Approximate - nearest available gauge. Use as general reference only.
Using this access point changes the length of river trip only slightly (actually about 0.3 mile shorter), but doubles the length of the shuttle. Nonetheless, it may be advantageous to use this access when Hemlock River is rather low (I.E., when it will be a bump-and-scrape to get to the confluence). You will have 1.75 miles of flatwater (on the Paint), versus 2.15 miles of bump-and-scrape boulderbed (on the Hemlock).
By my best reckoning, drainage area at this point is in the neighborhood of 412 square miles. Hemlock will add its 53+ sq.miles in before the rapids begin.