What causes a public storm sewer main backup?

Public or mainline storm sewer backups can be caused by a number of factors. Heavy or intense rainfall events can overwhelm the storm sewer system. The majority of storm sewers in Shaker Heights were designed and installed between 1910 and 1920. They are designed to handle a 5-year or 10-year rain storm event. For rainstorm events greater than a 10-year storm, the storm sewers will overflow. 


A blockage in the main sewer line may be caused by breaks in the pipe, an intrusion of tree roots, or downstream restrictions. Grass clippings, leaves, branches, newspapers and trash that enter the storm drain can also cause blockage. Shaker Heights Codified Ordinance prohibits any person from putting paper, wood, stone, or other foreign objects into the storm sewer system. The primary source of the foreign objects is the street catch basins.

Show All Answers

1. What causes a public sanitary sewer main backup?
2. What causes a private sanitary sewer lateral backup?
3. What causes a public storm sewer main backup?
4. What causes a private storm sewer lateral backup?
5. How do the footer drains work?
6. What causes footer drain backups?
7. Should I install a backwater prevention valve?
8. Should I consider a special rider added to my homeowner's or renter's insurance policy?
9. What are resident responsibilities?
10. What are City responsibilities?
11. What if a problem occurs?
12. Should I use copper sulfate?
13. Is there a list of contractors licensed with the City?
14. Whom should I call for help?