Color of streams ; Classified as brown or colorless^ by visual examina- 

 tion. 



Turbidity of streams; Classified as clear^ or slightly, moderatelyj or 

 heavily turbid » 



Water levels ; Annual fluctuations were determined by noting high=»water 

 marks and condition of stream at time of examlnationo When possible,, 

 the characteristics of individual streams in relation to extent of pre- 

 cipitation were recorded^ Special attention was paid to water-level 

 conditions at proposed control sites c 



Pollution; Sources of industrial and domestic pollution were noted 

 (visually) and recorded., 



General topography and geographical features ; Stream banks, flood plains, 

 and the surrounding coijntry were described,, General measurements such 

 as heights, widths and contour vjere recorded. Soil and plant types tvere 

 noted, although not in great detail „ Road conditions, location of power 

 lines, and relative accessibility of streams and proposed control sites 

 were noted „ 



Location of control sites ; Potential control sites were located in most 

 streams which were found to have productive possibilities.. Criteria for 

 selecting control sites (for mechanical weirs | barrier dams^ and electrical 

 devices) were established during experimentation with various types of 

 control devices (Applegate and Smith 19^1) = Flora and fauna ; Only limited 

 observations were made^ Exceptional conditions (for example, extreme 

 abundance of aquatic plants) were noted. A limited amount of seining for 

 fish was done. 



Evaluation of streams 



For the sake of convenience and simplicity, the entire Michigan 

 watershed of Lake Superior has been divided into 22 areas (figs. 2-=23 

 tables 1=22), each of which is discussed separately. 



s 



With each figure and table are brief comments on the area and its 

 streams, factors which may inhibit or prevent spawning in the future, 

 and control possibilities. 



