The lawsuit alleges that the Metropolitan Sewer District's failure to maintain the River Des Peres made it impossible for the system to handle what amounted to predictable heavy rain. The floods were the result of the remnants of Hurricane Ike.
The Metropolitan Sewer District says it plans to appeal a July court ruling that threw out a new system for charging for stormwater system maintenance.
The new fee charged people based on how much of their property could not absorb water. But Lincoln County judge Dan Dildine ruled that it was actually a tax, and therefore had to be approved by voters.