Lopez Bros Inc Grading & Asphalt services High Desert California, specializes in Grading, New Asphalt, Asphalt Repairs, Crack Filling, Sealcoating, Line Striping, ADA Compliance and more. Servicing High Desert and Rancho, Cucamonga, Ontario, San Bernardio, Fontana, and Palm Springs. Counties we service include Riverside, Los Angeles, and Orange County.