I'm not sure if this info has already been shared, but here it is for the Willamette basin:
http://www.nwp.usace.army.mil/Missions/Water.aspx
You can check out other regions in the drop down box under LOCATIONS.
I found the link for the Deschutes River Basin - http://www.usbr.gov/pn/hydromet/destea.html
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