Alaska
Alaska USGS Waterdata Site and NOAA site for Alaska
http://waterdata.usgs.gov/ak/nwis/current/?type=flow
http://aprfc.arh.noaa.gov/ak_ahps2.php
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Idaho
NOAA River Forecasts and Data
USGS Idaho Water Gauges
Idaho Power Hells Canyon River Flows
Idaho Power Station List and Stream Flow Data
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Pacific Northwest
Dept. Reclamation Hydromet. (includes Reservoir Storage Informatio)