101-51 HIDDEN CREEK K 6 
N55°01.6 W130°19 Previous No. 4 
KETCHIKAN, PORTLAND CANAL, Hidden Inlet, head 
MAJOR SPECIES Pink and chum OTHER SPECIES Coho, trout 
ESCAPEMENT TIMING Early. July-Aug. ESCAPEMENT MAGNITUDE _ »>20,000 
SPAWNING FACILITIES Excellent for three miles. 
STREAM TEMPERATURES Coldrange. 41°F., 7/23/49; 49°F., 7/25/50; 50°F., 9/10/50. 
VALLEY DESCRIPTION Glacial. A broad delta and lower valley about . 3 miles across show stream bed changes 
for the first mile of stream. Two valleys join at the forks 1.8 miles upstream. The W. valley rises rapidly. The 
E. valley continues gently for several miles before becoming steeper. 
DRAINAGE Snowfields and small high lakes are scattered throughout the system. Most of the snowfields are gone 
by Aug. and precipitation is the main source in Sep. The upper ridges are barren rock. The stream bed shows 
evidence of wide fluctuations in discharge. 
STREAM MOUTH IDENTIFICATION A broad delta at the head of Hidden Inlet with the stream crossing the 
N.W. side through grassy flats. 
ANCHORAGE Off the N.W. shore .7 miles from the tree line on the delta. 
TRAILS AND SURVEY ROUTES Dnring normal water, the stream bed is easily walked. 
AERIAL SURVEY NOTES Few aerial surveys have been made here, but the valley and light colored gravels 
in the stream are excellent for surveys by light plane. 
INTERTIDAL ZONE 
LENGTH .6 miles AVERAGE WIDTH/DEPTH  80!/24" 
GRADIENT AND VELOCITIES Less than 1° at 2! per second 
BOTTOM Small gravels, sand extensive in lower stream. 
LOW TIDE LOCATION No distinguishing mark. 
HIGH TIDE LOCATION At stream entry into woods. A log jam is usually found a short distance inside of 
woods and is about the high tide point. 
SCHOOLING AREAS Several pools in upper intertidal area. 
SPAWNING AREAS ll riffles from half tide upstream. Clean gravel. 
GENERAL NOTES 
UPSTREAM 
LENGTH ACCESSIBLE Over 3 miles AVERAGE WIDTH/DEPTH  60'/24" 
GRADIENT AND VELOCITIES Less than 1° at 2' per second 
BOTTOM Clean gravel, water rounded. Gravel ranges from 2" to 5" in lower stream. 
MARKER DISTANCE 1nmile. 
MARKER IDENTIFICATION A large boulder in the stream at the lower end of a long curved part of the 
stream with rocks and boulders not found downstream. 
BARRIERS None in 3 miles. 
TRIBUTARIES The stream forks 1.8 miles upstream. The W. fork rises rapidly through coarse gravels and rocks 
with limited spawning facilities. The main fork continues up the E. valley. 
SCHOOLING AREAS Scattered pools occur throughout the stream. No major schooling pool observed. 
SPAWNING AREAS The greatest number of salmon have been within the first mile. However, facilities are 
excellent for 3 miles. 
GENERAL NOTES 
