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<br />POPULATION AND STRUCTURES AT RISK <br /> <br />INVENTORY METHODOLOGY <br /> <br />The inventory of structures was conducted with supervisory. <br />assistance from Dan Bunting of the Pikes Peak Regional <br />Building Department and Mark Matulik of the Colorado Water <br />Conservation Board. Mr, Matulik and three students at UCCS <br />were involved in gathering the data. <br /> <br />Primary resources were the latest flood plain maps <br />published by the Federal Emergency Management Agency. The <br />maps indicated areas subject to potential 100 year and 500 <br />year floods (floods with 1% and 0,2% annual frequencies), <br />Data were collected by street addresses and classified under <br />appropriate jurisdiction and tributary, Estimated error in <br />the data collection phase is under three percent. <br /> <br />Data from the 1980 census of population were used in <br />estimating the population in these areas. The figure used was <br />population per household. Each residential unit was counted <br />as one household. As an example, five single family homes (or <br />multi-family units) in census tract 34, which has 2,39 <br />persons/household, equal 11,95 people, No adjustments for <br />vacancies were made. <br /> <br />Each jurisdiction was.broken down by subtotals of single <br />family structures, multi-family structures, residential units, <br />single family and mUlti-family populations. A further break <br />down was completed by tributary with the above subtotals (SFH, <br />MFH, etc.). Other data on non-residential structures were <br />also collected, All the information was compiled on computers <br />at UCCS. <br /> <br />INVENTORY RESULTS <br /> <br />The results of the regional inventory are summarized in <br />Table 1 which shows the numbers of structures and people <br />occupying the 100 year flood plains in the region and in the <br />six jurisdictions with significant risk. (2) <br /> <br />The Region contains 3,368 single family structures, 88 <br />multi-family structures and a total of 3,979 residential units <br />in its flood plains, The estimated population in these units <br />is 9,338, In addition, 681 non-residential structures were <br />inventoried. <br /> <br />-------------------- <br /> <br />(2) Monument is omitted because it has only a single, non- <br />residential structure in the flood plain within its <br />boundaries. <br /> <br />6 <br />