Pond Design

I need a pond designed out of a gps track that I have uploaded to sketchup. I need 7.5 feet of level road on each side of the line. Then I need a 45 degree incline into the pond that will be 25' deep. I need just a rough design without any grass or trees. I need the design to measure volume of pond and square footage of Material needed from bottom of pond, up the sides and to the outside edges of the 15' road on top.