Summary of DSOD_June_5_2026.pdf

This is a Request for Qualifications (RFQ) document from the City of Napa, California, in conjunction with the California Division of Safety of Dams (DSOD) and the U.S. Army Corps of Engineers (USACE), seeking qualified multidisciplinary engineering consulting firms to provide comprehensive services for the Conn Dam Stability Assessment, Spillway Improvements, and Long-Term Reservoir Expansion Feasibility Study. The City requires professional engineering, geotechnical, environmental, hydraulic, structural, dam safety, and economic evaluation services. The project is structured in three phases: Phase One involves generating a geotechnical data report required for submission to DSOD by December 31, 2028; Phase Two includes a comprehensive assessment of dam stability, deformation estimates under static and seismic conditions; and Phase Three develops a feasibility alternatives analysis addressing identified deficiencies including known spillway deficiencies. The procurement will follow a Qualifications-Based Selection (QBS) process consistent with federal requirements under 2 CFR Part 200 and the Brooks Act, as federal funding is anticipated for design and construction phases. The Conn Creek Dam project is specifically identified in the 2022 Water Resources Development Act (WRDA).

The project anticipates federal funding participation for both design and construction phases, aligning with USACE federally authorized flood risk reduction studies and DSOD regulatory compliance requirements. The selected consultant will provide technical basis and support for future environmental review, design permitting, and construction activities. The engagement requires expertise in advancing long-term improvements to increase water supply reliability while meeting applicable federal and state dam safety regulations and standards.