Andrew and Matt did this run last year and thought the slides were very fun. Andrew mentioned a scary peal out at the put-in, Matt didn't seem to think it was so bad. Watch the video and determine for yourself if its worth your efforts for what look to be some really cool rapids.
Falls creek, WA from Andrew Bradley on Vimeo.
Sorry, Andrew didn't remember what the flows were but referred to it as a "good summer run". From what I read on the Oregonkayaking site, it seems like 1,000 cfs in the EF Lewis would do.
Maybe Matt jotted down the flow?