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STATE OF WASHINGTON DEPARTMENT OF FISHERIES - EXHIBIT D 

 Port Angeles Harbor wherein significant production of bi- 

 valve molluscs cannot be achieved (reference: Table VI, p. 

 30, Information Bulletin, Port Angeles, Washington, Decem- 

 ber 15, 1965, Washington Pollution Control Commission). 



Successful propagation of anadromous fish 

 in such protected areas as hatcheries, spawning channels, 

 and special rearing ponds can be negated by the loss due 

 to adverse natural environmental conditions encountered in 

 the streams and estuarial waters on their seaward migration. 



Water temperature extremes are a prime factor 

 affecting the propagation, growth and habitat of food fish 

 and shellfish. Optimal temperatures of marine and estuarial 

 waters for shellfish range between 40 F and 68 F and water 

 uses which would alter water temperatures beyond the normal 

 seasonal fluctuation should not be permitted. Optimal 

 temperature range for resident and anadromous fish in fresh 

 water is 45 F to 60 F, with a range of 45 F to 55 F during 

 spawning, incubation and hatching. Water temperature of 

 marine and estuarial waters should not be altered more than 

 5^ in the range between 40 F and 60 F. 



Dissolved oxygen content of marine and es- 

 tuarial areas for food fish and shellfish should be greater 

 than 6 mg/l throughout the year. Dissolved oxygen content 

 of fresh-water areas utilized by resident and anadromous 



