# Relationship history for MSHA mine 3003635

Current hierarchy: **Maureen  Naughton → Naughton, Naughton & King L.L.C. → NNK-2**

- 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:** Maureen  Naughton et al → NNK-2; 2007-02-06 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Naughton, Naughton & King L.L.C. → NNK-2; 2008-05-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Maureen  Naughton et al → Naughton, Naughton & King L.L.C.; 2008-05-20 to current/open; source msha-controller-operator-history