Chinook pass to the large deep^ and cooler resting pools in the middle 

 section. The spring chinooks remain in these resting pooifa from July- 

 through early September., and then move on to the spaiming riffles in 

 the middle and upper sections of the stream. This movement usually oc- 

 curs after the first fall rains, and it is important that the numerous 

 low water barriers be improved to facilitate fish passage at this seasono 

 There are extensive spavming areas in the preferred middle and upper 

 sections of the river sufficient to accommodate at least 5<,000 salmon. 

 In the year 194-0 a total of 882 spring Chinook spawners was counted^, 

 and more were present. In the year 1941 a total of 993 wa.3 counted,, 

 and in addition an unknown number entered the South Fork. Details of 

 the spawning area utilization are given by Rich (194B) in the introduc- 

 tion to this report series. A few silver salmon and a good run of 

 steelhead Lrout also enter the river. 



The Molalla has proved value for salmon, and aided by stream im- 

 provements and protection it should become even more important from this 

 standpoint. The remarader of the stream and the unsurveyed portion 

 should be examined in detail at spawning time* 



25F-{1)« Pudding River .— (September 6, 1940| Parkhurst and Bryant «) 

 Enters the Molalla 1 mile above the nouth. The stream is about 55 miles 

 long. The stream course meanders entirely on the Vfillamette Valley floor, 

 and at no place does the gradient exceed 5 feet per mile. This sluggish 

 mud bottom stream is of value to salmon and trout mainly as a passageway 

 to several of its tributaries. The discharge over a 17 year period 

 ranged from 37 to 13.,)800 c.foS.„ but during the summer the flow is gen- 

 erally 50-75 c.foS. 



A mill dam 4 feet high near the village of Pratum in tne extreme 

 upper section of the stream is a barrier at low water. 



The Pudding River is one of the most badly polluted streams ever ob- 

 served by the survey party. Garbage and fruit cannery wastes in the 

 vicinity of Y/oodb-orn and Kubbard^ Oregon had so badly contam.inated the 

 water with an oily emulsion that large numbers of suckers, chubs,, lam- 

 preys, catfish and even crayfish were found dead. It is believed that 

 only spring run fish that ascend to the tributaries during spring high 

 water stages can exist in this stream system until the pollution has 

 been eliminated. 



25F-(l)a. Mill Creek.— 



25F-(l)b. Rock Creek .— 'These are small streams of nc possible value 

 to salmon. 



25F™(l)c. Bubte_Creek,™( Inspected September 20, 1940 5 Parkhurst 

 and Bryant.) Enters Pudding River about I5 miles above the mouth, and 

 is 32 miles long. The recorded discharge ranges from 5 to 4;>410 c.f.3.„ 

 but the average flow from July through October generally averages less 

 than 20 c.f.s. 



38 



