Just choose a state and hit submit....then chose a gauging station and you should get all the average river flows for each year.
Same thing....this one will give you peak flows for each gauging station.
Helpful hint -- when you get to the page with all the stations, hit CTRL+F...this will give you a dialogue box for searching, enter the name of the station like
'durango' and it will find that station, keep hitting find next until it finds durango at animas (for example) and you can see all the flows for the animas at durango. Wink