The first ijiajor obstruction is a planer mill dam in the town of 

 Silverton^^ approximately 3? miles upstream. This dam is 12 feet high, 

 and during the sunmier diverts the major part of the stream flow. It 

 is equipped with an inadequate fish ladder, which was dry and debris 

 plugged at the time of observation. 



A concrete dam 5 feet high is located I/4 mile farther upstream. 

 This dam is provided with tviro fish ladders. 



A low log dam 100 j'ards farther upstream is used to provide a 

 swimming pool, and is a barrier at lov/ water. 



The remains of an old v/coden dam 125 yards farther upstream were 

 a barrier -t low water. 



An unused dam and fish ladder 200 yards farther upstream is 

 passable to fish. 



In the next two milss there are tv;o low falls, one of v;hich is 

 6 feet high and impassable at low water. 



There are high falls on both forks of the stream, the one on 

 the South Fork being l/f6 feet high and that on the North Fork 184 

 feet high. 



There is sufficient area available up to the Silverton Dam for 

 about 500 salmon, -fc the next two miles up to Izaak Walton Park there 

 is spavming area available only at high water for about 6OO salmon. 

 Tl-iere is little suitable spawning area above this point. 



There were no reports of salmon in Silver Creek, and the stream 

 is of little possible value to migratory fish. 



25F-(l)h. I^rift Creek.— (September 30, 1940 5 Farkhurst and 

 Bryant.) Enters Pudding River about 40 miles above the mouth. The 

 stream is about 15 miles long,, of wtiich only the lower mile contains 

 sufficient spawning area to warrant a detailed survey. It was 15-30 

 feet wide and discharging 5f c.foSo 



About 1 mile above the mouth there is a 2-foot high diversion 

 dam which diverts most of the flow during low water stages. 



There is sufficient sj^awning area in the lower mile below the 

 diversion dam for about 300 salmon. Above this point there is little 

 suitable spawning area. 



The North Pork enters about 8 miles above the mouth, and is 

 blocked to migratory fish by a 35~foot high falls about 1-1 miles above 

 the confluence with Drift Creek. 



40 



