greatly reduced flow. The discharge just above the mouth of Antone 

 Creek was only 7^ CofoS, 



The Big Bulger Irrigation Diversion Dam is located 2 miles 

 above Antone Creek, or 16 miles above the mouth. This dam is 3 

 feet high and 18 feet long. It is a barrier to fish during low 

 water© The ditch is 10 feet wide and withdraws 30 c.f ,So 



The Hartung-Nicholson Irrigation Ditch located about l6|- 

 miles above the mouth. There is no dam in connection with this 

 diversion. The ditch is U feet wide and withdraws 75 miner's inches, 

 or less than 2 c.f.s. 



The Big Mansfield Irrigation Ditch is located about 17 miles 

 above the mouth. There is no dam in connection with this diversion. 

 The ditch is 7 feet wide and withdraws 20 c,f ,s. 



The Warfield-Burnside Irrigation Ditch is located about 17 

 miles above the mouth. There is no dam in connection with this 

 diversion. The ditch is 6 feet wide and withdraws 1^0 Miner's 

 inches, or 3o75 c,f,s. 



The Little Mansfield Irrigation Ditch is located about 171- 

 mile s above the mouth. There is no dam in connection with this 

 diversion. The ditch is 7 feet wide. and withdraws 7^ c,f«So 



The Savage Irrigation Diversion Dam is located about 18 

 miles above the mouth. This dam is 2 feet high and is a barrier to 

 fish during low water. The ditch is 7 feet wide and withdraws 

 10 cf.s. 



The Ncrth Powder River was originally an excellent salmon 

 stream. The early agricultural development of the North Powder 

 Valley has resulted in the extensive diversion of water for irri- 

 gation purposes. It was reported that during the irrigation season, 

 in late summer and fall, the discharge at the mouth of the North 

 Powder is often less thsm 5 c,f,So Under these conditions the 

 stream is of no value to salmon. More recently the construction 

 of the impassable Thief Valley Dam on the main Powder River has 

 rendered the North Powder inaccessible at all times to salmon and 

 steelhead, 



6F-(1), An thoay Fork .— (July 7, 19U2; Parkhurst.) Anthony 

 Fork enters the North Powder River approximately 11 miles above the 

 moutho It is about 12 miles long, of which the lower 2 miles were 

 surveyed. Above this point the stream extends through a narrow, 

 rocky canyon, and is of no possible value to migratory fish because 

 of t he steep gradient. The stream had an average width of 2U feet 

 in the section surveyed, and was discharging about 30 c,f,s. The 

 water temperature was 55 F. near the mouth. The gradient is moderate 



8b 



