the survey. Near the mouth the stream was about 50 feet yride, dis- 

 charging about 150 c.f.s,, and the water temperature was 58.0 F, The 

 volume of flow diminished rapidly upstream. The gradient is moderate 

 throughout the portion surveyed. There were 120,000 sq. yd, of 

 suitable spawning area, constituting 55 percent of "the total bottom 

 in the portion siirveyed. Numerous small irrigation ditches were 

 found throughout* None of these diversions were equipped with fish 

 screens. The total amount of water being diverted was considerable, 

 and in several places the stream bed was practically dry. There 

 was sons silting of the stream bed. This was due mainly to returns 

 from irrigation ditches and partly to placer mining on several small 

 tributaries. The Pahsimeroi River formerly supported a good run of 

 Chinook salmon and steelhead trout. Eggs were taken from Chinook 

 salmon spawners in this stream and removed to the U. S. Fisheries 

 Station at Salmon, Idaho during the years 1?23 through 1927. Some 

 fingerlings were liberated in the Pahsimeroi River, but the run has 

 declined steadily. The stream is of little present or potential 

 value as a salmon producer, due mainly to the extensive withdrawal 

 of water for agricultural piirposes, 



IH, 3ast Fork, Salmon River , — (Not surveyed) The East Fork 

 enters the S?lmon River 5 miles below Clayton, Idaho, or approximately 

 336 miles above the mouth. The stream is about 32 miles long. It 

 was reported to support a small run of chinook salmon, 



II, Yankee Fork, Salmon River , — (June 19, I9UI} Frey and Bryant,) 

 The Yankee Fork enters the Salmon River 12 miles below Stanley, Idaho, or 

 approximately 36O miles above the mouth. The stream is about 25 miles 

 long. The discharge was Uh5 c.f,s, (U.S .G.S,, 19^42) . The Yankee Fork 

 was extremely muddy at the time of observation, due to the extensive 

 operations of a large gold-<sining dredge. Although a few chinook 

 salmon were reported to enter the stream, it was considered of little 

 value as long as dredging continues because of excessive silting of 

 the stream bed» 



IJ. Valley Creek , — (July U, 19bl; Frey and Bryant,) Valley 

 Creek enters the Salmon River at Stanley, Idaho, approximately 372 

 miles above the mouth. The stream is about 21 miles long. The dis- 

 charge was 232 cf.s, (U.S.G,S., 19U2), Valley Creek was very muddy 

 at the time of observation, due to a gold dredging operation in the 

 headwaters. The stream was reported to support a small run of chinook 

 salmon, 



UC, Redfish Lake Creek ,— (July 20, 19lil, and Oct, 8, 19U2j 

 Bryant,) Redfish Lake Creek enters the Sal-T^-on River 5 miles above 

 Stajiley, Idaho, or approximately 377 miles above the mouth. The 

 stream extends for 3A ^le to Little Redfish Lake, which is almost 

 circular and 1/2 mile in diameter. From the upper end of Little 

 Redfish Lake it extends for 1^ miles to Big Redfish Lake, Big Red- 

 fish Lake is about h miles long. The stream is impassable to salmon 

 a short -distance above the head of Big Redfish Lake because of falls 



28 



