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For better understanding this layer was renamed from Storm Sewer System to Combined Sewer (CSS) Sewershed .The dataset contains locations and attributes of combined sewer system sewersheds within the DC Water jurisdiction. There are small areas within this dataset, between regulators/interceptors and the outfalls, that primarily serve as storm sewersheds. Combined flow should enter these areas only when it overflows from the interceptors. This data layer does not consider overlaps with the MS4 areas and where additional MS4 separations has taken place. |
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For better understanding this layer was renamed from Storm Sewer System to Combined Sewer (CSS) Sewershed .The dataset contains locations and attributes of combined sewer system sewersheds within the DC Water jurisdiction. There are small areas within this dataset, between regulators/interceptors and the outfalls, that primarily serve as storm sewersheds. Combined flow should enter these areas only when it overflows from the interceptors. This data layer does not consider overlaps with the MS4 areas and where additional MS4 separations has taken place. |
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Department of Energy and Environment |
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5000 |
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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>DC Water operates a wastewater collection system comprised of "separate" and "combined" sewers. Approximately two-thirds of the District is served by a separate sewer system, while the remaining one-third is served by combined sewers. A combined sewer system conveys both sanitary sewage and storm water in one piping system. The District's combined sewer system was developed before 1900. Separate systems are comprised of two independent piping systems: one system for "sanitary" sewage (i.e., sewage from homes and businesses) and one system for storm water. During normal, dry weather conditions: Sanitary wastes collected in the combined sewer system are diverted to Blue Plains at facilities called regulators or dams. Typically, there are no overflows to the District's rivers and creeks. During periods of rainfall, the capacity of a combined sewer may be exceeded. When this occurs, regulators are designed to let the excess flow, which is a mixture of stormwater and sanitary wastes, be discharged directly into the District's rivers and creeks. This excess flow is called combined sewer overflow or CSO. Release of this excess flow is necessary to prevent flooding in homes, basements, businesses, and streets. CSO's are discharged to the Anacostia River, Rock Creek, Potomac River, or tributary waters at CSO outfalls during most moderate rain events.</SPAN></P></DIV></DIV></DIV> |
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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This work is licensed under a </SPAN><A href="https://creativecommons.org:443/licenses/by/4.0/" STYLE="text-decoration:underline;"><SPAN>Creative Commons Attribution 4.0 International License</SPAN></A><SPAN>.</SPAN></P></DIV></DIV></DIV> |
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Combined Sewer (CSS) Sewershed |
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["storm sewer system","water","rain","emergency","washington dc","district of columbia","dc","DOEE","DC Water"] |
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en-US |
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150000000 |
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