Name: WA_TDZ_inundation_extent_2021

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Description: Washington State's adoption of the 2021 International Building Code (IBC) included an amendment to adopt the ASCE 7-22 tsunami loads chapter with amendments that direct designers, engineers, or architects to use the Washington Tsunami Design Zone Maps (WA-TDZ) to determine whether structures in Risk Category III or IV need to be designed for tsunamis. Special design parameters must be considered for these structures if they are located in the WA-TDZ. Further, the code requires the use of WA Department of Natural Resources (DNR) Tsunami Inundation Data for design purposes, or that such data be considered as a baseline for self-conducted studies. Please consult the 2021 Washington State Building Code for official language.The data provided in feature class were derived from merged datasets from several tsunami hazard publications for the Cascadia Subduction Zone. For detailed methodology and metadata please refer to the source publications listed below. In July of 2024 this feature class was revised per the lineage process description to more closely match the source publications.Source PublicationsAllan, J. C.; Zhang, Joseph; O'Brien, F. E.; Gabel, L. L., 2018, Columbia River tsunami modeling: Toward improved maritime planning response: Oregon Department of Geology and Mineral Industries, Special Paper 51, 77 p.Dolcimascolo, Alexander; Eungard, D. W.; Allen, Corina; LeVeque, R. J.; Adams, L. M.; Arcas, Diego; Titov, V. V.; González, F. I.; Moore, Christopher; Garrison-Laney, C. E.; Walsh, T. J., 2021, Tsunami hazard maps of the Puget Sound and adjacent waters—Model results from an extended L1 Mw 9.0 Cascadia subduction zone megathrust earthquake scenario: Washington Geological Survey Map Series 2021-01, 16 sheets, scale 1:48,000, 49 p. text.Dolcimascolo, Alexander; Eungard, D. W.; Allen, Corina; LeVeque, R. J.; Adams, L. M.; Arcas, Diego; Titov, V. V.; González, F. I.; Moore, Christopher; Garrison-Laney, C. E.; Walsh, T. J., 2022, Tsunami hazard maps of the Olympic Peninsula—Model results from an extended L1 Mw 9.0 Cascadia subduction zone megathrust earthquake scenario: Washington Geological Survey Map Series 2022-01, 14 sheetsEungard, D. W.; Forson, Corina; Walsh, T. J.; Gica, Edison; Arcas, Diego, 2018, Tsunami hazard maps of southwest Washington-Model results from a ~2,500-year Cascadia subduction zone earthquake scenario: Washington Geological Survey Map Series 2018-01, 4 sheets, scale 1:48,000, 11 p. text.Eungard, D. W.; Forson, Corina; Walsh, T. J.; González, F. I.; LeVeque, R. J; Adams, L. M., 2018, Tsunami hazard maps of Port Angeles and Port Townsend, Washington—Model results from a ~2,500-year Cascadia subduction zone earthquake scenario: Washington Geological Survey Map Series 2018-03, partially superseded by Map Series 2022-01, 6 sheets, scale 1:11,000 and 1:16,000, 11 p. text.Walsh, T. J.; Gica, Edison; Arcas, Diego; Titov, V. V.; Eungard, D. W., 2016, Tsunami hazard maps of the San Juan Islands, Washington—Model results from a Cascadia subduction zone earthquake scenario: Washington Division of Geology and Earth Resources Map Series 2016-01, partially superseded by Map Series 2021-01, 4 sheets, scale 1:24,000 and 1:48,000, 9 p. text.

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