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The Stormwater Features Inventory Database (SFID) was developed in response to WSDOT’s 2009 NPDES Municipal Stormwater Permit, issued by the Washington State Department of Ecology. Among other elements, the permit requires WSDOT to maintain an ongoing storm sewer system mapping program for areas within the permit’s jurisdictional boundaries. |
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The Stormwater Features Inventory Database (SFID) was developed in response to WSDOT’s 2009 NPDES Municipal Stormwater Permit, issued by the Washington State Department of Ecology. Among other elements, the permit requires WSDOT to maintain an ongoing storm sewer system mapping program for areas within the permit’s jurisdictional boundaries. |
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WSDOT ESO |
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description:
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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN><SPAN>This feature class contains WSDOT’s stormwater energy dissipators. An energy dissipator is a </SPAN></SPAN><SPAN><SPAN>method to reduce the total energy of flowing water; a mechanism that reduces velocity prior to or at discharge from an outfall in order to prevent erosion (see </SPAN></SPAN><A href="http://www.wsdot.wa.gov/publications/manuals/fulltext/M23-03/Chapter3.pdf"><SPAN STYLE="font-style:italic;"><SPAN>Hydraulics Manual</SPAN></SPAN></A><SPAN><SPAN>, Section 3-4.7</SPAN></SPAN><SPAN STYLE="font-style:italic;"><SPAN>;</SPAN></SPAN><SPAN><SPAN>see also </SPAN></SPAN><A href="http://www.fhwa.dot.gov/engineering/hydraulics/pubs/06086/hec14.pdf"><SPAN STYLE="font-style:italic;"><SPAN>FHWA Hydraulic Engineering Circular No. 14</SPAN></SPAN></A><SPAN><SPAN>). The WSDOT Stormwater Features Inventory Database should not document energy dissipators unless they occur at or near the end of a stormwater system, immediately prior to discharge.</SPAN></SPAN><SPAN><SPAN>The majority of the data collected so far are within the Phase I and Phase II 2009 NPDES Municipal Stormwater Permit Areas.</SPAN></SPAN></P></DIV></DIV></DIV> |
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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>None</SPAN></P></DIV></DIV></DIV> |
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title:
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WSDOT Stormwater Energy Dissipators |
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en-US |
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