Stats

Since this is the uppermost realistic put-in, here's some relevant stats (for the dataholics):

Drainage Area: 2 square miles
Development Upstreeam: 92.16%
Upstream Gradient: 29.7 FPM

While there definitely is evidence this comes to boatable flows with heavy rains, the combination of the tiny drainage area, along with pretty solid gradient upstream says boatable flows will not last very long ... often measured in hours rather than days.