system at the present time, according to local reports o Prior to the 

 construction of the Nine Mile Dam on the main Walla Walla River the 

 stream was reported to have also supported a good run of spring Chi- 

 nook salmon* 



There are six small unscreened irrigation diversions carry- 

 ing a total of only 2o5 c.f«s« There are only two small, temporary, 

 low rock diversion dams that in no way interfere with the passage of 

 fish. There are no sources of pollution. 



5D-(8)a, Griffin Creek .— (April 28, 1937; Burrows and TNhite- 

 leather. ) Enters the south fork 13 miles above the mouth. This is a 

 small tributary discharging about U c.f.s. It has a steep gradient, 

 lacks suitable spawning area, and is of no value to salmon. 



5D-(8)b« Burnt_Creek. — (June 13, 1935; Suomela and Shuman. ) 

 Enters the south fork about lU miles above the mouth. The stream 

 has a total length of about 10 miles, of which the lower 3.2 miles 

 were surveyed. Above this point it is a series of steep cascades, 

 and of no value to salmon. The average width of the stream was 

 about 10 feet and the discharge at the time of s\irvey was about 10 

 c.foS. Suitable spawning area was confined to the surveyed section 

 and amounted to about 13,000 square yards, or about 6o percent of the 

 surveyed portion of the stream bed. There are no dams, diversions, 

 or sources of pollution. It was reported that steelhead trout former- 

 ly entered this stream, but none do so at the present time. Burnt 

 Creek is of limited potential value to anadromous fish» 



5E« Pine Creek , 5f. Dry Creek , and $G. Mud Creek . — (April 22, 

 1937; TOiiteleather.) These are all small streams flowing into the 

 main Walla Walla River in a six^nile section above the confluence of 

 the Touchet River* They are intermittent in character, lack suitable 

 spawning areas, and are of no value to salmon or steelhead trout* 



5H. Mill Creek . — (February l5-l8, 1935 J Suomela and Burrows.) 

 Enters the Walla Walla River about 6 miles below the city of Walla 

 Walla, The stream is about 33 miles long, of which the lower 31 miles 

 below the Walla Walla water supply dam was surveyed. The average width 

 of the stream near the mouth was about 30 feet, and in the upper 

 sections about 70 feet* At the time of survey the average depth of 

 water was about 8 inches and the discharge about 20 cf.s. Suitable 

 spawning area Tvas estimated at 330,000 square yards, or about 70 

 percent of the stream bed, with the best areas being noted in the 

 6-mile section below the city of Walla Walla. Water is taken from 

 the stream by thirteen unscreened diversions. Dams are used in con- 

 nection with only eight of the diversions, and only U of these are of 

 a permanent nature. All of the dams are passable to migratory fishes 

 with the exception of the uppermost, which formed the terminus of 

 the siurvey. This dam is 12 feet high and has an ineffective fishway, 

 thus blocking the upstream passage of fish. At a point about I5 

 miles above Three Mile Bridge there is a diversion -iriiich carries two- 

 thirds of the water of Mill Creek into Yellowhawk Creek. The entire 



35 



