# Relationship history for MSHA mine 3402206

Current hierarchy: **Bobbette D  Hoevker; Barry K  Hoevker → Ada Aggregates, LLC → AA1**

- 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:** Ada Aggregates, LLC → AA1; 2020-05-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Barry K  Hoevker et al → AA1; 2020-05-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Barry K  Hoevker et al → Ada Aggregates, LLC; 2020-05-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bobbette D  Hoevker et al → Ada Aggregates, LLC; 2020-05-18 to current/open; source msha-controller-operator-history