2020031813241000FALSE202507240851050020250730102736001.0RiversStreams002745263.9533901243641.00092669996.8681231021075.6851211ProjectedGCS_North_American_1983Linear Unit: Foot_US (0.304801)NAD_1983_StatePlane_New_Hampshire_FIPS_2800_Feet<ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/10.8'><WKT>PROJCS["NAD_1983_StatePlane_New_Hampshire_FIPS_2800_Feet",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",984250.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-71.66666666666667],PARAMETER["Scale_Factor",0.9999666666666667],PARAMETER["Latitude_Of_Origin",42.5],UNIT["Foot_US",0.3048006096012192],AUTHORITY["EPSG",3437]]</WKT><XOrigin>-17463700</XOrigin><YOrigin>-48257000</YOrigin><XYScale>3048.0060960121928</XYScale><ZOrigin>-100000</ZOrigin><ZScale>10000</ZScale><MOrigin>-100000</MOrigin><MScale>10000</MScale><XYTolerance>0.0032808333333333331</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>102710</WKID><LatestWKID>3437</LatestWKID></ProjectedCoordinateSystem>FGDC CSDGM Metadata6250005000ItemDescriptionESRI ArcCatalog 9.3.1.1850enThe National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's surface water drainage system. NHD data was originally developed at 1:100,000-scale and exists at that scale for the whole country. This high-resolution NHD, generally developed at 1:24,000/1:12,000 scale, adds detail to the original 1:100,000-scale NHD. (Data for Alaska, Puerto Rico and the Virgin Islands was developed at high-resolution, not 1:100,000 scale.) Local resolution NHD is being developed where partners and data exist. The NHD contains reach codes for networked features, flow direction, names, and centerline representations for areal water bodies. Reaches are also defined on waterbodies and the approximate shorelines of the Great Lakes, the Atlantic and Pacific Oceans and the Gulf of Mexico. The NHD also incorporates the National Spatial Data Infrastructure framework criteria established by the Federal Geographic Data Committee.The NHD is a national framework for assigning reach addresses to water-related entities, such as industrial discharges, drinking water supplies, fish habitat areas, wild and scenic rivers. Reach addresses establish the locations of these entities relative to one another within the NHD surface water drainage network, much like addresses on streets. Once linked to the NHD by their reach addresses, the upstream/downstream relationships of these water-related entities--and any associated information about them--can be analyzed using software tools ranging from spreadsheets to geographic information systems (GIS). GIS can also be used to combine NHD-based network analysis with other data layers, such as soils, land use and population, to help understand and display their respective effects upon one another. Furthermore, because the NHD provides a nationally consistent framework for addressing and analysis, water-related information linked to reach addresses by one organization (national, state, local) can be shared with other organizations and easily integrated into many different types of applications to the benefit of all.U.S. Geological Survey in cooperation with U.S. Environmental Protection Agency, USDA Forest Service, and other Federal, State and local partners (see dataset specific metadata under Data_Set_Credit for details).See dataset specific metadata.RiversStreamsNHDFlowlinevector digital datawithheldUnknownReston, VirginiaU.S. Geological SurveySee dataset specific metadata.REQUIRED: The year (and optionally month, or month and day) for which the data set corresponds to the ground.Irregular-200-56.8344239143.1655760U.S. Department of the Interior, U.S. Geological Survey, 1999, Standards for National Hydrography Dataset (http://mapping.usgs.gov/standards/)FWHydrographyHydrographyStream / RiverLake / PondCanal / DitchReservoirSpring / SeepSwamp / MarshArtificial PathReach CodeUSU.S. Department of Commerce, 1977, Countries, dependencies, areas of special sovereignty, and their principal administrative divisions (Federal Information Processing Standards 10-3): Washington, D.C., National Institute of Standards and Technology.None.None. Acknowledgment of the originating agencies would
be appreciated in products derived from these data.Personal GeoDatabase Feature ClassEarth Science Information Center, U.S. Geological Survey1 888 ASK USGSask@usgs.gov0800-1600 Eastern TimeIn addition to the address above there are other ESIC offices throughout the country. A full list of these offices is at URL: http://mapping.usgs.gov/esic/esic_index.htmlSee dataset specific metadata. Version 6.2 (Build 9200) ; Esri ArcGIS 10.9.1.28388RiversStreams2015-09-01T00:00:002015-09-01T00:00:00NHD0.0000000.000000NHFG-assigned attributes to be updated when NHD features change.2015-09-01T00:00:002016-03-17T00:00:001-72.595370-70.65868245.30113442.688005Project Goal: The goal of this project was to develop a standard Northeastern Aquatic HabitatClassification (NEAHCS) and GIS map for 13 northeastern states (ME, NH, VT, MA, RI, CT, NY, PA, NJ,DE, MD, VA, WV, and DC.) that are part of the Northeast Association of Fish and Wildlife Agencies (NEAFWA). This classification and GIS dataset was designed to consistently represent the expected natural aquatic habitat types across this region in a manner deemed appropriate and useful for conservation planning by the participating states. This product is not intended to override state classifications, but is meant to complement state classifications and provide a means for looking at aquatic biodiversity patterns across the region.
Background: With the creation and implementation of State Wildlife Action Plans (SWAP) by state fisheries and wildlife agencies, the need for consistent, current digital habitat maps has grown dramatically. The implementation of the SWAPs within each state and across the Northeast region willbe greatly enhanced through the development of current, consistent terrestrial and aquatic habitat geographic information systems (GIS) datasets. These habitat datasets are expected to form the foundation of state and regional conservation in the Northeastern United States. Key anticipated uses include the following:
- Provide common definitions and mapping of aquatic habitat types across state lines. This will allow each state to identify aquatic habitats consistently across jurisdictional borders, such as large habitat patches and watersheds that cover multiple jurisdictions. This will also improve the success of state-level actions by assisting jurisdictions that have not yet developed aquatic habitat classification and mapping tools.
- Facilitate a new understanding of aquatic biota and populations on a regional scale by linking biological datasets to the regional aquatic habitat types for reporting and analysis.
- Create a new opportunity to assess the condition and prioritize habitats at a scale broader than the individual state by linking and reporting information on dams, land use, conservation lands, impaired waters, and other condition metrics by the regional aquatic habitat types
Developing an Aquatic Ecosystem Classification: Unlike terrestrial communities, no national standard aquatic community classification for the U.S. currently exists. The comprehensive biological sampledata necessary to develop a classification and map of aquatic ecosystems from biological data alone is also lacking across large regions, including the northeast states. The Northeast Aquatic Habitat Classification System thus used the aquatic biophysical classification approach developed by the Nature Conservancy and recommended by the National Fish Habitat Science Panel (Olivero and Anderson 2003, Higgins et al. 2005, Beard et al. 2006). This classification approach can be implemented at regional scales and emphasizes the environmental gradients of climate, elevation, landform, and geology which are known to shape aquatic ecosystems at several spatial scales and influence the physical aquatic habitat diversity (Higgins et al. 2005). The individual variables chosen to define specific aquatic habitat types can vary between regions, and regions are encouraged to refine the classification attributes to better reflect more meaningful ecological breaks and variables within their region (Higgins et al. 2005, Beard and Whelan, 2006). The Northeastern Aquatic Habitat Classification System (NAHCS) workgroup decided to use 4 primary variables to define aquatic habitat types in northeast streams and rivers. These variables include stream size, gradient, geologic buffering capacity, and natural stream temperature regime. Please see the full report for more information on why these variables were chosen and how the classification was applied.
NH Fish and Game Department transferred the TNC attributes to the 1:24,000-scale high-resolution NHD data for New Hampshire. https://www.nhgeodata.unh.edu/datasets/NHGRANIT::new-hampshire-hydrography-dataset-flowline/about
Aquatic habitat condition assessment and Important Fish Habitat attributes updated by NHFG April 2025.
<DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 64 18 0;"><SPAN>This dataset represents the results (9/30/2008) of the Northeastern Aquatic Habitat ClassificationSystem (NAHCS) GIS map for streams and rivers. This classification focused on mapping a stream habitat types across 13 northeastern states (ME, NH, VT, MA, CT, RI, NY, NJ, PA, MD, DC, DE, VA,WV). Stream and river centerlines were extracted from the USGS National Hydrography Dataset Plus (NH-Plus) 2006 1:100,000 data. These reaches were attributed and placed into classes representing their biopysical setting in terms of stream size, gradient, and geology, and expected natural water temperature regime. Please see the attribute descriptions for more information on the variable thresholds and the summary taxonomy. </SPAN></P><P STYLE="margin:0 64 18 0;"><SPAN>NH Fish and Game Department transferred the TNC attributes to the 1:24,000-scale high-resolution NHD data for New Hampshire. https://www.nhgeodata.unh.edu/datasets/NHGRANIT::new-hampshire-hydrography-dataset-flowline/about </SPAN></P><P STYLE="margin:0 64 18 0;"><SPAN>Aquatic habitat condition assessment and Important Fish Habitat attributes updated by NHFG April 2025.</SPAN></P></DIV></DIV></DIV>United States Geological Survey and the US Environmental Protection Agency, 2006; The NatureConservancy (TNC) Eastern Conservation Science, 2008.
NH Fish and Game Department (NHFG) transferred attributes to the 1:24,000-scale NH Hydrography Dataset, current source link: https://www.nhgeodata.unh.edu/datasets/NHGRANIT::new-hampshire-hydrography-dataset-flowline/about
Aquatic habitat condition assessment and Important Fish Habitat attributes updated by NHFG April 2025.FWHydrographyHydrographyStreamsRiversNortheastNew EnglandNew HampshireNHNHFGNH Fish and GamebiotaenvironmenthabitatwildlifeSWAPWildlife Action Plan<DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 59 18 0;"><SPAN>The Nature Conservancy (TNC) compiled this data set from the analysis of publicly available data sources. It is freely distributable without permission from this TNC resource office. This data set must be cited on all electronic and hard copy products using the language of the Data Set Credit.</SPAN></P></DIV></DIV></DIV>enFGDC Content Standards for Digital Geospatial MetadataFGDC-STD-001-1998local timeREQUIRED: The person responsible for the metadata information.Earth Science Information Center, U.S. Geological Surveymailing addressRestonVA20192
507 National Center
USA1 888 ASK USGS.nhd@usgs.govIn addition to the address above there are other ESIC offices throughout the country. A full list of these offices is at URL: http://mapping.usgs.gov/esic/esic_index.html20100520ISO 19115 Geographic Information - MetadataDIS_ESRI1.0datasetDownloadable DataArcGIS Geodatabase8.3tar and uncompress002withheldLocal Area NetworkPersonal GeoDatabase Feature ClassFile Geodatabase Feature ClassVectorSimpleFALSE0TRUEFALSEGCS_North_American_1983North American Datum of 1983Geodetic Reference System 806378137.000000298.257222Explicit elevation coordinate included with horizontal coordinates0.000025National Geodetic Vertical Datum of 1929metersGCS_North_American_1983EPSG6.12(9.3.0.0)0RiversStreamsFeature Class0OBJECTIDOBJECTIDOID400Internal feature number.ESRISequential unique whole numbers that are automatically generated.ShapeShapeGeometry000Feature geometry.ESRICoordinates defining the features.FDateFDateDate800Feature dateNHDResolutionResolutionInteger400NHDNHDGNIS_IDGNIS_IDString1000GNIS identifierGNISGNIS_NameGNIS_NameString6500Name of water bodyGNISLengthKMLengthKMDouble800Length of reach in kilometerscalculatedReachCodeReachCodeString1400Reach codeNHDFlowDirFlowDirInteger400Flow directionNHDPermanent_IdentifierPermanent_IdentifierString4000NHDNHDFTypeFTypeInteger400Feature typeNHDFCodeFCodeInteger400Feature codeNHDShape_LengthShape_LengthDouble800Length of feature in internal units.ESRIPositive real numbers that are automatically generated.Underground Conduit420ComID0ResolutionResolutionCoded ValueDefault valueDuplicateInteger2FlowDir0HydroFlowDirectionsCoded ValueDefault valueDuplicateIntegerFType420FCode42000Underground Conduit FCodeCoded ValueDefault valueDuplicateIntegerStreamRiver460ComID0ResolutionResolutionCoded ValueDefault valueDuplicateInteger2FlowDir0HydroFlowDirectionsCoded ValueDefault valueDuplicateIntegerFType460FCode46006StreamRiver FCodeCoded ValueDefault valueDuplicateIntegerPipeline428ComID0ResolutionResolutionCoded ValueDefault valueDuplicateInteger2FlowDir0HydroFlowDirectionsCoded ValueDefault valueDuplicateIntegerFType428FCode42805Pipeline FCodeCoded ValueDefault valueDuplicateIntegerArtificialPath558ComID0ResolutionResolutionCoded ValueDefault valueDuplicateInteger2FlowDir0HydroFlowDirectionsCoded ValueDefault valueDuplicateIntegerFType558FCode55800ArtificialPath FCodeCoded ValueDefault valueDuplicateIntegerWBArea_Permanent_IdentifierWBArea_Permanent_IdentifierString4000NHDNHDCanalDitch336ComID0ResolutionResolutionCoded ValueDefault valueDuplicateInteger2FlowDir0HydroFlowDirectionsCoded ValueDefault valueDuplicateIntegerFType336FCode33600CanalDitch FCodeCoded ValueDefault valueDuplicateIntegerConnector334ComID0ResolutionResolutionCoded ValueDefault valueDuplicateInteger2FlowDir0HydroFlowDirectionsCoded ValueDefault valueDuplicateIntegerFType334FCode33400Connector FCodeCoded ValueDefault valueDuplicateIntegerEnabledEnabledSmallInteger200NHDNHDCoastline566ComID0ResolutionResolutionCoded ValueDefault valueDuplicateInteger2FlowDir0HydroFlowDirectionsCoded ValueDefault valueDuplicateIntegerFType566FCode56600Coastline FCodeCoded ValueDefault valueDuplicateIntegerSOrderSOrderSmallInteger200Stream orderNH Department of Environmental ServicesNHDESIDNHDESIDString4000unique identifierNH Department of Environmental ServicesNHDESMODELNHDESMODELString2000Coldwater fisheries predictive modelNH Department of Environmental ServicesNHTEMPNHTEMPString1000NH Fishery temperature class from NHDES model and species occurrence recordsNH Fish and Game DepartmentTIDALTIDALString100Reach is tidal (Y or N)NH Fish and Game DepartmentDESCRIPDESCRIPString3000DescriptionNHDNOTESNOTESString12000NotesNHDEBTEBTString100SPPCONCERNSPPCONCERNString100SPRINGFEDSpringFedString1000ABLABLString100BridleShinerBridleShinerString100HerringStockHerringStockString100ShadRestorShadRestorString100AnadFishAnadFishString100NHFGinterestNHFGinterestString100COLD_CATCOLD_CATString3000WAPSPECIESWAPSPECIESString8000WAP_CATWAP_CATString4000MILESMILESDouble800NHFGIDNHFGIDInteger400SWAPheadwaterSWAPheadwaterString100ACTIVEDAMACTIVEDAMString100ORIG_FIDORIG_FIDInteger400ORIG_SEQORIG_SEQInteger400Functional_MilesFunctional_MilesDouble800Number_BarriersNumber_BarriersInteger400BarriersPerMileBarriersPerMileDouble800HUC8HUC8String800NameHUC8NameString12000Dist2MthDistance to mouthDouble800CatchIDCatchment IDInteger400MainChanMain channelString100US_AccumUpstream Accumulated LengthDouble800SourceIDSource IDInteger400DEVAG_PCTPercent Developed and AgricultureDouble800IMPERV_PCTPercent ImperviousDouble800AC_BUF250AC_BUF250Double800AC_NATURALAC_NATURALDouble800AC_IMPERVAC_IMPERVDouble800AC_DEVAGAC_DEVAGDouble800RivID_1RivID_1Integer400Fnode_1Fnode_1Integer400Tnode_1Tnode_1Integer400US_PCT_NATURALUS_PCT_NATURALDouble800US_PCT_DEVAGUS_PCT_DEVAGDouble800US_PCT_IMPERVUS_PCT_IMPERVDouble800LINEAR_CONLINEAR_CONDouble800US_BARRIERSUS_BARRIERSDouble800WS_INTEGRITYWS_INTEGRITYDouble800US_MILESUS_MILESDouble800Dist2Mth_1Distance to mouthDouble800CatchID_1Catchment IDInteger400HighQualityHigh QualityString100DS_BARRIERSDS_BARRIERSInteger400CONS_PCTCONS_PCTDouble800US_CONSPCTUS_CONSPCTDouble800ARMregionARMregionInteger400ARMnameARMnameString4000DIAD_CATDIAD_CATString3000The National Hydrography Dataset is a comprehensive set of digital spatial data that encodes information about naturally occurring and constructed bodies of water, paths through which water flows, and related entities. The information encoded about features includes a feature date, classification by type, other characteristics, a unique common identifier, the feature length or area, and (rarely) elevation of the surface of water pools and a description of the stage of the elevation. For reaches, encoded information includes a reach code. Names and their identifiers in the Geographic Names Information System, are assigned to most feature types. The direction of flow is encoded for networked features. The data also contains relations that encode metadata, and information that supports the exchange of future updates and improvements to the data. The names and definitions of all feature types, characteristics, and values are in the Standards for National Hydrography Dataset: Reston, Virginia, U.S. Geological Survey, 1999. The document is available online through http://mapping.usgs.gov/standards/.The names and definitions of all feature types, characteristics, and values are in U.S. Geological Survey, 1999, Standards for National Hydrography Dataset High Resolution: Reston, Virginia, U.S. Geological Survey. The document is available online through http://mapping.usgs.gov/standards/. Information about tables and fields in the data are available from the user documentation for the National Hydrography Dataset at http://nhd.usgs.gov. The National Map - Hydrography Fact Sheet is also available at: http://erg.usgs.gov/isb/pubs/factsheets/fs06002.html.20250730Statements of attribute accuracy are based on accuracy statements made for U.S. Geological Survey Digital Line Graph (DLG) data, which is estimated to be 98.5 percent. One or more of the following methods were used to test attribute accuracy: manual comparison of the source with hardcopy plots; symbolized display of the DLG on an interactive computer graphic system; selected attributes that could not be visually verified on plots or on screen were interactively queried and verified on screen. In addition, software validated feature types and characteristics against a master set of types and characteristics, checked that combinations of types and characteristics were valid, and that types and characteristics were valid for the delineation of the feature. Feature types, characteristics, and other attributes conform to the Standards for National Hydrography Dataset (USGS, 1999) as of the date they were loaded into the database. All names were validated against a current extract from the Geographic Names Information System (GNIS). The entry and identifier for the names match those in the GNIS. The association of each name to reaches has been interactively checked, however, operator error could in some cases apply a name to a wrong reach.
This statement is generally true for the most common sources of NHD data. Other sources and methods may have been used to create or update NHD data. In some cases, additional information may be found in the NHDMetadata table.Points, nodes, lines, and areas conform to topological rules. Lines intersect only at nodes, and all nodes anchor the ends of lines. Lines do not overshoot or undershoot other lines where they are supposed to meet. There are no duplicate lines. Lines bound areas and lines identify the areas to the left and right of the lines. Gaps and overlaps among areas do not exist. All areas close.The completeness of the data reflects the content of the sources, which most often are the published USGS topographic quadrangle and/or the USDA Forest Service Primary Base Series (PBS) map. The USGS topographic quadrangle is usually supplemented by Digital Orthophoto Quadrangles (DOQs). Features found on the ground may have been eliminated or generalized on the source map because of scale and legibility constraints. In general, streams longer than one mile (approximately 1.6 kilometers) were collected. Most streams that flow from a lake were collected regardless of their length. Only definite channels were collected so not all swamp/marsh features have stream/rivers delineated through them. Lake/ponds having an area greater than 6 acres were collected. Note, however, that these general rules were applied unevenly among maps during compilation. Reaches codes are defined on all features of type stream/river, canal/ditch, artificial path, coastline, and connector. Waterbody reach codes are defined on all lake/pond and most reservoir features. Names were applied from the GNIS database. Detailed capture conditions are provided for every feature type in the Standards for National Hydrography Dataset available online through http://mapping.usgs.gov/standards/.
This statement is generally true for the most common sources of NHD data. Other sources and methods may have been used to create or update NHD data. In some cases, additional information may be found in the NHDMetadata table.Statements of horizontal positional accuracy are based on accuracy statements made for U.S. Geological Survey topographic quadrangle maps. These maps were compiled to meet National Map Accuracy Standards. For horizontal accuracy, this standard is met if at least 90 percent of points tested are within 0.02 inch (at map scale) of the true position. Additional offsets to positions may have been introduced where feature density is high to improve the legibility of map symbols. In addition, the digitizing of maps is estimated to contain a horizontal positional error of less than or equal to 0.003 inch standard error (at map scale) in the two component directions relative to the source maps. Visual comparison between the map graphic (including digital scans of the graphic) and plots or digital displays of points, lines, and areas, is used as control to assess the positional accuracy of digital data. Digital map elements along the adjoining edges of data sets are aligned if they are within a 0.02 inch tolerance (at map scale). Features with like dimensionality (for example, features that all are delineated with lines), with or without like characteristics, that are within the tolerance are aligned by moving the features equally to a common point. Features outside the tolerance are not moved; instead, a feature of type connector is added to join the features.
This statement is generally true for the most common sources of NHD data. Other sources and methods may have been used to create or update NHD data. In some cases, additional information may be found in the NHDMetadata table.Statements of vertical positional accuracy for elevation of water surfaces are based on accuracy statements made for U.S. Geological Survey topographic quadrangle maps. These maps were compiled to meet National Map Accuracy Standards. For vertical accuracy, this standard is met if at least 90 percent of well-defined points tested are within one-half contour interval of the correct value. Elevations of water surface printed on the published map meet this standard; the contour intervals of the maps vary. These elevations were transcribed into the digital data; the accuracy of this transcription was checked by visual comparison between the data and the map.
This statement is generally true for the most common sources of NHD data. Other sources and methods may have been used to create or update NHD data. In some cases, additional information may be found in the NHDMetadata table.The processes used to create and maintain high-resolution NHD data can be found in the table called "NHDMetadata". Because NHD data can be downloaded using several user-defined areas, the process descriptions can vary for each download. The NHDMetadata table contains a list of all the process descriptions that apply to a particular download. These process descriptions are linked using the DuuID to the NHDFeatureToMetadata table which contains the com_ids of all the features within the download. In addition, another table, the NHDSourceCitation, can also be linked through the DuuID to determine the sources used to create or update NHD data.UnknownDataset copied.withheld20071130Metadata imported.withheld2010042116520900Dataset copied.withheld2010052016121900Dataset copied.withheld2012022113582500Dataset copied.withheld2014080614321700GIS CoordinatorNH Fish and Game Department11 Hazen DrConcordNH03301catherine.callahan@nh.govUS603-271-3014