{ "culture": "en-US", "name": "", "guid": "", "catalogPath": "", "snippet": "The Western Washington Stormwater Management Manual allows local governments to adopt a flow control standard that requires land development projects to match high flow durations that are produced by the existing land cover condition. As pre-requisite to allowing that standard, the manual recommends that the drainage area of the immediate stream and all subsequent downstream basins must have had at least 40% total impervious area since 1985. To help implement this option, the Department of Ecology has produced a map that displays the basins in western Washington within which development projects qualify for this lower flow control standard.", "description": "

The shapefile displays those basins within which development projects qualify for using the existing land cover condition as the stormwater flow control default target. This is a lower flow control default target than the target used for most of western Washington, which is based upon use of the historic land cover condition.<\/SPAN><\/P><\/DIV><\/DIV><\/DIV>", "summary": "The Western Washington Stormwater Management Manual allows local governments to adopt a flow control standard that requires land development projects to match high flow durations that are produced by the existing land cover condition. As pre-requisite to allowing that standard, the manual recommends that the drainage area of the immediate stream and all subsequent downstream basins must have had at least 40% total impervious area since 1985. To help implement this option, the Department of Ecology has produced a map that displays the basins in western Washington within which development projects qualify for this lower flow control standard.", "title": "Western Washington Land Cover Change Analysis Project - Basins 1986", "tags": [ "Washington State Department of Ecology", "ECY", "Water Quality Program", "IBM", "imageryBaseMapsEarthCover", "control", "basin", "Washington", "stormwater", "northwest", "landcover", "flow" ], "type": "", "typeKeywords": [], "thumbnail": "", "url": "", "minScale": 150000000, "maxScale": 5000, "spatialReference": "", "accessInformation": "Sanborn Mapping Solutions", "licenseInfo": "

No use constraints exist at this time.<\/SPAN><\/P><\/DIV><\/DIV><\/DIV>", "portalUrl": "" }