Evansville is the county seat of Vanderburgh County. Some of the city's governmental functions are shared with Vanderburgh County officials. In recent years various bi-partisan groups have advocated merging the Evansville city and Vanderburgh County governments, as was done in other surrounding cities such as Indianapolis, Louisville, and Nashville. Evansville and Vanderburgh County already have a number of notable merged government functions. The school system is consolidated countywide in the Evansville Vanderburgh School Corporation and the library system is consolidated countywide in the Evansville Vanderburgh Public Library. Additional countywide authorities are in place for the Evansville Regional Airport and for flood control via the countywide levee authority.