Pewaukee - Hwy.J to Hwy.F Waukesha (1.6 miles) (WI)
Approximate - nearest available gauge. Use as general reference only.
USGS lists a sampling site at Busse Road (somewhat midway down this section) showing drainage area as 37.8 square miles. This is 0.3 times the active gauge on the Fox in Waukesha.