# Relationship history for MSHA mine 0203413

Current hierarchy: **Gary  Curtis → Desert Aggregates → Plant 1**

- 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:** Desert Aggregates → Plant 1; 2019-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gary  Curtis → Plant 1; 2019-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Curtis → Desert Aggregates; 2019-03-20 to current/open; source msha-controller-operator-history