Name: Stormwater points

Display Field: Status

Type: Feature Layer

Geometry Type: esriGeometryPoint

Description: This data was collected and compiled for various towns in watersheds (currently including the Missisquoi Basin, Winooski Basin, Connecticut River Basin, Lamoille River Basin, and the Otter Creek Basin) around Vermont and shows as accurately as possible the stormwater infrastructure within these municipalities. Points were collected using a 2005 Series Trimble GeoXM GPS unit, field data collected by locating the structures on ortho-photos, digitizing of georeferenced town plans and record drawings, the digitizing of state stormwater permit plans, and the knowledge of members of the municipality. The points, lines, and polygons, show the locations and connections of various features of the stormwater infrastructure, as well as some points included for additional information. Drainage systems were mapped using ArcMap 9, 9.3.1 and 10 to establish the connectivity of the stormwater features, and to show where runoff from impervious surfaces in various subwatersheds within an urbanized area eventually enters the receiving water. Subwatershed boundaries were drawn using field data, topographic maps, and a Digital Elevation Models (DEM). Using an impervious surface layer, which was created in different ways for different urbanized areas, the subwatersheds were then prioritized by the percentage of impervious within each subwatershed as well as how directly connected that impervious surface was to the outfall. Retrofit stormwater treatment best management practices and locations were suggested for the highest priority subwatersheds, where feasible, in order to treat the runoff before it enters the receiving water.

Copyright Text:

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Name: Culvert inlet
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Last Edit Date: 5/20/2019 3:34:37 PM

Schema Last Edit Date: 5/20/2019 3:34:37 PM

Data Last Edit Date: 5/20/2019 3:34:37 PM

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