1.0 DCPLUS 20250203 16421500 20250317 16421500 https://www.arcgis.com/sharing/rest/content/items/ac4dcf9350014b35801beaf91aed2c18/info/thumbnail/ago_downloaded.png https://www.arcgis.com/home/item.html?id=ac4dcf9350014b35801beaf91aed2c18 ac4dcf9350014b35801beaf91aed2c18 Feature Service https://services.arcgis.com/uUvqNMGPm7axC2dD/arcgis/rest/services/High_Water_Marks_Collection_view/FeatureServer High Water Marks Collection view 2025-02-03T16:42:15 2025-03-17T22:29:02 flood data flood oregon natural hazard Read-only view of HWM data collection through Survey123. <p style='box-sizing:border-box; margin-top:0px; margin-bottom:1.5rem; font-size:16px; font-family:&quot;Avenir Next W01&quot;, &quot;Avenir Next W00&quot;, &quot;Avenir Next&quot;, Avenir, &quot;Helvetica Neue&quot;, sans-serif;'>When floods happen, collecting high water marks (HWM) can contribute to future flood prediction models and river analysis. Reliable records of past HWMs are used to improve the accuracy of river systems modeling and can be used to calculate and predict future flood events. Learn how to collect HWMs and what types of HWMs can show the extent of flooding with <a href='https://storymaps.arcgis.com/stories/fcd14433e7ba42e58701f16aa8852123' style='box-sizing:border-box; background-color:transparent;' target='_blank' rel='nofollow ugc noopener noreferrer'>this storymap guide on collecting high water marks</a>.</p> -180.0 180.0 90.0 -90.0 1 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 ac4dcf9350014b35801beaf91aed2c18 https://services.arcgis.com/uUvqNMGPm7axC2dD/arcgis/rest/services/High_Water_Marks_Collection_view/FeatureServer Feature Service EPSG