Specifications include, but are not limited to: Bituminous Concrete pavement/top shall be placed as an overlay at a minimum of 1 and 1/2" of thickness and in accordance with all State of Massachusetts, Department of Public Works Specifications. Bidder shall be owner of a bituminous concrete plant and shall be the producers of the bituminous concrete materials listed in the various items. The owner-producer offering the proposal shall have a minimum of 15 years experience in producing the bituminous concrete materials for municipal roadways. CONSTRUCTION METHOD - CLASS I - TYPE I BITUMINOUS CONCRETE PAVEMENT OR TOP - Class I Bituminous Concrete top course (Street Overlay) gradation - Sieve 1/2", Passing 15.5%; 3/8" 25%; Sand 50%; Fines 3%; Oil 6.2%