# Relationship history for MSHA mine 3901572

Current hierarchy: **James L  Scull Jr; Douglas A  Wilson → Site Work Specialists → Panco Pit Portable #1**

- 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:** Panco LLC → Panco Pit Portable #1; 2011-05-13 to 2011-08-15; source msha-controller-operator-history
- **controller_controls_mine:** Douglas A  Wilson et al → Panco Pit Portable #1; 2011-05-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Douglas A  Wilson et al → Panco LLC; 2011-05-13 to 2011-08-15; source msha-controller-operator-history
- **controller_controls_operator:** James L  Scull Jr et al → Panco LLC; 2011-05-13 to 2011-08-15; source msha-controller-operator-history
- **operator_operates_mine:** Site Work Specialists → Panco Pit Portable #1; 2011-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James L  Scull Jr et al → Panco Pit Portable #1; 2011-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James L  Scull Jr et al → Site Work Specialists; 2011-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Douglas A  Wilson et al → Site Work Specialists; 2011-08-16 to current/open; source msha-controller-operator-history