112-30 KWAIN CREEK K 110 
ING SO Seren Wilesilen 221 Previous No. 109 
KETCHIKAN, REVILLAGIGEDO CHANNEL, KWAIN BAY, S.W. corner 
MAJOR SPECIES Pink OTHER SPECIES Chum 
ESCAPEMENT TIMING Late. Sep. -Oct. ESCAPEMENT MAGNITUDE 25-50, 000 
SPAWNING FACILITIES Excellent intertidal spawning facilities. Upstream spawning limited to very short 
section above broad intertidal gravel flats by barrier falls. Past escapements observed indicate that stream 
accessible to salmon has unusually good spawning environment. 
STREAM TEMPERATURES Warm range (Estimated). 
VALLEY DESCRIPTION Short, steep valley heading on E. side of peak of Tamgass Mountain. Upper valley 
glacial cirque lake basin. Lower valley broad muskeg area along base of Tamgass Mountain. 
DRAINAGE 3.4 square miles (Polar Planimeter). Precipitation fed through cirque lake below mountain peak and 
a smaller lake. Small snowfield persists into July. Clear water discharge. 
STREAM MOUTH IDENTIFICATION Falls (series of minor drops) at lower intertidal outlet is narrow, 
forming an intertidal gravel basin above. 
ANCHORAGE Excellent anchorage just S.E. of stream mouth. 
TRAILS AND SURVEY ROUTES Easily surveyed on foot. 
AERIAL SURVEY NOTES Aerial visibility is excellent. Light colored gravels and clear water permit good 
salmon observations. Westerly winds drop over Tamgass Mountain and may prevent aerial survey by violent 
gusts dangerous to aircraft. 
INTERTIDAL ZONE 
LENGTH .5 mile AVERAGE WIDTH/DEPTH_ 50-100'/12" 
GRADIENT AND VELOCITIES .5° at 1-2' per second 
BOTTOM Sand and gravel, a few scattered boulders. 
LOW TIDE LOCATION Just below a series of small drops at the lower intertidal. 
HIGH TIDE LOCATION Head of the grassflats at stream emergence from woods. 
SCHOOLING AREAS A long, broad shallow pool just above the outlet of the intertidal flats. Relatively low 
current velocities allow schooling in most of the intertidal zone, including spawning areas. 
SPAWNING AREAS _ Except for the low stream velocity section in the lower third of the intertidal zone, all of 
the upper two thirds is utilized by spawning salmon. The stream course winds considerably half way up on the 
W. side of the flats where a small stream enters and provides additional spawning area. 
GENERAL NOTES 
UPSTREAM 
LENGTH ACCESSIBLE 50 yards (Estimated). AVERAGE WIDTH/DEPTH 40-50'/24" 
GRADIENT AND VELOCITIES 1° at 2! per second 
BOTTOM _ Gravel and rocks. 
MARKER DISTANCE 50 yards. 
MARKER IDENTIFICATION Barrier falls. 
BARRIERS Falls may be total barrier to salmon. 
TRIBUTARIES None below falls. 
SCHOOLING AREAS Schooled salmon have been observed throughout the entire 50 yards that are accessible. 
SPAWNING AREAS _ Over 90% of spawning occurs in the intertidal zone. Though spawning observations in the 
upstream section have been from the air only, it appears to be suitable. 
GENERAL NOTES 
ESCAPEMENT RECORD 
[Counts made by ground surveys are designated by G. Aerial surveys by A] 
SURVEYED PINK CHUM OTHER SPECIES REMARKS 
Date Miles By Live Dead Live Dead Live Adjective Rating 
1955 
Sep 19 G .1 FRI 25, 000 Chum present 
Sep 25 Care ERT 25, 000 Few dead pink 
1956 
Sep 15 G .1 FWS 1, 700 1,000 
Sep 16 G .1 FRI Few pink. 12,000 at mouth 
Sep 24 Coe ERT 50, 000 Few dead pink. Some fish at mouth 
1957 
Sep 15 Ale ERD 1, 200 Schooled, fresh 
Sep 24 A .1 FRI 1, 000 500 Some dead chum. No fish observed 
off mouth 
