Connecticut MS4 Supporting Layers


Layer Information | Class Descriptions


Layer Information

CT 2012 Impervious Surface   Metadata Download Map Service, Map Service State Plane
CT 2016 Stormwater Impaired Waters (Rivers, Lakes, Estuaries) Data Guide Metadata   Map Service: CT2016 Impaired Rivers, CT2016 Impaired Lakes, CT2016 Impaired Estuary
CT DEEP Basins with 2012 Impervious Stats Data Guide Metadata Download Map Service: Impervious Cover by Watershed Basin
CT Towns with 2012 Impervious Stats Data Guide Metadata   Map Service: Impervious Cover by Town
MS4 Urbanized Area   Metadata   Map Service: Urbanized Area
MS4 Towns   Metadata   Map Service: MS4 Towns
CT 2012 Buildings -   Download Map Service: Buildings
CT 2012 Roads (polygon) -   Download Map Service: Roads
CT 2012 Other Impervious -   Download Map Service: Other Impervious


Impervious Surfaces Classes

1 Buildings Permanent structures larger than 800 square feet.
I. Buildings and structures and greenhouses >800 square feet.
II. Excludes temporary structures such as mobile storage units.
III. Include mobile homes, structures under construction.
IV. All buildings completed or under construction, contained in the imagery will be captured. Buildings will be delineated to the maximum degree possible from the imagery.
2 Roads Any vehicular cart way including, but not limited to alleyways, paved roadways, bridges and tunnels and private roads within commercial, industrial, institutional, and residential complexes.
I. Road to edge of pavement including gravel shoulder.
II. Gravel roads.
III. All transportation routes that are hard paved to loose gravel.
IV. Driveways are excluded from this class.
3 Other Impervious Driveways, parking lots, and impervious features that are not vehicular cart ways such as sidewalks.
I. All paved or heavily compacted areas not included in roads class.
II. Bare soil is generally not considered impervious even when it is in a driveway situation.
III. Included are parking lots, sidewalks, driveways, patios, swimming pools (in-ground and above-ground), pool decks, park walkways, concrete pads.
IV. Excluded are grass, water, forest when not covering impervious, wetlands, bare soil (even when compacted), railways, baseball fields, running tracks and green roofs.