I'm not sure if it's the same exact minnow but I've seen, caught, and used for bait, a minnow that fits the description, in the Gravel pits on the Coyote Creek Parkway near the Tomcats model airplane field.
With one of these baits I LDR'd (Long Distance Released) a bass that would have definitely beat my biggest yet, well over 7#'s.

Tight lines,
Wade