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.s with most cities in Canada, the weather and climate in Quebec City varies dramatically season by season, with hot and humid summers contrasting with Quebec City's cold, snowy weather during the winter months.