# Relationship history for MSHA mine 1601094

Current hierarchy: **Aubry L  Barber III; Lionel H  Barber → Barber Brothers  Contracting Co LLC → Tynes Island Gravel 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Lionel H  Barber  et al → Tynes Island Gravel Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Acme Gravel Company Inc → Tynes Island Gravel Pit; 1986-06-01 to 2002-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Lionel H  Barber  et al → Acme Gravel Company Inc; 1986-06-01 to 2002-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Aubry L  Barber III  et al → Acme Gravel Company Inc; 1986-06-01 to 2002-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Barber Brothers  Contracting Co LLC → Tynes Island Gravel Pit; 2002-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lionel H  Barber  et al → Barber Brothers  Contracting Co LLC; 2002-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Aubry L  Barber III  et al → Barber Brothers  Contracting Co LLC; 2002-06-01 to current/open; source msha-controller-operator-history