# Relationship history for MSHA mine 0203406

Current hierarchy: **Craig A Bennetts → Rio Aggregate Services Inc. → Black Mountain Farms 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

- **operator_operates_mine:** Rio Aggregate Services Inc. → Black Mountain Farms Pit; 2018-11-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Craig A Bennetts et al → Black Mountain Farms Pit; 2018-11-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Craig A Bennetts et al → Rio Aggregate Services Inc.; 2018-11-28 to current/open; source msha-controller-operator-history