# Relationship history for MSHA mine 4202676

Current hierarchy: **Timothy E Nelson → T.E. Nelson Company LLC → TENC-C001**

- 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.E. Nelson Company LLC → TENC-C001; 2017-08-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Timothy E Nelson → TENC-C001; 2017-08-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timothy E Nelson → T.E. Nelson Company LLC; 2017-08-10 to current/open; source msha-controller-operator-history