Tilton River Arm 



Cowlitz River 



Harmony Rd. 

 TROUT Bridge 



HATCHERY 



Experimental Area 



Si 



Mayfield Dam aI \s\ 



FISHING POSITIONS 

 3 , 4 ,5 [5J [5)6.7,8.9, 10 .11, 



PROFILE 



-10 m. 



-20m. 



30 m. 



Figure 1. — Experimental area at Mayfield Reservoir and diagrammatic depth profile viewed from upstream side. 



2 



