Kass Bros Inc. has been in business for nearly 65 years performing site preparation work, concrete paving, underground utility work, demolition, and excavation for private and public entities.. Concrete Paving (Curb,Gutter,Sidewalk,Roadway,Flatwork),Underground Utilities (Drainage,Water and Sanitary Sewer Systems),Structural Demolition,Site Preparation Work (Land Clearing,Grubbing,Grading,Excavation,Site Fill) Sand and Aggregates