Figure 5» — Large portable-type weir and trap in Pendill's Creek, 



Chippewa County, Michigan. 



have any local beneficial effects on fish stocks in the lakes 



(3) To develop and test improvements in the design and construction 

 of mechanical control structures} and, 



(4) To provide needed additional sites where adequate checking struc- 

 tures (weirs and traps) were present for testing other devices or 

 techniques of control 



Continued operation of the devices in this zone in future years is 

 essential to the successful attainment of all objectives sought. 



Lake Michigan — In Lake Michigan the Service contributed materials 

 and technical assistance for construction of 7 portable-type weirs and 

 traps operated by the Wisconsin Conservation Department, Entire runs were 



