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<br />(j lltJ n 6 <br /> <br />MEMORANIJJM A <br /> <br />TO: <br />FROM: <br />SUB JECT : <br /> <br />Committee on Balanced <br /> <br />June <br /> <br />/' <br /> <br />Population <br /> <br />21, 1972 <br /> <br />Legislative Council Staff <br />Colorado Population Projections <br /> <br />I(ECD~/~ <br />JUN .? <br />caL :2 81912 <br />cONSER 0. It;, <br />VI/rlo,v . <br />DU" <br />.,,,~ <br /> <br />Introduction <br /> <br />In order to project population levels for a given ar.ea, <br />it is necessary to consider two factors: the natural rate of~ <br />growth and the rate of in-migration. The natural rate of <br />growth is the. total number of births less the total number of <br />deaths. The rate of in-migration is the difference between <br />the number of persons entering and the number of persons leav- <br />ing the area. <br /> <br />This memorandum compares population projections pre- <br />pared for the State of Colorado {or geographic subunits of the <br />state) by various government or private agencies. These agen- <br />cies are: <br /> <br />1) Denver Regional Council of Governments <br /> <br />2) Denver Board of Water Commissioners <br /> <br />3) Colorado Department of Highways <br /> <br />4) Regional Transportation District <br /> <br />5) Colorado State Planning Office <br /> <br />6) Denver Chamber of Commerce <br /> <br />(Council staff inquiries determined that Public Service Comp- <br />any, Mountain States Telephone, and the Federation of Rocky <br />Mountain States do not prepare population projections.) <br /> <br />Immediately following is an analysis of the assumptions <br />made by each agency about future rates of natural increase and <br />in-migration. The assumptions should be reflected in the re- <br />sults of their respective population studies. This analysis <br />is followed by the projections themselves (Tables 1 - 3; Fig- <br />ure 1). <br />