# Relationship history for MSHA mine 3609824

Current hierarchy: **Timothy M  Smith → Damascus 535 Quarry & Stone Products LLC → Lanesboro Crushing/Lippman J 1, I 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Timothy M  Smith → Lanesboro Crushing/Lippman J 1, I 2; 1997-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Damascus 535 Crushing → Lanesboro Crushing/Lippman J 1, I 2; 2010-01-28 to 2011-08-01; source msha-controller-operator-history
- **controller_controls_operator:** Timothy M  Smith → Damascus 535 Crushing; 2010-01-28 to 2011-08-01; source msha-controller-operator-history
- **operator_operates_mine:** Damascus 535 Quarry & Stone Products LLC → Lanesboro Crushing/Lippman J 1, I 2; 2011-08-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Timothy M  Smith → Lanesboro Crushing/Lippman J 1, I 2; 2011-08-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timothy M  Smith → Damascus 535 Quarry & Stone Products LLC; 2011-08-02 to current/open; source msha-controller-operator-history