646 



Building a highway 

 Ion salmon 1%" ^' ^ 



One method wouW be lo bund a 350-mn« concrete-4(ned ditch that woJd stretch troin Lewistoo to 

 BonnevJie Dam at The DaJIes in Oegon. The salmon woJd be funne(«d into the ditch along wtth a water How 

 of 1 500 gallons per second CobWes wouW b* placed aJonfl the bonom ot the dich. and the top would be 

 completely covef&d wrtn a sieeJ socurity fence in placos. the drtch would have to be tunneled through 

 mountains Ponds would be strategtcaJly placed awng the way lo allow •*■- 



31 oH the freeway and rest tecnnicaJ pfoWems thai remain 

 include devising ways 

 Bonneville Dam 



Cost: $6 billion 

 to $7 billion to 

 build and $10 

 million annually 

 to maintain. 



Mosi experts agree Ihal the besi way to save Idaho's dyino salmon runs is to gel mem 

 10 Ihe Paa'ic Cfcean laster Eighi dams now block iheir 900-mile migration itom 

 Lewiston 10 the Pacific Ocean The dams create a series of slacfcwaief reservoirs iha^ 

 slow the migration of baby salmon The trip tooK a tew iweeKs before the aams were 

 built. Now tt laXes months. Most salmon die from disease and predators as a result 



Hef» ere Mine of the inetl>odt being conttdared to ip x d Iha Mimon mlgritlon: 



PIPELINE 



This concept "S similar to the drtch m that salmon would be 

 laKen out of the nvef and propeAed downstream This 

 proposal, however, has the salmon swimmirw lo the ocean m 

 a noatir>g iZ-tool^iameter plpeUrw made of Keviar. the 

 matenal m Ixjiletprool vests The pipe would float m the nver, 

 eicept m areas where <i r^eeded to be suC>merged to allow 

 boats 10 pass. Pumps would have to be installed every 1 SOO 

 feet to keep water moving through the pipeime Technical 

 proWems are ttie same as in the drtch moitvxJ — how to gel 

 It the appropriate places 



NET PEN 



This is Similar lo barging, but instead of b«if^ put in an aquanur 

 ihe fish are kepi in a large net pen that Is lowed oownslream 

 Knotiess netting (top. bottom Tug 



ar>d (our skJes) 



Cost: $21 million to build and $6 million 

 annually to maintain 



J Corp* ol EnQVMWi PvVtrc O^tnci n*s*vtf> * 



This is the method currently used to get salmon 

 around the dams and downstream The fish are pumped 

 1/4-mile through the Lower Granite Dam and poured into 

 an aquanum on a barge or put into a lanker truck Some 

 studies indicate that the process traumatizes the tish, 

 weakens their immune systems and makes them 

 more Susceptible to disease. Opponents of the 

 method say that If it wortted the salmon 

 wouldn't be on the bnnk of eitinclion 



Cost: $1.9 million annually 



This Is experimental technology 

 being considered by federal officials 

 It would use sound to guide the 

 salmon through reservoirs to 

 fish-bypass facilities The technology 

 has t»en successfully used on the 

 East Coast to keep fish away from 

 dams, ar>d tests have shown it also 

 can attract fish. But the technology is 

 still experimental, corps officials said 



Cost: unknown 



Son>c waves 



used lo anract 



Emaittobypan 



