Identification_Information: Citation: Citation_Information: Originator: U.S. Department of Agriculture, Natural Resources Conservation Service Publication_Date: 2001 Title: Level 6 Hydrologic Unit Boundaries for New Hampshire Publication_Information: Publisher: U.S. Department of Agriculture, Natural Resources Conservation Service Citation: Citation_Information: Originator: U.S. Department of Agriculture, Natural Resources Conservation Service Publication_Date: 2001 Title: Level 6 Hydrologic Unit Boundaries for New Hampshire Geospatial_Data_Presentation_Form: table, map Description: Abstract: This data set is a digital hydrologic unit boundary that is at the Sub-watershed (12-digit) level. The data set was developed by delineating the boundary lines on base maps or overlays and digitizing the delineated lines. Digital Elevation Model data may have been used in part of the process to establish preliminary boundaries. This data set consists of geo-referenced digital map data and attribute data. The map data include complete coverage of the entire state including those sub-watersheds crossing the borders of adjoining states. The hydrologic unit code attached to each delineated polygon is linked to the attribute data that contains information on acreage, modifications, type, non-contributing area and trans-basin flow. Purpose: The level 6 hydrologic unit boundaries provide a uniquely identified and uniform method of subdividing large drainage areas. These smaller sized hydrologic units (up to 40,000 acres) are useful in many programs supported by the Natural Resources Conservation Service and others. Description: Abstract: This data set is a digital hydrologic unit boundary layer that is at the Sub-watershed (12-digit) level. The digitized hydrologic units provide area extent of drainage patterns at the appropriate level of detail (Basin, Sub-basin, Watershed and Sub-watershed). Such areas are useful in planning, design, and/or evaluation of water quality and water quantity. This data set consists of geo-referenced digital map data and attribute data. The spatial data are in a statewide coverage format and include complete coverage of the entire state of New Hampshire, and small parts of surrounding states. The hydrologic unit ID code attached to each delineated polygon is linked to the attribute data. Purpose: The Watershed and Sub-watershed hydrologic unit boundaries provide a uniquely identified and uniform method of subdividing large drainage areas. These smaller sized hydrologic units (up to 250,000 acres) are useful in many programs supported by the Natural Resources Conservation Service and others. Time_Period_of_Content: Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -72.625 East_Bounding_Coordinate: -70.625 North_Bounding_Coordinate: 45.375 South_Bounding_Coordinate: 42.625 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: hydrologic units Theme_Keyword: Watershed boundary Theme_Keyword: Subwatershed boundary Place: Place_Keyword_Thesaurus: Counties and County Equivalents of the States of the United States and the District of Columbia (FIPS Pub 6-3) Place_Keyword: New England Place_Keyword: New Hampshire Access_Constraints: None Use_Constraints: The U.S. Department of Agriculture, Natural Resources Conservation Service, should be acknowledged as the data source in products derived from these data. This data set is to be used as a primary reference source. This is public information and may be interpreted by organizations, agencies, units of government, or others based on needs; however, they are responsible for the appropriate application. Federal, state, or local regulatory bodies are not to reassign to the Natural Resources Conservation Service any authority for the decisions they make. Photographic or digital enlargement of these maps to scales greater than that at which they were originally delineated can cause misrepresentation of the data. If enlarged, the maps will not include the fine detail that would be appropriate for mapping at the small scale. Digital data files are periodically updated. Files are dated, and users are responsible for obtaining the latest version of the data. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Department of Agriculture, Natural Resources Conservation Service Contact_Position: GIS Specialist Contact_Address: Address_Type: mailing address Address: 2 Madbury Road City: Durham State_or_Province: New Hampshire Postal_Code: 03824-2043 Contact_Voice_Telephone: (603) 868-7581 Contact_TDD/TTY_Telephone: 202 720 7808 (Office of Public Affairs) Contact_Facsimile_Telephone: (603) 868-5301 Cross_Reference: Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Polygon attributes are manually checked for unique code value and correct placement within this dataset and the datasets of the adjoining states. Logical_Consistency_Report: Certain node/geometry and topology (GT) polygon/chain relationships are collected or generated to satisfy topological requirements. (The GT-polygon corresponds to a hydrologic unit. Some of these requirements include: chains must begin and end at nodes, left and right GT-polygons are defined for each chain element and are consistent throughout. The tests of logical consistency are performed using vendor software. All internal polygons are tested for closure with vendor software and are checked on hard copy plots. All data are checked for common boundary lines (i.e., adjacent polygons with the same label). Completeness_Report: These data are considered complete. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The accuracy of these maps is generally based on the contour information on the 1 to 24,000 scale USGS topographic maps, Digital Raster Graphics, or DEM data available for the base maps. Such data may be supplemented with site visits to locate ridgelines for hydrologic unit boundaries in flat terrain areas, or changes in drainage patterns due to man's activities. The differences in positional accuracy between the hydrologic unit boundaries and their digitized map locations are unknown. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: New Hampshire Department of Environmental Services Publication_Date: Title: 11-Digit Watersheds for New Hampshire Geospatial_Data_Presentation_Form: Digital Geospatial Data Publication_Information: Publication_Place: Concord, New Hampshire Publisher: New Hampshire Department of Environmental Services Source_Scale_Denominator: 24,000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1994 Source_Currentness_Reference: map delineation Source_Citation_Abbreviation: NH11DIGIT Source_Contribution: Location of 11-digit Level 5 Hydrologic Unit boundaries Source_Information: Source_Citation: Citation_Information: Originator: USGS Publication_Date: 1969-1984 varies by topographic quadrangle Title: Varies by topographic quadrangle Geospatial_Data_Presentation_Form: Digital Raster Graphics Publication_Information: Publication_Place: Reston, Virginia Publisher: United States Geologic Survey Source_Citation: Citation_Information: Originator: USGS Publication_Date: 1969-1984 varies by topographic quadrangle Title: Varies by topographic quadrangle Geospatial_Data_Presentation_Form: Digital Line Graph Publication_Information: Publication_Place: Reston, Virginia Publisher: United States Geologic Survey Source_Citation: Citation_Information: Originator: USGS Publication_Date: Title: Varies by topographic quadrangle Geospatial_Data_Presentation_Form: Digital Elevation Model Publication_Information: Publication_Place: Reston, Virginia Publisher: United States Geologic Survey Source_Citation: Citation_Information: Originator: USGS Publication_Date: Title: USGS Stream Gauges Geospatial_Data_Presentation_Form: Point coordinates Publication_Information: Publication_Place: Reston, Virginia Publisher: United States Geologic Survey Source_Citation: Citation_Information: Originator: NHDES Publication_Date: 1990 Title: Dams Geospatial_Data_Presentation_Form: Digital points Publication_Information: Publication_Place: Concord, New Hampshire Publisher: New Hampshire Department of Environmental Services Source_Citation: Citation_Information: Originator: NRCS Publication_Date: pending Title: Level 6 Hydrologic Units for Maine Geospatial_Data_Presentation_Form: Digital Geospatial data Publication_Information: Publication_Place: Fort Worth, Texas Publisher: USDA, Natural Resources Conservation Service Source_Citation: Citation_Information: Originator: NRCS Publication_Date: pending Title: Level 6 Hydrologic Units for Vermont Geospatial_Data_Presentation_Form: Digital Geospatial data Publication_Information: Publication_Place: Fort Worth, Texas Publisher: USDA, Natural Resources Conservation Service Source_Citation: Citation_Information: Originator: NRCS Publication_Date: pending Title: Level 6 Hydrologic Units for Massachusetts Geospatial_Data_Presentation_Form: Digital Geospatial data Publication_Information: Publication_Place: Fort Worth, Texas Publisher: USDA, Natural Resources Conservation Service Source_Scale_Denominator: 24,000 Source_Scale_Denominator: 24,000 Source_Scale_Denominator: 24,000 Source_Scale_Denominator: unknown Source_Scale_Denominator: 24,000 Source_Scale_Denominator: 24,000 Source_Scale_Denominator: 24,000 Source_Scale_Denominator: 24,000 Type_of_Source_Media: paper Type_of_Source_Media: Mylar Type_of_Source_Media: Mylar Type_of_Source_Media: Digital Type_of_Source_Media: Mylar Type_of_Source_Media: Digital, Paper Type_of_Source_Media: Digital, Paper Type_of_Source_Media: Digital, Paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: Varies by topographic quadrangle Source_Currentness_Reference: map delineation Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: Varies by topographic quadrangle Source_Currentness_Reference: map delineation Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: Varies by topographic quadrangle Source_Currentness_Reference: map delineation Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: unknown Source_Currentness_Reference: map delineation Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1990 Source_Currentness_Reference: map delineation Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2001 Source_Currentness_Reference: map delineation Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2001 Source_Currentness_Reference: map delineation Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2001 Source_Currentness_Reference: map delineation Source_Citation_Abbreviation: USGSDRG Source_Citation_Abbreviation: USGSDLG Source_Citation_Abbreviation: USGSDEM Source_Citation_Abbreviation: USGSGAUGE Source_Citation_Abbreviation: NHDESDAM Source_Citation_Abbreviation: ME_HUC12 Source_Citation_Abbreviation: VT_HUC12 Source_Citation_Abbreviation: MA_HUC12 Source_Contribution: Location of cultural, hydrographic, hypsographic, and other physical features for hydrologic unit delineation Source_Contribution: Location of hydrographic features for watershed delineation Source_Contribution: Used to derive contour lines for watershed delineation Source_Contribution: Locations of stream flow gauges Source_Contribution: Location of dams Source_Contribution: Watershed delineation's at state boundaries Source_Contribution: Watershed delineation at state boundaries Source_Contribution: Watershed delineation at state boundaries Process_Step: Process_Description: Level 6 (12-digit) watersheds were delineated within a nested hierarchical structure using the existing Level 5 (11-digit) watershed delineation as a starting framework. The 11-digit code was reduced to 10 digits to conform to the new Federal Standards for the Delineation of Hydrologic Units Boundaries, by dropping the zero in the last position. The typical size of a level 6 watershed is 10,000 to 40,000 acres. Not all watersheds exceeding 10,000 acres are delineated. Only those watersheds that show some unique cultural, physical, or logical significance were included in the data. The order of precedence for establishing the pour point of a sub-watershed is: (1) at the outlet of a lake or pond; (2) at a confluence; (3) at some topographic feature, such as a natural gap in topography; (4) at a dam; (5) at a stream gauging station. Process_Description: Corrections were made to the existing New Hampshire Level 5 (11-digit) watershed delineation when obvious errors were noticed while delineating Level 6 watershed boundaries. Process_Description: Polygon attributing using information from DRG topographic maps, i.e., stream names used as watershed names. Process_Description: Edgematching of polygons and attributes with adjoining states Process_Description: Revision and addition of attributes to conform to updated FGDC approved standards as published in the Federal Standards for Delineation of Hydrologic Unit Boundaries, June 12, 2001 Process_Description: Review by NH Department of Environmental Services for delineation accuracy and comments. Additional corrections to the Level 5 and Level 6 delineations were made to the data as indicated by the review. Process_Description: Additional corrections to the Level 5 and Level 6 delineations were made to the data as indicated by several peer reviewers. Process_Description: A complete review was performed checking for the consistency and correctness of attributes, and edgematching of arcs and attributes to adjoining states. Source_Used_Citation_Abbreviation: NHDES11DIGIT, USGSDLG, USGSDRG, USGSGAUGE, NHDESDAM Source_Used_Citation_Abbreviation: NHDES11DIGIT, USGSDLG, USGSDRG Source_Used_Citation_Abbreviation: NHDES11DIGIT, USGSDRG Source_Used_Citation_Abbreviation: NHDES11DIGIT, USGSDRG, ME_HUC12, VT_HUC12, MA_HUC12 Source_Used_Citation_Abbreviation: Source_Used_Citation_Abbreviation: Source_Used_Citation_Abbreviation: Source_Used_Citation_Abbreviation: Process_Date: 1999-2000 Process_Date: 1999-2000 Process_Date: 1999-2000 Process_Date: 2002 Process_Date: 2001 Process_Date: 2001 Process_Date: 2001 Process_Date: 2002 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 19 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: -69 Latitude of Projection Meridian: 0.0 False_Easting: 500000 False_Northing: 0.0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.61 Ordinate_Resolution: 0.61 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257 Process_Step: META_ID: NH02 Process_Description: Corrections to data; USGS Water Science Center, Salt Lake City. Process_Date: 200903 Process_Step: Meta_ID: NH03 Process_Description: USGS, Water Science Center, Salt Lake City; Kimberly Jones. Edits to Lake Champlain Basin moving it from Region 02 to Region 04. Also updated 01110000 from Region 01 to Region 04. Craig Johnston pointed out that this unit contains the St. Francois River which flows up into Canada and then dumps into the St Lawrence River. Region 01 is Maine Coastal drainage's while region 04 is St. Lawrence drainage's, so this unit really belongs in region 04. Source_Used_Citation_Abbreviation: Process_Date: 201011 Process_Step: META_ID: NH04 Process_Description: The Line Mods, HU_Level, Linesource, DS codes and states were edited by USGS Water Science Center in Salt Lake City, Utah. Source_Used_Citation_Abbreviation: Process_Date: 201109 Process_Step: META_ID: NH05 Process_Description: USGS Water Science Center in Salt Lake City, Utah: Changes to the linework and the polys; updated the linework and the corresponding polygons, as well as the linesource codes, and downstream codes where applicable. Updated coding where applicable for new subbasins. Source_Used_Citation_Abbreviation: Process_Date: 201201 Process_Step: META_ID: NH06 - MOD updates Process_Description: edits by USGS Water Science Center in Salt Lake City, Utah. Source_Used_Citation_Abbreviation: Process_Date: 201205 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: nh_huc12.pat Entity_Type_Definition: ARC/INFO polygon attribute table Entity_Type_Definition_Source: None Attribute: Attribute_Label: Area Attribute_Definition: Area of polygon Attribute_Definition_Source: Software computed Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 327093677.97382 Range_Domain_Maximum: 2348092400.37545 Attribute_Units_of_Measure: Square feet Attribute: Attribute_Label: Acres Attribute_Definition: Area of polygon converted to acres Attribute_Definition_Source: Software computed Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 7509 Range_Domain_Maximum: 53905 Attribute_Units_of_Measure: Acres Attribute: Attribute_Label: Huc_8 Attribute_Definition: The 8 digit hydrologic unit code Attribute_Definition_Source: Federal Standards for the Delineation of Hydrologic Unit Boundaries, June 12, 2001 Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Hydrologic Unit Codes Codeset_Source: Federal Standards for the Delineation of Hydrologic Unit Boundaries, June 12, 2001 Attribute: Attribute_Label: Huc_10 Attribute_Definition: The 10 digit hydrologic unit code Attribute_Definition_Source: Federal Standards for the Delineation of Hydrologic Unit Boundaries, June 12, 2001 Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Hydrologic Unit Codes Codeset_Source: Federal Standards for the Delineation of Hydrologic Unit Boundaries, June 12, 2001 Attribute: Attribute_Label: Huc_12 Attribute_Definition: The 12 digit hydrologic unit code Attribute_Definition_Source: Federal Standards for the Delineation of Hydrologic Unit Boundaries, June 12, 2001 Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Hydrologic Unit Codes Codeset_Source: Federal Standards for the Delineation of Hydrologic Unit Boundaries, June 12, 2001 Attribute: Attribute_Label: HU_6_NAME Attribute_Definition: The 6 digit hydrologic unit name Attribute_Definition_Source: None Attribute_Domain_Values: Unrepresentable_Domain: Character Field Attribute: Attribute_Label: HU_8_NAME Attribute_Definition: The 8 digit hydrologic unit name Attribute_Definition_Source: None Attribute_Domain_Values: Unrepresentable_Domain: Character Field Attribute: Attribute_Label: HU_10_NAME Attribute_Definition: The 10 digit hydrologic unit name Attribute_Definition_Source: None Attribute_Domain_Values: Unrepresentable_Domain: Character Field Attribute: Attribute_Label: HU_12_NAME Attribute_Definition: The 12 digit hydrologic unit name Attribute_Definition_Source: None Attribute_Domain_Values: Unrepresentable_Domain: Character Field Attribute: Attribute_Label: HU_10_MOD Attribute_Definition: Modifications to the natural overland present in the 10-digit watershed. Attribute_Definition_Source: Federal Standards for the Delineation of Hydrologic Units Boundaries, June 12, 2001 Attribute_Domain_Values: Codeset_Domain: Attribute: Attribute_Label: HU_10_TYPE Attribute_Definition: Types defined by the codeset Attribute_Definition_Source: Federal Standards for the Delineation of Hydrologic Units Boundaries, June 12, 2001 Attribute_Domain_Values: Codeset_Domain: Attribute: Attribute_Label: HU_12_MOD Attribute_Definition: Modifications to the natural overland present in the 12-digit watershed. Attribute_Definition_Source: Federal Standards for the Delineation of Hydrologic Units Boundaries, June 12, 2001 Attribute_Domain_Values: Codeset_Domain: Attribute: Attribute_Label: HU_12_TYPE Attribute_Definition: Watershed Types defined by the codeset Attribute_Definition_Source: Federal Standards for the Delineation of Hydrologic Units Boundaries, June 12, 2001 Attribute_Domain_Values: Codeset_Domain: Attribute: Attribute_Label: HU_10_DS Attribute_Definition: The 10-digit code of the 5th level hydrologic unit that is receiving the majority of the flow from the watershed. Attribute_Definition_Source: Federal Standards for the Delineation of Hydrologic Units Boundaries, June 12, 2001 Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Hydrologic Unit Codes Attribute: Attribute_Label: HU_12_DS Attribute_Definition: The 12-digit code of the 6th level hydrologic unit that is receiving the majority of the flow from the watershed. Attribute_Definition_Source: Federal Standards for the Delineation of Hydrologic Units Boundaries, June 12, 2001 Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Hydrologic Unit Codes Attribute: Attribute_Label: Ncontrib_a Attribute_Definition: Non-contributing drainage areas that do not flow toward the outlet of any hydrologic unit. Attribute_Definition_Source: Federal Standards for the Delineation of Hydrologic Units Boundaries, June 12, 2001 Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Hydrologic Unit Codes Attribute: Attribute_Label: NH11DIGIT Attribute_Definition: The previous 11-digit hydrologic unit code designation for the watershed. Attribute_Definition_Source: USDA, Natural Resources Conservation Service Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Hydrologic Unit Codes Detailed_Description: Entity_Type: Entity_Type_Label: nh_huc12.aat Entity_Type_Definition: ARC/INFO arc attribute table Entity_Type_Definition_Source: None Attribute: Attribute_Label: HU_LEVEL Attribute_Definition: The level of the hydrologic unit that the arc is the boundary. Attribute_Definition_Source: USDA, Natural Resources Conservation Service Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Hydrologic Unit Boundary Codes Attribute: Attribute_Label: LINESOURCE Attribute_Definition: The base map source used to delineate the hydrologic units. Attribute_Definition_Source: Federal Standards for the Delineation of Hydrologic Unit Boundaries, June 12, 2001 Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Line Spatial Data Source Codeset_Source: Federal Standards for the Delineation of Hydrologic Unit Boundaries, June 12, 2001 Attribute: Attribute_Label: META_ID Attribute_Definition: Metadata ID is a code that identifies which metadata file applies to the arc. In most cases there will be only one metadata file. Attribute_Definition_Source: Federal Standards for the Delineation of Hydrologic Unit Boundaries, June 12, 2001 Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Line Spatial Data Source Codeset_Source: Federal Standards for the Delineation of Hydrologic Unit Boundaries, June 12, 2001 Overview_Description: Entity_and_Attribute_Overview: This is a description of attributes by field from the Federal Standards for Delineation of Hydrologic Unit Boundaries 1) Polygon attributes Huc_8 : Eight Digit Hydrologic Unit Code A unique 8-digit code from the USGS map series "Hydrologic Unit Maps". The same number was used in every record that pertains to a subwatershed that resides within the same 8-digit sub-basin.Numbers were assigned in an upstream to downstream fashion. Where no downstream/upstream relationship could be determined numbers were assigned in a clockwise fashion. Huc_10: Ten Digit Hydrologic Unit Code This field provides a unique 10-digit code for each watershed. This same number was used in every record that pertains to a subwatershed that resides within the same 10-digit watershed. Numbers were assigned in an upstream to downstream fashion. Where no downstream/upstream relationship could be determined numbers were assigned in a clockwise fashion. Huc_12: Twelve Digit Hydrologic Unit Code This field provides a unique 12-digit code for each subwatershed. Numbers were assigned in an upstream to downstream fashion. Where no downstream/upstream relationship could be determined numbers were assigned in a clockwise fashion. Acres: Acres Area of subwatershed including non-contributing areas calculated to acres as a whole number, no decimals. The "Acres" field was calculated from the "Area" field. States: States The "States" field includes the names of all state(s) that the subwatershed falls within. The 2-digit postal abbreviation in upper case and in alphabetical order was used, separated with a comma. Ncontrb_a: Non-Contributing Area Drainage areas that do not flow toward the outlet of any hydrologic unit are considered non-contributing. If a non-contributing area is on the boundary between two or more hydrologic units, the non-contributing area is associated with the hydrologic unit adjacent to the low point on the boundary. This attribute should be the total of the non-contributing areas within a hydrologic unit calculated in acres. Hu_10_ds: Fifth Level Downstream Hydrologic Unit Code This field has the 10-digit code of the 5th level hydrologic unit that is receiving the majority of the flow from the watershed that the 6th level HU falls within. Outlets created by ditching or other artificial drainage were not considered for this field. If an HU flows into an ocean or the Gulf of Mexico, this field was populated with "OCEAN" and if a HU flows into one of the Great Lakes the term "LAKE" was used. If a HU flows across international borders, "CANADA" or "MEXICO" was used depending on which country the HU drains into. If an HU is a closed basin, then the term "CLOSED BASIN"was used. Hu_10_name: Fifth Level Hydrologic Unit Name This field used officially recognized names only. This field was populated by following the directions in subsection 6.3 "Watershed and Subwatershed Naming Protocol". The name used to attribute the watershed was used only once within a 4th level unit. Hu_10_mod: Fifth Level Hydrologic Unit Modifications This field identifies any type of modifications to natural overland flow that alters the location of the hydrologic unit boundary for a 10-digit watershed. This field shows the most significant to least significant modification(s) to the watershed boundary. One or more of the following abbreviations was used. SC - Stormwater Canal or Drainage Canal ID - Irrigation Ditch IT - Interbasin Transfer BC - Barge Canal or Navigation Canal SD - Stormwater Ditch PD - Pipe Diversion CD - Channel Diversion NC - Noncontributing Area KA - Karst LE - Levee NM - No Modifications OC - Overflow Channel or Flume DM - Dam at outlet or HU boundary GC - General Canal/Ditch PS - Pumping Station DD - Drainage Ditch SI - Siphon AD - Aqueduct RS - Reservoir TF - Transportation Feature (road, railroad, docks etc.) GF - Ground-Water Flow MA - Mining Activity UA - Urban Area GL - Glacier IF - Ice Field OF - Overbank Flow OT - Other Hu_10_type: Fifth Level Hydrologic Unit Type This field was populated with the hydrologic unit type from the list provided that most closely identifies the watershed. S - "Standard" hydrologic unit - Any land HU with drainage flowing to a single outlet point, excluding non-contributing areas. This includes areas or small triangular wedges between adjacent HU's that remain after classic hydrologic units are delineated. Some examples include "true", "classic", "composite", and "remnant" hydrologic units. C - "Closed Basin" hydrologic unit - A drainage area that is 100% non-contributing. This means all surface flow is internal, no overland flow leaves the hydrologic unit through the outlet point. F - "Frontal" hydrologic unit - Areas along the coastline of lakes, oceans, bays, etc. that have more than one outlet. These HU's are predominantly land with some water areas at or near the outlet(s). M - “Multiple Outlet” hydrologic unit An area that has more than one natural outlet; for example, an outlet located on a stream with multiple channels. This does not include frontal or water hydrologic units, hydrologic units with artificial interbasin transfers, drainage outlets through karst or ground-water flow, or outlets that cross a stream with an island. This code should be used only in rare instances. W - "Water" hydrologic unit - Hydrologic units that are predominantly water with adjacent land areas, ex. lake, easturies, harbors. I - "Island" hydrologic unit - A hydrologic unit that is one or more islands and adjacent water out to the toe of the shore face. U - "Unclassified" hydrologic unit - A hydrologic unit that can't be defined or doesn't fit into one of the types that have been listed. Hu_12_ds: Sixth Level Downstream Hydrologic Unit Code This field was populated with the 12-digit code of the 6th level hydrologic unit that is receiving the majority of the flow from the subwatershed. Outlets created by ditching or other artificial drainage were not considered for this field. If a HU flows into an ocean or the Gulf of Mexico it was populate with "OCEAN" and if a HU flows into one of the Great Lakes the term "LAKE" was used. If a HU flows across international borders, "CANADA" or "MEXICO" was used depending on which country the HU drains into. If an HU is a closed basin, this field was populated with the term "CLOSED BASIN". Hu_12_name: Sixth Level Hydrologic Unit Name Officially recognized names were used in this field. This field was populated by following the directions in subsection 6.3 "Watershed and Subwatershed Naming Protocol". The name used to attribute the subwatershed was used only once within a 4th level unit. Hu_12_mod: Sixth Level Hydrologic Unit Modifications This field identifies any type of man-made modification(s) to natural overland flow that alters the location of the hydrologic unit boundary for a 12-digit subwatershed. One or more of the following abbreviations was chosen for this field. SC - Stormwater Canal or Drainage Canal ID - Irrigation Ditch IT - Interbasin Transfer BC - Barge Canal or Navigation Canal SD - Stormwater Ditch PD - Pipe Diversion CD - Channel Diversion NC - Noncontributing Area KA - Karst LE - Levee NM - No Modifications OC - Overflow Channel or Flume DM - Dam at outlet or HU boundary GC - General Canal/Ditch PS - Pumping Station DD - Drainage Ditch SI - Siphon AD - Aqueduct RS - Reservoir TF - Transportation Feature (road, railroad, docks etc.) GF - Ground-Water Flow MA - Mining Activity UA - Urban Area GL - Glacier IF - Ice Field OF - Overbank Flow OT - Other Hu_12_type: Sixth Level Hydrologic Unit Type This field was populated with the hydrologic unit type from the list provided that most closely identifies the subwatershed. S - "Standard" hydrologic unit - Any land HU with drainage flowing to a single outlet point, excluding non-contributing areas. This includes areas or small triangular wedges between adjacent HU's that remain after classic hydrologic units are delineated. Some examples include "true", "classic", "composite", and "remnant" hydrologic units. C - "Closed Basin" hydrologic unit - A drainage area that is 100% non-contributing. This means all surface flow is internal, no overland flow leaves the hydrologic unit through the outlet point. F - "Frontal" hydrologic unit - Areas along the coastline of lakes, oceans, bays, etc. that have more than one outlet. These HU's are predominantly land with some water at or near the outlet(s). M - “Multiple Outlet” hydrologic unit An area that has more than one natural outlet; for example, an outlet located on a stream with multiple channels. This does not include frontal or water hydrologic units, hydrologic units with artificial interbasin transfers, drainage outlets through karst or ground-water flow, or outlets that cross a stream with an island. This code should be used only in rare instances. W - "Water" hydrologic unit - Hydrologic units that are predominantly water with adjacent land areas, ex. lake, easturies. I - "Island" hydrologic unit - A hydrologic unit that is one or more islands and adjacent water out to the toe of the shore face. U - "Unclassified" hydrologic unit - A hydrologic unit that can't be defined or doesn't fit into one of the types that have been listed. 2) Line attributes Hu_level: Hydrologic Unit Level This field provides the means to create cartographically pleasing maps. This field is populated with the highest hydrologic unit level (smallest number) for the line (arc) represented by the record. The attribute was recorded using numbers 1 through 6 representing each level with 1 being the highest and 6 the lowest level. An example would be if a line represents a region, subregion, basin, subbasin, watershed, and subwatershed boundary, then this cell was populated with a 1 (Region). Below is a list of numbers used for each level. Level Digit# Name 1 2 Region 2 4 Subregion 3 6 Basin 4 8 Subbasin 5 10 Watershed 6 12 Subwatershed Linesource: Line Spatial Data Source The Linesource indicates the base map source(s) used to delineate at 1:24,000 scale. The field was populated using one of the standardized code(s) listed below. If more than one code was used, then a comma was used to separate the codes. TOPO24 - Delineation from hardcopy 1:24,000 scale topographic maps TOPO25 - Delineation from hardcopy 1:25,000 topgraphic maps, only Alaska and Caribbean TOPO63 - Delineation from hardcopy 1:63,360 topographic maps, only Alaska and Caribbean DRG24 - Delineation from 1:24,000 scale Digital Raster Graphics DRG25 - Delineation from 1:25,000 Digital Raster Graphics, only Alaska and Caribbean DRG63 - Delineation from 1:63,360 Digital Raster Graphics, only Alaska and Caribbean DEM10 - Derived from 10 meter Digital Elevation Model DEM30 - Derived from 30 meter Digital Elevation Model NED30 - Derived from 30 meter National Elevation Dateset Model EDNA30 - (formally NED-H), derived from 30 meter Elevation Derivatives for National Applications BATH"scale" (ex. BATH24) - Interpreted from NOAA 1:24,000 scale bathymetric data HYPSO"scale" (ex. HYPSO24)- Delineated from 1:24,000 scale contour data ORTHO"scale" (ex. ORTHO12) - Interpreted from 1:12,000 scale Ortho-imagery DEDEM10 - Drainage enforced 10 meter Digital Elevation Model DEDEM30 - Drainage enforced 30 meter Digital Elevation Model GPS - Derived from Global Positioning System LIDAR - Derived from LIDAR IFSAR - Derived from IFSAR data OTH - Other UNK - Unknown All other reference and source maps not listed should be noted in the metadata. Meta_id: Metadata ID Number The Metadata ID is a code that identifies which metadata file applies to the arc. In most cases there is only one metadata file. However, in some cases more than one metadata file was used to identify different groups and/or procedures used to produce the lines. The metadata ID is a 4-character code starting with the 2-letter state postal code, followed by a 2-digit sequence number. For example "OK01", "ID02", etc Entity_and_Attribute_Detail_Citation: Federal Standards for the Delineation of Hydrologic Units Boundaries, June 12, 2001. Online Linkage: http://www.ftw.nrcs.usda.gov/huc_data.html Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Department of Agriculture, Natural Resources Conservation Service, National Cartography and Geospatial Center Contact_Address: Address_Type: mailing address Address: P.O. Box 6567 City: Fort Worth State, Parish or Province: Texas Postal Zone: 76115 Contact_Voice_Telephone: 817 334 5559 Contact_Facsimile_Telephone: 817 334 5469 Resource_Description: New Hampshire Level 6 HU Boundary Distribution_Liability: Although these data have been processed successfully on a computer system at the U.S. Department of Agriculture, no warranty expressed or implied is made by the agency regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. The U.S. Department of Agriculture will warrant the delivery of this product in computer readable format, and will offer appropriate adjustment of credit when the product is determined unreadable by correctly adjusted computer input peripherals, or when the physical medium is delivered in damaged condition. Request for adjustment of credit must be made within 90 days from the date of this shipment from the ordering site. Neither the U.S. Department of Agriculture, nor any of its agencies are liable for misuse of the data. Nor is it liable for damage, transmission of viruses, or computer contamination through the distribution of these data sets. The United States Department of Agriculture (USDA) prohibits discrimination in its programs on the basis of race, color, national origin, sex, religion, age, disability, political beliefs and marital or familial status. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of program information (Braille, large print, audio tape, etc.) should contact the USDA Office of Communications at (202) 720-5881 (voice) or (202) 720-7808 (TDD). To file a complaint, write the Secretary of Agriculture, U.S. Department of Agriculture, Washington, D.C. 20250, or call (202) 720-7327 (voice) or (202) 720-4107 (TDD). USDA is an equal opportunity employer. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ESRI ARC Interchange file, Version 7.0.4 Format_Version_Date: 19960121 Format_Specification: Format Content Information: spatial, keys, and attributes Transfer_Size: 5.71 M Digital_Transfer_Option: Offline_Option: Recording_Capacity: Recording_Density: 2.3 Recording_Density_Units: gigabytes Recording_Format: tar Digital_Transfer_Option: Offline_Option: Recording_Capacity: Recording_Density: 150 Recording_Density_Units: megabytes Recording_Capacity: Recording_Density: 150 Recording_Density_Units: megabytes Recording_Format: tar Off-line Option Off-line Media: CD-ROM Recording_Format: tar Fees: The charge for one data set is $XX.XX. A data set is the complete set of hydrologic unit boundaries for the state and includes both spatial and attribute data. Ordering_Instructions: Call or write to organization listed under Distributor. Spatial line and attribute data are usually distributed as ESRI ARC Interchange files, but can be provided in a format that is user specified. Turnaround: 10 working days Metadata_Reference_Information: Metadata_Date: 20020208 Metadata_Review_Date: Metadata_Future_Review_Date: Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Department of Agriculture, Natural Resources Conservation Service Contact_Position: GIS Specialist Contact_Address: Address_Type: mailing address Address: 2 Madbury Road City: Durham State_or_Province: New Hampshire Postal_Code: 03824-2043 Contact_Voice_Telephone: (603) 868-7581 Contact_Facsimile_Telephone: (603) 868 5301 Metadata_Standard_Name: Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998