I just checked out Black Dog, as the weather service said it was near flood stage. Wow, it is really up. I have never been down there during the spring run off, but it sure looked different than when I fished there last summer. The water is flowing into Black Dog lake from the river at the 35W spillway. There are still sheets of ice coming down, I assume remnants of the flooding from ice jams out west.
The river is basically one consistent current from shore to shore. It got me to thinking a guy might have some luck against a cut-bank, a few feet out, if he could find a calm area protected from the current. I should say, relatively calm. I sure wish the water was 50+ degrees, if you catch my drift.
Here’s the river side of the spillway. That guy had about a 10# carp onshore.
Here you can kind of see the current flowing from the river into the canal between the river and the lake.
If I only had a front-loader!
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It’s hard from the picture to gauge how big these trees were. It had to be about 4′ in circumference, if not more. There’s a perfect little hollow on the right one for a flat to take a nap in and a great school district to raise some fry in. 
I have a few other pictures, but those will remain in my private stash. 