client: Cochrane Public Utilities Commission
location: Town of Cochrane, Ontario
project description: R.V. Anderson Associates Limited (RVA) performed a Class Environmental Assessment, including an examination of source alternatives, and a treatability study on the selected alternative. The new water treatment plant was designed to replace an existing water treatment plant constructed circa 1940, and to provide capacity for anticipated increase in population from 4500 to 6000 people. The water treatment plant was designed to remove high iron, manganese, and hardness present in the raw water supplied by three 3 920 m³/d (600 IGPM) capacity wells. "Lime Softening" was the selected process. The plant was the first in Ontario to use "Claricone" clarifiers. The plant also included a recarbonation tank for pH adjustment, two dual media filter, a two cell inground clear well/reservoir (2300 m³ capacity) and three 83.4 L/s capacity high-lift pumps.
Some special features include an inground backwash equalization tank (495 m³ capacity) that allows backwash water recycling and a residue management based on thickening and dewatering of the sludge and backwash water in three concrete lagoons (2 100 m³ capacity each). The plant design incorporated a complete SCADA control system, operations manual. RVA also provided operator training.
project status:
Project completed for a construction cost of $6.67 million. |
