Description: CT Wild and Scenic Rivers is a 1:24,000 scale line feature layer that depicts the designated Wild & Scenic Rivers in Connecticut. The National Wild and Scenic Rivers System was created by Congress in 1968 (Public Law 90-542; 16 U.S.C. 1271 et seq.) to preserve certain rivers with outstanding natural, cultural and recreational values in a free-flowing condition for the enjoyment of present and future generations. There are two Wild & Scenic Rivers in Connecticut, a secttion of the Farmington River and a section of the Eightmile River. Both are managed by the National Park Service (NPS). The Act provides three levels of protection: wild, scenic, and recreational. Wild rivers are free of dams, generally inaccessible except by trail, and represent vestiges of primitive America. Scenic rivers are free of dams, with shorelines or watersheds still largely primitive and shorelines largely undeveloped, but accessible in places by roads. Recreational rivers are readily accessible by road or railroad, may have some development along their shorelines, and may have been dammed in the past.
Description: Connecticut 305b Assessed River 2016 is a1:24,000-scale, line feature-based layer that includes rivers that have been assessed to comply with Sections 305(b) and 303(d) of the federal Clean Water Act. Section 305(b) of the Clean Water Act requires each state to monitor, assess and report on the quality of its waters relative to attainment of designated uses established by the State's water quality standards.
Impaired waterbodies are those classified as Not Supporting a designated use.
Description: This layer is a subset the Connecticut Hydrography Line data layer. It includes only the water, shore, drainage ditch and intermittent water features.
Connecticut Hydrography Line includes the line features of a layer named Hydrography. Hydrography is a 1:24,000-scale, polygon and line feature-based layer that includes all hydrography features depicted on the U.S. Geological Survey (USGS) 7.5 minute topographic quadrangle maps for the State of Connecticut. This layer only includes features located in Connecticut. These hydrography features include waterbodies, inundation areas, marshes, dams, aqueducts, canals, ditches, shorelines, tidal flats, shoals, rocks, channels, and islands. Hydrography is comprised of polygon and line features. Polygon features represent areas of water for rivers, streams, brooks, reservoirs, lakes, ponds, bays, coves, and harbors. Polygon features also depict inundation areas, marshes, dams, aqueducts, canals, tidal flats, shoals, rocks, channels, and islands shown on the USGS 7.5 minute topographic quadrangle maps. Line features represent single-line rivers and streams, aqueducts, canals, and ditches. Line features also enclose all polygon features in the form of natural shorelines, manmade shorelines, dams, closure lines separating adjacent waterbodies, and the apparent limits for tidal flats, rocks, and areas of marsh. The layer is based on information from USGS topographic quadrangle maps published between 1969 and 1984 so it does not depict conditions at any one particular point in time. Also, the layer does not reflect recent changes with the course of streams or location of shorelines impacted by natural events or changes in development since the time the USGS 7.5 minute topographic quadrangle maps were published. Attribute information is comprised of codes to identify hydrography features by type, cartographically represent (symbolize) hydrography features on a map, select waterbodies appropriate to display at different map scales, identify individual waterbodies on a map by name, and describe feature area and length. The names assigned to individual waterbodies are based on information published on the USGS 7.5 minute topographic quadrangle maps or other state and local maps. The layer does not include bathymetric, stream gradient, water flow, water quality, or biological habitat information. This layer was originally published in 1994. The 2005 edition includes the same water features published in 1994, however some attribute information has been slightly modified and made easier to use. Also, the 2005 edition corrects previously undetected attribute coding errors.
Description: The Flood Insurance Rate Map (FIRM) is the basis for floodplain management, mitigation, and insurance activities for the National Flood Insurance Program (NFIP). Digital Flood Insurance Rate (DFIRM) maps include location and attributes for Flood Insurance Risk Zones (FLD_HAZ_AR) shown on available for five Connecticut counties, Fairfield, Hartford, Middlesex, New London and New Haven. This layer does not include information for Litchfield, Tolland or Windham counties.
Description: The Coastal Boundary layer is 1:24,000-scale data. It shows the extent of lands and coastal waters as defined by C.G.S. 22a-93(5) within Connecticut's coastal area (defined by C.G.S. 22a-94(c)). Use this layer to show the Coastal Boundary on maps with other 1:24,000-scale data such as Coastal Area, Town Boundaries, Roads and Trails, Airports, Railroads and other base map data derived from the USGS 7.5 Minute Quadrangle Maps and compiled at a 1:24,000 scale. Not intended for maps printed at map scales greater or more detailed than 1:24,000 scale (1 inch = 2,000 feet.)
Description: The Coastal Area layer is 1:24,000-scale data. It depicts the location of the Connecticut Coastal Area as defined by Connecticut General Statute C.G.S. 22a-94(a). Use this layer to show the Coastal Area. Use this layer with other 1:24,000-scale map data such as the Coastal Boundary, Town Boundaries, Roads and Trails, Airports, Railroads and other base map data derived from the USGS 7.5 minute topographic quadrangle maps and compiled at a 1:24000 scale. Not intended for maps printed at map scales greater or more detailed than 1:24,000 scale (1 inch = 2,000 feet.)
Description: Tidal Wetlands 1990's is 1:12,000-scale data. Use this layer to depict the location of tidal wetlands as they existed in the 1990's. Not intended for maps printed at map scales greater or more detailed than 1:12,000 scale (1 inch = 1,000 feet.)
'Tidal Wetlands' are defined as follows: 'Tidal Wetlands' means 'wetland' as defined by C.G.S.Sec. 22a-29. C.G.S.Sec.22a-93(7)(E). 'Wetland' means those areas which border or lie beneath tidal waters, such as, but not limited to banks, bogs, salt marshes, swamps, meadows, flats, or other low lands subject to tidal action, including those areas now or formerly connected to tidal waters, and whose surface is at or below an elevation of one foot above local extreme high water; and upon which may grow or be capable of growing some but not necessarily all, of the following: (See the statute for a complete listing of tidally influenced plant species) C.G.S.Sec.22a-29(2). The area mapped in the Tidal Wetlands 1990's datalayer includes all tidal, coastal and navigable waters and tidal wetlands of Connecticut with the exception of the Lower Connecticut River, which was mapped as part of the 1994 Ramsar Convention program. Between both programs, a total of 15,178 acres of tidal wetlands were mapped.
Description: Aquifer Protection Areas is 1:24,000-scale data. It depicts the location of regulated aquifer protection areas. The final mapping will define the regulatory boundaries for the land use regulations. Land use controls will be imposed in those areas to minimize the potential for contamination of the well field. Use this layer with other 1:24,000-scale map data such as base map data, high risk activities and surficial material. Not intended for maps printed at map scales greater or more detailed than 1:24,000 scale (1 inch = 2,000 feet.)
Description: The Natural Diversity Database Areas is 1:24,000-scale data. It depicts the approximate locations of state and federal listed species and significant natural communities. This data is intended to be used as a pre-screening tool to identify potential impacts to sensitive species. The data may also be used to target areas of potential conservation interest. More information can be obtained by submitting written environmental review request to the Natural Diversity Database. Not intended for maps printed at map scales greater or more detailed than 1:24,000 scale (1 inch = 2,000 feet.)
Description: Mapping Potential Environmental Justice Areas - As part of its plan to address the issue of Environmental Justice, EPA New England has developed maps of areas with large low- income and/or minority populations. To be considered a large population, a given Census block group must rank in the top 15% of the region for percentage minority and/or low- income. Low- income is defined as twice the Federal Poverty Level.
Description: Connecticut 305b Assessed Lake 2016 is a 1:24,000-scale, polygon feature-based layer that includes lakes that have been assessed in compliance with Sections 305(b) and 303(d) of the federal Clean Water Act. Section 305(b) of the Clean Water Act requires each state to monitor, assess and report on the quality of its waters relative to attainment of designated uses established by the State's water quality standards.
Impaired waterbodies are those classified as Not Supporting a designated use.
Description: Connecticut 305b Assessed Estuary 2016 is a 1:24,000-scale, polygon feature-based layer that includes lakes that have been assessed in compliance with Sections 305(b) and 303(d) of the federal Clean Water Act. Section 305(b) of the Clean Water Act requires each state to monitor, assess and report on the quality of its waters relative to attainment of designated uses established by the State's water quality standards.
Impaired waterbodies are those classified as Not Supporting a designated use.
Description: Connecticut Drainage Basins is 1:24,000-scale, polygon and line feature data that define natural drainage areas in Connecticut. These are small basin areas that average approximately 1 square mile in size and make up, in order of increasing size, the larger local, subregional, regional, and major drainage basin areas. Connecticut Drainage Basins includes drainage areas for all Connecticut rivers, streams, brooks, lakes, reservoirs and ponds published on 1:24,000-scale 7.5 minute topographic quadrangle maps prepared by the USGS between 1969 and 1984. Data is compiled at 1:24,000 scale (1 inch = 2,000 feet). This information is not updated. Polygon and line features represent drainage basin areas and boundaries, respectively. Each basin area (polygon) feature is outlined by one or more major, regional, subregional, local, impoundment, or river reach boundary (line) feature. These data include 7,076 basin area (polygon) features and 20,945 basin boundary (line) features. Basin area (polygon) attributes include major, regional, subregional, local, (full) basin number, and feature size in acres and square miles. The full basin number (BASIN_NO) uniquely identifies individual basins and is up to 13 characters in length. There are 7,031 unique basin numbers. Examples include 6000-00-1+*, 4300-00-1+L1, and 6002-00-2-R1. The first digit (column 1) designates the major basin, the first two digits (columns 1-2) designate the regional basin, the first 4 digits (columns 1-4) designate the subregional basin, and the first seven digits (columns 1-7) designate the local basin. Note, there are slightly more basin polygon features (7,076) than unique basin numbers (7,031) primarily because a few water supply watershed boundaries split a basin into two polygon features at the location of a small dam or point of diversion along a stream. Basin boundary (line) attributes include a drainage divide type attribute (DIVIDE) used to cartographically represent the hierarchical drainage basin system. This divide type attribute is used to assign different line symbology to major, regional, subregional, local, stream reach, and lake impoundment drainage basin divides. For example, major basin drainage divides are more pronounced and shown with a wider line symbol than regional basin drainage divides. Connecticut Drainage Basins is the data source for other digital spatial data including the Connecticut Major Drainage Basins, Connecticut Regional Drainage Basins, Connecticut Subregional Drainage Basins, and Connectcut Local Drainage Basins.
Description: This Hydrography Poly layer is a subset of the Connecticut Hydrography layer. It includes only the water and intermittnet water features.
Connecticut Hydrography Polygon includes the polygon features of a layer named Hydrography. Hydrography is a 1:24,000-scale, polygon and line feature-based layer that includes all hydrography features depicted on the U.S. Geological Survey (USGS) 7.5 minute topographic quadrangle maps for the State of Connecticut. This layer only includes features located in Connecticut. These hydrography features include waterbodies, inundation areas, marshes, dams, aqueducts, canals, ditches, shorelines, tidal flats, shoals, rocks, channels, and islands. Hydrography is comprised of polygon and line features. Polygon features represent areas of water for rivers, streams, brooks, reservoirs, lakes, ponds, bays, coves, and harbors. Polygon features also depict inundation areas, marshes, dams, aqueducts, canals, tidal flats, shoals, rocks, channels, and islands shown on the USGS 7.5 minute topographic quadrangle maps. Line features represent single-line rivers and streams, aqueducts, canals, and ditches. Line features also enclose all polygon features in the form of natural shorelines, manmade shorelines, dams, closure lines separating adjacent waterbodies, and the apparent limits for tidal flats, rocks, and areas of marsh. The layer is based on information from USGS topographic quadrangle maps published between 1969 and 1984 so it does not depict conditions at any one particular point in time. Also, the layer does not reflect recent changes with the course of streams or location of shorelines impacted by natural events or changes in development since the time the USGS 7.5 minute topographic quadrangle maps were published. Attribute information is comprised of codes to identify hydrography features by type, cartographically represent (symbolize) hydrography features on a map, select waterbodies appropriate to display at different map scales, identify individual waterbodies on a map by name, and describe feature area and length. The names assigned to individual waterbodies are based on information published on the USGS 7.5 minute topographic quadrangle maps or other state and local maps. The layer does not include bathymetric, stream gradient, water flow, water quality, or biological habitat information. This layer was originally published in 1994. The 2005 edition includes the same water features published in 1994, however some attribute information has been slightly modified and made easier to use. Also, the 2005 edition corrects previously undetected attribute coding errors.
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Description: Connecticut Town Index is a 1:125,000-scale polygon feature-based layer that includes a polygon feature for every Connecticut town (municipality). There are 169 town polygon features in this layer. The corresponding town number and town name attributes uniquely identify town polygon features. Town number values are based on the Town Codes issued by the State of Connecticut, Office of the State Controller, which range from 1 to 169.