Central Illinois Municipal Aggregation Central Illinois Municipal Aggregation (CIMA), is group of Central Illinois communities that have joined together to procure low electric rates for their residents. Member Communities AthensAtlantaBenldBloomingtonBunker HillCarthageChrismanGreenviewHeyworthKansasLincolnLogan CountyMt ZionNormalPawneePetersburgPrincevilleRandolph Township