They are considered a game fish these days along with carp for some reason. Normally fish like these are considered "rough fish" carp, sucker, drum ect. Thanks for your reply keef. I'm aware that they are two different species. Other post deleted, duh. Thanks Bud!
As I read the regulations there are no limits on them. Something I find ridiculous. They're not all that common, an excellent fighter, and good eating. I asked why they don't "manage" them and the answer was they're not in the hatchery system. I'll not expound on that at this point. I personally think they should have a limit of 5 to 10 at most. That's more than plenty.
As to waters with them, any South Platte or Arkansas river reservoir on the plains have small populations of them.