System 3 ( One generator as normal , one generator as standby- 

 source of power ) g The Carp Creek and Squaw Creek devices were operated 

 successfully with this method of power supply. The normal source gen- 

 erators supplied power at these sites throughout the conduct of the 

 experiments with the exception of those periods during which they were 

 stopped manually in order to test-run the standby generators. The 

 standby generator at each site was test-run approximately 200 hours? 

 both operated in a completely satisfactory manner without breakdown. 

 The time interval required for the standby generators to "take over" 

 upon interruption of the normal source generators was in both cases 

 equivalent to that described under System 2. The power capabilities of 

 the normal and standby generators used in System 3 were more than suffi- 

 cient to supply maximum weir loads encountered. 



(8) Costs of installation and operation 



Installation costs for the four structures tested in 1952 were 

 as follows t 



Structure 



Materials 



and 

 equipment 



Labor and Operation of 



field vehicles and Tota l 



supervision 



construction 

 equipment 



Kewaunee River 

 electromechanical 

 weir and trap 



$1,8^2.91 $2,U58.65 $97.63 



t.399.19 



Squaw Creek 



ele ctrome chanical 



weir and trap 



1,703.06 1.092.U8 



5U.36 2,81*9.90 



Hibbards' Creek 

 electrical barrier 



1,599.92 1,038.28 



21.60 2.669.80 



Carp Creek 

 electrical barrier 



1,599.92 



327.73 



3.U9 1,931.1U 



Operating costs fall into two major categories - electrical power 

 and labor. Commercial line power supplied to the Kewaunee River electro- 

 mechanical weir and trap between April 23 and June 17 cost $62.70 for 1.680 

 KWH (kilowatt hours) used. Similar power supplied to the Hibbards" Creek 

 electrical barrier between April 16 and June 18, 1952 cost $52. 3U for 

 1,366 KWH used. 



U3 



