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.
According to the Census geographic units of Canada, the city has a total area of 464.01 km2 (179.16 sq mi) and an elevation of 240 m (786 ft). The city has a humid continental climate with wide temperature contrasts between winter and summer, and greater precipitation in summer.