Columbia current speed??

Quick question for those who have been on the Columbia recently.

How fast is the current approximately?

I would like to guesstimate my time ibn the water between two points. Specifically I5 bridge to Davis Bar

Totally depends on the tides.  You can expect anywhere from .5 to 3MPH.  Wind is going to affect your plans more than current will.

-Mark-

 Go take a look at Deep Zoom Nautical Charts. Zero in on the location you need and it will provide you with current speed, depth, tides and more.
 Here is the link---http://www.deepzoom.com/indexSilverlight.aspx#/Views/Boat.xaml

In early September when flows are lowest the incoming tide will actually reverse the flow.  You can really tell while diving.