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Bathy_NCRO_20240508_LakeDelValle_Interpolated_3ft_COG.tif
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This bathymetric dataset is intended to be used to update bathymetry of the Lake, document any apparent issues with submerged fixed works, and serve as a component in studies of sediment accumulation rates.
This is an official DWR Image Service, which meets all appropriate requirements of the DWR Spatial Data Standards, specifically the DWR Spatial Data Standard version 3.6, dated September 27, 2023.
DWR makes no warranties or guarantees — either expressed or implied — as to the completeness, accuracy, or correctness of the data. DWR neither accepts nor assumes liability arising from or for any incorrect, incomplete, or misleading subject data.
This Image Service was published on 12/12/2024, by Bianca Pertl of the DWR Division of Engineering, who may be contacted at 916-757-3593, or at bianca.pertl@water.ca.gov. Comments, problems, improvements, updates, or suggestions should be forwarded to the official DWR point of contact as available and appropriate.
<div style='text-align:Left;'><div><div><p><span>The California Department of Water Resources (DWR), North Central Region Office (NCRO), Bathymetry Data Collection Section, conducted a bathymetric survey of Lake Del Valle for the Delta Field Division (DFD). The main purpose of the data is to provide an updated elevation surface for the Lake and to assess sedimentation rates. This dataset is an interpolated surface comprised of three components: multibeam bathymetry throughout most of the Lake, singlebeam bathymetry in the southermost shoal areas near the intlet from Arroyo Del Valle, and lidar data above elevation 705.5 ft NAVD88 flown by Towill, Inc. for DWR in May, 2023. Areas derived from interpolated regions beyond the bounds of relevant new data are denoted in the related layer in this geodatabase NCRO_Bathy_LakeDelValle_May2024_Data_Extents. </span></p><p><span>• Field Dates: March 18-21 and May 6-8, 2024 </span></p><p><span>• Survey Type: Multibeam and Singlebeam</span></p><p><span>• Data Density: 3 foot grid </span></p><p><span>• Horizontal Datum: North American Datum of 1983 (NAD83), California Coordinate System (CCS83) State Plane Zone 3, US feet </span></p><p><span>• Vertical Datum: North American Vertical Datum of 1988 (NAVD88) geoid 18, US feet </span></p><p><span>• Processing Epoch: 2024.353; CSRC Datum Epoch: 2017.5 </span></p><p><span>• Related Datasets: Lake Del Valle NCRO bathymetry 2018, Towill Lidar, 2023 </span></p><p><span>• Involved Staff: Data collected and processed by NCRO Bathymetry and Hydrography sections </span></p><p><span>• Survey Responsible Charge: Jacob Wright, PLS (CA 8717) </span></p><p><span>Please see associated survey report for full control and QC check details. </span></p><p><span>For complete metadata make sure the viewer (ArcGIS or other software) is set to view FGDC metadata.</span></p><p><span /></p></div></div></div>
California Department of Water Resources, Division of Regional Assistance, North Central Region Office, Hydrography and Technical Support. Lidar data credit: Towill, Inc., 2023.
Bathy_NCRO_20240508_LakeDelValle_Interpolated_3ft
Inland Waters
Lake Del Valle
East Bay Parks
Bathymetry
Sonar
Elevation
March
May
2024
Multibeam
<div style='text-align:Left;'><div><div><p><span>This dataset was valid at the time it was measured, however, changes may have occurred since and these data may no longer represent actual surface conditions. Acknowledgement of the Department of Water Resources, NCRO, Hydrography and Technical Support is appreciated for products derived from these data. Towill, Inc. should additionally be acknowledged in any products that make use of the terrestrial lidar data above 705.5 ft NAVD88.</span></p></div></div></div>
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