Confluence Deer Creek/Underwood Creek: Drainage area: 16 sq.mi.

Immediately after you pass under Bluemound Road (or, using the alternate put-in, immediately after the brief rocky rapids) you reach a confluence.

Some references call one tributary Deer Creek and the other Underwood Creek. Other references label them Underwood and S.Br.Underwood. Still other evidence regarding the non-cement-ditch suggests it may be Indian Creek based upon a street named Indian Creek Parkway (well-upstream near Wirth Park).

If the relative flows (of the two entities at the confluence) happen to be just right, a bit of minor surfs or odd-current play may be possible here (though don't expect too much).

The combined drainage area at this point is about 16 square miles.