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<br />Land Use/Damage Category <br />A. Industrial - all damage. <br /> <br />B. Public unimproved open <br />space - all damages. <br /> <br />C. Public improved open <br />space - all damages. <br /> <br />D. Private unimproved open <br />space (grazing). <br /> <br />E. Private improved open space <br />(farming). <br /> <br />F. Special Police Protection - <br />Commercial. <br /> <br />G. Structural damage to <br />bridges by trailers and <br />other floating debris. <br /> <br />H. Interrupted traffic or <br />services - public streets <br />and utilities. <br /> <br />I. Erosion - all land uses. <br /> <br />J. General inconvenience - <br />all land uses. <br /> <br />Elimination Reason <br /> <br />No industries in study area. <br /> <br />Damage insignificant. <br /> <br />No land in study area inundated. <br /> <br />Insufficient land in study area <br />inundated. <br /> <br />Insufficient land in study area <br />inundated. <br /> <br />Structural damage insufficient to <br />allow looting. <br /> <br />Field review indicated low probability <br />of damage. <br /> <br />Alternate traffic routes and estimated <br />brevity of service interruptions make <br />category too small for inclusion. <br /> <br />Judged insignificant to warrant inclu- <br />sion. <br /> <br />Undoutedly will occur but insufficient <br />data to place dollar values. <br /> <br />Systematically examining each land use/damage category to eliminate from <br /> <br />consideration those unlikely to occur in a particular drainage basin will <br /> <br />save the analyst considerable time in data collection and manipulation. <br /> <br />Step 4 - Divide the Study Area into Reaches <br /> <br /> <br />Divide the study area into manageable reaches for aggregation of <br /> <br />flood damages. It may be advantageous to have the divisions correspond <br /> <br />to the design points of the hydrologic analysis and/or political <br /> <br />boundaries. <br /> <br />Step 5 - Develop Cost Data <br /> <br />Perhaps the most familiar portion of the benefit-cost analysis is <br /> <br />the development of cost data. For each proposed physical facility, the <br /> <br />60 <br />