N 92.2 HIDDEN LAKE CREEK (Lake Nerka) 



LOCATION: 59**32'5^" N. 158*^5'U2" W. 



PREVIOUS I^IAMES OR NUMBERS: 



U.S.G.S. MAP: Dillingham, Alaska, 1:250,000, 1951 



PHYSICAL DESCRIPTION 



TOTAL LENGTH: 2 miles to upper lake; 0.6 mile to Hidden lake. 



LEiJGTH ACCESSIBLE TO SAMON: 2 miles (except sane years). 



AVERAGE WIDTH: 15' ( Below Hidden Lake RANGE: 5 '-25' 

 branch) 



AVERAGE DEPTH: 10. 5" RAInIGE: 3"-2i|" (Midstream) 



TOTAL ACCESSIBLE SPACING AREA: 3.64 acres 



POTENTIAL SPAWNING AREA: 87^; 3.I6 acres 



BOTTOM QUALITY: 70^ gravel, 30^ rubble 



WATERSHED: 6 square miles. Drains sloping tundra valley at base of Frog 



Mountains. The creek is fed by three spring ponds about one-half mile up 

 from the mouth, Hidden Lake, and two small lakes 2 miles upstream. Some 

 beaver dam obstructions in some years. 



GRADIENT: 



WATER VELOCITY: Average = 2.0 fps. 



Range = I.5-3.6 fps. 



FLOW: 27 cfs. (Aug. I8, I96O). Medim- RANGE: 



low vra.ter level. Flow station 5OO 

 feet up from mo\ith. 



AIR TEMPERATURE: 13.3° C. (A\jg. I8, I960) 



WATER TEMPERATURE: 11.7° C. (Aug. I8, I96O); l4.3* C. (Aug. 20, I962) 



POOLS AND RIFFLES: No large pools. 



9h 



