# Relationship history for MSHA mine 5001917

Current hierarchy: **John  Emmi; Steve M  Bargabos → B & E Construction → B & E**

- 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

- **operator_operates_mine:** B & E Construction → B & E; 2009-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Steve M  Bargabos et al → B & E; 2009-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve M  Bargabos et al → B & E Construction; 2009-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Emmi  et al → B & E Construction; 2009-10-01 to current/open; source msha-controller-operator-history