I have added river banks and islands along the South Platte from Chatfield Dam, south of Denver, to the Nebraska/Colorado line. I must confess that I got distracted along the way and reclassified and aligned some nearby highways and railways along the way.
Interestingly, some of the imagery has been updated since I started and some of the river banks are considerably different from those I first mapped. It looks like the more recent images may have been gathered during a period of high water and the older pictures during a drought.
Oh well, back to Potlatch for some remapping...