Combined sewer overflow


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Combined sewer overflow

A combined sewer system conveys both sanitary sewage and stormwater in one piping system. During normal dry weather conditions, sanitary wastewater collected in the combined sewer system is diverted to the wastewater treatment plant before it enters natural waterways. During periods of significant rainfall, the capacity of a combined sewer may be exceeded. When this occurs, excess flow, a mixture of stormwater and sanitary wastewater, is discharged at CSO points, typically to rivers and streams. Release of this excess flow is necessary to prevent flooding in homes, basements, businesses, and streets.
References in periodicals archive ?
The mandated federal and state projects for Worcester over the next five years are: Upper Blackstone 2008 discharge permit, $208 million; EPA stormwater permit, $950 million; EPA combined sewer overflow permit, $5 million; dam maintenance, $9 million; sustainable water management initiative, $5 million; and sanitary sewer system upgrades, $14 million.
A valuable knowledge resource for stormwater utilities that includes elements of how to address combined sewer overflows and data related to billing consumers was released today.
5 billion in public debt, with Citizens Energy Group assuming all assets and liabilities including the consent decree for the abatement of combined sewer overflows, said Dan Considine, Citizens manager of corporate communications.
6 billion Clean Rivers Project aims to nearly eliminate combined sewer overflows to the Anacostia and Potomac rivers and Rock Creek, also improving the health of the Chesapeake Bay.
Work in Neville's Cross, which will begin on October 25 and be completed by the end of March, will involve constructing 427 metres of new sewer pipe along sections of Lowes Barn Bank and Neville's Cross Bank and building a combined sewer overflow.
They are to build a combined sewer overflow chamber beneath the road and the work is expected to last five weeks.
Major components include reconstruction of historic bulkhead walls, the creation of mooring facilities for Great Lakes cruise vessels, the recreation of a historic bridge, and the demolition and relocation of a combined sewer overflow outfall.
5 billion over two years for sanitary and combined sewer overflow projects and $45 million in grants for wet weather watershed pilot programs.
The Heliscreen system will be used as part of a combined sewer overflow (CSO) mitigation project at Farmington's East Treatment Plant.
Tenders are invited for Professional Services to Develop 2018 Combined Sewer Overflow Long Term Control Plan Update
Under the settlement, the MWRD will work to complete a tunnel and reservoir plan to increase its capacity to handle wet weather events and address combined sewer overflow discharges.
The four-month scheme involves building a new combined sewer overflow and new sewers.
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