Soil Compaction & Sub-Grade Preparation

The contract requires the execution of sub-grade preparation and compaction work to support drainage structures, with all activities must adhere to the engineering standards specified by ASTM D-1557 to ensure proper soil density and stability. The work is focused on creating a solid, well-compacted foundation capable of supporting infrastructure while maintaining effective drainage performance, and compliance with these technical specifications is mandatory. This subcontract is issued by the City of Corona under NAICS code 238910, which categorizes it as other heavy and civil engineering construction, and the performance location is in Corona, California. The solicitation was posted on July 6, 2026, and the project is part of a broader public infrastructure initiative overseen by the city, with no set-aside provisions identified. All work must be completed on-site in accordance with local and federal engineering protocols to meet the structural and hydrologic demands of the drainage systems being installed.