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Stefle 5/^30/95 Page 9 



Figtrs 1 - Cakaiiated survivals based on NMFS survivaJ astinnaies 



The Team cominu« to support tha devBtopnwnt of efforts on atemaiive 

 suifscs collection and bypass systems bocause they offer itw opportunity to 

 move fish past a dam VMthout creating ga« sup«rsa$urKtion problems. Given th« 

 existing cofrftguration of spiUway gatss and sdlng basins^ spifi must be rinrited to 

 reduce me impact of dissolv9d gas on eurvivals. In the futuro, reconSgured 

 spitways may (» abie to satety pa^ greater amounts of sptll than is pfoserttry 

 prudent but there must be substantial amounts of research and «ngineer1ng 

 before this will be a rsality. 



Surface ooUecdon and vertical slot buA^head gates at sp^Mweye currently 

 hold promise of increasing the portion of the tiah tha avo^d tt)e turbtfM»e v^le 

 incfsasing the numbo? of tish spiled per volume of wcter spilled. 



The Team has foflowwj devekspment in surface oriented bypassirig and 

 ootection since pubiishmg our Rnai Rec om rtioo da ti o f^ in 1 994. We are now 

 even more optimtstK t\3t preiminary prototype tests mi show tte ab0rty to 

 Increase survivai past dams. We suggest thai efforts and expendturos for testing 

 surface ooHecsion be increased, pertiaps at the cost of de-emphasizii^ other 

 altematives such as instding extended length servers at the mainstem dams. 



KJMFS should foHow ck»*ty tn« surface ooJ»ectk»i •nork by th« Corp* at 

 Ice haitnr and Lower Granite; and by the PUD's at Hocicy Reach and 

 Wanapum. 



