# Relationship history for MSHA mine 1601201

Current hierarchy: **Aubry L  Barber III; Lionel H  Barber → Barber Brothers Contracting Company Llc → ASPHALT PLANT #5 ROCK 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Aubry L  Barber III  et al → ASPHALT PLANT #5 ROCK CRUSHER; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Barber Brothers Contracting Company Llc → ASPHALT PLANT #5 ROCK CRUSHER; 1990-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Aubry L  Barber III  et al → Barber Brothers Contracting Company Llc; 1990-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lionel H  Barber  et al → Barber Brothers Contracting Company Llc; 1990-04-01 to current/open; source msha-controller-operator-history