Storm sewer pipes can be as small as 10 or 12 inches in diameter. But the pipes can also be bigger than 8 feet from top to bottom.
The pipe size depends on how much water is expected to move through the storm sewer. If the storm sewer catches rainwater coming from a large chunk of land, the pipe needs to be big.
The biggest storm sewer pipes are shaped like rectangular tubes. They’re called “box culverts.” Some of the biggest pipes are placed side-by-side to carry even more water.
Some storm sewer pipes can be as small as 12 inches in diameter. However, sewer pipes can also be larger than a man, as you see here.
Photo: Chicago Public Library