Current hierarchy: **Nuclear Dynamics Inc → Nuclear Dynamics Inc → Nubeth Joint Venture In-Situ Uranium Min**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Nuclear Dynamics Inc → Nubeth Joint Venture In-Situ Uranium Min; 1979-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Nuclear Dynamics Inc → Nubeth Joint Venture In-Situ Uranium Min; 1979-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nuclear Dynamics Inc → Nuclear Dynamics Inc; 1979-01-01 to current/open; source msha-controller-operator-history