The Geological Survey is offering a funding opportunity for research to study overwinter hydrodynamics on Lake Erie coldwater fish spawning reefs. This cooperative agreement is being issued under the Cooperative Ecosystem Studies Unit (CESU) Program, specifically for partners of the Great Lakes-Northern Forest CESU Program. The research aims to understand the hydrodynamics of Lake Erie and its impact on coldwater fish spawning reefs during the winter season. The funding opportunity does not require cost sharing or matching. Applications must be submitted electronically by 5:00 p.m., ET, on July 15, 2024.