sewage treatment

Sewage overflows return as flood water, heavy rains infiltrate lines; exceed treatment plant capacity

Flooding and heavy rains early this month once again forced Bettendorf to pump raw sewage into the Mississippi River.

That's because the Davenport Sewage Treatment Plant wasn't able to handle inflows to the facility and closed gates to the main interceptor along the Mississippi riverfront, requiring Bettendorf to pump sewage from its riverfront lines into storm water pipes that flow into the river.

If the city did not use the pumps, sewage could back up into riverfront businesses and homes.

Davenport/Bettendorf achieve big reductions in sewage overflows; court ordered fixes address dumping of sewage into Mississippi River

Upgrades to the jointly owned Davenport/Bettendorf sewage system over the past four years has led to "marked reductions" in untreated and partially treated sewage being dumped into the Mississippi River during flooding and after heavy rainfalls.

According to the annual report to the Iowa Department of Natural Resources (IDNR) filed April 1, the improvements to the sewage treatment plant and sewage collection systems in the two communities have "reduced sewer backups and overflows.

EPA survey finds $271 billion needed to shore up wastewater and stormwater treatment facilities

A U.S. Environmental Protection Agency (EPA) study says $271 billion is needed to maintain and improve the nation’s wastewater infrastructure, including leaking pipes that carry wastewater to treatment plants, sewage treatment plant technology, and management of stormwater runoff.

Davenport plant discharges 132 million gallons of partially treated sewage into Mississippi River

The amount of partially treated sewage dumped into the Mississippi River by Davenport's Sewage Treatment Plant last month totaled more than 136 million gallons.

The so-called "bypassed" sewage received only primary – not secondary – treatment because flows to the plant on Concord Street were beyond its capacity as storm water runoff infiltrated sewer lines after heavy rains.

As the sewage flows backed up in lines to the treatment plant, Bettendorf pumped more than 29 million gallons of sewage and storm water into the river after the heavy rains in late June and early July.

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