Table 5.— Spawning areas of coho salmon in the Columbia River Basin— past and present— Continued 



Num- 

 ber 1 



Length 



Distance 

 above 

 mouth^ 



Spawning areas 



Present 



Past 



Notes 



References' 



I9J. Calapooya 115 



River 



19K. Marys River 



19L. 



19i\I. 



McKenzie 

 River 



Middle Fork 



Willamette 



River 



I9MI. Hills Creek 



19M2 



20. 



Fall Creek 



19M2A. Little Fall Creek 



19M2B. Winberry 

 Creek 



I9N. Coast Fork 



Willamette 

 River 



W^ashougal 

 River 



Sandy River 



Hamilton 

 Creek 



64 



138 



123 



48 



29 

 13 



80 



58 



192 



282 



230 



Creeks and tribu- 

 taries, lower ?S of 

 Crabtree Cr. 



Probably West Fork Species introduced. 

 Brush Cr. 



Sections in Rock, 

 Woods, Blakcsley, 

 and Mulkey Creeks. 



Mohawk R. and 

 Camp Cr. 



Species introduced. 



Species introduced. 



Middle Sandy R. Salmon and Bull 



and Cedar Cr. Run Rivers. 



Lower part, and Same as present. 



Grccnicaf Cr. 



Water sluggish in lower part; salmon 29, 40 

 must proceed to upper portion to spawn. 



Hatchery plants established runs where 29. 40, {*) 

 none were present before. Low flows in 

 summer limit use of lower stream, but 

 ideal spawning gravel in part used. 



Apparently small runs existed before 29. 40, (*) 

 1955. Supplemented by hatchery re- 

 leases since 1959; runs probably larger 

 now. but stream not believed to be fully 

 utilized. 



Used as passageway and possible rearing 

 area. 



None native to stream nor have any been 

 introduced. 



Releases of juvenile coho salmon were 

 made in 7 tributaries in 1959 and 4 

 in 1966. Fry were seen in the 4 streams 

 in spring of 1969, the offspring from 

 natural spawning. 



Salmon fry were seen in West Fork 

 Brush Creek, but species unidentified. 

 Could be progeny of transplants. 



The listed tributaries were first stocked 

 with yearling coho salmon in 1959 and 

 1966. Some fry were observed in each 

 of the tributaries as a result of natural 

 spawning. Too early to state if runs 

 are established. 



Species unknown before transplants were 

 made in recent years. Camp Cr. has 

 excellent gravel in section 6-1 1 km. 

 above mouth. Mohawk R. has good 

 to excellent quantities of gravel that 

 appear suitable for spawning. It is 

 unknown whether runs will be firmly 

 established. 



Used as passageway. 



29. 40 

 29. 40 

 29. 40. (*) 



29, 40. (*) 



29, 40, (*) 



29, 40, (*) 

 29. 40 



A run is apparently established from 29, 40. (*) 

 stocking. Only the lower pan is avail- 

 able. 



Coho salmon said to have spawned here 29, 40, (*) 

 many years ago appear to have been 

 misidentified for spring chinook salmon. 



Same comment on Fall Cr. applies here. 29, 40, (*) 

 .A, falls blocks migration 19 km. up. 



First-generation 

 spawn. 



adults returned to 29, 40, (*) 



Fry were seen, probable results of spawn- 

 ing adults that returned from trans- 

 plants. 



Salmon Falls, laddered In 1956, opened 

 several kilometers for spawning and 

 allowed access to Washougal Hatchery 

 (W.D.F.) 8 km. above falls. Hatchery 

 rears variable part of run annually; 

 rest spawn in stream below. Large run. 



Marmot Dam. 43 km. above the mouth, 

 even though equipped with fish way, 

 causes difficulties in maintenance of 

 runs. Hatchery operated by O.F.C. 

 on Cedar Cr., rears coho salmon and 

 other species. I'nknown percentage of 

 run uses stream above and below for 

 spawning. Dam on Bull Run R. re- 

 sponsible for loss of run. Marmot Dam 

 and diversion created low flows un- 

 favorable for passage into upper river 

 and tributaries. 



Small run, spawning area limited. 



29, 40 



29 



29 



Sco footnotes at end of table. 



17 



