# Relationship history for MSHA mine 1601420

Current hierarchy: **Luke S  Dupont → Dupont Sand LLC → Dupont Sand Pit LLC**

- 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:** Pumped Sand Material LLC → Dupont Sand Pit LLC; 2005-02-24 to 2008-05-29; source msha-controller-operator-history
- **controller_controls_mine:** Vincent C  Perry → Dupont Sand Pit LLC; 2005-02-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vincent C  Perry → Pumped Sand Material LLC; 2005-02-24 to 2008-05-29; source msha-controller-operator-history
- **operator_operates_mine:** Dupont Sand LLC → Dupont Sand Pit LLC; 2008-05-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Luke S  Dupont → Dupont Sand Pit LLC; 2008-05-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Luke S  Dupont → Dupont Sand LLC; 2008-05-30 to current/open; source msha-controller-operator-history