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I 320.8 DENNIS CREEK ( Iliamna lake) 



LOCATION: 59''2l+'2Jf" N. 155''01'00" W. 



PREVIOUS NAMES OR NUMBERS; A2 



U.S.G.S. MAP: Iliamna, 1:250,000; Iliamna B-5, 1:63, 36O 



PHYSICAL DESCRIPTION 



TOTAL LENGTH: 19-3 miles 



LENGTH ACCESSIBLE TO SAmON: 19-3 miles 



AVERAGE WIDTH: 30' RANGE: 10'- 50' 



AVERAGE DEPTH: 12" RANGE: 8 "-36" 



TOTAL ACCESSIBLE SPAWNING AREA: 339,768 square yards (70.2 acres) 



POTENTIAL SPAWNING AREA: 26^, 88,572 square yards (I8.3 acres) 



BOTTOM QUALITY: 20^ l/8"-3", kCi> 3"-12", kO^ >12". Good gravel in lower 2 

 miles, much rubble and bedrock in canyon, upper part not well known. 

 Bottom stable. 



WATERSHED: k6 square miles. Creek emerges from a canyon I.5 miles long. 1 

 mile from mouth, above canyon a broad valley and open rolling hills. 

 Willow, birch, and cottonwood along stream. Source : nimieroiis lakes and 

 marshes . 



GRADIENT: 58 '/mile 



WATER VELOCITY: 2.0 fps 



FLOW: 50 cfs {July I8, I962). Meas\ared RANGE: 

 1 mile from mouth, normal stnnmer 

 flow. 



AIR TEMPERATURE: 20.0° C (July I8, I962) 



WATER TEMPERATURE: 13.5° C. (Jvily I8, I962) 



POOLS AND RIFFLES: 



