You want a big scoop they dont get much bigger then this
http://www.tcmetaldetectors.com/graphics/rtgscoops_files/h8big.jpg
Here is the biggest of big scoops we are adding to our line of RTG scoops. The RTG 8" Hercules Stainless Water Scoop is EXTREMELY BIG. The bucket is made of 304 stainless steel 8" in diameter by 9-1/4" long. The bucket has 5/8" holes punched through-out the bucket. The 1-1/4" diameter handle is stainless steel. We have added a balance grab handle so you can pick the scoop up easier when filled with sand. The balance grab handle is placed about 14" up from the top of the bucket. The bucket is 14 gauge stainless steel. There is also a 1" stainless steel bar welded to the top of the scoop for bucket strength. There is a round stainless tubing welded on the back of the bucket to the handle for strength and for a foot kicker. There are 2 rubber hand grips for comfort. This scoop is made for shallow water hunting. (On this scoop only we are offering a 2 year warranty against manufacturing defects. This warranty does not cover mis use of the water scoop.) Made in the U.S.A. (Including with this scoop is a copy of our Beach Bank book and Hurricane Treasure book) This scoop weighs about 9 pounds.