Knowlton Township Planning Board Address: 628 State Route 94, Columbia, NJ 07832 Phone: (908) 496-4731 City Government Other Businesses: 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 Maintenance Building at 628 State Route 94, Columbia, NJ 07832