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Collection of boreholes and well logs from Washington State


Jeschke, D. A.; Eungard, D. W.; Troost, K. G.; Wisher, A. P, 2019, Subsurface database of Washington State--GIS data: Washington Geological Survey Digital Data Series 11, version 2.1, previously released August, 2017 []


Records in this collection are classified into one of four categories that best characterizes the data contained within the borehole record. The classifications are: Geotechnical: Boreholes and pits created with the intent to gain a detailed understanding of the subsurface lithology and soil or rock properties therein. These records have additional data beyond lithologic descriptions including penetrometer resistance, shear and strength tests, density measurements, etc. Lithologic borings: Boreholes are drill solely for the purpose of identifying subsurface lithology. Material testing techniques were not used (or the results are not provided) to allow for a more detailed understanding of subsurface material properties. Test pits: Generally [...]

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wa_well_logs_20180720_reformatted.csv 76.88 MB text/csv
wa_well_logs_20180720_reformatted_part2.csv 16.57 MB text/csv

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Subsurface data available by download at [] or through our portal at []


These data are intended to be used by used by geologists, engineers, planners, private-sector geoscientists, and the general public to identify geologic hazards, perform analyses of slope stability, downslope and downstream impacts, storm water management, and identify mitigation opportunities for construction or other land-development projects. Subsurface data is also used in mining, oil and gas exploration, carbon sequestration, and geothermal exploration.


The Washington Geological Survey (WGS) shall not be held liable for improper or incorrect use of the data described and/or contained herein. This product is provided 'as is' without warranty of any kind, either expressed or implied, including, but not limited to, the implied warranties of merchantability and fitness for a particular use. The Washington State Department of Natural Resources and the authors of this product will not be liable to the user of this product for any activity involving the product with respect to the following: (a) lost profits, lost savings, or any other consequential damages; (b) the fitness of the product for a particular purpose; or (c) use of the product or results obtained from use of the product. Although these data have been processed successfully on computers of WGS, no warranty, expressed or implied, is made by WGS regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty.


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Additional Information


Type Scheme Key
sourceSystem CSC 1088703
UniqueKey State Inventory P961

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