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The 4-in (102 mm) side of the board should rest on the pitcher's plate while the 1 in (25 mm) sides face outward. The entire length of the 4 ft (1.2 m) board should be parallel to the pitcher's plate. Rest the 2-in (51-mm) side on top of the other board with the 4 in (102 mm) sides facing outward. The entire length of the 10-ft (3 m) board should be angled down toward one edge of the plateau so that you can use the long board to distribute dirt for the mound. Spread the mixture out along the length of the board. Situate one person at each end of the long board. Keep one end of the board resting on the pitcher's plate and use that as your pivot point.The person with the far end of the board (not the pivot point) should slowly move from one end of the plateau to the other, using the board to distribute the dirt over the mound. The slope from the pitcher's plate should begin 6 in (152.4 mm) in front of the rubber, and slope toward home plate 1 in (25.4 mm) for every 1 ft (0.3 meters). Measure the height with a transit level, and use the clay and dirt mixture to fill in any low spots. Once the mound has taken shape, pound the surface area of the mound with a tamp to ensure there are no loose areas. Then, use a rake to remove any pebbles or chunks of grass and smooth out the dirt. Use a hose to lightly wet the area. The water will soak into the mound and firmly set the clay. Regular watering also will prevent the mound from cracking or eroding.
Place a 1 in by 4 in by 4 ft board on top of the pitcher's plate. Rest a 10 ft by 2 in by 4 in board on top of the other board. Dump a wheelbarrow full of dirt and clay in front of the longer board. Use the long board to spread the dirt out. Ensure your slope measurements are accurate. Tamp and rake the mound. Moisten the mound with water.