Here the river flows through the Hells Canyon National Recreation Area and forms the boundary between Idaho and Oregon. The 652,488-acre recreation area includes the nearly 215,000-acre Wells Canyon Wilderness with the Snake River flowing through and adjacent to it.
According to Remodeling Magazine, a 200-square foot sunroom addition with footings and slabs-on-grade foundation can cost up to $70,000, while a survey conducted on HomeAdvisor.com found the average cost on sunroom additions ran around $16,315.
The average cost of a 20 x 14 sun room varies greatly depending on  the materials used and the area where the sun room is being built.  On average, a sun room this size woulâ¦d be about 18,000 dollars or  more depending on the number of windows.