# Relationship history for MSHA mine 3402209

Current hierarchy: **Dolese Brothers Company → Dolese Bros. Co. → Jones Sand Plant**

- 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

- **controller_controls_mine:** Dolese Brothers Company → Jones Sand Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dolese Bros. Co. → Jones Sand Plant; 2020-07-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dolese Brothers Company → Dolese Bros. Co.; 2020-07-07 to current/open; source msha-controller-operator-history