Shapefile for the shoreline of Lake Mead

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

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