rfo/d/r>a 



-J- 



PLAN VIEW OF UPPER 

 HOLDING PEN SYSTEM 



-A ttrocf/on Wafer 



O'ffusor - 



^- Supp/i/ Co~r>du/f for Dl ffu-SOr 



LONGITUDINAL SECTION 



■ Control Gafe 

 to reqv/ofe 

 f/otv tfyroogt? 

 Pens O'tcf Trap 



PLAN SHOWING DIRECTION OF 

 FLOW THROUGH BOTTOM OF 

 BRAIL IN HOLDING PENS 



Con trot Gate for 

 Attraction wafer 



Open/na for Atfroct'O/i 

 Wafer ureter Trap 



Suppity, Conda'f 

 fo pi ff us or 



SECTIONAL PLAN AA 



Scale in feet 



Figure 3: --Design drawings of upstream trapping system including trap and holding 

 pens . The water path through the holding pens and trap is indicated. 



