# Relationship history for MSHA mine 4703062

Current hierarchy: **Keith  Baughman; Shirley  Baughman → Keith Baughman Trucking & Excavating → CRUSHER**

- 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:** Keith Baughman Trucking & Excavating → CRUSHER; 1995-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Keith  Baughman et al → CRUSHER; 1995-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keith  Baughman et al → Keith Baughman Trucking & Excavating; 1995-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shirley  Baughman et al → Keith Baughman Trucking & Excavating; 1995-10-01 to current/open; source msha-controller-operator-history