Site Preparation for ICF Home Time to start clearing and grubbing operations. Clearing and grubbing operations were performed by Angled Engineering's owner Nick Konopacki, P.E. and a CAT D4 bulldozer. Time for clean up. Ready for fill! The building site took over 6,500 cy of fill. Angled Engineering performed and managed fill operations to ensure proper compaction was met. Dumping pad was created with select crushed material for the 435 dump trucks to back up onto and dump the fill over the edge. 175' retaining wall was designed and constructed by Angled Engineering to achieve the home's 1st floor final elevation. Final wall height reached nearly 8' tall. Wall is complete and ready for footings!