Grand Avenue Bridge (USGS site: drainage area 32.6 sq.mi.)

An old USGS staff gauge (metal plate) is affixed to the leading right side of the bridge. This can be checked from shore before making your run, or checked from your boat as you pass through this location.

13.9' to 14.2': Bare bones minimum, total boat abuse. (Most boaters won't bother.)

14.2' to 14.5': Marginal (scrapy, but potentially fun, if you've never done it before).

14.5' to 14.8': Getting decent, but still 'thin' coming down Krueger Falls ('Minimums' for serious boaters.)

14.8' to 15.3': Getting juicy! (Low-Medium for serious boaters)

15.3' to 16.3': WILD (Medium-High for serious boaters.)

16.3'-17.0'+: WOWIE KAZOWIE! Freight train rush! Virtually no stopping start to finish!

NOTE: The plate gauge goes to 17.0'. If it is submerged, check 'Three Bar Bridge' in the Sauk Creek Conservancy for clearance before putting on upstream of it!