Windows 10 and Windows 11 are supported for ArcGIS 10.8.
The serves a very specific purpose: keeping legacy floodplain mapping projects alive on the final version of ArcMap. GeoRAS 10.2.1 is stable, reliable for 1D models, and will run for the next 3-5 years on maintained Windows 10 systems. hec georas for arcgis 108 upd
If you’re working with floodplain mapping, hydraulic modeling, or river hydraulics, you’ve likely encountered the powerful combination of and HEC-GeoRAS . For those using ArcGIS 10.8, staying up to date with the correct version of the GeoRAS extension is critical. Windows 10 and Windows 11 are supported for ArcGIS 10