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Measure area, distance, and location:
Map extent and scale:
Information shown on this map should not be used for navigation, regulatory, permitting, or other legal purposes. Although USGS intends to make this server available 24 hours a day, 7 days a week, timely delivery of data and products from this server through the Internet is not guaranteed. The USGS provides these maps “as-is” for a quick reference, emergency planning tool but assumes no legal liability or responsibility resulting from the use of this information.
Although the lake-inundation maps represent the boundaries of inundated areas with a distinct line, some uncertainty is associated with these maps. The lake boundaries shown were estimated based on water-surface elevations measured at USGS station 07190000, Lake O' the Cherokees at Langley, OK, and assume a uniform elevation across the entire lake. The accuracy of the inundated areas portrayed on these maps is also dependent on the accuracy of the digital elevation model (DEM) used to simulate the land surface. The stated vertical accuracy of the source DEM (obtained by lidar survey on December 3-29, 2010) is about 16 centimeters (6 inches). Lake-bottom elevation (bathymetry) contours were surveyed in 2009 by the Oklahoma Water Resources Board
The U.S. Army Corps of Engineers maintains current and historic data on lake stage and storage at Grand Lake.
The target managed lake elevation is dependent on the time of year. [more]