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Coho salmon, ready to spawn, leap up a fish ladder which leads them into the hands
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of the Michigan Department of Natural Resources. Eggs are removed for the state’s
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fish hatcheries, which later return a new generation of coho to the lake's tributaries.
and agricultural activities just mentioned, as well as the dumping of toxic
dredging wastes and the discharge of hot water used for cooling in power
plants into the lake, and pollution from harbor and shipping operations.
‘With data' provided to him by the Department of Water and Sewer&
Mayor Richard Daley summarized the Chicago situation at the rst interstate
conference session, january 31, 1968:
Assault on (: Lake
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