172 

 G 0.0: 0. 5 L LITTLE GIBRALTAR CREEK (Gibraltar Creek) 



LOCATION: 59°23'2J|" N. 154°57'12" W. 



PREVIOUS NAMES OR NUMBERS: None 



U.S.G.S. MAP: Iliarana B-5, 1:63, 36O 



PHYSICAL DESCRIPTION 



TOTAL LENGTH: II1.9 miles 



LENGTH ACCESSIBLE TO SAmON: IU.9 miles 



AVERAGE WIDTH: 10' RANGE: 6 '-20' 



AVERAGE DEPTH: I8" RANGE: 



TOTAL ACCESSIBLE SPAWNING AREA: 87,60l+ square yards (18.I acres) 



POTEOTIAL SPAWNING AREA: k^^,, 39,204 square yards (8.1 acres) 



BOTTOM QUALITY: 23^ <l/8", 285^ l/8"-3", 32fo 3"-12", 17^ >12". Good gravel 

 in lower mile, not well known above 1 mile. Bottom fairly stable. 



WATERSHED: 65 square miles. A shallow stream-cut valley thro\;igh open roll- 

 ing hills, willow thickets near mouth, tundra in upper part. Subject to 

 occasional flood. Source: several small lakes and marshes. 



GRADIENT: IOI+ '/mile 



WATER VELOCITY: 2.0 fps 



FLOW: 20 cfs (Aug. 6, I962). Meas\ired RANGE: 



just above mouth, normal summer 

 flow. 



AIR TEI-IPERATURE: 22.0** C. (Aug. 6, I962) 



WATER TEl'IPERATb'RE: 11.0° C. (Aug. 6, I962) 



P00I£ AND RIFFLES: 



