# Relationship history for MSHA mine 1700937

Current hierarchy: **David  Pepin → R. Pepin and Sons Concrete → Portable Plant -Pegason Jaw**

- 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:** David  Pepin → Portable Plant -Pegason Jaw; 1995-12-29 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** R. Pepin and Sons Concrete → Portable Plant -Pegason Jaw; 2014-06-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Pepin → R. Pepin and Sons Concrete; 2014-06-11 to current/open; source msha-controller-operator-history