The water control dam at the outlet of Little Fayette Lake 

 is 15 feet high, and is impassable to fish. 



None of these dams or diversions were equipped with any fish- 

 protective devices* 



A run of blueback salmon formerly entered Little Payette Lake, 

 It was reported that the lake now supports a population of the land- 

 locked form of the same specieso Lake Fork Creek is completely inacces- 

 ible to salmon , and is of little potential value because during the 

 irrigation season 90 percent of the flow is diverted for agricultural 

 use* 



3G-(ii)a, North Fork, Lake Fork Creek « — (August lU, 1938j Hanavan,) 

 The North Fork enters the upper end of Little Payette Lake, The stream 

 is about lU miles long. An impassable power dam 20 feet in height is 

 located 2 miles above the lake. The diversion of 20 c,f,s, was being 

 carried to the power plant one mile below, where it was returned to the 

 stream. There were no fish-protective devices. The stream bed from 

 the dam to the power plant is practically dry at low-water stages. The 

 North Fork is completely inaccessible, and of no present value to 

 salmon, 



3H. South Fork, Payette River , — (August 21-25, 1938; Hanavan, 

 Parkhturst, Wilding, and Mortono) ^e South Fork enters the Payette 

 River approximately 72 miles above the mouth. The stream is about 

 77 miles long, of which 73 miles were s\u:veyed. Near the mouth it was 

 about 100 feet wide, Gaging«station records taken at a station 1 mile 

 above the mouth (U.S.G.S., 1939) show a discharge of 1200 cfoS, at the 

 time of the survey. The discharge of the lower South Fork is partly 

 controlled by the operation of a dam on the Deadwood River. The water 

 temperatiu'e ranged from 69,0 F. at the mouth to 5U,0 F, at the terminus 

 of the survey. The gradient is mostly moderate, but is fairly steep in 

 some places. There is a concentration of good spawning area for a dis- 

 tance of 7 miles above the confluence of the Middle Fork, This portion 

 of the stream provided the principal Chinook salmon spawning area in 

 the South Fork before the run was blocked by dams in the main Payette, 

 There were 1|10,000 square yards of suitable spa?ming area, constituting 

 approximately 11 percent of the total bottom in the portion surveyed; 

 200,000 square yards or approximately h9 percent of the spawning area, 

 was found in the lower 16 miles, below the impassable Grimes Pass power 

 dan. 



The Grimes Pass power dam, located about l6 miles above the 

 mouth, was 60 feet high and was not provided with any mesins for the 

 passage of fish, ■^he middle third of this structure was washed out 

 on July 7, 19U3» It was reported that reconstruction was intended. 



There is a series of natviral falls about 25 miles above the 

 mouth. One of these is about l5 feet high, and it was reported that 

 iriien salmon were formerly able to enter the South Fork they did not 

 ascend above this point. 



56 



