# Relationship history for MSHA mine 2902527

Current hierarchy: **Fernando Conrad  Fresquez → Fresquez Trucking,LLC → Progresso**

- 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:** Fresquez Trucking,LLC → Progresso; 2021-02-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Fernando Conrad  Fresquez → Progresso; 2021-02-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fernando Conrad  Fresquez → Fresquez Trucking,LLC; 2021-02-19 to current/open; source msha-controller-operator-history