llB 



I 2B3.9 TOMMY RIVER ( Iliamna lake) 



LOCATION: 39°3^'3h" N. 15i^ "3^+ ' 5^ " W. 



PREVIOUS NAMES OR NUMBERS: Dl 

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



PHYSICAL DESCRIPTION 

 TOTAL LENGTH: 13-8 miles 

 LENGTH ACCESSIBLE TO SALMON: 13-8 miles 



AVERAGE WIDTH: 20' RANGE: 15 '-35' 



AVERAGE DEPTH: 12" RANGE: 9"-30" 



TOTAL ACCESSIBLE SPAWNING AREA: l62,l40 sgmre yards (33-5 acres) 

 POTENTIAL SPAWNING AREA: 60^, 97,28i+ square yards (20.1 acres) 



BOTTOM QUALITY: l8^ <l/8", kOf^ l/8"-3", 36^ 3"-12", 6^>12". Good spawning 

 gravel in lower 5 miles, bottom coarse above 5 miles, fairly stable. 



WATERSHED: 20 square miles. Lower 2 miles atiroad flat covered with cotton- 

 wood, above this a steep, stream-cut canyon. Source: a few small lakes and 

 surface runoff. 



GRADIENT: 108'/niile 



WATER VELOCITY: 2.0 fps 



FLOW: 32 cfs (Aug. 20, I962). Measured RANGE: 

 above outlet slough, normal stiraraer 

 flow. 



AIR TEMPERATURE: 20.0° C (Aug. 20, I962) 



WATER TEMPERATURE: 13-5° C. (Aug. 20, I962) 



POOIS AND RIFFLES: 



