quite open andp like the main Santiam, is subject to high temperatures 

 in the sunmer and fall months. Hovrever, the water temi^eratures are 

 not as critical as in the main Santiarn, and the spavming areas are 

 utilized to some extent, particularly in the upper 10 miles of this 

 sectiono 



In the next 31 miles to the confluence of the Breitenbush River 

 the gradient is moderate (17.5-31.3 feet per mile). In this section 

 the stream is much narrcnirer as it passes through the confines of a 

 ieepj, rocky gorge. 



The remainder of the stream has a much steeper gradient (59-62 

 feet per mile). 



The Jefferson Ditch is located just above Green's bridge, 3 

 miles above the mouth. The Sidney Ditch is located about 9 miles 

 above the mouth, and carries 8 c.f.s., for irrigation purposes. 

 Neither of these diversions, taking off from side channels, have dams 

 that would obstruct fish, but neither of them are screened to prevent 

 the loss of fingerlings. 



The first obstacles to the upstream migration of fish are in the 

 vicinity of Stayton, where the river is divided into a maze of channels. 



During low v^ater periods the upper Gardiner Dam on the south 

 channel diverts practically the entire flov/- dovm the North Channel o This 

 dam, formerly impassable to fish, was provided v^-ith a fishway in 19A7. 

 In the North Channel, about ij miles below the upper Gardiner Dam, a 

 wing dam extending nearly two-thirds of the distance across the channel 

 diverts most of the flow into the unscreened Salem Ditch, which empties 

 into Mill Creek (see latter, 25 N.) The remainder of the flov/ in the 

 North Channel is diverted a short distance below by the lower Gardiner 

 Dam into the Gardiner Ditch leading to the Stayton povrer canal. Water 

 is taken from the latter canal in the town of Stayton for the Paris 

 Woolen Mill powerhouse, the Gardner Feed Mill, the Stajrbon Water Com- 

 pany P\imping Plant, the Mountain States Power Company powerhouse, and 

 a wool batt factory. Vifater is collected below these diversions by the 

 Stayton 7ifasteway, from which the West Stayton Ditch diverts up to 80 

 Cof.s., for irrigation. The latter ditch was provided with a broken- 

 down fish screen. The remaining flow in the Stayton Wasteway empties 

 into the North Santiarn nearly 1 mile below Stayton. As during lov/ water 

 periods the flow in the Stayton Wasteway return is greater than that in 

 the main river the majority of migrating adult salmon are attracted in- 

 to the wasteway. A fish ladder at the Mountain States Pov;3i^ Plant is 

 the only way by which these fish can pass from the wastevray into the 

 power canal and thus to the upper river. On several inspection trips 

 this ladder was found to be dry and obstructing the passage of spring 

 Chinook salmon congregated below. Most of the diversions ai'e inadequate- 

 ly screened. 



49 



