many man-made outlets for Devil's Lake have been proposed over the last few years, but they've all been rejected by Minnesota and/or Manitoba. the Canadians don't want it because of fears it would drain into the Red River (of the North) which flows north to Lake Winnepeg, no small lake itself. here's yet another link to this story:
http://news.mpr.org/features/199906/08_gundersond_devil-m/


p.s. - how many DLs are there? I don't know of any way to determine that. I do know of one in ND, MN, WI and MI, each. the ones in ND and MI actually have towns of that name.