I now have put together I believe the best map of Oahe Lake you can buy for any price but I sell it for 100.00.It includes Roadbeds,Foundations,Railroads,Ponds,Trees and a lot more.This map covers the entire length of Lake Oahe which is 162 miles long.This map is built with the same high quality as My Kansas and Missouri Lake.If you go to my website you can see a couple of screen shots on the HDS 10. This map covers more area than my Kansas and Missouri lakes combined.