Data Release of Capacity and Area of Grand Lake O' the Cherokees, Northeastern Oklahoma, 2009

The U.S. Geological Survey, in cooperation with the Grand River Dam Authority, computed a 2009 capacity and area table of Grand Lake O' the Cherokees. The capacity and area table defines the relation between the elevation of the water surface and the volume and area of water that is impounded. The capacity and area of Grand Lake O' the Cherokees were computed from a Triangular Irregular Network (TIN) surface created in Esri ArcGIS 10.5.1, a geographic information system (GIS). The TIN surface was created from three datasets: (1) a 2009 Oklahoma Water Resources Board (OWRB) bathymetric survey of Grand Lake (OWRB, 2009, 2016), (2) a 2017 USGS bathymetric survey of the Neosho, Spring, and Elk Rivers (Hunter and others, 2017; Smith and others, 2017), and (3) a 2010 lidar-derived digital elevation model (DEM) (USGS, 2016a). Where the USGS and OWRB survey data overlapped, the more recently collected USGS data were given preference. The DEM data were used in areas with land-surface elevations above the conservation pool elevation of 743.40 ft above NAVD88. Because the OWRB (2009) bathymetric survey data were the predominant source of data used (in terms of quantity and areal coverage), the results and products of this data release and the report (Hunter and Labriola, 2019) were considered to reflect bathymetric conditions in 2009.