# Relationship history for MSHA mine 1700686

Current hierarchy: **Scott  Dugas → Scott Dugas Trucking & Excavating Inc → Pegson Premier Track Crusher 44X26**

- 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:** Scott  Dugas → Pegson Premier Track Crusher 44X26; 1986-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Scott Dugas Trucking & Excavating Inc → Pegson Premier Track Crusher 44X26; 2000-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott  Dugas → Scott Dugas Trucking & Excavating Inc; 2000-10-01 to current/open; source msha-controller-operator-history