Hydrologic and Hydraulic Modeling Services

The contract involves providing comprehensive hydrology and hydraulics modeling services to support flood risk assessment and management efforts for the County of Orange Public Works. Key responsibilities include conducting detailed H&H analyses using industry-standard models such as HEC-RAS and HEC-1 to evaluate water flow, flood levels, and channel behavior. The work will also require the development of accurate floodplain mapping to support Letters of Map Revision and Conditional Letters of Map Revision submissions to federal agencies, ensuring regulatory compliance and updated flood insurance rates. Additionally, the contractor will perform dam inundation studies to assess potential flood impacts downstream in the event of dam failure or overtopping, contributing to emergency preparedness and infrastructure safety. All work is to be performed in Santa Ana, California, with a delivery deadline of August 13, 2026. The solicitation is classified as a subcontract under NAICS code 541620, indicating it falls under engineering services. The contract is not subject to any specific set-aside requirements, and performance must meet technical standards sufficient to support official FEMA floodplain determinations and public safety initiatives. The county expects high accuracy in modeling outputs, thorough documentation, and adherence to federal and state hydrologic guidelines throughout the project lifecycle.