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One-story single-family dwelling raised on fill, Kauai, Hawaii Eight-story apartment buildings onfill with ground-level parking, Omaha, Nebraska -, Fill This house, which is between 2000 and 2400 square feet in size, was built in 1979 on elevated fill. The photograph presented as Figure A20 shows the house under construction. It was built on a concrete slab. The fill that was used is a residualj tropical soil with a fill height ranging from 0.0 to 4.0 feet. One side of the lot ends with a vertical concrete block wall; the other side blends into the natural ground elevation. The fill was put into place prior to construction of the house. It is estimated that 540 cubic yards of material was used to elevate the house at a cost of $6500 (1982 dollars). The side slopes are covered with grass to prevent erosion or slippage. Four identical apartment buildings constructed in 1976 were placed on fill to raise them above the 500-year flood level. Each building measures 150 in length, 50 feet in width, and 80 feet in height and is made of prestressed concrete and steel. Exterior walls are brick. Each building is situated about 150 feet from Big Papillion Creek, which can flood simply from a heavy thunderstorm. The last major flood occurred in 1964 and lasted less than I day. The ground level below each structure is used for open-ended parking stalls (Figure A21). Apartment units are 10 feet above ground, thus providing flood protection greater than the 500- year level. A small lobby is located on the ground level of each unit. On the opposite side of the buildings from Big Papillion Creek is an anificiallake. The ground floor on that side is below an embankment. Thus, the parking stalls extend only partway beneath the buildings. The cost of including flood proofing in the design and construction of each building is estimated to be $150,000. This is relatively inexpensive considering each building is estimated to have a market value of 52 million. 44