I am building a small building on a slope. There is an 18 inch fall across 16 feet. I want to put a berm at upper end of the slope near the building. There is also a fall 90 deg to the aforementioned fall. I am considersing putting the berm in at an angle so as to direct the water coming down slope away from the building, which would take advantage of the second mentioned slope. I would appreciate any info on how wide and how high to make the berm. How close to the building can it be placed. Also do I "press" the dirt down with the back hoe? My wife wants to plant flowers in the berm. Is that practical or must the berm be sodded ? Any and all help apperciated.