This dataset is provided as part of the USGS National Hydrology Dataset and depicts the point locations for major dams in all fifty states and Puerto Rico. The dams locations in this dataset were pulled from the United States Army Corps or Engineers National Inventory of Dams (NID) database. Dams that are included in the NID must meet one of the following criteria: 1) High hazard classification - loss of one human life is likely if the dam fails, 2) Significant hazard classification - possible loss of human life and likely significant property or environmental destruction, 3) Equal or exceed 25 feet in height and exceed 15 acre-feet in storage, 4) Equal or exceed 50 acre-feet storage and exceed 6 feet in height. This dataset was retrieved from the USGS National Hydrology Dataset (NHD) website here: ftp://nhdftp.usgs.gov/DataSets/National/
Purpose
This datasets is made available to interested persons through the University of Arizona's instance of Open Geoportal. It has been provided to assist educators, students, researchers, and policy makers in mapping and/or analysis applications.
Bounding Box
West
-159.758016
East
-66.01522
North
65.597292
South
18.019612
ISO Topic Category
farming
environment
structure
utilitiesCommunication
location
Theme Keyword
Theme Keyword Thesaurus
Theme Keyword
location
inlandWater
structure
environment
utilitiesCommunication
farming
Theme Keyword Thesaurus
ISO 19115 Topic Category
Place Keyword
Place Keyword Thesaurus
Place Keyword
State of Kentucky
State of Pennsylvania
State of South Carolina
State of South Dakota
State of Delaware
State of North Dakota
State of Hawaii
State of Missouri
State of North Carolina
State of Wyoming
State of Tennessee
State of Michigan
State of Ohio
State of Mississippi
State of Virgina
State of Vermont
State of Florida
State of New York
State of Iowa
State of Nebraska
State of Alaska
State of Massachusetts
State of Idaho
State of Kansas
State of Nevada
State of California
State of Texas
State of Alabama
State of Maryland
State of West Virginia
State of New Hampshire
State of Oklahoma
State of Montana
State of Minnesota
State of Maine
State of Arkansas
State of Wisconsin
State of Rhode Island
State of Colorado
State of Oregon
State of Indiana
State of New Jersey
State of Louisiana
State of Georgia
State of Illinois
State of Utah
State of Washington
State of Connecticut
State of Puerto Rico
State of Arizona
State of New Mexico
Place Keyword Thesaurus
GNIS
Language
eng
Spatial Reference Information
Reference System Identifier
Code
NAD83 (EPSG:4269)
Code Space
EPSG
Version
7.9
Data Quality Information
Lineage
Process Step
Description
Dataset renamed from NHDPointEventFC_Dams.shp to USA_MajorDams_2013.shp by Ben Hickson with the University of Arizona Library. Metadata fields corresponding the Open Geoportal Working Group Best Practices Guide (http://opengeoportal.org/working-groups/metadata/) were also updated.
