Jim Vaughan invented the first chopper pumps back in 1960, Vaughan Company, after working on local dairymen's pumps in his repair shop and realizing the need to "chop" the solids while pumping. Since then, Vaughan Company chopper pumps have been successfully applied on dairies where high reliability and low maintenance are demanded. Farm and agriculture products include manure management equipment and manure chopper pumps. Applications for Vaughan chopper pumps on dairies included: Barn Flush Pit Separator Feed Lagoons Digester Mixing Scraped Manure Manure Management Equipment. Vaughan Company is located in Montesano, Washington.