Trask and Cummins basins

for your overheads

and this

Here's Trask, Chrysten

20001 data: The first value is the slope in degrees, truncated to an integer.
The second value is the cell count.
stuff from 2000:

Oregon Coast Range Creeks: Deton, Larson, Sullivan

From top to bottom: Larson Creek, Sullivan Creek, and the frequently-misspelled Deton Creek. The background is a corner of the Allegany quadrangle.

Download binned hypsometry:
This should be what you need to calculate erosion rates, Paul.

And here's Drift Creek:
Download binned Drift Creek hypsometry