# Relationship history for MSHA mine 4104475

Current hierarchy: **James R  Stewart; Jason T  Stewart → Stewart Dirt Work, Inc. → Stewart Dirt Work Inc - Hanna Pit**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Stewart Dirt Work, Inc. → Stewart Dirt Work Inc - Hanna Pit; 2004-05-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James R  Stewart et al → Stewart Dirt Work Inc - Hanna Pit; 2004-05-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James R  Stewart et al → Stewart Dirt Work, Inc.; 2004-05-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jason T  Stewart et al → Stewart Dirt Work, Inc.; 2004-05-18 to current/open; source msha-controller-operator-history