J'able 18 • Instream flow recommendations derived by the Tennant Method 

 for five reaches of the Madison, Beaverhead, Gallatin and 

 Big Hole Rivers. 



Flow Recommendations (cfs) 



Description of Flows 



Flushing or Max. 

 Optimum range 

 Outstanding 

 Excellent ' - 

 Good 



Fair or degrading 

 Poor or minimum 

 Severe Degradation 



Oct-Mar 



3,524 



1,057-1,762 



705 



529 



352 



.- . 176 



' ' 176 ' 



0-176 



Apr-Sept 



Madison (#1) 



3,524 



1,057-1,762 



1,057 



881 



705 



^ 52 9 ..■^- 



176 



0-176 





Madison (#3) 



4 



Flushing or Max. 

 Optimum range 



utstanding 



xcellent 

 Good 



Fair or degrading 

 Poor or minim\:un -• 

 Severe Degradation 



2,864 



859-1,432 



573 



4 30 



286 



• * 14 3 



143 



' 0-143 



2,864 

 859-1,432 



859 



716 



573 



4 30 



14 3 .' 

 0-143 ' 



Beaverhead (#2) 



Flushing or Max. 



Optimum range 



Outstanding 



Excellent 



Good 



Fair or degrading 



Poor or minimum 



Severe Degradation 



882 



265-441 



176 



. 132 



_-; 88 

 44 

 44 

 0-44 



882 



265-441 



265 



'^ 221 



176 



132 



44 



0-44 



Flushing or Max. 



Optimum range 



Outstanding 



Excellent .i i 



Good 



Fair or degrading 

 ^^por or minimum 

 Severe Degradation 



ft 



continued 



1,628 



488-814 



326 



244 



163 



81 



81 



0-81 



l^d 



Gallatin (#2) 



1 

 488 



,628 



-814 



488 



407 



326 



244 



81 



-81 



63 



