Nope, no numbering system. I believe I ran across some DNR info awhile back that stated there was 160 wingdams south of Lake Pepin and north of the L&D at Alma. That’s a bunch of dams! Many silted in a long time back so there aren’t QUITE that many to fish…. but there’s a lot of ground to cover. The best way to determine correct water flow on a dam is through experience but, generally speaking now, if you can’t fish effectively with a 1/4 -1/2 ounce jig/bait you’ve likely got too much current on the dam. Size of your bait and depth on a dam are certainly factors with this so its certainly not a hard and fast rule….. I’ve caught fish on dams with a heck of a lot more current than I EVER thought they’d be willing to tolerate.
Hope this helps bud.
James Holst
Moving Waters Guide Service
http://www.movingwaters.net
