In 2004, about 90 migrating elk drowned after attempting to cross thin ice on the Mores Creek arm of Lucky Peak Lake upstream of the Highway 21 bridge (Idaho Fish and Game, 2010). To better understand the depths over a range of reservoir pool elevations in the Mores Creek Arm, the U.S. Geological Survey, in cooperation with the Lucky Peak Power Plant Project, conducted high-resolution multibeam echosounder (MBES) bathymetric surveys on the Mores Creek arm on Lucky Peak Lake. The MBES data will assist reservoir managers and wildlife biologists with regulating reservoir water surface elevations (WSE) to support successful big game migration across Mores Creek on Lucky Peak Lake. Data collection provided nearly 100 percent coverage of bed elevations within the survey extent and are used to create a depth raster and contour map for select water surface elevations of 2,960 ft, 2,965 ft, 2,970 ft, 2,975 ft, and 2,980 ft.

In 2004, about 90 migrating elk drowned after attempting to cross thin ice on the Mores Creek arm of Lucky Peak Lake upstream of the Highway 21 bridge (Idaho Fish and Game, 2010). To better understand the depths over a range of reservoir pool elevations in the Mores Creek Arm, the U.S. Geological Survey, in cooperation with the Lucky Peak Power Plant Project, conducted high-resolution multibeam echosounder (MBES) bathymetric surveys on the Mores Creek arm on Lucky Peak Lake. The MBES data will assist reservoir managers and wildlife biologists with regulating reservoir water surface elevations (WSE) to support successful big game migration across Mores Creek on Lucky Peak Lake. Data collection provided nearly 100 percent coverage of bed elevations within the survey extent and are used to create a depth raster and contour map for select water surface elevations of 2,960 ft, 2,965 ft, 2,970 ft, 2,975 ft, and 2,980 ft.

In 2004, about 90 migrating elk drowned after attempting to cross thin ice on the Mores Creek arm of Lucky Peak Lake upstream of the Highway 21 bridge (Idaho Fish and Game, 2010). To better understand the depths over a range of reservoir pool elevations in the Mores Creek Arm, the U.S. Geological Survey, in cooperation with the Lucky Peak Power Plant Project, conducted high-resolution multibeam echosounder (MBES) bathymetric surveys on the Mores Creek arm on Lucky Peak Lake. The MBES data will assist reservoir managers and wildlife biologists with regulating reservoir water surface elevations (WSE) to support successful big game migration across Mores Creek on Lucky Peak Lake. Data collection provided nearly 100 percent coverage of bed elevations within the survey extent and are used to create a depth raster and contour map for select water surface elevations of 2,960 ft, 2,965 ft, 2,970 ft, 2,975 ft, and 2,980 ft.

In 2004, about 90 migrating elk drowned after attempting to cross thin ice on the Mores Creek arm of Lucky Peak Lake upstream of the Highway 21 bridge (Idaho Fish and Game, 2010). To better understand the depths over a range of reservoir pool elevations in the Mores Creek Arm, the U.S. Geological Survey, in cooperation with the Lucky Peak Power Plant Project, conducted high-resolution multibeam echosounder (MBES) bathymetric surveys on the Mores Creek arm on Lucky Peak Lake. The MBES data will assist reservoir managers and wildlife biologists with regulating reservoir water surface elevations (WSE) to support successful big game migration across Mores Creek on Lucky Peak Lake. Data collection provided nearly 100 percent coverage of bed elevations within the survey extent and are used to create a depth raster and contour map for select water surface elevations of 2,960 ft, 2,965 ft, 2,970 ft, 2,975 ft, and 2,980 ft.

In 2004, about 90 migrating elk drowned after attempting to cross thin ice on the Mores Creek arm of Lucky Peak Lake upstream of the Highway 21 bridge (Idaho Fish and Game, 2010). To better understand the depths over a range of reservoir pool elevations in the Mores Creek Arm, the U.S. Geological Survey, in cooperation with the Lucky Peak Power Plant Project, conducted high-resolution multibeam echosounder (MBES) bathymetric surveys on the Mores Creek arm on Lucky Peak Lake. The MBES data will assist reservoir managers and wildlife biologists with regulating reservoir water surface elevations (WSE) to support successful big game migration across Mores Creek on Lucky Peak Lake. Data collection provided nearly 100 percent coverage of bed elevations within the survey extent and are used to create a depth raster and contour map for select water surface elevations of 2,960 ft, 2,965 ft, 2,970 ft, 2,975 ft, and 2,980 ft.

In 2004, about 90 migrating elk drowned after attempting to cross thin ice on the Mores Creek arm of Lucky Peak Lake upstream of the Highway 21 bridge (Idaho Fish and Game, 2010). To better understand the depths over a range of reservoir pool elevations in the Mores Creek Arm, the U.S. Geological Survey, in cooperation with the Lucky Peak Power Plant Project, conducted high-resolution multibeam echosounder (MBES) bathymetric surveys on the Mores Creek arm on Lucky Peak Lake. The MBES data will assist reservoir managers and wildlife biologists with regulating reservoir water surface elevations (WSE) to support successful big game migration across Mores Creek on Lucky Peak Lake. Data collection provided nearly 100 percent coverage of bed elevations within the survey extent and are used to create a depth raster and contour map for select water surface elevations of 2,960 ft, 2,965 ft, 2,970 ft, 2,975 ft, and 2,980 ft.

In 2004, about 90 migrating elk drowned after attempting to cross thin ice on the Mores Creek arm of Lucky Peak Lake upstream of the Highway 21 bridge (Idaho Fish and Game, 2010). To better understand the depths over a range of reservoir pool elevations in the Mores Creek Arm, the U.S. Geological Survey, in cooperation with the Lucky Peak Power Plant Project, conducted high-resolution multibeam echosounder (MBES) bathymetric surveys on the Mores Creek arm on Lucky Peak Lake. The MBES data will assist reservoir managers and wildlife biologists with regulating reservoir water surface elevations (WSE) to support successful big game migration across Mores Creek on Lucky Peak Lake. Data collection provided nearly 100 percent coverage of bed elevations within the survey extent and are used to create a depth raster and contour map for select water surface elevations of 2,960 ft, 2,965 ft, 2,970 ft, 2,975 ft, and 2,980 ft.

In 2004, about 90 migrating elk drowned after attempting to cross thin ice on the Mores Creek arm of Lucky Peak Lake upstream of the Highway 21 bridge (Idaho Fish and Game, 2010). To better understand the depths over a range of reservoir pool elevations in the Mores Creek Arm, the U.S. Geological Survey, in cooperation with the Lucky Peak Power Plant Project, conducted high-resolution multibeam echosounder (MBES) bathymetric surveys on the Mores Creek arm on Lucky Peak Lake. The MBES data will assist reservoir managers and wildlife biologists with regulating reservoir water surface elevations (WSE) to support successful big game migration across Mores Creek on Lucky Peak Lake. Data collection provided nearly 100 percent coverage of bed elevations within the survey extent and are used to create a depth raster and contour map for select water surface elevations of 2,960 ft, 2,965 ft, 2,970 ft, 2,975 ft, and 2,980 ft.

In August 2024, the U.S. Geological Survey Idaho Water Science Center (USGS IDWSC), in cooperation with the United States Bureau of Reclamation (USBR), completed bathymetric and topographic surveys at Black Canyon Reservoir near Emmett, Idaho using a multibeam sonar and boat-mounted Light Detection and Ranging (LiDAR). The bathymetric and topographic data generally include complete data coverage from Black Canyon Dam to Black Canyon Park with sparse data coverage upstream of Black Canyon Park and data represent conditions on August 19-20, 2024 when the water surface elevation was steady at about 2,497.8 feet (Reclamation Project Vertical Datum). Prior to the bathymetric and topographic surveys, USBR completed aerial surveys using uncrewed aircraft systems to collect aerial imagery and develop elevation models using structure from motion techniques. These aerial surveys were completed on November 28-29, 2023 during a period of reservoir pool drawdown when the water surface elevation was between about 2,461 feet and 2,465.7 feet (Reclamation Project Vertical Datum). While these topographic elevation data provided high-resolution and spatially expansive coverage, the structure from motion technique does not perform well for reconstructing submerged topography. As such, IDWSC was tasked with collecting bathymetric data in areas where elevation data could not be reconstructed from aerial surveys. Collectively, bathymetric data from USGS IDWSC and topographic data from USBR may be used for further improvement of existing reservoir stage-capacity relationships of Black Canyon Reservoir.

In August 2024, the U.S. Geological Survey Idaho Water Science Center (USGS IDWSC), in cooperation with the United States Bureau of Reclamation (USBR), completed bathymetric and topographic surveys at Black Canyon Reservoir near Emmett, Idaho using a multibeam sonar and boat-mounted Light Detection and Ranging (LiDAR). The bathymetric and topographic data generally include complete data coverage from Black Canyon Dam to Black Canyon Park with sparse data coverage upstream of Black Canyon Park and data represent conditions on August 19-20, 2024 when the water surface elevation was steady at about 2,497.8 feet (Reclamation Project Vertical Datum). Prior to the bathymetric and topographic surveys, USBR completed aerial surveys using uncrewed aircraft systems to collect aerial imagery and develop elevation models using structure from motion techniques. These aerial surveys were completed on November 28-29, 2023 during a period of reservoir pool drawdown when the water surface elevation was between about 2,461 feet and 2,465.7 feet (Reclamation Project Vertical Datum). While these topographic elevation data provided high-resolution and spatially expansive coverage, the structure from motion technique does not perform well for reconstructing submerged topography. As such, IDWSC was tasked with collecting bathymetric data in areas where elevation data could not be reconstructed from aerial surveys. Collectively, bathymetric data from USGS IDWSC and topographic data from USBR may be used for further improvement of existing reservoir stage-capacity relationships of Black Canyon Reservoir.