Fish screens 

 are designed 

 to guide fish 

 away from 

 dam turbines. 



Installing Irdvolling 

 screens at 

 Bonneville Dam 



(Corps of Engineers) 



Fish ladders at 

 one of the 

 eight federal 

 dams salmon 

 must pass to 

 reach Idaho 

 spawning 

 grounds. 



Lower Monumen- 

 tal Dam 



(Bonneville Power 

 Adminrsrratron) 





A. 



Ratepayer-Supported Dams & Hatcheries on the Columbia River 



Backgrounder 



