181^ 

 C 0.0 NEWHALEN RIVER (Lake Clark) 



LOCATION: 59%1'43" N 15U°52'52" W. 



PREVIOUS NAMES OR NUMBERS: HI 



U.S.G.S. MAP: Iliamna, 1:250,000; Lake Clark, 1:250,000 



PHYSICAL DESCRIPTION 



TOTAL LENGTH: 25-0 miles 



LENGTH ACCESSIBLE TO SAmON: 25-0 miles 



AVERAGE WIDTH: 250' RANGE: l80'-500' 



AVERAGE DEPTH: 12' RANGE: 



TOTAL ACCESSIBLE SPAWNING AREA: 3,667,268 square yards (757-7 acres) 



POTENTIAL SPAWNING AREA: kO^, 1,1+67,000 square yards (303-1 acres) 



BOTTOM QUALITY: 



WATERSHED: 3,700 square miles. A broad glacial valley between Iliamna 



lake and lake Clark. Surro-unding terrain sparsely forested with spruce 

 and birch. Three rapids in lower river present partial block at most 

 water levels. Source: Six- Mile lake and. lake Clark. 



GRADIENT: 7 ' /mile 



WATER VELOCITY: Approximately 2 fps 



FLOW: 8,000-11,000 cfs, mean annual RANGE: 



discharge (U.S.G.S.). 



AIR TEMPERATURE: 



WATER TEMPERATURE: 



POOLS AND RIFFLES: 



