N 50.7 JOE CREEK (lake Nerka) 



LOCATION: 59*35 ' 1+0 " N. 158'*5^'00" W. 



PREVIOUS NAMES OR NUMBERS: 



U.S.G.S. I-lAP: Dillingham, Alaska, 1:250,000, 1951 



PHYSICAL DESCRIPTION 

 TOTAL LENGTH: k.Q miles 

 LENGTH ACCESSIBLE TO SAIM)N: k.Q miles 



AVERAGE WIDTH: 25 7" RANGE: l8'-33' 



AVERAGE DEPTH: I3" RANGE: 3"-lB" 



TOTAL ACCESSIBLE SPAWNING AREA: I5.O acres 

 POTENTIAL SPAWNING AREA: QO^; 12.0 acres 

 BOTTOM QUALITY: 50^ gravel, 50^ rubble 

 WATERSHED: Drains mountain valley. 

 GRADIENT: 

 WATER VELOCITY: 



FLOW: RANGE: 



AIR TEMPERATURE: 

 WATER TEMPERATUEIE: 

 POOLS AND RIFFLES: Mainly composed of riffles. 



86 



