A.) Main Harvest Channel 1)All 4 outlets from the channel: Each outlet has a valve PEN STOCK (#9). The valve is operated from the production floor. The location of the outlet hole of the valve is chosen after the valve is selected. Flanges/backing ring: Dimensions decision is not final and depends on the piping supplier standard , will be given later 2) Each pair outlets is bordered by a kind of small room(1.3) from which there is a passage to the direction of the channel including double rails (1.4) which hold the STOP LOG (#5) On the other side, the rigid net (#6) (GRADING) GRP is installed to prevent the exit of the fish. 3)The double rails(1.4) and valve PEN STOCK (#9) need to withstand hydraulic load of a full tank (filled to the top)