:13-13 DISAPPEARANCE CREEK K 150 



SS-Og' N. ISa'lS.S' W. Previous No. 134 



KETCHIKAN, CLARENCE STRAIT, CHOLMONDELEY SOUND, SOUTH ARM, S. E. head 



MAJOR SPECIES Chum OTHER SPECIES ^^"^ 



ESCAPEMENT TIMING Late. Sept. -Oct. ESCAPEMENT MAGNITUDE 



SPAWNING FACILITIES Fair in the intertidol zone. Poor in the area between the high tide mark and the 



spring ponds and good in the spring ponds. 

 STREAM TEMPERATURES Cold range (45. 5* F. , 9/30/49; 45->45°. F. , 1950; 46° F. , 9/21,51, 46* F. , 



9/28/51; 47* F. , 10/5/52; 46* F. , 9/18/53). 

 VALLEY DESCRIPTION Stxeam-cut. A heavily wooded valley with an abundance of underbrush. 

 DRAINAGE 3 square miles (polar planimeter). Precipitation fed. Snowfields E. and W. of the valley along 



with ground water from the spring ponds are the water source. 

 STREAM MOUTH IDENTIFICATION The stream enters the S. E. corner of the South Arm. There is a small 



grass flat on the W. side of the stream. 

 ANCHORAGE Good anchorage is found at the head of the South Arm. Favor either side of the charmel 



until >1 mile into the bay and then keep to midchannel. Anchor S. of the small island. 

 TRAILS AND SURVEY ROUTES Waded without much difficulty. Banks have thick brush, making 



hiking difficult. An A. D. F. GG. trail follows the left bank to the stream source. 

 AERIAL SURVEY NOTES Fly up to the lake and make a 180* turn, crossing over and back continu- 

 ously on the way downstream in order to count. 

 GENERAL NOTES This stream has large escapements at times. Large numbers of black bear frequent 



the stream.. Permanent weir cabin was installed by the A. D. F. & G. in 1961. 



INTERTIDAL ZONE 



LENGTH 0.75 mile AVERAGE WIDTH/DEPTH 30' -40'/ 10" -20" 



GRADIENT AND VELOCITIES Moderate 



BOTTOM Gravel in between large rocks. 



LOW TIDE LOCATION 



HIGH TIDE LOCATION 



SCHOOLING AREAS The fish generally school off the mouth, below the low tide mark. 



SPAWNING AREAS Chum and a few pink spawn throughout this zone. The bottom composition is 



rather coarse. 

 GENERAL NOTES A series of rapids extends almost down to the high tide mark. 



UPSTREAM 



LENGTH ACCESSIBLE 0. 75 mile AVERAGE WIDTH/ DEPTH 15'-40V8"-10" 



GRADIENT AND VELOCITIES Moderate to swift 



BOTTOM Small rock, shale, boulders and bedrock. 



MARKER DISTANCE 



MARKER IDENTIFICATION 



BARRIERS None 



TRIBUTARIES The stream branches and rejoins just above the intertidol zone. 



SCHOOLING AREAS Small pools throughout the stream are utilized for schooling, but schooling is 



generally heaviest in the spring ponds. 

 SPAWNING AREAS Fish spawn throughout the stream. The major area is the spring ponds which have 



a bottom composition of excellent spawning gravel. 

 GENERAL NOTES 



