Plate 18



   Upper: Following marking out and site preparation, the construction stage has reached the point where the lockpipe has been laid and earth is being placed to cover it. The width 'of the wall extends right across the picture, the forward bulldozer is over the centre of the wall and on the left is seen the topsoil which is to be pushed up over the wall on the completion of the work. Note the end of the cut-off trench on the right of the men.

   Lower: Nearing the final formation of the wall, bulldozers trim-up prior to finishing work for the day. (Plate 22, upper, shows part of the site work of this reservoir.)