The Hibbards' Creek installation was operated as a uniform 

 field barrier. In all tests the ground or neutral side of a 110 VAC 

 line was connected to the submerged lateral electrode. The suspended 

 row of electrodes was then connected to the ungrounded side of the 

 110 VAC line. 



Commercial line power for operation of the barrier, flood- 

 lights, and utility lights was carried from a distribution transformer 

 into a kilowatt-hour meter and through the fuse and switch boxes to 

 the electrode connections. No emergency or standby source of power 

 was provided. 



(U) Carp Creek electrical barriers . — The principal electri- 

 cal barrier tested in Carp Creek was very nearly identical with that 

 installed in Hibbards" Creek (Figs. 10 and 11). It differed in that 

 the suspended electrodes were made of l/2-inch 0. D. thin-walled con- 

 duit and in the somewhat smaller size of the array. Carp Creek was 35 

 feet wide at the point of installation and varied from 9 to ll; inches in 

 average depth during the period of operation. The array likewise was 

 35 feet in overall length. 



Figure 10. Electrical barrier installed in Carp Creek in 1952 with 

 upper and lower checking weirs. 



19 



