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  "Title": "Connecticut Drainage Basins",
  "Author": "",
  "Comments": "A standardized mapping of natural drainage basins in Connecticut was completed in 1981 by the then Connecticut Department of Environmental Protection (DEP). This drainage basin system divided Connecticut into 8 major basins, 45 regional basins, 337 subregional basins, 2,898 local basins, and 7,067 small drainage basin areas. The statewide mapping of natural drainage basins established a hierarchical system of basins based on drainage area size with large major basins subdivided into regional basins, regional basins subdivided into subregional basins, subregional basins subdivided into local basins, and local basins subdivided into smaller and more numerous drainage basin areas. Connecticut Drainage Basins is the most detailed delineation of natural drainage basins available on a statewide basis for Connecticut. It includes watersheds for Connecticut rivers, streams, brooks, lakes, reservoirs and ponds included on 1:24,000-scale 7.5 minute topographic quadrangle maps published by the U.S. Geological Survey (USGS) between 1969 and 1984. These basin units include smaller watersheds that drain into many of the small streams and ponds in Connecticut. These basin areas are the building blocks for the larger local, subregional, regional and major drainage basins defined by DEP.\n\nConnecticut Drainage Basins includes 7,067 drainage basin areas with an average size of approximately 1 square mile and make up, in order of increasing size the larger local, subregional, regional, and major drainage basin areas. Each drainage basin is assigned a full basin number (BASIN_NO) that uniquely identifies each basin. There are 7,031 unique basin numbers, and length of the number can be up to 13 characters long, depending on stream order of the basin. 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. The basin number includes a few codes at the end. An asterisk sign (*) denotes a headwater basin containing a delineated impoundment into which a delineated drainage basin outlets. The letter L (for lake) denotes a reach-impoundment identifier for an impoundment basin and is followed by the reach-impoundment number. The letter R (for reach) denotes a reach-impoundment identifier for a stream reach basin and is followed by the reach-impoundment number. \n\nIncluded with the local and  subregional drainage basin boundaries are Local or Subregional Drainage Basins Direction arrows that depict the general direction of surface water flow towards indivicual drainage basin outlets. Theses arrows are meant to indicate where one basin drains into another and are intended aid in visualizing the network of drainage basins in Connecticut. They do not depict the exact location of basin outlets.",
  "Subject": "Drainage basins are comprised of a set of polygon and line features that together describe different types of drainage basins and drainage basin divides.",
  "Category": "",
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  "Keywords": "Drainage Basin,Watershed,Connecticut"
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