Knowlton Township Maintenance Building Address: 628 State Route 94, Columbia, NJ 07832 Phone: (908) 496-4265 City Government Other Businesses: Knowlton Township Planning Board at 628 State Route 94, Columbia, NJ 07832 D C Santini Esq at 43 US Highway 46, Columbia, NJ 07832 Santini Dominick C Esq at 43 US Hwy No 46, Columbia, NJ 07832 Knowlton Township Clerk at 628 State Route 94, Columbia, NJ 07832