Hi, I fish the Columbia near the tri-cities and to tell you the truth, I can't keep the bass off my line this time of year! I'm not sure if you are fishing from a boat or from the shore? Anyhow, fish ANY rocky bottom with ANY change in shoreline or disruption of water flow. Also, find an area where there are changes in depth.
After location, get a white or brown 3" grub, tip it with a worm, and bounce it off bottom. This will at least get you bites and fish! If you don't get a bite after five to ten minutes...change locations.
Hope this helps.