State of Connecticut, Department of Environmental Protection (data compiler, editor and publisher)1988Connecticut Subregional Drainage Basin Town Intersect2006vector digital dataHartford, Connecticut, USAState of Connecticut, Department of Environmental ProtectionThe State of Connecticut, Department of Environmental Protection is the collector of the data (compiler), the creator and maintainer of the data layer (editor), and producer (publisher) of this information for use. This data is not updated. Source map scale is 1:24,000.http://www.ct.gov/deepMarianne McElroy, State of Connecticut, Department of Environmental Protection, Natural Resources Center1981Natural Drainage Basins in ConnecticutmapConnecticut Natural Resources Atlas SeriesDrainage Basins MapHartford, Connecticut, USAState of Connecticut, Department of Environmental ProtectionThe Natural Drainage Basins in Connecticut map is published by the State of Connecticut, Department of Environmental Protection, Natural Resources Center in cooperation with the U.S. Geological Survey. The map was funded in part by the Water Resources Council. Map scale 1:125,000.http://cteco.uconn.edu/map_catalog/maps/state/Natural_Drainage_Basins_In_Connecticut.pdfhttp://cteco.uconn.edu/map_catalog/maps/state/Natural_Drainage_Basins_In_Connecticut_250K.pdfConnecticut Subregional Drainage Basin Town Intersect is 1:24,000-scale data that is the geographic intersection of subregional drainage basins and towns in Connecticut. It includes polygon features that define where the Connecticut Subregional Drainage Basin Poly and Connecticut Town Polygon layers intersect and overlap each other. The geographic area covered includes the Connecticut mainland and islands along the Connecticut coastline. The total geographic area covered by all polygon features is 4,967.56 square miles. Data is compiled at 1:24,000 scale (1 inch = 2,000 feet). This is static information that is not updated.
Polygon feature attributes include basin number and name, town number and name, and feature size in acres and square miles. Each polygon feature includes the 1-digit major (MBAS_NO), 2-digit regional (RBAS_NO), 4-digit subregional (SBAS_NO) drainage basin number, and the Connecticut Town number (TOWN_NO). Subregional drainage basins typically are located in more than one town and a town will include more than one basin. A polygon feature exists for each subregional basin - town occurrence.
Connecticut Subregional Drainage Basin Town Intersect is derived from the intersection of the geometry and attributes of the Connecticut Subregional Drainage Basins for Clipping and Connecticut Town Polygon feature classes.These data are used for geoprocessing and analysis purposes. They function as a two-way index of basins and towns, identifying the towns each subregional drainage basin is located in as well as identifying the subregional drainage basins located in each town. A town can be analyzed relative to basins, or a basin can be analyzed relative to towns. A polygon feature exists for each area where a subregional basin overlaps a town. If a basin is located in two different parts of town, a polygon feature will exist for each. Polygon feature size is available in square miles or acres so basin occurrence as a percent of town area can be determined.
These data are intended for analysis with other digital data compiled at 1:24,000 scale or greater.A standardized mapping of natural drainage basins in Connecticut was completed in 1981 by the Connecticut Department of Environmental Protection. 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. Major basins are subdivided into regional basins. Regional basins are subdivided into subregional basins. Subregional basins are subdivided into local basins. Local basins are subdivided into smaller drainage basin areas for impoundments and river reaches.
A pair of 1:24,000-scale polygon and line feature classes is available for all basin levels. These data are named Connecticut Major Basins, Connecticut Regional Basins, Connecticut Subregional Basins, Connecticut Local Basins, and Connecticut Drainage Basins. Connecticut Drainage Basins includes the most detailed information upon which the other basin datasets are based.
A hierarchical drainage basin number was assigned to uniquely identify drainage basin areas. Drainage basin areas are numbered sequentially beginning upstream and proceeding downstream. The first digit (column 1) identifies the major basin, the first two digits (columns 1-2) identify the regional basin, the first 4 digits (columns 1-4) identify the subregional basin, and the first seven digits (columns 1-7) identify the local basin. Below are examples of the hierarchical drainage basin numbers.
Basin Numbers:
4 = Major drainage basin number, MBAS_NO (column 1)
43 = Regional drainage basin number, RBAS_NO (columns 1-2)
4302 = Subregional drainage basin number, SBAS_NO (columns 1-4)
4302-04 = Local drainage basin number, LBAS_NO (columns 1-7)
4302-04-1-R12 = Basin drainage identification number, BASIN_NO (columns 1-13)
Stream Order (column 9):
4304-00-1 = Stream order value of 1 represents a headwater basin.
4304-00-2 = Stream order value > 1 denotes the complexity of the drainage basin morphology.
Mapping Status Element (column 10):
4302-00-2- = Ending with minus sign (-) denotes detail mapping at 1:24,000 scale for entire basin.
4302-00-2+ = Ending with plus sign (+) denotes detailed mapping not performed at 1:24,000 scale for the entire drainage basin. The Stream Order value will not reflect the complexity of the drainage basin morphology.
4302-00-1* = Ending with asterisk sign (*) denotes a headwater basin containing a delineated impoundment into which a delineated drainage basin outlets.
Reach-Impoundment Identifier (column11) and Number (column 12-13):
4302-00-1-L1 = The value for the Reach-Impoundment Identifier for an impounment basin is L (for lake). It is followed by the Reach-Impoundment Number (1).
4302-04-1-R12 = The value for the Reach-Impoundment Identifier for a stream reach basin is R (for reach). It is followed the Reach-Impoundment Number (12).1988publication dateNone planned-73.742172-71.78136542.05261240.979708Nonedrainage basindrainage areawatershedbasin dividemajorregionalsubregionallocalgazetteer politcal boundarystatetownmunicipalityISO 19115 Topic CategoryboundarieselevationinlandWatersU.S. Department of Commerce, 1987, Codes for the Identification of the States, the District of Columbia and the Outlying Areas of The United States, and Associated Areas (Federal Information Processing Standard 5-2): Washington, DC, National Institute of Standards and Technology.United StatesConnecticutCTU.S. Department of Commerce, 1995, Countries, Dependencies, Areas of Special Sovereignty, and Their Principal Administrative Divisions (Federal Information Processing Standard (FIPS) 10-4): Washington, D.C., National Institute of Standards and Technology.United States of AmericaUSANone. The data is in the public domain and may be redistributed.No restrictions or legal prerequisites for using the data. The data is suitable for use at appropriate scale, and is not intended for maps printed at scales greater or more detailed than 1:24,000 scale (1 inch = 2,000 feet). Although this data set has been used by the State of Connecticut, Department of Environmental Protection, no warranty, expressed or implied, is made by the State of Connecticut, Department of Environmental Protection as to the accuracy of the data and or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the State of Connecticut, Department of Environmental Protection in the use of these data or related materials. The user assumes the entire risk related to the use of these data. Once the data is distributed to the user, modifications made to the data by the user should be noted in the metadata. When printing this data on a map or using it in a software application, analysis, or report, please acknowledge the State of Connecticut, Department of Environmental Protection as the source for this information. For example, include the following data source description when this layer is used in analysis or when printed on a map: Basins - From the Subregional Drainage Basin Town Intersect layer, compiled and published by CT DEP. Source map scale is 1:24,000.State of Connecticut, Department of Environmental ProtectionHowie Sternbergmailing and physical address
79 Elm Street
HartfordConnecticut06106-5127USA860-424-3540860-424-4058dep.gisdata@ct.govMonday to Friday, 08:30 to 16:30 Eastern Standard Timehttp://www.cteco.uconn.edu/metadata/dep/browsegraphic/subregionaldrainagebasintownintersectfullview.gifFull view of Connecticut Subregional Basin Town Intersect. Data is limited to the State of Connecticut. Each feature includes subregional drainage basin and town number and name.GIFhttp://www.cteco.uconn.edu/metadata/dep/browsegraphic/subregionaldrainagebasintownintersectdetailview.gifDetail view of Connecticut Subregional Basin Town Intersect.GIFhttp://www.cteco.uconn.edu/metadata/dep/browsegraphic/subregionaldrainagebasintownintersectdetailviewclinton.gifDetail view of Connecticut Subregional Basin Town Intersect with features for the Town of Clinton outlined. Features are labeled with the 4-digit subregional drainage basin number and town name.GIFTom Nosal, State of Connecticut, Department of Environmental Protection, for the final compilation and delineation of 1:24,000-scale drainage basin boundaries, assignment of drainage basin numbers, and conversion to digitial format. Basin boundaries were manually delineated at 1:24,000-scale by visually interpreting the 10 feet contour elevation lines and waterbody features appearing on 1:24,000-scale 7.5 minute USGS topographic quadrangle maps for Connecticut published between 1969 and 1984. The metadata abstract includes a brief description of a drainage basin obtained from material written by Jim Murphy in an article entitled Reading the Landscape published in the Citizen's Bulletin, a CT DEP monthy magazine.These data are maintained by the State of Connecticut using ArcGIS software developed by Environmental Systems Research Institute (ESRI) in a Microsoft Windows operating system environment.Tom Nosal, Department of Environmental Protection, State of Connecticut (compiler and publisher)19970101Gazetteer of Drainage Basin Areas of ConnecticutdocumentWater Resources BulletinNo 15Hartford, Connecticut, USAState of Connecticut, Department of Environmental ProtectionGazetteer of Drainage Basin Areas of Connecticut is organized by the eight major drainage basins covering Connecticut. The individual basins that comprise each major basin are listed in hydrologic sequence, headwater to outfall, with drainage basin number, description, basin area, and cummulative drainage area listed for each individual basin.The primary data source for basin information in the Connecticut Subregional Drainage Basin Town Intersect feature class is the Connecticut Drainage Basins layer. The Connecticut Drainage Basins layer retains the feature types and information identified on the 1:24,000-scale compilation sheets for the Natural Drainage Basins in Connecticut map, McElroy, 1981. All attributes have valid values. Values are within defined domains. There are no duplicate LBASIN_NO values except where expected (see definition of LBASIN_NO attribute).
The SBASIN_NO is derived from the first 4-digits of BASIN_NO so the accuracy of the SBASIN_NO is dependent on that for the BASIN_NO. For polygon features, the accuracy test for the BASIN_NO attribute values was conducted by visually comparing the basin number information depicted on the source Mylar overlays with 1:24,000-scale check plots or interactive displays of the digital data on a computer graphic system. These check plot maps and computer displays labeled polygon features with BASIN_NO values and differentiated line features based on DBARC_COD values for comparison with the original source Mylars. Subsequently, four additional fields (MBAS_NO, RBAS_NO, SBAS_NO, LBAS_NO) were added and populated based on the first, first 2, first 4, and first 7 columns of the BASIN_NO attribute. The MAJOR, REGIONAL, and SUBREGION attributes store drainage basin names based on MBAS_NO, RBAS_NO, SBAS_NO values, respectively. Basin names were attributed by joining basin name lookup tables to the polygon features base on MBAS_NO, RBAS_NO, SBAS_NO key values and populating the corresponding fields. These basin names are from the Natural Drainage Basins in Connecticut map, McElroy, 1981. The AREA_SQMI (area in square miles) and ACREAGE (area in acres) field were automatically calculated for each polygon feature based on computer generated feature area in square feet.
The primary data source for the town attribute information is the Connecticut Town Poly feature class. Refer to this feature class metadata for town number and name attribute accuracy report information.Polygon features conform to the following topological rules. Polygons are single part. There are no duplicate polygons. Polygons do not self overlap. Polygons do not overlap other polygons. Lines are single part. Line features conform to the following topological rules. There are no duplicate lines. Lines do not self overlap. Lines do not overlap other lines. Lines intersect only at nodes, and nodes anchor the ends of all lines. Lines do not overshoot or undershoot other lines they are supposed to meet and intersect. In general, there are no duplicate features, unresolved intersections, overshooting lines, open polygons, sliver polygons, or unlabeled (unattributed) polygons. The tests of logical consistency were performed by the State of Connecticut using ESRI ArcInfo software to maintain feature topology in ArcInfo coverage format. The data is topologically clean. The ArcInfo Clean function was repeatedly used following edits to verify topology and enforce a minimum distance between vertices of 4 feet (fuzzy tolerance) and a minimum allowed overshoot length of 0 feet (dangle length).The data reflects the content of the data source, which is a set of 1:24,000 scale mylar sheets used to compile and publish the 1:125,000-scale Drainage Basins in Connecticut Map, McElroy, 1982. All major, regional, subregional, local and smaller basin divides were digitized from these 1:24,000-scale mylar compilation sheets. This data is not updated.The horizontal positional accuracy of this data complies with the United States National Map Accuracy Standards for 1:24,000 scale maps. According to this standard, not more than 10 percent of the locations tested are to be in error by more than 1/50 inch (40 feet) measured on the publication scale of a USGS 7.5 minute topographic quadrangle map.
Drainage basin boundaries were interpolated from 10 FT elevation contours and surface water body (hydrography) information published on a set of USGS 1:24,000-scale, 7.5-minute topographic quadrangle maps that cover the State of Connecticut. Natural drainage basin boundaries were manually delineated by interpolating elevation and water body information found on topographic quadrangle maps published by the USGS between 1962 and 1984.State of Connecticut, Department of Environmental ProtectionUnpublished Materialdrainage basin compilation sheetsstable base mylar24000stable-base materialSource 1 - Source MaterialsBasins compiled on 1:24,000-scale 7.5 minute USGS quadrangle area mylar overlays.State of Connecticut, Department of Environmental Protection1988Connecticut Drainage Basins2006vector digital dataHartford, Connecticut USAState of Connecticut, Department of Environmental ProtectionThe State of Connecticut, Department of Environmental Protection is the collector of the data (compiler), the creator and maintainer of the data layer (editor), and producer (publisher) of this information for use. Data compiled and digitized from the 1:24,000-scale compilation sheets for the 1:125,000-scale Natural Drainage Basins in Connecticut Map, McElroy, 1981. The 2006 Edition includes the same basin features originally published in 1988 with some minor corrections and improvements made to feature attribute information. Previously undetected errors have been corrected and are included in this 2006 edition. This data is not updated. Source map scale is 1:24,000.http://www.ct.gov/deep24000disc1988publication dateSource 2 - Drainage BasinsConnecticut Drainage Basins is in ArcInfo Coverage format having both polygon and line features. The name of the ArcInfo Coverage is BASIN.State of Connecticut, Department of Environmental Protection1988Connecticut Subregional Drainage Basins2006vector digital dataHartford, Connecticut USAState of Connecticut, Department of Environmental ProtectionThe State of Connecticut, Department of Environmental Protection is the collector of the data (compiler), the creator and maintainer of the data layer (editor), and producer (publisher) of this information for use. Data compiled and digitized from the 1:24,000-scale compilation sheets for the 1:125,000-scale Natural Drainage Basins in Connecticut Map, McElroy, 1981. The 2006 Edition includes the same basin features originally published in 1988 with some minor corrections and improvements made to feature attribute information. Previously undetected errors have been corrected and are included in this 2006 edition. This data is not updated. Source map scale is 1:24,000.http://www.ct.gov/deep24000disc1988publication dateSource 3 - Subregional Drainage BasinsConnecticut Subregional Drainage Basins is in ArcInfo Coverage format having both polygon and line features. The name of the ArcInfo Coverage is SBASIN. These polygon and line feature data were subsequently converted to geodatabase feature format and named SUBREGIONAL_BASIN_POLY and SUBREGIONAL_BASIN_LINE, respectively.State of Connecticut, Department of Environmental Protection (data editor and publisher)19940101Connecticut State Polygon2005vector digital dataHartford, Connecticut USAState of Connecticut, Department of Environmental Protectionhttp://www.ct.gov/deep24000disc19691984publication dateSource 4 - Connecticut State PolyA polygon feature-based layer that depicts the geographic area for the State of Connecticut as one polygon feature. Connecticut State Poly is in Geodatabase Feature Class format.State of Connecticut, Department of Environmental Protection2006Connecticut Subregional Drainage Basins for Clippingvector digital dataHartford, Connecticut USAState of Connecticut, Department of Environmental ProtectionThe State of Connecticut, Department of Environmental Protection is the collector of the data (compiler), the creator and maintainer of the data layer (editor), and producer (publisher) of this information for use. This data is not updated. Source map scale is 1:24,000.http://www.ct.gov/deep24000disc2005publication dateSource 5 - Subregional Drainage Basins for ClippingConnecticut Subregional Drainage Basins for Clipping originated from the Connecticut Subregional Drainage Basins Polygon feature class (SUBREGIONAL_BASIN_POLY)State of Connecticut, Department of Environmental Protection (data collector, editor and publisher)U.S. Geological Survey, National Mapping Program (data compiler)19940101Connecticut Town Polygon2005vector digital dataHartford, Connecticut, USAState of Connecticut, Department of Environmental ProtectionThe USGS is the collector of the data (compiler). The State of Connecticut, Department of Environmental Protection is the creator and maintainer of the data layer (editor) and producer (publisher) of this information for use. The 2005 Edition essentially includes the same set of geographic features published in 1994. However, the 2005 Edition differs from information published in 1994 primarily as a result of minor corrections and improvements to feature geometry and feature attribute information. Some feature attribute information (data fields) have been slightly modified and made easier to use. This layer includes information that is relatively static and does not change over time. Data is not updated. Data compiled at 1:24,000 scale.http://www.ct.gov/deep24000disk1969Publication dates of the USGS 7.5 minute topographic quadrangle maps for the State of Connecticut through 1984.Source 6 - Connecticut Town PolyA polygon feature-based layer that defines the geographic areas for the State of Connecticut and its counties and towns (municipalities) as depicted on the U.S. Geological Survey (USGS) 7.5 minute topographic quadrangle maps for the State of Connecticut. This layer only includes information for Connecticut. Connecticut_Town_Poly is in Geodatabase Feature Class format.State of Connecticut, Department of Environmental Protection (data compiler, editor and publisher)1988Connecticut Subregional Drainage Basin Town Intersect2006vector digital dataHartford, Connecticut, USAState of ConnecticutThe State of Connecticut, Department of Environmental Protection is the collector of the data (compiler), the creator and maintainer of the data layer (editor), and producer (publisher) of this information for use. This data is not updated. Source map scale is 1:24,000.http://www.ct.gov/deep24000disk1988publication dateSource 7 - Subregional Dranage Basin Town IntersectFeature digitizing and attribution (digitizing tablet method) - Using ESRI ArcInfo software, basin boundary line features were digitized by registering the individual compilation sheets to the digitizing tablet and using the crosshairs of the digitizer's mouse to manually capture the geometry (location) of features drafted on the map. The corners of the USGS 7.5 minute topographic quadrangle maps are used as registration points and are depicted on the source map. The source map was registered to the digitizing tablet by digitizing (entering) the locations of four quadrangle corner registration points shown on the map. ArcInfo software compared the values of the digitized coordinates with the actual (true) values for the quadrangle corner (tic) features. The Root Mean Square (RMS) error generated by the ArcInfo software indicated the amount of error involved in transforming coordinates from the registered map to the digital layer. RMS errors higher than 0.004 were not acceptable and required re-registering the source map by digitizing the tic locations again. With a correct registration, basins boundaries features were manually digitized off the source map. Where necessary, additional minor corrections (edits) to feature geometry were manually digitized on the screen (heads-up digitizing) at display scales greater than 1:24,000. Feature location and attribute accuracy was visually checked and inspected by symbolizing and labeling features according to attribute value on the computer screen and on hard copy paper maps, and comparing this information to the orginal source data. These check plot maps were printed at the same scale as the source maps in order to visually inspect digitizing quality and the assignment of attribute values.
Individual quadrangle level basin boundary coverages were appended and edgematched along quadrangle boundaries to create a statewide layer in ArcInfo Coverage format having both polygon and line features. Polygon label points were created and assigned BASIN_NO values that uniquely identified each polygon feature. Most other related polygon and line feature attributes were assigned through automated procedures based on the format and hierarchical nature of the BASIN_NO value. Four additional fields (MBAS_NO, RBAS_NO, SBAS_NO, LBAS_NO) were added and populated based on the first, first 2, first 4, and first 7 columns of the BASIN_NO attribute. The MAJOR, REGIONAL, and SUBREGION attributes store drainage basin names based on MBAS_NO, RBAS_NO, SBAS_NO values, respectively. Basin names were attributed by joining basin name lookup tables to the polygon features base on MBAS_NO, RBAS_NO, SBAS_NO key values and populating the corresponding fields. These basin names are from the Natural Drainage Basins in Connecticut map, McElroy, 1981. The AREA_SQMI (area in square miles) and ACREAGE (area in acres) field were automatically calculated for each polygon feature based on computer generated feature area in square feet. The GAZRECNO attribute was manually assigned to each basin polygon feature.
For line features, the DBARC_COD attribute was populated through a combination of automated and manual processes that compared the BASIN_NO attribute value of the polygon on each side of the line. For example, if the two polygons are in different major basins (MBAS_NO on the left <> MBAS_NO on the right), then the line feature represents a Major basin drainage divide and is assigned a DBARC_COD value of 1. If the left and right polygons are in the same Major basins but in different regional basins (RBAS_NO on the left <> RBAS_NO on the right), the line feature is a Regional basin drainage divide and is assigned a DBARC_COD value of 2, and so on. DIVIDE is the English language equivalent of (decodes) the DBARC_COD attribute value and was populated by joining a lookup table to the line features instead of manually attributing these values for each line feature. AV_LEGEND and IMS_LEGEND values were also attributed through table joins.Source 1 - Source Materials1988Source 2 - Drainage BasinsState of Connecticut, Department of Environmental ProtectionTom Nosalmailing and physical address
79 Elm Street
HartfordConnecticut06106USA806-424-3540860-424-4058Mondy to Friday, 8:30 to 16:30 Eastern Standard TimeCreate Subregional Drainage Basins - Using ArcInfo Workstation software, removed the BASIN_NO and LBAS_NO polygon feature attributes, calculated the ACREAGE and AREA_SQMI polygon attributes to zero, and dissolved polygon features on the remaining SBAS_NO, RBAS_NO, MBAS_NO, SUBREGIONAL, REGIONAL, and MAJOR attribute values to create subregional drainage basin polygon features. Using the ArcInfo Dissolve command, this step merged the smaller basin polygons into the larger subregional basin polygon features. Line features were preserved as part of the dissolve process and were merged using the ArcInfo Unsplit command afterwards. The ACREAGE and AREA_SQMI attributes were recalculated based on the new feature geometry, and ArcInfo coveage topology was re-established with the Build command.Source 2 - Drainage Basins1988Source 3 - Subregional Drainage BasinsState of Connecticut, Department of Environmental ProtectionTom Nosal, Howie Sternbergmailing and physical address
79 Elm Street
HartfordConnecticut06106USA860-424-3540860-424-4058Mondy to Friday, 8:30 to 16:30 Eastern Standard TimeSubregional Drainage Basin Polygon features along the Connecticut coastline were enlarged to extend beyond the Connecticut shoreline into Long Island Sound to the boundary between the State of Connectict and New York in Long Island Sound. This feature class is designed to be used as a Clip feature class to clip other point line and polygon features to the subregional drainage basin areas. This feature class differs from the Subregional Drainage Basin Polygon feature class in that features along the Connecticut coastline were enlarged to extend beyond the Connecticut shoreline to the boundary between the State of Connectict and New York in Long Island Sound. These modifications apply to the coastal subregional basins 2000, 5000, and 7000 where the basin boundary coresponding to the Connecticut shoreline was replaced with the CT-NY state boundary in Long Island Sounce. These basin areas were enlarged to ensure Clip input features located along and near both sides of the shoreline are included in the Clip output feature class and associated with a subregional coastal basin (e.g. 2000, 5000, or 7000). Input features that should be in these coastal basins may not be in the resulting Clip output feature class unless the Connecticut Subregional Drainage Basins for Clipping is used as the Clip feature class. Using the unmodified, original Connecticut Subregional Drainage Basin Polygon feature class as the Clip feature class may produce different results for basins 2000, 5000, and 7000. The data source for the CT-NY state boundary is the Connecticut State Poly feature class. Both data sources used - Subregional Drainage Basins and Connecticut State Poly - have a 1:24,000-scale source map scale.Source 3 - Subregional Drainage BasinsSource 4 - Connecticut State Poly2006Source 5 - Subregional Drainage Basins for ClippingState of Connecticut, Department of Environmental ProtectionHowie Sternbergmailing and physical address
79 Elm Street
HartfordConnecticut06106USA860-424-3540860-424-4058Mondy to Friday, 8:30 to 16:30 Eastern Standard TimeCreate Subregional Drainage Basin Town Intersect - Using a copy of the Connecticut Town Poly feature class, deleted all polygon attributes with the exception of town number (TOWN_NO) and town name (TOWN). Applied the Intersect geoprocessing command to overlay the modified town feature class with Subregional Drainage Basins for Clipping to create Connecticut Subregional Basin Town Intersect feature class, which only included polygon features where the two input feature classes intersected and overlapped each other. The ACREAGE and AREA_SQMI attributes in Connecticut Subregional Basin Town Intersect were recalculated based on the new feature geometry. The total geographic area covered by all polygon features is 4,967.56 square miles. Source 5 - Subregional Drainage Basins for ClippingSource 6 - Connecticut Town Poly2006Source 7 - Subregional Dranage Basin Town IntersectState of Connecticut, Department of Enviromental ProtectionHowie Sternbergmailing and physical address
79 Elm Street
HartfordConnecticut06106-5127USA860-424-3540860-424-4058dep.gisdata@po.sate.ct.usMonday to Friday, 08:30 to 16:30 Eastern Standard TimeConnecticut DEP Major Basin Number, Regional Basin Number, Subregional Basin Number, Local Basin Number, Basin NumberVectorG-polygon2099Lambert Conformal ConicLambert Conformal Conic41.20000041.866667-72.75000040.833333999999.999996499999.999998coordinate pair0.0002500.000250survey feetNorth American Datum of 1983Geodetic Reference System 806378137.000000298.2572221.000000Explicit elevation coordinate included with horizontal coordinatesConnecticut Subregional Drainage Basin Town IntersectPolygon features depict the intersection and overlap of Connecticut Subregional drainage basins and Connecticut towns (municipalities). There is one polygon feature for each subregional drainage basin - town combination, including one for each coastal island identifying both the town the island is located in and the coastal subregional basin the island is offshore of.State of Connecticut, Department of Environmental ProtectionOBJECTIDInternal feature number.ESRISequential unique whole numbers that are automatically generated.SHAPEFeature geometry.ESRICoordinates defining the features.SBAS_NOSubregional Drainage Basin Number - This number defines the Subregional drainage basin and is the first 4 digits of the 13-digit drainage basin identification number (BASIN_NO). The first digit corresponds to the Major basin number (MBAS_NO) and the first 2 digits represent the Regional basin number (RBAS_NO). All Subregional basins in the same Major and Regional basin have the same first and first 2 digits, respectively. A Subregional drainage basin number ending in "00" defines the main-stem basin for the corresponding Regional drainage basin. For example, Subregional basin 4300 is the main-stem basin for Regional basin 43. These main-stem Subregional basins are usually named after the corresponding Regional basin.State of Connecticut, Department of Environmental Protection1000Pawcatuck River1001Wyassup Brook1002Green Fall River1003Ashaway River1004Shunock River1100Wood River1101Brushy Brook2000Southeast Shoreline2101Anguilla Brook2102Copps Brook2103Williams Brook2104Whitford Brook2105Haleys Brook2106Mystic River2107Great Brook2201Jordan Brook2202Latimer Brook2203Oil Mill Brook2204Niantic River2205Pattagansett River2206Bride Brook2207Fourmile River3000Thames River3001Trading Cove Brook3002Shewville Brook3003Poquetanuck Brook3004Oxoboxo Brook3005Stony Brook3006Hunts Brook3100Willimantic River3101Edson Brook3102Middle River3103Furnace Brook3104Roaring Brook3105Mill Brook3106Skungamaug River3107Burnap Brook3108Hop River3109Giffords Brook3110Tenmile River3200Natchaug River3201Bungee Brook3202Still River3203Bigelow Brook3204Stonehouse Brook3205Squaw Hollow Brook3206Mount Hope River3207Fenton River3208Sawmill Brook3300French River3301Mill Brook3400Fivemile River3401Rocky Brook3402Mary Brown Brook3403Cady Brook3404Whetstone Brook3500Moosup River3501Quanduck Brook3502Snake Meadow Brook3503Ekonk Brook3600Pachaug River3601Great Meadow Brook3602Mount Misery Brook3603Denison Brook3604Myron Kinney Brook3605Billings Brook3700Quinebaug River3701Hamilton Reservoir Brook3702Breakneck Brook3703Hatchet Brook3704Cohasse Brook3705Lebanon Brook3706English Neighborhood Brook3707Mill Brook3708Little River3709Wappoquia Brook3710Mashamoquet Brook3711Blackwell Brook3712Fry Brook3713Mill Brook3714Kitt Brook3715Cory Brook3716Broad Brook3717Choate Brook3800Shetucket River3801Indian Hollow Brook3802Beaver Brook3803Merrick Brook3804Beaver Brook3805Little River3900Yantic River3901Exeter Brook3902Bartlett Brook3903Sherman Brook3904Deep River3905Pease Brook3906Gardner Brook3907Susquetonscut Brook4000Connecticut River4001Great Brook4002Threemile Brook4003Freshwater Brook4004Podunk River4005Folly Brook4006Salmon Brook4007Hubbard Brook4008Cold Brook4009Roaring Brook4010Goff Brook4011Reservoir Brook4012Carr Brook4013Sumner Brook4014Higganum Creek4015Mill Creek4016Whalebone Creek4017Chester Creek4018Deep River4019Falls River4020Lieutenant River4021Black Hall River4100Stony Brook4101Muddy Brook4200Scantic River4201Watchaug Brook4202Gillettes Brook4203Gulf Stream4204Abbey Brook4205Buckhorn Brook4206Broad Brook4207Ketch Brook4300Farmington River4301Slocum Brook4302Mad River4303Still River4304Sandy Brook4305Morgan Brook4306Valley Brook4307Hubbard Brook4308East Branch Farmington River4309Cherry Brook4310Nepaug River4311Burlington Brook4312Roaring Brook4313Poland River4314Copper Mine Brook4315Pequabuck River4316Thompson Brook4317Nod Brook4318Hop Brook4319West Branch Salmon Brook4320Salmon Brook4321Mill Brook4400Park River4401Bass Brook4402Piper Brook4403Trout Brook4404North Branch Park River4500Hockanum River4501Charters Brook4502Marsh Brook4503Tankerhoosen River4504South Fork Hockanum River4600Mattabesset River4601Belcher Brook4602Willow Brook4603Webster Brook4604Sawmill Brook4605Allyn Brook4606Sawmill Brook4607Coginchaug River4700Salmon River4701Raymond Brook4702Judd Brook4703Meadow Brook4704Pine Brook4705Jeremy River4706Fawn Brook4707Blackledge River4708Dickinson Creek4709Pine Brook4710Moodus River4800Eightmile River4801Harris Brook4802East Branch Eightmile River4803Beaver Brook5000South Central Shoreline5101Oyster River5102Patchogue River5103Menunketesuck River5104Indian River5105Chatfield Hollow Brook5106Hammonasset River5107Neck River5108East River5109Sluice Creek5110West River5111Branford River5112Farm River5200Quinnipiac River5201Eightmile River5202Tenmile River5203Misery Brook5204Broad Brook5205Sodom Brook5206Harbor Brook5207Wharton Brook5208Muddy River5301Willow Brook5302Mill River5303Sargent River5304Wintergreen Brook5305West River5306Indian River5307Wepawaug River6000Housatonic River6001Sages Ravine Brook6002Schenob Brook6003Andrus Brook6004Konkapot River6005Factory Brook6006Spruce Swamp Creek6007Salmon Creek6008Mill Brook6009Carse Brook6010Furnace Brook6011Guinea Brook6012Kent Falls Brook6013Cobble Brook6014Bog Hollow Brook6015Macedonia Brook6016Womenshenuk Brook6017Morrissey Brook6018Pond Brook6019Deep Brook6020Pootatuck River6021Kettletown Brook6022Halfway River6023Eightmile Brook6024Means Brook6025Farmill River6026Pumpkin Ground Brook6100Blackberry River6101Whiting River6200Hollenbeck River6201Brown Brook6202Wangum Lake Brook6300Tenmile River6301Indian Lake Creek6302Mill Brook6303Webatuck Creek6304Deuel Hollow Brook6305Mill River6306Swamp River6400Lake Candlewood6401Sawmill Brook6402Ball Pond Brook6500West Aspetuck River6501Merryall Brook6502East Aspetuck River6600Still River6601Miry Brook6602Boggs Pond Brook6603Padanaram Brook6604Sympaug Brook6605East Swamp Brook6606Limekiln Brook6700Shepaug River6701Marshepaug River6702West Branch Shepaug River6703West Branch Bantam River6704Butternut Brook6705Bantam River6706Jacks Brook6800Pomperaug River6801East Spring Brook6802Nonewaug River6803Sprain Brook6804Weekeepeemee River6805Hesseky Brook6806Transylvania Brook6900Naugatuck River6901Hall Meadow Brook6902Hart Brook6903Nickel Mine Brook6904West Branch Naugatuck River6905East Branch Naugatuck River6906Spruce Brook6907Rock Brook6908Leadmine Brook6909Northfield Brook6910Branch Brook6911Hancock Brook6912Steele Brook6913Beaver Pond Brook6914Mad River6915Fulling Mill Brook6916Hop Brook6917Long Meadow Pond Brook6918Beacon Hill Brook6919Bladens River6920Little River7000Southwest Shoreline7101Lewis Gut7102Bruce Brook7103Yellow Mill Channel7104Booth Hill Brook7105Pequonnock River7106Ash Creek7107Cricker Brook7108Mill River7109Sasco Brook7200Saugatuck River7201Little River7202Aspetuck River7203West Branch Saugatuck River7300Norwalk River7301Comstock Brook7302Silvermine River7401Fivemile River7402Darien River7403Noroton River7404Mill River7405Rippowam River7406East Branch Mianus River7407Mianus River7408Greenwich Creek7409Horseneck Brook7410East Branch Byram River7411Byram River7412Blind Brook8000Hudson River8100Croton River8101Quaker Brook8102Corner Pond Brook8103East Branch Croton River8104Titicus River8105Waccabuc RiverSUBREGIONSubregional Drainage Basin Name - Text values that correspond to numeric SBAS_NO attribute values. SUBREGION is the English language equivalent of (decodes) the SBAS_NO field.State of Connecticut, Department of Environmental ProtectionSee Enumerated Domain Value Definitions for SBAS_NO attribute.RBAS_NORegional Drainage Basin Number - This number defines the Regional drainage basin and is the first 2 digits of the 13-digit drainage basin identification number (BASIN_NO). The first digit corresponds to the Major basin number (MBAS_NO). All Regional basins in the same Major basin have the same first digit. A Regional drainage basin number ending in "0" defines the greater main-stem basin for the corresponding Major drainage basin. For example, Regional basin 40 is the main-stem basin for Major basin 4. These main-stem Regional basins are usually named after the corresponding Major basin.State of Connecticut, Department of Environmental Protection10Pawcatuck Main Stem11Wood20Southeast Shoreline21Southeast Eastern Complex22Southeast Western Complex30Thames Main Stem31Willimantic32Natchaug33French34Fivemile35Moosup36Pachaug37Quinebaug38Shetucket39Yantic40Connecticut Main Stem41Stony Brook42Scantic43Farmington44Park45Hockanum46Mattabesset47Salmon48Eightmile50South Central Shoreline51South Central Eastern Complex52Quinnipiac53South Central Western Complex60Housatonic Main Stem61Blackberry62Hollenbeck63Tenmile64Candlewood65Aspetuck66Still67Shepaug68Pomperaug69Naugatuck70Southwest Shoreline71Southwest Eastern72Saugatuck73Norwalk74Southwest Western Complex80Hudson Main Stem81CrotonREGIONALRegional Drainage Basin Name - Text values that correspond to numeric RBAS_NO attribute values. REGIONAL is the English language equivalent of (decodes) the RBAS_NO field.State of Connecticut, Department of Environmental ProtectionSee Enumerated Domain Value Definitions for RBAS_NO attribute.MBAS_NOMajor Drainage Basin Number - This number defines the major drainage basin and is the first digit of the 13-digit drainage basin identification number (BASIN_NO). There are 8 Major basins.State of Connecticut, Department of Environmental Protection1Pawcatuck2Southeast Coast3Thames4Connecticut5South Central Coast6Housatonic7Southwest Coast8HudsonMAJORMajor Drainage Basin Name - Text values that correspond to numeric MBAS_NO attribute values. MAJOR is the English language equivalent of (decodes) the MBAS_NO field.State of Connecticut, Department of Environmental ProtectionSee Enumerated Domain Value Definitions for MBAS_NO attribute.TOWN_NOTown Number - ID number for the Connecticut Town (municipality), based on the Town Codes issued by the State of Connecticut, Office of the State Controller, which range from 1 to 169.State of Connecticut, Office of the State ControllerNumeric value ranging from 1 to 169.TOWNTown Name - Text values that correspond to numeric TOWN_NO attribute values. TOWN is the English language equivalent of (decodes) the TOWN_NO field.State of Connecticut, Office of the State ControllerText value (town name).ACREAGECalculated area of polygon feature in acres. Note, ACREAGE values are not automatically updated after modifying feature geometry (shape). Values must be recalculated after features are edited, simplified, generalized, clipped, dissolved, etc.State of Connecticut, Department of Environmental ProtectionNumeric valueAREA_SQMICalculated area of polygon feature in square miles. Note, AREA_SQMI values are not automatically updated after modifying feature geometry (shape). Values must be recalculated after features are edited, simplified, generalized, clipped, dissolved, etc.State of Connecticut, Department of Environmental ProtectionNumeric valueSHAPE.areaSHAPE.lenInformation encoded for drainage basin polygon features generally includes drainage basin number and name, town number and name, and feature size. The SBAS_NO uniquely identifes subreginal drainage basins and uniquely identifies each polygon feature. It represents the first 4 digits of the 13 digit BASIN_NO. The drainage basin numbering system is hierarchical. Use the MBAS_NO and RBAS_NO attributes to identify the major and regional drainage basin for each subregional drainage basin feature. The TOWN_NO identifies the Connecticut Town the basin feature is located in. Typically basins are located in more than one town and a town will include more than one basin so there is a polygon feature for each subregional basin - town occurrence. Use the AREA_SQMI and ACREAGE attributes to determine drainage basin - town polygon feature size. These values reflect the area of the respective polygon feature. They do not reflect the cumulative (upstream) drainage area for each basin. Note, ACREAGE and AREA_SQMI values are not automatically updated after modifying feature geometry (shape). These values must be recalculated after features are edited, simplified, generalized, clipped, dissolved, etc.Basin Numbers:
4 = Major drainage basin number, MBAS_NO (column 1)
43 = Regional drainage basin number, RBAS_NO (columns 1-2)
4302 = Subregional drainage basin number, SBAS_NO (columns 1-4)
4302-04 = Local drainage basin number, LBAS_NO (columns 1-7)
4302-04-1-R12 = Basin drainage identification number, BASIN_NO (columns 1-13)
Stream Order (column 9):
4304-00-1 = Stream order value of 1 represents a headwater basin.
4304-00-2 = Stream order value > 1 denotes the complexity of the drainage basin morphology.
Mapping Status Element (column 10):
4302-00-2- = Ending with minus sign (-) denotes detail mapping at 1:24,000 scale for entire basin.
4302-00-2+ = Ending with plus sign (+) denotes detailed mapping not performed at 1:24,000 scale for the entire drainage basin. The Stream Order value will not reflect the complexity of the drainage basin morphology.
4302-00-1* = Ending with asterisk sign (*) denotes a headwater basin containing a delineated impoundment into which a delineated drainage basin outlets.
Reach-Impoundment Identifier (column11) and Number (column 12-13):
4302-00-1-L1 = The value for the Reach-Impoundment Identifier for an impounment basin is L (for lake). It is followed by the Reach-Impoundment Number (1).
4302-04-1-R12 = The value for the Reach-Impoundment Identifier for a stream reach basin is R (for reach). It is followed the Reach-Impoundment Number (12).Connecticut Town numbers, based on the Town Codes issued by the State of Connecticut, range from 1 to 169 in the following order:
Andover (1), Ansonia (2), Ashford (3), Avon (4), Barkhamsted (5), Beacon Falls (6), Berlin (7), Bethany (8), Bethel (9), Bethlehem (10), Bloomfield (11), Bolton (12), Bozrah (13), Branford (14), Bridgeport (15), Bridgewater (16), Bristol (17), Brookfield (18), Brooklyn (19), Burlington (20), Canaan (21), Canterbury (22), Canton (23), Chaplin (24), Cheshire (25), Chester (26), Clinton (27), Colchester (28), Colebrook (29), Columbia (30), Cornwall (31), Coventry (32), Cromwell (33), Danbury (34), Darien (35), Deep River (36), Derby (37), Durham (38), Eastford (39), East Granby (40), East Haddam (41), East Hampton (42), East Hartford (43), East Haven (44), East Lyme (45), Easton (46), East Windsor (47), Ellington (48), Enfield (49), Essex (50), Fairfield (51), Farmington (52), Franklin (53), Glastonbury (54), Goshen (55), Granby (56), Greenwich (57), Griswold (58), Groton (59), Guilford (60), Haddam (61), Hamden (62), Hampton (63), Hartford (64), Hartland (65), Harwinton (66), Hebron (67), Kent (68), Killingly (69), Killingworth (70), Lebanon (71), Ledyard (72), Lisbon (73), Litchfield (74), Lyme (75), Madison (76), Manchester (77), Mansfield (78), Marlborough (79), Meriden (80), Middlebury (81), Middlefield (82), Middletown (83), Milford (84), Monroe (85), Montville (86), Morris (87), Naugatuck (88), New Britain (89), New Canaan (90), New Fairfield (91), New Hartford (92), New Haven (93), Newington (94), New London (95), New Milford (96), Newtown (97), Norfolk (98), North Branford (99), North Canaan (100), North Haven (101), North Stonington (102), Norwalk (103), Norwich (104), Old Lyme (105), Old Saybrook (106), Orange (107), Oxford (108), Plainfield (109), Plainville (110), Plymouth (111), Pomfret (112), Portland (113), Preston (114), Prospect (115), Putnam (116), Redding (117), Ridgefield (118), Rocky Hill (119), Roxbury (120), Salem (121), Salisbury (122), Scotland (123), Seymour (124), Sharon (125), Shelton (126), Sherman (127), Simsbury (128), Somers (129), Southbury (130), Southington (131), South Windsor (132), Sprague (133), Stafford (134), Stamford (135), Sterling (136), Stonington (137), Stratford (138), Suffield (139), Thomaston (140), Thompson (141), Tolland (142), Torrington (143), Trumbull (144), Union (145), Vernon (146), Voluntown (147), Wallingford (148), Warren (149), Washington (150), Waterbury (151), Waterford (152), Watertown (153), Westbrook (154), West Hartford (155), West Haven (156), Weston (157), Westport (158), Wethersfield (159), Willington (160), Wilton (161), Winchester (162), Windham (163), Windsor (164), Windsor Locks (165), Wolcott (166), Woodbridge (167), Woodbury (168), and Woodstock (169).State of Connecticut, Department of Enviromental Protectionmailing and physical address
79 Elm Street
HartfordConnecticut06106-5127USA860-424-3540860-424-4058dep.gisdata@ct.govMonday to Friday, 08:30 to 16:30 Eastern Standard TimeConnecticut Subregional Drainage Basin Town IntersectAlthough this data set has been used by the State of Connecticut, Department of Environmental Protection, no warranty, expressed or implied, is made by the State of Connecticut, Department of Environmental Protection as to the accuracy of the data and or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the State of Connecticut, Department of Environmental Protection in the use of these data or related materials. The user assumes the entire risk related to the use of these data. Once the data is distributed to the user, modifications made to the data by the user should be noted in the metadata.Shapefile, Feature ClassArcGISZip filehttp://www.ct.gov/deepAn online copy of the data may be accessed without charge.The data distributor does not provide custom GIS analysis or mapping services. Data is available in a standard format and may be converted to other formats, projections, coordinate systems, or selected for specific geographic regions by the party receiving the data.Geographic information sytem (GIS), computer-aided drawing or other mapping software is necessary to display, view and access the information.20120125State of Connecticut, Department of Environmental ProtectionHowie Sternbergmailing and physical address
79 Elm Street
HartfordConnecticut06106-5127USA860-424-3540860-424-4058dep.gisdata@ct.govMonday to Friday, 08:30 to 16:30 Eastern Standard TimeFGDC Content Standards for Digital Geospatial MetadataFGDC-STD-001-1998local timehttp://www.esri.com/metadata/esriprof80.htmlESRI Metadata Profile