Gowanlea Ltd. RR#4 11400 Hwy 12 Sunderland, ON. L0C 1H0 Canada Gowanlea is located in the heart of Ontario, Canada. Cows have been milked here by the Smith family for over 50 years. We are located 4 miles South of Sunderland on Highway 12 & 7 between the 2nd and 3rd concession of Brock township. Click here for a map. Phone #' s 705-357-2277 ---- The Farm 705-357-2983 ---- FAX 705-357-3092 ---- R.