Identification_Information: Citation: Citation_Information: Originator: Pennsylvania Natural Resources Conservation Service, State Office; Harrisburg, PA Publication_Date: 2008 Publication_Time: 2008 Title: pa_wbd_final_09032008 -- The 8, 10, and 12 hydrologic unit boundaries for Pennsylvania Edition: 1 Geospatial_Data_Presentation_Form: vector digital data, geodatabase Publication_Information: Publication_Place: Harrisburg, PA; Fort Worth, TX Publisher: U.S. Department of Agriculture, Natural Resources Conservaton Service Online_Linkage:http://www.pa.usda.nrcs.gov/WBD - Description: Abstract: This data set is a complete digital hydrologic unit boundary layer to the Subwatershed (12-digit) 6th level for the Commonwealth of Pennsylvania. This data set consists of geo-referenced digital data and associated attributes created in accordance with the "FGDC Proposal, Version 1.0 - Federal Standards For Delineation of Hydrologic Unit Boundaries 10/2004 "(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: 20080225 Currentness_Reference: Publication date of sources Status: Progress: Complete Maintenance_and_Update_Frequency: Unknown Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: 8 East_Bounding_Coordinate: 9 North_Bounding_Coordinate: 10 South_Bounding_Coordinate: 11 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: HUC Theme_Keyword: Hydrologic Units Theme_Keyword: Hydrologic Unit Code Theme_Keyword: Region 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 Theme_Keyword: PA-WBD Theme_Keyword: Pennsylvania Watershed Boundary Dataset Theme_Keyword: Pennsylvania WBD Place: Place_Keyword_Thesaurus: None Place_Keyword: Pennsylvania Place_Keyword: PA Place_Keyword: USA Place_Keyword: Chesapeake Bay Place_Keyword: Allegheny River Place_Keyword: Allegheny Basin Place_Keyword: Delaware River Place_Keyword: Delaware Basin Place_Keyword: Genesee River Place_Keyword: Genesee Basin Place_Keyword: Monongahela River Place_Keyword: Monongahela Basin Place_Keyword: Ohio River Place_Keyword: Ohio Basin Place_Keyword: Potomac River Place_Keyword: Potomac Basin Place_Keyword: Susquehanna River Place_Keyword: Susquehanna Basin 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_Person_Primary: Cheryl S. Johnson, GIS Coordinator Contact_Address: Address_Type: Address: One Credit Union PL – STE 340 City: Harrisburg State_or_Province: PA Postal_Code: 17110-2993 Contact_Voice_Telephone: 717-237-2237 Contact_Electronic_Mail_Address: cheryl.johnson@pa.usda.gov Contact_Organization_Secondary: Contact_Organization: USDA – Natural Resources Conservation Service Contact_Person_Secondary: Amanda N. Hasemeier, GIS Specialist Contact_Address: Address_Type: Address: One Credit Union PL – STE 340 City: Harrisburg State_or_Province: PA Postal_Code: 17110-2993 Contact_Voice_Telephone: 717-237-2236 Contact_Electronic_Mail_Address: amanda.hasemeier@pa.usda.gov Contact_Instructions: Please email questions and requests. Data_Set_Credit: Funding for the Pennsylvania Watershed Boundary Dataset (WBD) was provided by the United States Geologic Survey (Scott Hoffman), USDA-Natural Resources Conservation Service (Amanda Hasemeier). Representatives working on the WBD from NRCS in NJ, MD, WV, OH, NY, EPA Regions 3 and 5, and NY USGS have contributed in a combined effort with their time, salary, and expertise towards bringing the legacy dataset to meet the criteria outlined in the Federal Standards for Delineation of Hydrologic Unit Boundaries. Native_Data_Set_Environment: Microsoft Windows XP Professional Version 2002, Service Pack 2; ESRI ArcMap 9.2.1350 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: 100% of the attributes were visually verified using the 24K Digital Raster Graphics (DRG’s). The accuracy of this data is dependent on the level of detail of the source material and interpretation procedures for capturing that source. Logical_Consistency_Report: There are no unclosed polygons, intersections without nodes, or polygons without labels or with more than one label. ArcGIS ‘topology’ rules for polygons were used to identify and correct intersections without nodes, unclosed polygons and remove duplicate lines with the same beginning and ending nodes. All sliver polygons were removed either using eliminate, merge or manually in ArcMap. Completeness_Report: All fields for all polygons in the polygon feature dataset are attributed. Some polygons in the Ncontrb_a field might have a 0 value. Some polygons in the Hu_10_ds and Hu_12_ds may have a 0 value. All fields for the lines in the arcs feature dataset are attributed. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The Pennsylvania WBD was produced using Digital Raster Graphics as a source map. Data completeness for DRG files reflects content of the source graphic and may therefore be reflected in the completeness and accuracy of the WBD. The map was digitized from USGS 1:24,000-scale digital raster graphic base maps, with an inherited error of +/- 40 feet according to the USGS National Map Accuracy Standards. It is estimated that any errors detected were less than 10%. It should also be noted that while general rules of hydrology were used (i.e. natural water flow is downhill), the locations of boundaries is still somewhat subjective as the 1:24,000-scale DRG’s do not always provide enough information for identifying the location of the boundaries. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey (for Environmental Resources Research Institute, Pennsylvania Department of Environmental Protection) Publication_Date: 1997 Title: Small Watersheds Geospatial_Data_Presentation_Form: paper and digitized polygons Online_Linkage: http://www.pasda.psu.edu Source_Scale_Denominator: 24000 Type_of_Source_Media: USGS 7.5 minute Topographic sheets for the Commonwealth of Pennsylvania Source_Time_Period_of_Content: Time_Period_Information: Single_Dates/Times: Beginning_Date: Unknown Ending_Date: 1994 Source_Currentness_Reference: Map compilation and delineation; field verified. Source_Citation_Abbreviation: Source_Contribution: ERRI – Small Watersheds: Boundaries of 9,895 watersheds in Pennsylvania indicated in the Pennsylvania gazetteer of streams. These boundaries enclose catchment areas for named streams officially recognized by the Board on Geographic Names and other unofficially named streams that flow through named hollows. ERRI extracted, reprojected and edge-matched datasets for major watersheds produced by the Water Resources Division of the U.S. Geological Survey into this small watersheds coverage of the state of Pennsylvania. Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: Unknown Title: USGS 7.5 minute Topographic Quadrangle sheets for the Commonwealth of Pennsylvania Geospatial_Data_Presentation_Form: map Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Dates/Times: Calendar_date: unknown Source_Currentness_Reference: Map delineation Source_Citation_Abbreviation: TOPO24 Source_Contribution: hydrologic unit map delineation and digitized map Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: Unknown Title: Digital Raster Graphic Online_Linkage: http://datagateway.nrcs.usda.gov Source_Scale_Denominator: 24000 Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Dates/Times: Calendar_date: unknown Source_Currentness_Reference: Map delineation Source_Citation_Abbreviation: DRG24 Source_Contribution: hydrologic unit map delineation and digitized map Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: Unknown Title: 250K Hydrologic Unit Boundaries Geospatial_Data_Presentation_Form: map Source_Scale_Denominator: 250000 Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Dates/Times: Calendar_date: unknown Source_Currentness_Reference: Ground condition Source_Citation_Abbreviation: USGS1 Source_Contribution: Reference for 8-digit watershed delineation Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: Unknown Title: National Hydrography Dataset Online_Linkage: http://nhd.usgs.gov/data.html Source_Scale_Denominator: 24000 Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Dates/Times: Calendar_date: unknown Source_Currentness_Reference: Map delineation Source_Citation_Abbreviation: NHD Source_Contribution: GIS dataset used for reference in verifying watershed boundary delineation Process_Step: Process_Description: The Pennsylvania WBD began with an incomplete version of the Small Watershed digital file of Pennsylvania named-streams originated by USGS (Completed dataset described above). The Natural Resources Conservation Service GIS staff assisted with digitizing incomplete portions in the northeast area of PA. Final processing and edge-matching produced the complete version of the dataset. Digitizing was finished on Arc/Info workstation. Process involved using map delineation of named streams digital file digitized at 1:24,000 developed by USGS. Following guidelines of "National Instruction NO. 170-304" (early to mid-1990s), 14-digit designations were determined and county subwatersheds edited using the named-streams boundaries as a guideline. Changes and updates were recorded on 1:24,000 plots of original spatial data delineations; edited changes were made to complete the NRCS layer of 14-digit hydrologic unit areas for Pennsylvania with state boundaries, published in 2000. When the Federal Standards for Delineation of Hydrologic Unit Boundaries, Version 2.0 was released in October 2004, all delineations and coding in Pennsylvania were reviewed and updated to meet the 10 and 12-digit standards. Hydrologic Unit delineations are closed polygons that encompass all areas draining toward the lowest point (called outlet) in the polygon. Because of nominal sizes for the different hydrologic unit level: Watershed (40,00 to 250,000 acres) and Subwatershed (3,000 minimum, generally 10,000 to 40,000 acres), some polygons do not include all areas up to the drainage divide but all areas to one or more other upstream hydrologic units. Any hydrologic unit area smaller than 10,000 acres was selected for a special watershed study. A unique hydrologic unit code is used to identify each hydrologic unit. The Watershed (5th level) hydrologic unit codes start with the 8-digit Subbasin (Cataloging Unit) number that contains the Watershed. Likewise, the Subwatershed (6th level) hydrologic unit codes start with the 10-digit Watershed number that contains the Subwatershed. The order of precedence for establishing the pour point of a subwatershed is: (1) at the outlet of a lake or point; (2) at a confluence; (3) at some topographic feature, such as a natural gap in the topography; (4) at a dam; (5) at a stream gauging station. Cooperative efforts between NRCS, USGS, EPA and other staff have enhanced the data credibility across state boundaries to create seamless Subbasin boundaries. Further review and edits have been accomplished for verification of codes, watershed and subwatershed names with the completion of delineations in the surrounding states to create a national watershed dataset. Final digitizing efforts using ArcMap, referencing the Digital Raster Graphics, and using additional base layers such as the National Hydrography Dataset, DEMs, and recent orthophotography where available has been helpful in making the final dataset come within the National Standards for Spatial Data Accuracy (NSSDA) for 1:24,000 scale and bring historic data within the standard. Source_Used_Citation_Abbreviation: Coordinated effort between the United States Department of Agriculture-Natural Resources Conservation Service (USDA-NRCS), the United States Geological Survey (USGS), and the Environmental Protection Agency (EPA). The Watershed Boundary Dataset (WBD) was created from a variety of sources from each state and aggregated into a standard national layer for use in strategic planning and accountability. Watershed Boundary Dataset for Maryland Available URL: "http://datagateway.nrcs.usda.gov" [Accessed 07/01/2007]. Other Subbasin datasets shared with surrounding states as datasets were completed [Accessed through 2005, 2006, and 2007] Process_Date: 1992-2008 Process_Step: Process_Description: Metadata imported. Source_Used_Citation_Abbreviation: wbd_meta_tmplt_1.doc Process_Date: 20080303 Process_Step: Meta_ID: PA02 Process_Description: USGS, Water Science Center, Salt Lake City; Edits to Downstream coding. Source_Used_Citation_Abbreviation: Process_Date: 200908 Process_Step: Meta_ID: PA03 Process_Description: USGS, Water Science Center, Salt Lake City Name edits: Populate blank fields Correct spelling, ex. Srping to Spring, St. to Saint or visa versa depending on how GNIS has it, Cemetary to Cemetery Standardize use of “Frontal” Standardize use of “Headwaters, Outlet” Standardize use of “Upper, Middle, Lower” Cursory check that name is contained within the hydrologic unit Remove extraneous non-domain or non-GNIS names at, near, below, above, from, to, directional-northernmost, southern, easterly, etc. Incorrect spacings, ex. Oakcreek should be Oak Creek Line MODS: Assign a ‘SL’ for any arc that uses a shoreline/coastline as the boundary Assign a ‘PL’ for any arc that outlines a playa by using a contour or elevation HU_Level: Verify that the arc attributes for HU_Level are correct International boundaries need to be coded as ‘0’ Outer extent along open ocean coastals should be coded as ‘1’ Linesource: Anywhere that the NOAA 3-nautical mile outer extent is used should have a linesource of ‘NOAA3NM’ Source_Used_Citation_Abbreviation: Process_Date: 20100708 Process_Step: META_ID: PA04 Process_Description: Updates by USGS Water Science Center, Salt Lake City, Utah. Edits to any of the following: Line Mods, HU_Level, Linesource, DS codes and states. Source_Used_Citation_Abbreviation: Process_Date: 201010 Process_Step: META_ID: PA05 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: 201110 Process_Step: META_ID: PA06 Process_Description: Edits to linework by in-state steward. Source_Used_Citation_Abbreviation: Process_Date: 201112 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitute_Resolution: 0.000000 Longitude_Resolution: 0.000000 Geographic_Coordinate_System_Definition: 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 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: pa_wbd_final_09032008 Entity_Type_Definition: identifies 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: FNODE# Attribute_Definition: Internal node number for the beginning of an arc (from-node). Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Whole numbers that are automatically generated. Attribute: Attribute_Label: TNODE# Attribute_Definition: Internal node number for the end of an arc (to-node). Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Whole numbers that are automatically generated. Attribute: Attribute_Label: LPOLY# Attribute_Definition: Internal node number for the left polygon. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Whole numbers that are automatically generated. Attribute: Attribute_Label: RPOLY# Attribute_Definition: Internal node number for the right polygon. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Whole numbers that are automatically generated. Attribute: Attribute_Label: 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: pa_wbd_final_09032008 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: pa_wbd_final_09032008 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: HU_LEVEL Attribute_Definition: The highest hydrologic unit level (smallest number) for the line (arc) represented by the record 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: LINESOURCE Attribute_Definition: The base map source(s) used to delineate at 1:24,000 scale 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: META_ID Attribute_Definition: Metadata ID is a code that identifies which metadata file applies to the arc 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 Detailed_Description: Entity_Type: Entity_Type_Label: pa_wbd_final_09032008 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: pa_wbd_final_09032008 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: pa_wbd_final_09032008 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 Pennsylvania Natural Resources Conservation Service 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 - (REQUIRED) 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 - (REQUIRED) 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 - (REQUIRED) 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 - (REQUIRED) 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 - (REQUIRED) 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 - (FIELD REQUIRED, ATTRIBUTES OPTIONAL) 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 - (FIELD REQUIRED, ATTRIBUTES OPTIONAL) 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 - (FIELD REQUIRED, ATTRIBUTES OPTIONAL) 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 - (REQUIRED) 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 - (REQUIRED) 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, estuaries, 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 - (FIELD REQUIRED, ATTRIBUTES OPTIONAL) 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 - (FIELD REQUIRED, ATTRIBUTES OPTIONAL) 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 - (REQUIRED) 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 - (REQUIRED) 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, estuaries. 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 - (REQUIRED) 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 - (REQUIRED) 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 topographic 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 Dataset 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 - (REQUIRED) 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_Organization_Primary: Contact_Organization: U.S. Department of Agriculture – Natural Resources Conservation Service Contact_Person_Primary: Cheryl S. Johnson, GIS Coordinator Contact_Address: Address_Type: Address: One Credit Union PL – STE 340 City: Harrisburg State_or_Province: PA Postal_Code: 17110-2993 Contact_Voice_Telephone: 717-237-2237 Contact_Electronic_Mail_Address: cheryl.johnson@pa.usda.gov Contact_Organization_Secondary: Contact_Organization: USDA – Natural Resources Conservation Service Contact_Person_Secondary: Amanda N. Hasemeier, GIS Specialist Contact_Address: Address_Type: Address: One Credit Union PL – STE 340 City: Harrisburg State_or_Province: PA Postal_Code: 17110-2993 Contact_Voice_Telephone: 717-237-2236 Contact_Electronic_Mail_Address: amanda.hasemeier@pa.usda.gov Contact_Instructions: Please email questions and requests Resource_Descrition: 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 the Commonwealth of Pennsylvania. U. S. Department of Agriculture makes no claims for the data's suitability for other purposes. U. S. Department of Agriculture should be acknowledged as the data source in products derived from these data. The Pennsylvania 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 U. S. Department of Agriculture 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: ftp File_Decompression_Technique: Transfer_Size: Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://datagateway.nrcs.usda.gov Fees: none Metadata_Reference_Information: Metadata_Date: 20080903 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Amanda N. Hasemeier Contact_Organization: USDA – Natural Resources Conservation Service Contact_Address: Address_Type: mailing address Address: One Credit Union PL – STE 340 City: Harrisburg State_or_Province: PA Postal_Code: 17110-2993 Country: USA Contact_Voice_Telephone: 717-237-2236 Contact_Electronic_Mail_Address: amanda.hasemeier@pa.usda.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 PAmetadata.doc