For special events info:
UMD's Recreational Sports Outdoor Program
Release flows for select weekends are a result of negotiations between American Whitewater, UMD Recreational Sports Outdoor Program Kayak and Canoe Institute, and Minnesota Power.
Reported capacity of penstock/power-plant is 3000 cfs, so you can approximate flows in this reach by subtracting 3000 from gauge reading displayed. (Obviously this neglects inflows downstream of the gauge, and assumes plant is operating at full capacity.)
More accurate flow information can be obtained here:
https://www.mnpower.com/Environment/WaterTable
Description
Note: All flow information mentioned in this description is _actual flow_ in the reach, not flow as measured by the online gauge.
Fish Flow (250 CFS) should be available at all times from May 1st to October 1st. Levels will be higher during spring snowmelt or after heavy rains, when upper and lower dams are releasing a lot of water.
While some local paddlers will do (at least parts of) the run at fish-flow, it is marginal at anything under 600 cfs, with 800-900 preferable.
Generally, here are suggested lines for varying water levels:
Octopus: Run left from fish flow to 600 cfs, run right line from 600 to 1500 cfs, run sneak above 1800 cfs.
Second Sister: Run sneak above 1500 cfs.
Swinging Bridge river-right waterfall: good starting about 1900 cfs.
Fin Falls: good from 350-1000 cfs (gets really beefy about 900, use judgement).
Oldenberg ('Miracle Mile'): generally run from 600-900 cfs.
These are all approximate guidelines, and obviously boaters will each have their preferences (I.E., may choose to run these rapids differently).
Check out some helmet-cam footage of the run (ending with Fin Falls) on this YouTube video:
https://youtu.be/8FSkgzNLE\_o