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.
Located in a sub-Mediterranean zone, Victoria, British Columbia boasts the mildest climate in Canada and the driest summers. Victoria receives an average of 308 clear days each year and, contrary to popular belief about the region, only 66.5 cm (26.2) of rain. How does this compare?