Metadata:
  Identification_Information:
    Citation:
      Citation_Information:
        Originator: National Atlas of the United States
        Publication_Date: 200603
        Title: Major Dams of the United States
        Publication_Information:
          Publication_Place: Reston, VA
          Publisher: National Atlas of the United States
        Online_Linkage: <http://nationalatlas.gov/atlasftp.html?openChapters=chpwater#chpwater>

    Description:
      Abstract:
        This map layer portrays major dams of the United States, including Puerto
        Rico and the U.S. Virgin Islands.  The map layer was created by extracting
        dams 50 feet or more in height, or with a normal storage capacity of 5,000
        acre-feet or more, or with a maximum storage capacity of 25,000 acre-feet
        or more, from the 79,777 dams in the U.S. Army Corps of Engineers National
        Inventory of Dams.  This is a replacement for the April 1994 map layer.
      Purpose:
        These data are intended for geographic display and analysis at the
        national level, and for large regional areas.  The data should be
        displayed and analyzed at scales appropriate for 1:2,000,000-scale data.
        No responsibility is assumed by the National Atlas of the United States in
        the use of these data.
      Supplemental_Information:
        In the online National Atlas of the United States Map Maker, at scales
        smaller than 1:4,850,000 the data is thinned for display purposes.  For
        scales between 1: 4,850,000 and 1:22,000,000, dams are only shown if they
        have a height of 500 feet or more, or a normal storage capacity of 50,000
        acre-feet or more, or a maximum storage capacity of 250,000 acre-feet or
        more (1280 dams).  At scales smaller than 1:22,000,000, dams are only
        shown if they have a height of 5000 feet or more, or a normal storage
        capacity of 500,000 acre-feet or more, or a maximum storage capacity of
        2,500,000 acre-feet or more (290 dams).

    Time_Period_of_Content:
      Time_Period_Information:
        Range_of_Dates/Times:
          Beginning_Date: 200202
          Ending_Date: 200412
      Currentness_Reference: Dates of source material

    Status:
      Progress: Complete
      Maintenance_and_Update_Frequency: Irregular

    Spatial_Domain:
      Bounding_Coordinates:
        West_Bounding_Coordinate: -163
        East_Bounding_Coordinate: -66
        North_Bounding_Coordinate: 69
        South_Bounding_Coordinate: 18

    Keywords:
      Theme:
        Theme_Keyword_Thesaurus: ISO 19115 Topic Category
        Theme_Keyword: Inland Waters
      Theme:
        Theme_Keyword_Thesaurus: None
        Theme_Keyword: Hydrography
        Theme_Keyword: Dams
        Theme_Keyword: Dam safety
        Theme_Keyword: Reservoirs
        Theme_Keyword: Reservoir capacity
        Theme_Keyword: Reservoir storage
        Theme_Keyword: Surface water
      Theme:
        Theme_Keyword_Thesaurus: Tri-Service Spatial Data Standard
        Theme_Keyword: Improvement
      Place:
        Place_Keyword_Thesaurus: None
        Place_Keyword: USA
        Place_Keyword: Alaska
        Place_Keyword: Alabama
        Place_Keyword: Arkansas
        Place_Keyword: Arizona
        Place_Keyword: California
        Place_Keyword: Colorado
        Place_Keyword: Connecticut
        Place_Keyword: Delaware
        Place_Keyword: Florida
        Place_Keyword: Georgia
        Place_Keyword: Hawaii
        Place_Keyword: Idaho
        Place_Keyword: Iowa
        Place_Keyword: Illinois
        Place_Keyword: Indiana
        Place_Keyword: Kansas
        Place_Keyword: Kentucky
        Place_Keyword: Louisiana
        Place_Keyword: Maine
        Place_Keyword: Massachusetts
        Place_Keyword: Maryland
        Place_Keyword: Michigan
        Place_Keyword: Minnesota
        Place_Keyword: Missouri
        Place_Keyword: Mississippi
        Place_Keyword: Montana
        Place_Keyword: North Carolina
        Place_Keyword: North Dakota
        Place_Keyword: Nebraska
        Place_Keyword: New Hampshire
        Place_Keyword: New Jersey
        Place_Keyword: New Mexico
        Place_Keyword: Nevada
        Place_Keyword: New York
        Place_Keyword: Ohio
        Place_Keyword: Oklahoma
        Place_Keyword: Oregon
        Place_Keyword: Pennsylvania
        Place_Keyword: Rhode Island
        Place_Keyword: South Carolina
        Place_Keyword: South Dakota
        Place_Keyword: Tennessee
        Place_Keyword: Texas
        Place_Keyword: United States
        Place_Keyword: Utah
        Place_Keyword: Vermont
        Place_Keyword: Virginia
        Place_Keyword: Wisconsin
        Place_Keyword: Washington
        Place_Keyword: West Virginia
        Place_Keyword: Wyoming
        Place_Keyword: Puerto Rico
        Place_Keyword: Virgin Islands
        Place_Keyword: U.S. Virgin Islands

    Access_Constraints: None
    Use_Constraints:
      None.  Acknowledgment of the National Atlas of the United States of America
      would be appreciated in products derived from these data.

    Point_of_Contact:
      Contact_Information:
        Contact_Person_Primary:
          Contact_Person: Peg Rawson
          Contact_Organization: National Atlas of the United States
        Contact_Address:
          Address_Type: Mailing address
          Address: 12201 Sunrise Valley Drive
          Address: MS-561
          City: Reston
          State_or_Province: VA
          Postal_Code: 20192
        Contact_Voice_Telephone: 703-648-4183
        Contact_Electronic_Mail_Address: atlasmail@usgs.gov

    Native_Data_Set_Environment: ESRI shapefile format

  Data_Quality_Information:
    Logical_Consistency_Report: None
    Completeness_Report:
      This file contains those dams from the National Inventory of Dams with a
      height of 50 feet or more, or with a normal storage capacity of 5000 acre-
      feet or more, or with a maximum storage capacity of 25,000 acre-feet or
      more.  Dams outside of the 50 States, Puerto Rico, and the U.S. Virgin
      Islands are not included, nor are dams for which there is no positional
      information in the National Inventory of Dams.
    Lineage:
      Source_Information:
        Source_Citation:
          Citation_Information:
            Originator:
              U.S. Army Corps of Engineers in cooperation with FEMA's National Dam
              Safety Program
            Publication_Date: 20050209
            Title: National Inventory of Dams, Water Control Infrastructure
            Publication_Information:
              Publication_Place: Alexandria, VA
              Publisher: U.S. Army Corps of Engineers
            Online_Linkage: <http://crunch.tec.army.mil/nid/webpages/nid.cfm>
        Type_of_Source_Media: Online
        Source_Time_Period_of_Content:
          Time_Period_Information:
            Range_of_Dates/Times:
              Beginning_Date: 200202
              Ending_Date: 200412
          Source_Currentness_Reference: Publication date
        Source_Citation_Abbreviation: NID
        Source_Contribution: Spatial and attribute information
      Source_Information:
        Source_Citation:
          Citation_Information:
            Originator: National Atlas of the United States
            Publication_Date: 200506
            Title: County Boundaries of the United States, 2001
            Publication_Information:
              Publication_Place: Reston, VA
              Publisher: National Atlas of the United States
            Online_Linkage: <http://nationalatlas.gov/atlasftp.html?openChapters=chpbound#chpbound>
        Type_of_Source_Media: Online
        Source_Time_Period_of_Content:
          Time_Period_Information:
            Range_of_Dates/Times:
              Beginning_Date: 1972
              Ending_Date: 2001
          Source_Currentness_Reference: Ground condition
        Source_Citation_Abbreviation: Atlas-Cnty
        Source_Contribution: Attribute information

      Process_Step:
        Process_Description:
          The full National Inventory of Dams (NID) was downloaded from the NID
          web site in shapefile format and loaded into ArcView.  Using an
          ArcView query, major dams were selected and placed in a new shapefile.
          Major dams were defined as dams with a height of 50 feet or more, or
          with a normal storage capacity of 5,000 acre-feet or more, or with a
          maximum storage capacity of 25,000 acre-feet or more.  (The
          International Committee on Large Dams considers dams over 50 feet to be
          large dams.  The USGS Water Resources Division considers large
          reservoirs to be those with a normal storage capacity of 5,000 acre-feet
          or more, or with a maximum storage capacity of 25,000 acre-feet or
          more.)

          One dam in Guam and one dam in the Trust Territories were deleted.
          Eighty-nine dams without valid latitude/longitude coordinates were also
          deleted.

          Because the text fields contained entries in a mix of formats, some in
          all capitals and some in capitals and lower-case, all text entries were
          changed to all capitals.

          Some dams were missing county attribute values.  The appropriate values
          were determined by comparing the dam locations to the Atlas-Cnty file.
          One dam was deleted because it was described as being in Maryland but
          had coordinates that placed it in Virginia.

          Invalid values for owner type (197 records), dam type (10 records), and
          year completed (3 records) were changed to blanks to indicate that the
          values are unknown.  The attribute Purposes contained some invalid
          codes; these were removed but valid codes and duplicate codes were
          retained.  Thirty-nine records contained a value of -9.9 for Nid_height.
          The appropriate value for each record was determined by looking at the
          dam height, structural height, and hydraulic height values in the source
          data.  One invalid value for hazard was changed to U to indicate that
          the hazard potential is unknown.

          The shape file was converted to an ArcInfo coverage and then converted
          to NAD 83 for display purposes.  The result was then converted back to
          shapefile format.
        Source_Used_Citation_Abbreviation: NID05
        Source_Used_Citation_Abbreviation: Atlas-Cnty
        Process_Date: 200512
      Process_Step:
        Process_Description:
          An attribute was added to the shapefile to allow for symbolization in the
          National Atlas Map Maker.
        Process_Date: 20060320

  Spatial_Data_Organization_Information:
    Indirect_Spatial_Reference:
      U.S. Department of Commerce, 1987, Codes for the Identification of the
      States, the District of Columbia and the Outlying Areas of the United
      States, and Associated Areas (FIPS 5-2): Washington, DC, National Institute
      of Standards and Technology.

      U.S. Department of Commerce, 1990, Counties and Equivalent Entities of the
      United States, Its Possessions, and Associated Areas (FIPS 6-4): Washington,
      DC, National Institute of Standards and Technology.

    Direct_Spatial_Reference_Method: Point
    Point_and_Vector_Object_Information:
      SDTS_Terms_Description:
        SDTS_Point_and_Vector_Object_Type: Point
        Point_and_Vector_Object_Count: 8121

  Spatial_Reference_Information:
    Horizontal_Coordinate_System_Definition:
      Geographic:
        Latitude_Resolution: 0.000278
        Longitude_Resolution: 0.000278
        Geographic_Coordinate_Units: Decimal degrees
      Geodetic_Model:
        Horizontal_Datum_Name: North American Datum of 1983
        Ellipsoid_Name: GRS1980
        Semi-major_Axis: 6378137
        Denominator_of_Flattening_Ratio: 298.257222

  Entity_and_Attribute_Information:
    Detailed_Description:
      Entity_Type:
        Entity_Type_Label: Dam
        Entity_Type_Definition:
          Any artificial barrier, including appurtenant works, which impounds or
          diverts water, and which (1) is twenty-five feet or more in height from
          the natural bed of the stream or watercourse measured at the downstream
          toe of the barrier, or from the lowest elevation of the outside limit of
          the barrier, if it is not across a stream channel or watercourse, to the
          maximum water storage elevation or (2) has an impounding capacity at
          maximum water storage elevation of fifty acre-feet or more.  This Act
          does not apply to any such barrier which is not in excess of six feet in
          height, regardless of storage capacity or which has a storage capacity
          at maximum water storage elevation not in excess of fifteen acre-feet,
          regardless of height, unless such barrier, due to its location or other
          physical characteristic, is likely to pose a significant threat to human
          life or property in the event of its failure.
        Entity_Type_Definition_Source:
          Dam Safety Act of 1972 (P.L. 92-367) and Dam Safety Act of 1986 (P.L.
          99-662)
      Attribute:
        Attribute_Label: Shape
        Attribute_Definition: The representation of the entity in the data.
        Attribute_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Point
            Enumerated_Domain_Value_Definition: 0-dimensional element
            Enumerated_Domain_Value_Definition_Source: ESRI GIS software
      Attribute:
        Attribute_Label: Dams00x020
        Attribute_Definition: Internal feature number.
        Attribute_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 1
            Range_Domain_Maximum: 8121
      Attribute:
        Attribute_Label: Dam_name
        Attribute_Definition:
          The official name of the dam.  For dams that do not have an official
          name, the popular name is used.
        Attribute_Definition_Source: U.S. Army Corps of Engineers
        Attribute_Domain_Values:
          Unrepresentable_Domain:
            There is no predefined set of valid dam names.  The attribute contains
            the official name of the dam, or the popular name if there is no
            official name.
          Enumerated_Domain:
            Enumerated_Domain_Value: <blank>
            Enumerated_Domain_Value_Definition:
              The name of the dam is not provided in the National Inventory of
              Dams.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
      Attribute:
        Attribute_Label: Other_name
        Attribute_Definition:
          The reservoir name or names in common use other than the official name
          of the dam.  Names are separated with semicolons.
        Attribute_Definition_Source: U.S. Army Corps of Engineers
        Attribute_Domain_Values:
          Unrepresentable_Domain: There is no predefined set of reservoir or common use names.
          Enumerated_Domain:
            Enumerated_Domain_Value: <blank>
            Enumerated_Domain_Value_Definition:
              There are no other names for the dam, or the other names are
              unknown.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
      Attribute:
        Attribute_Label: Nidid
        Attribute_Definition:
          The official National Inventory of Dams identification number for the
          dam, known formerly as the National Id.  The first two characters of the
          identity are the State two letter abbreviation, based on the location of
          the dam.  The last five characters of the identity are a unique number
          (AB#####).
        Attribute_Definition_Source: U.S. Army Corps of Engineers
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: AK00001
            Range_Domain_Maximum: WY83004
      Attribute:
        Attribute_Label: Longitude
        Attribute_Definition: Dam longitude as a single value, in decimal degrees.
        Attribute_Definition_Source: U.S. Army Corps of Engineers
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: -162.87781
            Range_Domain_Maximum: -66.015000
      Attribute:
        Attribute_Label: Latitude
        Attribute_Definition: Dam latitude as a single value, in decimal degrees.
        Attribute_Definition_Source: U.S. Army Corps of Engineers
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 18.017300
            Range_Domain_Maximum: 68.069400
      Attribute:
        Attribute_Label: County
        Attribute_Definition:
          The name of the county in which the dam is located.  If the dam falls in
          more than one county, the names may be separated by a slash, a comma, or
          a semicolon.
        Attribute_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: <blank>
            Enumerated_Domain_Value_Definition:
              The name of the county is not provided in the National Inventory of
              Dams.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
          Codeset_Domain:
            Codeset_Name:
              Counties and Equivalent Areas of the United States, Its Possessions,
              and Associated Areas, FIPS PUB 6-4.
            Codeset_Source: U.S. Department of Commerce
      Attribute:
        Attribute_Label: River
        Attribute_Definition:
          The official name of the river or stream on which the dam is built.  If
          the stream is unnamed, it is identified as a tributary ("TR") to a named
          river.  If the dam is located offstream, the name of the river or stream
          is entered plus "-OS" or "OFFSTREAM".
        Attribute_Definition_Source: U.S. Army Corps of Engineers
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: <blank>
            Enumerated_Domain_Value_Definition:
              The name of the river is not provided in the National Inventory of
              Dams.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
          Unrepresentable_Domain: There is no predefined set of valid river or stream names.
      Attribute:
        Attribute_Label: City
        Attribute_Definition:
          The name of the nearest city, town, or village that is most likely to be
          affected by floods resulting from the failure of the dam.
        Attribute_Definition_Source: U.S. Army Corps of Engineers
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: <blank>
            Enumerated_Domain_Value_Definition:
              The name of the city is not provided in the National Inventory of
              Dams.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
          Unrepresentable_Domain: There is no predefined set of valid city names.
      Attribute:
        Attribute_Label: Own_name
        Attribute_Definition: The name of the owner of the dam.
        Attribute_Definition_Source: U.S. Army Corps of Engineers
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: <blank>
            Enumerated_Domain_Value_Definition:
              The name of the owner is not provided in the National Inventory of
              Dams.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
          Unrepresentable_Domain: There is no predefined set of valid owner names.
      Attribute:
        Attribute_Label: Own_type
        Attribute_Definition: A term indicating owner type.
        Attribute_Definition_Source: U.S. Army Corps of Engineers
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: <blank>
            Enumerated_Domain_Value_Definition: The owner type is unknown.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
          Enumerated_Domain:
            Enumerated_Domain_Value: F
            Enumerated_Domain_Value_Definition: The dam is owned by a Federal agency.
            Enumerated_Domain_Value_Definition_Source: U.S. Army Corps of Engineers
          Enumerated_Domain:
            Enumerated_Domain_Value: L
            Enumerated_Domain_Value_Definition:
              The dam is owned by a County, City, Regional, or other similar local
              government or government agency.
            Enumerated_Domain_Value_Definition_Source: U.S. Army Corps of Engineers
          Enumerated_Domain:
            Enumerated_Domain_Value: P
            Enumerated_Domain_Value_Definition:
              The dam is owned by an individual or individuals, or by a private
              company.
            Enumerated_Domain_Value_Definition_Source: U.S. Army Corps of Engineers
          Enumerated_Domain:
            Enumerated_Domain_Value: S
            Enumerated_Domain_Value_Definition: The dam is owned by a State or by a State agency.
            Enumerated_Domain_Value_Definition_Source: U.S. Army Corps of Engineers
          Enumerated_Domain:
            Enumerated_Domain_Value: U
            Enumerated_Domain_Value_Definition: The dam is owned by a public utility.
            Enumerated_Domain_Value_Definition_Source: U.S. Army Corps of Engineers
      Attribute:
        Attribute_Label: Dam_type
        Attribute_Definition:
          A code or codes indicating the dam type, in order of importance.  Codes
          are concatenated if the dam is a combination of several types.  For
          example, CNCB would indicate a concrete buttress type dam.
        Attribute_Definition_Source: U.S. Army Corps of Engineers
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: <blank>
            Enumerated_Domain_Value_Definition: The dam type is unknown.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
          Enumerated_Domain:
            Enumerated_Domain_Value: CB
            Enumerated_Domain_Value_Definition: Buttress
            Enumerated_Domain_Value_Definition_Source: U.S. Army Corps of Engineers
          Enumerated_Domain:
            Enumerated_Domain_Value: CN
            Enumerated_Domain_Value_Definition: Concrete
            Enumerated_Domain_Value_Definition_Source: U.S. Army Corps of Engineers
          Enumerated_Domain:
            Enumerated_Domain_Value: ER
            Enumerated_Domain_Value_Definition: Rockfill
            Enumerated_Domain_Value_Definition_Source: U.S. Army Corps of Engineers
          Enumerated_Domain:
            Enumerated_Domain_Value: MS
            Enumerated_Domain_Value_Definition: Masonry
            Enumerated_Domain_Value_Definition_Source: U.S. Army Corps of Engineers
          Enumerated_Domain:
            Enumerated_Domain_Value: MV (or MultiArch)
            Enumerated_Domain_Value_Definition: Multi-arch
            Enumerated_Domain_Value_Definition_Source: U.S. Army Corps of Engineers
          Enumerated_Domain:
            Enumerated_Domain_Value: OT
            Enumerated_Domain_Value_Definition: Other
            Enumerated_Domain_Value_Definition_Source: U.S. Army Corps of Engineers
          Enumerated_Domain:
            Enumerated_Domain_Value: PG
            Enumerated_Domain_Value_Definition: Gravity
            Enumerated_Domain_Value_Definition_Source: U.S. Army Corps of Engineers
          Enumerated_Domain:
            Enumerated_Domain_Value: RE
            Enumerated_Domain_Value_Definition: Earth
            Enumerated_Domain_Value_Definition_Source: U.S. Army Corps of Engineers
          Enumerated_Domain:
            Enumerated_Domain_Value: ST
            Enumerated_Domain_Value_Definition: Stone
            Enumerated_Domain_Value_Definition_Source: U.S. Army Corps of Engineers
          Enumerated_Domain:
            Enumerated_Domain_Value: TC
            Enumerated_Domain_Value_Definition: Timber crib
            Enumerated_Domain_Value_Definition_Source: U.S. Army Corps of Engineers
          Enumerated_Domain:
            Enumerated_Domain_Value: VA
            Enumerated_Domain_Value_Definition: Arch
            Enumerated_Domain_Value_Definition_Source: U.S. Army Corps of Engineers
      Attribute:
        Attribute_Label: Purposes
        Attribute_Definition:
          A code or codes indicating the purposes for which reservoir is used, in
          order of importance.  The codes are concatenated if the dam has multiple
          purposes.  For example, SCR would indicate the primary purposes of Water
          Supply and Flood Control and Storm Water Management, followed by
          Recreation.  The data may contain words or abbreviations that were used
          instead of the appropriate codes; these have been retained.
        Attribute_Definition_Source: U.S. Army Corps of Engineers
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: <blank>
            Enumerated_Domain_Value_Definition:
              The purpose of the dam is not provided in the National Inventory of
              Dams.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
          Enumerated_Domain:
            Enumerated_Domain_Value: C
            Enumerated_Domain_Value_Definition: Flood control and storm water management
            Enumerated_Domain_Value_Definition_Source: U.S. Army Corps of Engineers
          Enumerated_Domain:
            Enumerated_Domain_Value: D
            Enumerated_Domain_Value_Definition: Debris control
            Enumerated_Domain_Value_Definition_Source: U.S. Army Corps of Engineers
          Enumerated_Domain:
            Enumerated_Domain_Value: F
            Enumerated_Domain_Value_Definition: Fish and wildlife pond
            Enumerated_Domain_Value_Definition_Source: U.S. Army Corps of Engineers
          Enumerated_Domain:
            Enumerated_Domain_Value: H
            Enumerated_Domain_Value_Definition: Hydroelectric
            Enumerated_Domain_Value_Definition_Source: U.S. Army Corps of Engineers
          Enumerated_Domain:
            Enumerated_Domain_Value: I
            Enumerated_Domain_Value_Definition: Irrigation
            Enumerated_Domain_Value_Definition_Source: U.S. Army Corps of Engineers
          Enumerated_Domain:
            Enumerated_Domain_Value: N
            Enumerated_Domain_Value_Definition: Navigation
            Enumerated_Domain_Value_Definition_Source: U.S. Army Corps of Engineers
          Enumerated_Domain:
            Enumerated_Domain_Value: O
            Enumerated_Domain_Value_Definition: Other
            Enumerated_Domain_Value_Definition_Source: U.S. Army Corps of Engineers
          Enumerated_Domain:
            Enumerated_Domain_Value: P
            Enumerated_Domain_Value_Definition: Fire protection, stock, or small farm pond
            Enumerated_Domain_Value_Definition_Source: U.S. Army Corps of Engineers
          Enumerated_Domain:
            Enumerated_Domain_Value: R
            Enumerated_Domain_Value_Definition: Recreation
            Enumerated_Domain_Value_Definition_Source: U.S. Army Corps of Engineers
          Enumerated_Domain:
            Enumerated_Domain_Value: S
            Enumerated_Domain_Value_Definition: Water supply
            Enumerated_Domain_Value_Definition_Source: U.S. Army Corps of Engineers
          Enumerated_Domain:
            Enumerated_Domain_Value: T
            Enumerated_Domain_Value_Definition: Tailings
            Enumerated_Domain_Value_Definition_Source: U.S. Army Corps of Engineers
      Attribute:
        Attribute_Label: Yr_compl
        Attribute_Definition:
          The year when the main dam structure was completed.  A value of 0
          indicates that the year is unknown.
        Attribute_Definition_Source: U.S. Army Corps of Engineers
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 1800
            Range_Domain_Maximum: 2003
      Attribute:
        Attribute_Label: Nid_height
        Attribute_Definition:
          The maximum of either the dam height (the vertical distance between the
          lowest point on the crest of the dam and the lowest point in the
          original streambed), the hydraulic height (the vertical distance between
          the maximum designed water level and the lowest point in the original
          streambed), or the structural height (the vertical distance between the
          lowest point of the excavated foundation and the top of the dam) of the
          dam.  The height is given in feet, to the nearest foot.
        Attribute_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 0.00000000000
            Enumerated_Domain_Value_Definition: The height is unknown.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
          Range_Domain:
            Range_Domain_Minimum: 3.000000000000
            Range_Domain_Maximum: 770.00000000000
      Attribute:
        Attribute_Label: Max_stor
        Attribute_Definition:
          The maximum storage in acre-feet.  Maximum storage is the total storage
          space in a reservoir below the maximum attainable water surface
          elevation, including any surcharge storage.
        Attribute_Definition_Source: U.S. Army Corps of Engineers
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 0.00000000000
            Enumerated_Domain_Value_Definition: The maximum storage is unknown.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
          Range_Domain:
            Range_Domain_Minimum: 1.00000000000
            Range_Domain_Maximum: 9700000000.00000000
      Attribute:
        Attribute_Label: Normal_sto
        Attribute_Definition:
          The normal storage in acre-feet.  Normal storage is the total storage
          space in a reservoir below the normal retention level, including dead
          and inactive storage and excluding any flood control surcharge storage.
          A value of 0 may indicate that the normal storage is unknown or may
          indicate that the dam is normally dry.
        Attribute_Definition_Source: U.S. Army Corps of Engineers
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 0.00000000000
            Range_Domain_Maximum: 9700000000.00000000
      Attribute:
        Attribute_Label: Surf_area
        Attribute_Definition:
          The surface area, in acres, of the impoundment at its normal retention
          level.
        Attribute_Definition_Source: U.S. Army Corps of Engineers
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 0.00000000000
            Enumerated_Domain_Value_Definition: The surface area is unknown.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
          Range_Domain:
            Range_Domain_Minimum: 0.01000000000
            Range_Domain_Maximum: 20358400.0000000000
      Attribute:
        Attribute_Label: Drain_area
        Attribute_Definition:
          The drainage area of the dam in square miles.  It is defined as the area
          that drains to a particular point (in this case, the dam) on a river or
          stream.
        Attribute_Definition_Source: U.S. Army Corps of Engineers
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 0.00000000000
            Enumerated_Domain_Value_Definition: The drainage area is unknown.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
          Range_Domain:
            Range_Domain_Minimum: 0.00156250000
            Range_Domain_Maximum: 1250000.00000000000
      Attribute:
        Attribute_Label: Hazard
        Attribute_Definition:
          A term indicating the potential hazard to the downstream area resulting
          from failure or mis-operation of the dam or facilities.
        Attribute_Definition_Source: U.S. Army Corps of Engineers
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: L
            Enumerated_Domain_Value_Definition:
              The potential hazard is low.  A dam where failure or misoperation
              results in no probable loss of human life and low economic and/or
              environmental loss.  Losses are principally limited to the owner's
              property.
            Enumerated_Domain_Value_Definition_Source: U.S. Army Corps of Engineers
          Enumerated_Domain:
            Enumerated_Domain_Value: S
            Enumerated_Domain_Value_Definition:
              The potential hazard is significant.  A dam where failure or
              misoperation results in no probable loss of human life but can cause
              economic loss, environmental damage, disruption of lifeline
              facilities, or impact other concerns.  These dams are often located
              in predominantly rural or agricultural areas but could be located in
              areas with population and significant infrastructure.
            Enumerated_Domain_Value_Definition_Source: U.S. Army Corps of Engineers
          Enumerated_Domain:
            Enumerated_Domain_Value: H
            Enumerated_Domain_Value_Definition:
              The potential hazard is high.  A dam where failure or misoperation
              will probably cause loss of human life.
            Enumerated_Domain_Value_Definition_Source: U.S. Army Corps of Engineers
          Enumerated_Domain:
            Enumerated_Domain_Value: U
            Enumerated_Domain_Value_Definition: The potential hazard is unknown.
            Enumerated_Domain_Value_Definition_Source: U.S. Army Corps of Engineers
      Attribute:
        Attribute_Label: State
        Attribute_Definition: The two letter abbreviation for the State in which the dam is located.
        Attribute_Definition_Source: U.S. Army Corps of Engineers
        Attribute_Domain_Values:
          Codeset_Domain:
            Codeset_Name:
              Codes for the Identification of the States, the District of Columbia
              and the Outlying Areas of the United States, and Associated Areas,
              FIPS PUB 5-2.
            Codeset_Source: U.S. Department of Commerce
      Attribute:
        Attribute_Label: Symbol
        Attribute_Definition:
          A code indicating how the dam is symbolized in the National Atlas Map Maker.
          The symbol is determined from the primary Purpose code given for the dam,
          which is the first or only code listed under the attribute Purpose.  Where
          the Purpose attribute contains a word or abbreviation instead of the
          appropriate code, the first letter of the Purpose value was still used to
          determine the symbol code.  In these cases the symbol may not accurately
          represent the true primary purpose of the dam.
        Attribute_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: <blank>
            Enumerated_Domain_Value_Definition: The dam has an unknown purpose.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
          Enumerated_Domain:
            Enumerated_Domain_Value: C
            Enumerated_Domain_Value_Definition: The dam is for flood control and storm water management.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
          Enumerated_Domain:
            Enumerated_Domain_Value: D
            Enumerated_Domain_Value_Definition: The dam is for debris control.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
          Enumerated_Domain:
            Enumerated_Domain_Value: F
            Enumerated_Domain_Value_Definition: The dam contains a fish and wildlife pond.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
          Enumerated_Domain:
            Enumerated_Domain_Value: H
            Enumerated_Domain_Value_Definition: The dam is for hydroelectric power.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
          Enumerated_Domain:
            Enumerated_Domain_Value: I
            Enumerated_Domain_Value_Definition: The reservoir contained by the dam is for irrigation.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
          Enumerated_Domain:
            Enumerated_Domain_Value: N
            Enumerated_Domain_Value_Definition: The dam is for navigation.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
          Enumerated_Domain:
            Enumerated_Domain_Value: O
            Enumerated_Domain_Value_Definition:
              The dam or reservoir contained by the dam has a primary purpose other
              than flood control and storm water management; debris control; fish and
              wildlife pond; hydroelectric; irrigation; navigation; fire protection,
              stock, or small farm pond; recreation; water supply; or tailings
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
          Enumerated_Domain:
            Enumerated_Domain_Value: P
            Enumerated_Domain_Value_Definition: The dam contains a fire protection, stock, or small farm pond
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
          Enumerated_Domain:
            Enumerated_Domain_Value: R
            Enumerated_Domain_Value_Definition: The reservoir contained by the dam is for recreation.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
          Enumerated_Domain:
            Enumerated_Domain_Value: S
            Enumerated_Domain_Value_Definition: The reservoir contained by the dam is for water supply.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
          Enumerated_Domain:
            Enumerated_Domain_Value: T
            Enumerated_Domain_Value_Definition: The dam contains a tailings pond.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States

  Distribution_Information:
    Distributor:
      Contact_Information:
        Contact_Organization_Primary:
          Contact_Organization: Earth Science Information Center, U.S. Geological Survey
        Contact_Address:
          Address_Type: Mailing address
          Address: 507 National Center
          City: Reston
          State_or_Province: VA
          Postal_Code: 20192
        Contact_Voice_Telephone: 1-888-ASK-USGS (1-888-275-8747)
        Contact_Voice_Telephone: 703-648-5920
        Contact_Instructions:
          In addition to the address above there are other ESIC offices throughout
          the country.  A full list of these offices is at
          <http://ask.usgs.gov/esic_index.html>.
    Distribution_Liability:
      Although these data have been processed successfully on a computer system at
      the U.S. Geological Survey, no warranty expressed or implied is made by the
      U.S. Geological Survey regarding the utility of the data on any other
      system, nor shall the act of distribution constitute any such warranty.  No
      responsibility is assumed by the U.S. Geological Survey in the use of these
      data.

    Standard_Order_Process:
      Digital_Form:
        Digital_Transfer_Information:
          Format_Name: ESRI Shapefile
        Digital_Transfer_Option:
          Online_Option:
            Computer_Contact_Information:
              Network_Address:
                Network_Resource_Name: <http://nationalatlas.gov/atlasftp.html?openChapters=chpwater#chpwater>
      Digital_Form:
        Digital_Transfer_Information:
          Format_Name: SDTS
        Digital_Transfer_Option:
          Online_Option:
            Computer_Contact_Information:
              Network_Address:
                Network_Resource_Name: <http://nationalatlas.gov/atlasftp.html?openChapters=chpwater#chpwater>
      Fees: There is no charge for the map layer.

  Metadata_Reference_Information:
    Metadata_Date: 20060321
    Metadata_Contact:
      Contact_Information:
        Contact_Person_Primary:
          Contact_Person: Peg Rawson
          Contact_Organization: National Atlas of the United States
        Contact_Address:
          Address_Type: Mailing address
          Address: 12201 Sunrise Valley Drive
          Address: MS-561
          City: Reston
          State_or_Province: VA
          Postal_Code: 20192
        Contact_Voice_Telephone: 703-648-4183
        Contact_Electronic_Mail_Address: atlasmail@usgs.gov
    Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
    Metadata_Standard_Version: FGDC-STD-001-1998
    Metadata_Security_Information:
      Metadata_Security_Classification_System: None
      Metadata_Security_Classification: Unclassified
      Metadata_Security_Handling_Description: None