Creating Streams with different accumulation areas help

Discussion created by gergyboy13 on Jul 23, 2013
Latest reply on Jul 24, 2013 by MBoucher21

I am USING USGS 1/9th Arc Second Dem data to determine watersheds. I also want to create a stream network with only creating the streams once the flow accumulation passes the 50 acre threshold. I no I need to use the raster calculator to create a new raster with only cells over a certain number and that's based the threshold I want but I can't seem to get this to work properly. I have been assuming the DEM cell sizes are 30m by 30m. Is there a way to determine the actual sizes?