# Relationship history for MSHA mine 3304448

Current hierarchy: **Zak E.  Holland → Mid-West Crushing, LLC → Pegson**

- 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:** American Excavating Inc → Pegson; 1999-11-01 to 2007-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Robert E  Holland → Pegson; 1999-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert E  Holland → American Excavating Inc; 1999-11-01 to 2007-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Mid-West Crushing, LLC → Pegson; 2007-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Zak E.  Holland → Pegson; 2007-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Zak E.  Holland → Mid-West Crushing, LLC; 2007-05-01 to current/open; source msha-controller-operator-history