Shapefile for the shoreline of Lake Mead

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: David C. Twichell
Originator: VeeAnn A. Cross
Publication_Date: 2003
Title: Shapefile for the shoreline of Lake Mead
Geospatial_Data_Presentation_Form: vector digital data
Other_Citation_Details:
This shapefile was modified from a shoreline acquired from the Bureau of Reclamation in Boulder City, NV.
Online_Linkage: <https://pubs.usgs.gov/of/2003/of03-320/htmldocs/datacatalog.htm>
Online_Linkage: <https://pubs.usgs.gov/of/2003/of03-320/data/bounds/lakebnds.zip>
Online_Linkage: <https://pubs.usgs.gov/of/2009/1150/gis/basemap/lakebnds.zip>
Larger_Work_Citation:
Citation_Information:
Originator: David C. Twichell
Originator: VeeAnn A. Cross
Originator: Stephen D. Belew
Publication_Date: 2003
Title:
Mapping the floor of Lake Mead (Nevada and Arizona): Preliminary discussion and GIS data release
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 03-320
Publication_Information:
Publication_Place: Woods Hole Field Center, Woods Hole, MA
Publisher: U.S. Geological Survey
Online_Linkage: <https://pubs.usgs.gov/of/2003/of03-320/>
Description:
Abstract:
Lake Mead is a large interstate reservoir located in the Mojave Desert of southeastern Nevada and northwestern Arizona. It was impounded in 1935 by the construction of Hoover Dam and is one of a series of multi-purpose reservoirs on the Colorado River. The lake extends 183 km from the mouth of the Grand Canyon to Black Canyon, the site of Hoover Dam, and provides water for residential, commercial, industrial, recreational, and other non-agricultural users in communities across the southwestern United States. Extensive research has been conducted on Lake Mead, but a majority of the studies have involved determining levels of anthropogenic contaminants such as synthetic organic compounds, heavy metals and dissolved ions, furans/dioxins, and nutrient loading in lake water, sediment, and biota (Preissler, et al., 1998; Bevans et al, 1996; Bevans et al., 1998; Covay and Leiker, 1998; LaBounty and Horn, 1997; Paulson, 1981). By contrast, little work has focused on the sediments in the lake and the processes of deposition (Gould, 1951). To address these questions, sidescan-sonar imagery and high-resolution seismic-reflection profiles were collected throughout Lake Mead by the USGS in cooperation with researchers from University of Nevada Las Vegas (UNLV). These data allow a detailed mapping of the surficial geology and the distribution and thickness of sediment that has accumulated in the lake since the completion of Hoover Dam. Results indicate that the accumulation of post-impoundment sediment is primarily restricted to former river and stream beds that are now submerged below the lake while the margins of the lake appear to be devoid of post-impoundment sediment. The sediment cover along the original Colorado River bed is continuous and is typically greater than 10 m thick through much of its length. Sediment thickness in some areas exceeds 35 m while the smaller tributary valleys typically are filled with less than 4 m of sediment. Away from the river beds that are now covered with post-impoundment sediment, pre-impoundment alluvial deposits and rock outcrops are still exposed on the lake floor.
Purpose:
This shapefile is used to delimit the bounds of Lake Mead when at full capacity (approximately 375 m elevation)
Supplemental_Information:
This previously published dataset is provided as a courtesy in Open-File Report 1150 "Surficial Geology of the Floor of Lake Mead (Arizona and Nevada) as Defined by Sidescan-sonar Imagery, Lake Floor Topography and Post-impoundment Sediment Thickness", available online:<https://pubs.usgs.gov/of/2009/1150/>. Improvements have been made to this metadata file even though the originally published data have not been modified.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2003
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -114.896120
East_Bounding_Coordinate: -113.925150
North_Bounding_Coordinate: 36.589042
South_Bounding_Coordinate: 35.994675
Keywords:
Theme:
Theme_Keyword_Thesaurus: General
Theme_Keyword: ArcView
Theme_Keyword: bounds
Theme_Keyword: CMGP
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: OFR03-320
Theme_Keyword: Open-File report
Theme_Keyword: polygon
Theme_Keyword: shapefile
Theme_Keyword: shoreline
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Woods Hole Field Center
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: elevation
Theme_Keyword: inlandWaters
Place:
Place_Keyword_Thesaurus: General
Place_Keyword: Arizona
Place_Keyword: Black Canyon
Place_Keyword: Boulder Basin
Place_Keyword: Colorado River
Place_Keyword: Gregg Basin
Place_Keyword: Hoover Dam
Place_Keyword: Iceberg Canyon
Place_Keyword: Lake Mead
Place_Keyword: Las Vegas
Place_Keyword: Las Vegas Bay
Place_Keyword: Las Vegas Wash
Place_Keyword: Mojave Desert
Place_Keyword: Nevada
Place_Keyword: Overton Arm
Place_Keyword: United States
Place_Keyword: Virgin Basin
Place_Keyword: North America
Access_Constraints: NONE
Use_Constraints:
The U.S. Geological Survey and the Bureau of Reclamation must be referenced as the originator of the dataset in any future products or research derived from these data.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: VeeAnn A. Cross
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2251
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.2.6.1500
Cross_Reference:
Citation_Information:
Originator: H.E. Bevans
Originator: S.L. Goodbred
Originator: J.F. Miesner
Originator: S.A. Watkins
Originator: T.S. Gross
Originator: N.D. Denslow
Originator: T. Choeb
Publication_Date: 1996
Title:
Synthetic organic compounds and carp endocrinology and histology, Las Vegas Wash and Las Vegas and Callville bays of Lake Mead Nevada
Series_Information:
Series_Name: Water-Resources Investigations
Issue_Identification: 96-4266
Publication_Information:
Publisher: U.S. Geological Survey
Cross_Reference:
Citation_Information:
Originator: H.E. Bevans
Originator: M.S. Lico
Originator: S.J. Lawrence
Publication_Date: 1998
Title:
Water quality in the Las Vegas Valley area and the Carson and Truckee River basins, Nevada and California, 1992-1996
Series_Information:
Series_Name: Circular
Issue_Identification: 1170
Publication_Information:
Publisher: U.S. Geological Survey
Cross_Reference:
Citation_Information:
Originator: K.J. Couvay
Originator: T.J. Leiker
Publication_Date: 1998
Title:
Synthetic organic compounds in water and bottom sediment from streams, detention basins, and sewage-treatment plant outfalls in Las Vegas Valley, Nevada, 1997
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 98-633
Publication_Information:
Publisher: U.S. Geological Survey
Cross_Reference:
Citation_Information:
Originator: H.R. Gould
Publication_Date: 1951
Title: Some quantitative aspects of Lake Mead turbidity currents
Series_Information:
Series_Name: SEPM Special Publication
Issue_Identification: No. 2
Publication_Information:
Publisher: Society of Economic Paleontologists and Mineralogists
Cross_Reference:
Citation_Information:
Originator: J.F. LaBounty
Originator: M.J. Horn
Publication_Date: 1997
Title:
The influence of drainage from the Las Vegas Valley on the limnology of Boulder Basin, Lake Mead, Arizona-Nevada
Series_Information:
Series_Name: Journal of Lake and Reservoir Management
Issue_Identification: v. 13
Cross_Reference:
Citation_Information:
Originator: L.J. Paulson
Publication_Date: 1981
Title:
Nutrient management with hydroelectric dams on the Colorado River
Series_Information:
Series_Name: Technical Report
Issue_Identification: #8
Publication_Information:
Publication_Place:
Department of Biological Sciences, University of Nevada, Las Vegas, Nevada
Publisher: Lake Mead Limnological Research Center
Cross_Reference:
Citation_Information:
Originator: A.M. Preissler
Originator: G.A. Roach
Originator: K.A. Thomas
Originator: J.W. Wilson
Publication_Date: 1998
Title: Water resources data, Nevada, water year 1998
Series_Information:
Series_Name: Water Resources Data Nevada
Issue_Identification: NV-98-1
Publication_Information:
Publisher: U.S. Geological Survey

Data_Quality_Information:
Completeness_Report: The shoreline is complete for the areas surveyed in Lake Mead.
Lineage:
Process_Step:
Process_Description:
The original coverage was acquired from Bureau of Reclamation and represented the approximate location of the 375m contour around Lake Mead.
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Steve Belew
Contact_Organization: Bureau of Reclamation
Contact_Position: GIS Specialist
Contact_Address:
Address_Type: mailing address
Address: P.O. Box 61470
City: Boulder City
State_or_Province: NV
Postal_Code: 89006-1470
Contact_Voice_Telephone: 702-293-8150
Contact_Electronic_Mail_Address: sbelew@lc.usbr.gov
Process_Step:
Process_Description:
The coverage was simplified somewhat by such techniques as removing some of the smaller polygons.
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: VeeAnn A. Cross
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700x2251
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Process_Step:
Process_Description:
The coverage was then converted to a shapefile and converted from a UTM projection to a Geographic coordinate system.
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: VeeAnn A. Cross
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700x2251
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: G-polygon
Point_and_Vector_Object_Count: 147

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.000001
Longitude_Resolution: 0.000001
Geographic_Coordinate_Units: Decimal degrees
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name: North American Vertical Datum of 1988
Altitude_Distance_Units: meters
Altitude_Encoding_Method: Implicit coordinate

Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: lakebnds
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: BNDTYPE
Attribute_Definition: indicates whether the polygon encircles land (island) or water.
Attribute_Definition_Source: VeeAnn A. Cross
Attribute_Domain_Values:
Unrepresentable_Domain: character set

Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: David C. Twichell
Contact_Organization: U.S. Geological Survey
Contact_Position: Oceanographer
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2266
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: dtwichell@usgs.gov
Resource_Description: Downloadable Data
Distribution_Liability:
Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: WinZip
Format_Version_Number: 9.0
Format_Information_Content:
This WinZip file contains a polygon shapefile of the shoreline of Lake Mead as well as the accompanying metadata.
Transfer_Size: 1.233 MB
Fees: None.
Technical_Prerequisites:
The user must have software capable of uncompressing the WinZip file. Once uncompressed, the user must have software capable of reading the ESRI shapefile format.

Metadata_Reference_Information:
Metadata_Date: 20090804
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: VeeAnn A. Cross
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700x2251
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile

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