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U.S. Dams Shapefile Metadata

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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

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About Quality, Accuracy and Suitability

This data may come from a variety of U.S. government and self-reporting private sources. While we try to assure the accuracy of this material, we cannot promise that it is absolutely accurate. We do promise that using the map layer will be fun, entertaining or educational. Beyond this, we make no guarantee as to its suitability for any purpose. We assume no liability or responsibility for errors or inaccuracies. Please understand that you use these map layers at your own risk.

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