Crappie can be caught year round on the Chicago river.
Here's another Chicago river sign that, if located, can help you secure fine specks.
Fish the wood. Use traditional techniques and light line.
Find these Chicago river signs and you may find large crappies (in certain months).
More on the river 7-11-17
More of the trip on the river 7-11-17
Report is from 7-11-17
Finally had time to hit this very close to home hot bite...guys have been telling me stories for quite awhile and I finally had an off day to get there....we launched at the ramp at Western Ave. ..after a nice ride in you'll notice the scenery change from an industrial park setting to one of parks, greenery and river edge walk ways....very cool...we caught fish at almost every spot checked...numbers were great and size was above average for the area...even the crappie were thick and abundant ...they had the spawning colors on,which I thought was late in the season,but with the turbulent weather we've seen I guess it was happening...water clarity was better than 3 feet and the casted plastics, plain were smacked on almost every cast!!!
81° - 88° F
All 3 bites were really light but at least the second bite put up a good fight. I really think it was a LMB. I am using a 4 inch watermelon senko with Red/Blk flake, texas rigged with a bullet weight. Nothing fancy. Just lightly jigging it near the walls and stumps. They are biting when you dance it. You have to get them excited. Now that they are biting, I will be fishing and posting more often.
Oh wait,., rain for the next week.