WM. J Keller & Sons Construction Corp is a heavy highway construction company located at 1435 Route 9, Castleton, New York. Principal areas of work include: Site Work, Including Subdivision Development. Utilities - Storm, Water, Sewer, Directional Drilling and Horizontal Earth Boring/Jacking. Treatment Plants - Water & Sewer, New Construction and Rehabilitation. NYSDOT - Highway Pavement Structure, Bridges, Dams, Cofferdams, Sheet Piling, Bearing Piles, R/C Structures, Decks, Joints, Retaining Walls. County & Municipal - Highway Pavement Structure, Bridges, Dams, Cofferdams, Sheet Piling, Bearing Piles, Decks, Joints, Retaining Walls.