Additional clearwell storage was needed at the Sallisaw Water Treatment Plant to satisfy future water demand and CT requirements, and also to facilitate maintenance activities on the existing 1.7 million gallon (MG) welded steel ground storage tank. The project included the construction of a 1.5 MG precast prestressed concrete ground storage tank and associated site piping and valving. This provided the City of Sallisaw with additional clearwell capacity to meet future City and wholesale customer demand requirements. The new clearwell also incorporates baffles to ensure tank mixing and satisfy CT requirements. The new and existing clearwells may be operated independently of one another for maintenance purposes or operated in series. Hawkins-Weir Engineers provided study, project design, construction observation, and construction management services for the project. The project’s loan was provided by the Drinking Water State Revolving Fund (DWSRF) as administered by the Oklahoma Department of Environmental Quality, and “Buy American” certifications were required.