B 18.6 SILVER HORN CREEK (Lake Beverley) 



LOCATION: 59° if 0' 30" N. 158° 56' 12" W. 



PREVIOUS NAMES OR NUMBERS: 



U.S.G.S. MAP: Dillingham, Alaska, 1:250,000, I95I 



PHYSICAL DESCRIPTION 



TOTAL LENGTH: k.O miles 



LENGTH ACCESSIBLE TO SAI240N: J+.O miles 



AVERAGE WIDTH: 35* below forks RANGE: 25'-i4-0' 



AVERAGE DEPTH: 24" RANGE: id" -h8'' below forks 



TOTAL ACCESSIBLE SPAWNING AREA: 16.97 acres 



POTENTIAL SPAWl^ING AREA: 85^; 14.42 acres 



BOTTOM QUALITY: 50^ gravel, 305^ rubble, 10^ rock, 10^ sane" 



WATERSHED: l4 square miles. Drains a long movmtain valley (west branch) 

 and ice fields from Mt. Ai^uluktok (south branch). No obstructions. 



GRADIENT: 



WATER VELOCITY: Average =3-0 fps. 



Range - 2.7-3.4 :?ps. 



FLOW: 142.1 cf.s.(Aug. 3, 1960). High RANGE: 



water level. Flow station one-foiurth 

 mile upstream from mouth. 



AIR TEMPERATURE: 10.1° C. (Aug. 3, I960) 



WATER TEMPERATURE: 6.4° C. (Aug. 3, I960) 



POOLS AND RIFFLES: Nxmerous pools of temporary nature. 



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