99 



I 156.8:11.0 ILIAMM RIVER - LEFT FORK ( Iliamna River) 



LOCATION: 59*^ '00" N. 153'^8'30" W. 



PREVIOUS NAMES OR NUMBERS: None 



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



PHYSICAL DESCRIPTION 



TOTAL LENGTH: I8.O miles 



LENGTH ACCESSIBLE TO SALMON: I8.O miles 



AVERAGE WIDTH: 75' RAI^GE: 60'-100' 



AVERAGE DEPTH: 2^4-" RANGE: l8"-30" 



TOTAL ACCESSIBLE SPAWNING AREA: 792,308 square yards (163.7 acres) 



POTENTIAL SPAWNING AREA: 37^, 293, 30U square yards (6O.6 acres) 



BOTTOM QUALITY: kOfjo <l/8", 26^ l/8"-3", 23^ 3"-12", 11^ >12". Fair 



spawning gravel in lower part interspersed with rock and bo\ilder, not 

 well known above 6 miles. Bottom fairly stable. 



WATERSHED: A glacial valley heavily forested with spruce, birch, and cotton- 

 wood. Subject to occasional severe flooding. Soiurce: mainly siorface 

 r\inoff . 



GRADIENT: kl'/n^le 



WATER VELOCITY: U.O fps 



FLOW: kQO cfs (Sept. k, I962). Measured RANGE: 

 ji:ist above forks, water level receding. 



AIR TEMPERATURE: 19.0° C. (Sept. k, I962) 



WATER TEMPERATURE: 12.5° C. (Sept. k, I962) 



POOLS AND RIFFLES: 



