National Geographic, Volume 199National Geographic Society., 2001 - Geography |
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Page 26
... dams on the lower Snake in the 1960s and ' 70s that wild salmon and steelhead runs on the river plummeted , falling from an average of about 130,000 annually in the late 1960s to about 15,000 in the late ' 90s . Those numbers doubled to ...
... dams on the lower Snake in the 1960s and ' 70s that wild salmon and steelhead runs on the river plummeted , falling from an average of about 130,000 annually in the late 1960s to about 15,000 in the late ' 90s . Those numbers doubled to ...
Page 31
... dams at a time of growing power shortages in California , which receives electricity generated in the Columbia River Basin . Those who would dismantle the dams con- tend that a free - flowing lower Snake , while eliminating barge ...
... dams at a time of growing power shortages in California , which receives electricity generated in the Columbia River Basin . Those who would dismantle the dams con- tend that a free - flowing lower Snake , while eliminating barge ...
Page 33
... dams to save salmon runs . problem at least three more years . They say they will continue trying to make the engineered river more hospitable to fish before recom- mending to Congress whether the four Snake dams should be breached ...
... dams to save salmon runs . problem at least three more years . They say they will continue trying to make the engineered river more hospitable to fish before recom- mending to Congress whether the four Snake dams should be breached ...
Contents
Indonesia74 | 74 |
FEATURES DEPARTMENTS | 2 |
The Clearing Deep in the Congo a sunny glade attracts gorillas Behind the Scenes | 38 |
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adverse events adverse reactions Akhenaten Amarna American ancient animals Arizona atorvastatin Avandia balance transfers Bartram Black Sea cats cave CELEBREX celecoxib CESAR China clinical trials Columbia corticosteroids dams Director disease Djenné drug erectile dysfunction explorer feet fexofenadine fexofenadine hydrochloride fish FLONASE FLONASE Nasal Spray flower forest frogs gorillas Grand Gypsies Harlem human island jaguar Kublai land lansoprazole lions LIPITOR live liver male MAPS Marco MasterCard medicines Megatransect mg/kg/day miles million minkes Motor mountains National Geographic Channel National Geographic Society nationalgeographic.com Nefertiti North NSAIDs Ocean oral doses Pacific pain Palmyra patients percent PHOTOGRAPHS placebo planet Polos population President PREVACID prize pterosaurs renal reported River salmon says ship side effects Snake species studies Sweepstakes Sylvia Earle symptoms therapy tion tomb ulcer VIAGRA VIOXX WEBSITE Welsh whale wildlife William winner