You mean recently or ever?
About all your questions are answered here:
Order the BLMs floaters map guide book which you can order here answers your questions in more detail:
Prineville District Office at 541-416-6700. Visa/MC and debit cards accepted.
2005 John Day River Recreation Guide ($6)
Kimberly to Tumwater Falls Spiral-bound waterproof floater's guide.
since the gooberment is still closed you can pay a couple more dollars and get the map book guide here:
Melinda Law's book is general not written very well and has inaccuracies, but her write up on this section of the John Day is pretty good:
Soggy sneakers also has the critical deets:
Check your local library to see if you can get inter library loans for both the Soggy Sneakers and Melinda Law book as they aren't worth buying if you live in Colorado.
If you review all of this stuff you won't have any more questions. Good luck.