Disadvantages of Underground Transmission over Overhead Transmission. 1  Underground transmission line cable is costlier than overhead transmission. 2  The maintenance cost of underground cables is higher than over head transmission. 3  Capital cost of Overhead Transmission lines are cheaper than underground transmission line.
the average annual rainfall for Canada is 60.33 cm. That is alot! Any average is going to be a meaningless because Canada covers over 9 million sq/kms, extending from the Nor â¦ th Pole to below the 49th parallel and both east and west coasts of North America.
The average annual rainfall / precipitation in Quebec City is 115 cm / 44 inches, and the average annual snowfall is around 350 cm / 138 inches.eld each July, the Quebec City Summer Festival is one of the seasonal highlights. The trees begin to color up and a chill fills the air when autumn arrives in Quebec City. Temperatures in October drop to around 10Â°C / 50Â°F, with occasional snowy weather.