I find it rather nifty to have a local fly fisherman author who puts up posts about fishing the Spokane area. He relates it to other waters but I see the parts of Spokane in the pics. This one is especially useful given my fishing spot beneath the highway bridge a 1/4 mile away.
https://www.thetriplehaul.com/post/reading-the-water-around-bridge-piers-a-fly-fisher-s-guide-to-cylindrical-structures