{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Robert Swanson", "hasEmail": "mailto:rswanson@usgs.gov"}, "description": "The U.S. Geological Survey, in cooperation with The Central Nebraska Public Power and \nIrrigation District (CNPPD), conducted a study that used bathymetric and topographic \nsurveying in conjunction with Geographical Information Systems techniques to determine \nthe 2003 physical shape and storage capacity, as well as the change in storage capacity \nof Lake McConaughy that occurred over 62 years. By combining the bathymetric and \ntopographic survey data, the 2003 surface area of Lake McConaughy was determined \nto be 30,413.0 acres, with a volume of 1,756,300 acre-feet at the lake conservation-pool \nelevation of 3,266.4 feet above North American Vertical Datum of 1988 (3,265.0 feet \nabove CNPPD datum). To determine the changes in storage of Lake McConaughy, the \n2003 survey Digital Elevation Model (DEM) was compared to a preconstruction DEM \ncompiled from historical contour maps. This comparison showed an increase in elevation \nat the dam site due to the installation of Kingsley Dam. Immediately to the west of the \nKingsley Dam is an area of decline where a borrow pit for Kingsley Dam was excavated. \nThe comparison of the preconstruction survey to the 2003 survey also was used to \nestimate the gross storage capacity reduction that occurred between 1941 and 2002. \nThe results of this comparison indicate a gross storage capacity reduction of approximately \n42,372 acre-feet, at the lake conservation-pool elevation of 3,266.4 feet in NAVD 88 \n(3,265.0 feet in CNPPD datum). By comparing preconstruction and 2003 survey data \nand subtracting the Kingsley Dam and borrow pit, the total estimated net volume of \nsediment deposited from 1941 to 2003 was 53,347,124 cubic yards, at an annual \naverage rate of 860,437 cubic yards per year. The approximate decrease in the net \nstorage capacity from 1941 to 2003 was 33,066 acre-feet, at an annual average decrease \nof approximately 533 acre-feet per year, which resulted in a 1.8 percent decrease in \nstorage capacity of Lake McConaughy. The lake accumulated most of the sediment in \nthe original river channel and in the west end of the delta area on the upstream end of \nthe lake.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P9UFVZ2S", "description": "Landing page for access to the data", "format": "XML", "mediaType": "application/http", "title": "Digital Data"}, {"@type": "dcat:Distribution", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.e9bf31c3-cc86-4ff8-ad8b-f1d4162773d1.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_e9bf31c3-cc86-4ff8-ad8b-f1d4162773d1", "keyword": ["Keith County", "Lake McConaughy", "Nebraska", "USGS:e9bf31c3-cc86-4ff8-ad8b-f1d4162773d1", "geoscientificInformation", "inlandWaters", "topography, hydrographic survey"], "modified": "2020-11-17T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-102.022595, 41.192180, -101.669107, 41.311195", "theme": ["geospatial"], "title": "Elevation point file for Lake McConaughy, Nebraska"}