Storm water run-off makes routine maintenance of storm drains and the continual process of storm drain cleaning necessary. It can help keep a minor issue from turning into a large problem. As you can see from these pictures, there are many circumstances which can lead to a clogged drain. During heavy rain or snow melt you need the drains free and clear of debris so they don't back up onto the roadways; many of the issues shown here could have been prevented by regular maintenance.