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<br />Mapping Plan for Colorado <br /> <br />6.3 Population Growth from 1990 to 2000 <br /> <br />The third most important parameter in terms of determining the need for floodplain mapping was <br />population growth, as measured in terms of percentage growth from the 1990 Census to the 2000 Census. <br />Rapidly growing counties were viewed as facing development pressure, including pressure on their <br />floodprone areas. They were viewed as having already experience pressure on those lands in the 10-year <br />measurement period, and as being likely to continue experiencing such pressure. Several Colorado <br />counties are among the most rapidly growing counties in the country in terms of rate of population <br />growth, with Douglas County sometimes being ranked as the fastest growing county in the entire country. <br />On the other hand, some rural Colorado counties are experiencing declines in their population. The range <br />of growth rates went from -25.1 % (a decline) to 191.0%. Table 2 in Appendix B-2 shows the growth rate <br />for all 64 Colorado counties. <br /> <br />Again, CWCB staff felt that standardized scores provided the best way to compare counties to one <br />another. Because some counties have negative values for population growth rate, it was decided to have a <br />range of standardized values from 0 to 5, with 0 representing no growth or negative growth. Table 6.3 <br />shows the "standardized scores" the growth rate ranges they represent and Figure 4 illustrates population <br />growth for Colorado countries. <br /> <br />Table 6.3 - Population Growth Ranking <br /> <br />Range of Population Growth Rates Standardized Value Number of Counties <br />0% or less 0 6 <br />0.1 % to 20.0% 1 18 <br />20.1 % to 40.0% 2 23 <br />40.01 % to 60.0% 3 6 <br />60.01 % to 80.0% 4 3 <br />Greater than 80.0% 5 8 <br /> <br />12/26/2002 <br /> <br />Page 18 of 38 <br />