Identification_Information: Citation: Citation_Information: Originator: USDA-NRCS, Rhode Island State Office/Service Center Publication_Date: 20071231 Publication_Time: Unknown Title: Rhode Island Watershed Boundary Dataset Edition: 1 Geospatial_Data_Presentation_Form: vector digital data Publication_Information: Publication_Place: Warwick, Rhode Island Publisher: United States Department of Agriculture - Natural Resource Conservation Service Description: Abstract: This data set is a complete digital hydrologic unit boundary layer to the Subwatershed (12-digit) 6th level for the State of Rhode Island. This data set consists of geo-referenced digital data and associated attributes created in accordance with the "FGDC Proposal, Version 2.0 - Federal Standards For Delineation of Hydrologic Unit Boundaries 10/01/04"(http://www.ftw.nrcs.usda.gov/huc_data.html). Polygons are attributed with hydrologic unit codes for 4th level sub-basins, 5th level watersheds, 6th level subwatersheds, name, size, downstream hydrologic unit, type of watershed, non-contributing areas and flow modification. Arcs are attributed with the highest hydrologic unit code for each watershed, linesource and a metadata reference file. Purpose: The Watershed and Subwatershed hydrologic unit boundaries provide a uniquely identified and uniform method of subdividing large drainage areas. The smaller sized 6th level sub-watersheds (up to 40,000 acres) are useful for numerous application programs supported by a variety of local, State, and Federal Agencies. This data set is intended to be used as a tool for water-resource management and planning activities, particularly for site-specific and localized studies requiring a level of detail provided by large-scale map information. The dataset will be appended to a larger seamless nationally consistant geospatial database as other states complete their portion of the watershed boundary dataset. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20071231 Time_of_Day: unknown Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -71.934206 East_Bounding_Coordinate: -71.024489 North_Bounding_Coordinate: 42.223519 South_Bounding_Coordinate: 41.146161 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: InlandWaters, 012 Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Hydrologic Units Theme_Keyword: Hydrologic Unit Code Theme_Keyword: Region Theme_Keyword: HUC Theme_Keyword: Sub-Region Theme_Keyword: Basin Theme_Keyword: Sub-Basin Theme_Keyword: Watershed Theme_Keyword: Watershed Boundaries Theme_Keyword: boundaries Theme_Keyword: Subwatershed Theme_Keyword: WBD Theme_Keyword: Watershed Boundary Dataset 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: Rhode Island Access_Constraints: None Use_Constraints: The distributor shall not be held liable for improper or incorrect use of this data, based on the description of appropriate/inappropriate uses described in this metadata document. It is strongly recommended that this data is directly acquired from the distributor and not indirectly through other sources which may have changed the data in some way. These data should not be used at scales greater than 1:24,000 for the purpose of identifying hydrographic watershed boundary feature locations in 7. 5 should be acknowledged as the data source in products derived from these data. The 7 Watershed Boundary Dataset is public information and may be interpreted by all organizations, agencies, units of government, or others based on needs; however, they are responsible for the appropriate application of the data. Federal, State, or local regulatory bodies are not to reassign to the Natural Resources Conservation Service any authority for the decisions they make. The Natural Resources Conservation Service will not perform any evaluations of these maps or purposes related solely to State or local regulatory programs. Photographic or digital enlargement of these maps to scales greater than that at which they were originally delineated can result in 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 from the source distributor. 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 and physical address Address: 60 Quaker Lane, Suite 46 City: Warwick State_or_Province: Rhode Island Postal_Code: 02886-0111 Country: USA Contact_Voice_Telephone: (401) 822-8829 Contact_TDD/TTY_Telephone: (202) 720-7808 Contact_Facsimile_Telephone: (401) 828-0433 Contact_Electronic_Mail_Address: na Hours_of_Service: 8:30am to 4:00pm (EST) M-F Data_Set_Credit: Funding for the Rhode Island Watershed Boundary Dataset (WBD) was provided by the USDA-NRCS,USEPA. Representatives from the Rhode Island Department of Environmental Management contributed a substantial amount of time and salary towards quality review of the dataset. Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.2.1350 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Polygon identifiers are manually checked with the original base map using the attribute file. Verification on polygon identification continuity on each side of a neatline is done visually on the screen as adjacent quad representations are assembled into larger area data layers. Logical_Consistency_Report: features stored in an ESRI File Geodatabase format represent watershed boundaries digitized in compliance with the "Federal Standards for Delineation of Hydrologic Unit Boundaries; Verion 2, October1, 2004" The following topological reviews have been succesfully completed: Create a new topology inside this geodatabase feature dataset. Associate the arc, polygon and centroid feature classes with this topology. Rank the arc feature class with a 1. Rank the polygon feature class with a 2. Rank the centroid feature class with a 1. Apply topology rules to arcs and polygons: To the arcs, apply these rules: Must Not Overlap Must Not Intersect Must Not Have Dangles Must Not Have Pseudos Must Not Self-Overlap Must Not Self-Intersect Must be covered by boundary of (polygon file) To the polygons, apply these rules: Must Not Overlap Must Not Have Gaps Boundary must be covered by (arc file) Completeness_Report: All fields for all polygons in the polygon attribute table are attributed. Some polygons in the Ncontrb_a field might have a 0 value. All fields for the lines in the arc attribute table are attributed. The lines adjacent to the universal polygon are attributed with a 0 for the hu_level. These cannot be attributed until the adjacent states complete their linework at which point the highest level of hydrologic unit can be determined. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The accuracy of these maps is generally based on the contour information of corresponding DRGs. The differences in positional accuracy between the hydrologic unit boundaries and their digitized map locations has not been tested Hydrologic unit boundaries generally were digitized within 0.01 inches of their locations on the digitizing source. Edge match locations are exact because the data were extracted from a New England-based hydrologic units layer which had been electronically edge-matched. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Not Tested Lineage: Source_Information: Source_Citation: Citation_Information: Originator: USDA-Natural Resources Conservation Service Publication_Date: 20030101 Publication_Time: Unknown Title: Sub-Watersheds of Rhode Island Geospatial_Data_Presentation_Form: vector digital data Publication_Information: Publication_Place: Warwick, Rhode Island Publisher: USDA-Natural Resources Conservation Service Online_Linkage: NA Source_Scale_Denominator: 24000 Type_of_Source_Media: USGS Digital Raster Graphics and paper topographic quadrangles Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1970 Beginning_Time: unknown Ending_Date: 1987 Ending_Time: unknown Source_Currentness_Reference: publication date Source_Citation_Abbreviation: NRCS Source_Contribution: map delineation Process_Step: Process_Description: The waters of Narragansett Bay were divided in the "Geographic Segments of Narragansett Bay" coverage created by the Narragansett Bay Project in 1994. The watersheds for these bay segments were delineated and digitized from paper copy topographic maps using Arc Info software by NRCS staff. (Narragansett Bay Project did not create metadata for the bay segment coverage.) Source_Used_Citation_Abbreviation: NRCS Process_Date: 1997 Process_Step: Process_Description: Rhode Island Geographic Information System (RIGIS) coverages for Basins and Subbasins (S44hdb90 and S44hsb90) were modified to fit standards for HUC -- aggregation to create appropriate HUC levels. Documentation for the RIGIS coverages is poor, however the data was the result of a cooperative effort between NRCS (Warwick), USGS-Water Resource Division (Providence), RI Water Resource Board, RI Division of Statewide Planning and the RI Dept of Environmental Management Watershed boundaries were hand drafted onto mylar quad maps and manually digitized Source_Used_Citation_Abbreviation: NRCS Process_Date: 1997 Process_Step: Process_Description: Data layer attribution, editing, review by RI/IRT NRCS and RIGIS personnel; USGS Source_Used_Citation_Abbreviation: NRCS Process_Date: 1998 Process_Step: Process_Description: Basin coverages from MA and CT were edge-matched to the RI HUC8. Since the Blackstone (?PJ - 2007) and Quinebaug Subbasins do not drain into RI, few subdivisions were made past the HUC8 level. HUC 10 and HUC 12 delineations were made by NRCS staff to match CT and MA HUC 10 and 12 delineations. On-screen digitizing was done over DRG basemap Source_Used_Citation_Abbreviation: NRCS Process_Date: 1998 Process_Step: Process_Description: Additional subdivisions were made in the Pawcatuck Subbasin from paper copy topographic maps using Arc Info software by NRCS staff to fit local needs and meet the HUC standards. Source_Used_Citation_Abbreviation: NRCS Process_Date: 1999 Process_Step: Process_Description: Review and editing/combining of smaller subwatersheds to better meet National Standard Source_Used_Citation_Abbreviation: NRCS Process_Date: 2000 Process_Step: Process_Description: Attribute edits to update layer to newest Hydrologic Unit Digitizing Standard Source_Used_Citation_Abbreviation: NRCS Process_Date: 2001 Process_Step: Process_Description: Draft HUC maps were presented to the major data users in the state for review. Agreement was reached among the agencies (local, state and federal) that the proposed 8, 10 and 12 level units met the standard for HUC with the exception of the coastal areas since the standard for the delineation of coastal areas has not been approved. The coastal delineations will need to be re-visited once the standard is established Source_Used_Citation_Abbreviation: NRCS Process_Date: 2002 Process_Step: Process_Description: HUC12 watershed boundaries for all watersheds intersecting RI were edited/updated by EPA Region 5 in order to meet that agencies regulatory data needs. All work was performed in accordance with reguirements & standards set forth in the "Federal Standards for Delineation of Hydrologic Unit Boundaries; Version 2.0, October 1, 2004. All edits were reviewed and verified by the RI Dept of Environmental Management and the Warwick, RI office of NRCS. With one exception, the resulting watershed boundaries do not conflict with the certified WBD of neighboring states. The exception occurs in the 6th level watersheds identified as follows: 010900030207, 010900040401 and 010900030208. The areas draining to "Cranberry Ponds" and thence to "Happy Hollow Pond" required alteration and will need to be resolved with the certified WBD for Massachusetts. Process_Date: 20071201 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Joan Rogers Contact_Organization: US EPA Region 5 Contact_Position: Research Associate Contact_Address: Address_Type: mailing and physical address Address: EPA Region 5 Address: 77 W. Jackson Blve City: Chicago State_or_Province: Illinois Postal_Code: 60604 Country: USA Contact_Voice_Telephone: 312-886-2785 Contact_TDD/TTY_Telephone: na Contact_Facsimile_Telephone: na Contact_Electronic_Mail_Address: rogers.joan@epa.gov Contact_Instructions: please e-mail questions or comments Process_Step: Process_Description: Dataset copied. Source_Used_Citation_Abbreviation: \\6SPVR41\work\watersheds\WBD\wbd.gdb Process_Step: META_ID: RI02 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 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: G-polygon Point_and_Vector_Object_Count: 59 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.000000008983153 Longitude_Resolution: 0.000000008983153 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257222 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Resolution: 0.001000 Altitude_Encoding_Method: Explicit elevation coordinate included with horizontal coordinates Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: WBD_poly Entity_Type_Definition: identifies watershed boundaries Entity_Type_Definition_Source: n/a Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: OBJECTID_1 Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: OBJECTID Attribute: Attribute_Label: NE12_ Attribute: Attribute_Label: NE12_ID Attribute: Attribute_Label: HUC_8 Attribute: Attribute_Label: HUC_10 Attribute: Attribute_Label: HUC_12 Attribute: Attribute_Label: STATES Attribute: Attribute_Label: NCONTRB_A Attribute: Attribute_Label: HU_10_DS Attribute: Attribute_Label: HU_10_NAME Attribute: Attribute_Label: HU_10_MOD Attribute: Attribute_Label: HU_10_TYPE Attribute: Attribute_Label: HU_12_DS Attribute: Attribute_Label: HU_12_NAME Attribute: Attribute_Label: HU_12_MOD Attribute: Attribute_Label: HU_12_TYPE Attribute: Attribute_Label: OUTLET_TOW Attribute: Attribute_Label: REGION Attribute: Attribute_Label: SUBREGION Attribute: Attribute_Label: BASIN Attribute: Attribute_Label: SUBBASIN Attribute: Attribute_Label: CT_SRBASIN Attribute: Attribute_Label: CT_REGBASI Attribute: Attribute_Label: CK Attribute: Attribute_Label: HUC_2 Attribute: Attribute_Label: HUC_4 Attribute: Attribute_Label: HUC_6 Attribute: Attribute_Label: SB_CONDITI Attribute: Attribute_Label: CODE_10 Attribute: Attribute_Label: CODE_12 Attribute: Attribute_Label: ACRES Attribute: Attribute_Label: Shape_Length Attribute_Definition: Length of feature in internal units. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Attribute: Attribute_Label: Shape_Area Attribute_Definition: Area of feature in internal units squared. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Detailed_Description: Entity_Type: Entity_Type_Label: 43.pat Entity_Type_Definition: polygons identify watershed boundaries Entity_Type_Definition_Source: n/a Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: AREA Attribute_Definition: Area of feature in internal units squared. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Attribute: Attribute_Label: PERIMETER Attribute_Definition: Perimeter of feature in internal units. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Attribute: Attribute_Label: 43 # Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: 43-ID Attribute_Definition: User-defined feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: HUC_8 Attribute_Definition: 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. Attribute_Definition_Source: Federal Standards for Delineation of Hydrologic Unit Boundaries Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values Attribute: Attribute_Label: HUC_10 Attribute_Definition: This field provides a unique 10-digit code for each watershed derived from the 8-digit code. This same number was used in every record that pertains to a subwatershed that resides within the same 10-digit watershed. Attribute_Definition_Source: Federal Standards for Delineation of Hydrologic Unit Boundaries Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values Attribute: Attribute_Label: HUC_12 Attribute_Definition: This field provides a unique 12-digit code for each subwatershed derived from the 10-digit code. Attribute_Definition_Source: Federal Standards for Delineation of Hydrologic Unit Boundaries Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values Attribute: Attribute_Label: ACRES Attribute_Definition: Area of subwatershed including non-contributing areas calculated to acres as a whole number, no decimals. Attribute_Definition_Source: Federal Standards for Delineation of Hydrologic Unit Boundaries Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values Attribute: Attribute_Label: STATES Attribute_Definition: The "States" field includes the names of all state(s) that the subwatershed falls within. Attribute_Definition_Source: Federal Standards for Delineation of Hydrologic Unit Boundaries Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values Attribute: Attribute_Label: NCONTRB_A Attribute_Definition: Drainage areas that do not flow toward the outlet of any hydrologic unit are considered non-contributing. Attribute_Definition_Source: Federal Standards for Delineation of Hydrologic Unit Boundaries Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values 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 that the 6th level HU falls within. Outlets created by ditching or other artificial drainage were not considered for this field. Attribute_Definition_Source: Federal Standards for Delineation of Hydrologic Unit Boundaries Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values Attribute: Attribute_Label: HU_10_NAME Attribute_Definition: A unique name for each 5th level hydrologic unit that relates to the major water feature within the polygon or the major water body it contributes to Attribute_Definition_Source: Federal Standards for Delineation of Hydrologic Unit Boundaries Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values Attribute: Attribute_Label: HU_10_MOD Attribute_Definition: This field identifies interbasin transfers (IT), dams at outlet (DM), etc. that modify natural overland flow as modifications are identified from most significant to least significant modification(s). Hydrologic units with no modification are marked with NM. Attribute_Definition_Source: Modification by 1 to the Federal Standards for Delineation of Hydrologic Unit Boundaries Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values Attribute: Attribute_Label: HU_10_TYPE Attribute_Definition: This field identifies the type of watershed. Attribute_Definition_Source: Federal Standards for Delineation of Hydrologic Unit Boundaries Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values Attribute: Attribute_Label: HU_12_DS Attribute_Definition: The 12-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. Attribute_Definition_Source: Federal Standards for Delineation of Hydrologic Unit Boundaries Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values Attribute: Attribute_Label: HU_12_NAME Attribute_Definition: A unique name for each 6th level hydrologic unit that relates to the major water feature within the polygon or the major water body it contributes to Attribute_Definition_Source: Federal Standards for Delineation of Hydrologic Unit Boundaries Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values Attribute: Attribute_Label: HU_12_MOD Attribute_Definition: This field identifies interbasin transfers (IT), dams at outlet (DM), etc. that modify natural overland flow as Modifications are identified from most significant to least significant modification(s). Hydrologic units with no modification are marked with NM. Attribute_Definition_Source: Federal Standards for Delineation of Hydrologic Unit Boundaries Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values Attribute: Attribute_Label: HU_12_TYPE Attribute_Definition: This field identifies the type of watershed. Attribute_Definition_Source: Federal Standards for Delineation of Hydrologic Unit Boundaries Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values 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 Standard for Delineation of Hydrologic Unit Boundaries 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_or_Province: Texas Postal_Code: 76115 Country: USA Contact_Voice_Telephone: (817) 509-3384 Contact_Facsimile_Telephone: (817) 509-3469 Contact_Electronic_Mail_Address: 20 Contact_Instructions: please e-mail with data requests. Resource_Description: Downloadable Data Distribution_Liability: The distributor shall not be held liable for improper or incorrect use of this data, based on the description of appropriate/inappropriate uses described in this metadata document. It is strongly recommended that this data is directly acquired from the distributor and not indirectly through other sources which may have changed the data in some way. These data should not be used at scales greater than 1:24,000 for the purpose of identifying hydrographic watershed boundary feature locations in 7 . 5 makes no claims for the data's suitability for other purposes. 5 should be acknowledged as the data source in products derived from these data. The 7 Watershed Boundary Dataset is public information and may be interpreted by all organizations, agencies, units of government, or others based on needs; however, they are responsible for the appropriate application of the data. Federal, State, or local regulatory bodies are not to reassign to the 5 or the Natural Resources Conservation Service any authority for the decisions they make. The Natural Resources Conservation Service will not perform any evaluations of these maps or purposes related solely to State or local regulatory programs. Photographic or digital enlargement of these maps to scales greater than that at which they were originally delineated can result in 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 from the source distributor. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: unknown File_Decompression_Technique: no compression applied Transfer_Size: unknown Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: unknown Fees: none Metadata_Reference_Information: Metadata_Date: 20080130 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Rhode Island Department of Environmental Management Contact_Person: Paul Jordan Contact_Position: Supervising GIS Specialist Contact_Address: Address_Type: mailing and physical address Address: RIDEM / Office of Planning & Development Address: 235 Promenade Street City: Providence State_or_Province: Rhode Island Postal_Code: 02908 Country: USA Contact_Voice_Telephone: (401) 222-2776 Contact_Facsimile_Telephone: (401) 222-2069 Contact_Electronic_Mail_Address: paul.jordan@dem.ri.gov Hours_of_Service: 8:00am to 4:00pm M-F (EST) Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Access_Constraints: none Metadata_Use_Constraints: none Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile