Remove any debris from the area where bags are to be placed. Place half-filled bags lengthwise, and parallel to the direction of flow.  Fold the open end of the unfilled portion of the bag to form a triangle. (If tied bags are used, flatten or flare the tied end.)   Place succeeding bags on the folded or flared portion of the previous bag,and stamp into place to eliminate voids, and to form a tight seal.  Stagger the joint connections when multiple layers are necessary. For unsupported layers over three courses high, use pyramid placement method.

Pyramid Placement

Pyramid placement is used to increase the height of sandbag protection.   Place the sandbags to form a pyramid by alternating header course (bags placed crosswise)and stretchercourses (bags placed lengthwise).   Stamp each bag in place, overlap sacks, maintain staggered joint placement, and tuck under any loose end.