Hydraulic and Hydrologic (H&H) Modeling for Aquatic Organism Passage

The contract requires comprehensive hydraulic and hydrologic modeling to evaluate the performance of existing culverts under a range of flow conditions, with the goal of identifying limitations to aquatic organism passage. The modeling effort will inform the design of a replacement structure that promotes natural stream processes and supports fish migration by incorporating natural substrate materials and flow conditions that mimic undisturbed habitats. The work must account for site-specific hydrologic data, seasonal flow variations, and ecological requirements to ensure the proposed solution is both hydrologically sound and biologically effective. The project is classified as a subcontract under NAICS code 541620 and is being managed by the Vermont office of the Department of Economic Development. Proposals are due by August 4, 2026, and the work is expected to be performed in Vermont, although the precise location is not specified. The focus is on delivering a science-based design that enhances ecological connectivity while maintaining hydraulic functionality, with an emphasis on long-term sustainability and minimal environmental disruption. There is no set-aside designation indicated, and the solicitation is open to qualified subcontractors capable of executing advanced hydraulic modeling and ecological design solutions.