121 o Nason Creeko— (Surveyed at various times 1935-1947 j 

 Whiteleathe"?^ Shuitian, ^and members of the Grand Coulee fish main- 

 tenance project.) Enters the Wenatchee River just below Lake 

 Wenatchee. The stream is 25 miles long, of which the lower 23 

 miles were surveyed. The discharge ranges from less than 50 c.f.s. 

 during the late fall and winter months to 3,000 c.f.s. at maximum 

 flood stage. The normal midsummer flow is 100-150 c.f»s. The 

 gradient is slight to moderate in the lower half of the course, 

 with numerous good spawning riffles and adequate, well-protected 

 resting pools. It is estimated that there is approximately 100,000 

 square yards of suitable spawning area in the lov;er 15 miles, Gaynor 

 Falls, located 15 miles upstream, is 12 feet high. This falls is a 

 barrier to salmon, and it is doubtful if it is passable to steelhead 

 trout at high water stages. 



There once were large runs of chinook and silver salmon ajid 

 steelhead trout into Nason Creek, but the salmon were practically 

 exterminated and the steelhead greatly reduced for many years. 

 Between the years 1939 and 1944 the Grand Coulee fish maintenance 

 project maintained a weir just above the mouth, and transplanted 

 adult chinook salmon and steelhead from Rock Island Dam on the main 

 Colijmbia River into the stream. These fish spawned suqcessfully for 

 the most part, and a small run of spring chinook salmon has been 

 reestablished. The steelhead are more difficult to observe because 

 of their migration during the high water period, but a few returning 

 adults have been seen below Ga^oaor Falls. 



12I-(1). Whitepine Creek. — (Surveyed at various times, 1936- 

 1947} White leather and members of Grand Coulee fish maintenance 

 project.) Enters Nason Creek 14 miles above the mouth. The stream 

 is 8 1/2 miles long, of which the lower 2 miles were surveyed. The 

 discharge ranges from 15 to 50 c.f.s. A short distance above the 

 mouth the course extends through a narrow, steep-walled canyon. 

 A falls 18-20 feet high located 1 l/2 miles upstream is an impassable 

 barrier to the upstream migration of fish. The gradient is steep, 

 and spawning areas are small and scattered. The stream below the 

 falls could accommodate only a small number of salmon. A few of 

 the adult chinook salmon and steelhead transferred into Nason Creek 

 were observed to work their way up this stream as far as the falls. 

 Rainbow trout are numerous, but of small size. 



12J. Lake Wenatchee.-- This lake, located at the head of the 

 Wenatchee River, is 5 miles long and about 1 mile wide. The bottom 

 is largely covered with glacial silt, with little good spawning area. 

 The depth for the most part is 150-200 feet, there being few shallow 

 areas. The shores are mostly rocky and wooded, although there is a 

 swamp area bordering the head of the lake between the mouths of the 

 Little Wenatchee and White Rivers. Lake Wenatchee is important in • 

 that it is one of the few remaining accessible rearing areas for 

 blueback salmon in the Columbia River system. 



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