h5 



I 92.6 YOUNG'S CREEK ( Uianma Lake) 



LOCATION: 59%7'^2" N. 154°27'00" W. 



PREVIOUS NAMES OR NUMBERS: F6 



U.S.G.S. MAP: Iliamna, 1:250,000 



PHYSICAL DESCRIPTION 



TOTAL LENGTH: 12.5 miles 



LENGTH ACCESSIBLE TO SAmON: 12.5 miles 



AVERAGE WIDTH: kO' RANGE: 25 '-60' 



AVERAGE DEPTH: 12" RANGE: 8"-30" 



TOTAL ACCESSIBLE SPAWNING AREA: 293,304 square yards (60.6 acres) 



POTENTIAL SPAWNING AREA: hofo, 117,128 square yards (2Jj-.2 acres) 



BOTTOM QUALITY: 2f> <l/8" , 1% l/8"-3", 2l/o 3"-12", 2^o >12". Good gravel 

 from 1.2 to' i+ miles, bottom coarse beyond k miles. Left fork nonspawn- 

 able due to rubble bottom. Bottom stable above 1.2 miles. 



WATERSHED: 35 square miles. A glacial valley. Lower mile of stream meanders 

 through 9 mile long marshy lake. Creek forks h miles above mouth. Dense 

 willow br\ish along stream. Thin spruce forest on high groxind. Soiirce: 

 mainly surface runoff. 



GRADIENT: 52 '/mile 



WATER VELOCITY: k.O fps 



FLOW: 76 cfs (Aug. 30, I961). Measured RANGE: 

 1.5 miles from mouth, normal summer 

 flow. 



AIR TEMPERATURE: 13.0° C. (Aug. 30, I96I) 



WATER TEMPERATURE: 9.0° C. (Aug. 30, I961) 



POOLS AND RIFFLES: 



