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v., UL TIMA TEPOPULA TION PROJECTION An ultimate, or holding -capacity, land use and population'projectionwasalso'e~tablished inthe City of'San Marcos' Comprehensive Plan. First, known densities of development,we~e ,consid~red. Then, based upon there~aining developable vacant land in San 'rvlarcosand: itsETJ,'densitiesof anticipated development projects were applied. .The ultimate' population of the -City of. San Marcos is a function ofanticip'ated residentiallandu~earea (acres),housin,g-density (dwelling units per acre), and. population. density (persons per dwelling' unit). Based. upon the land . uses identified on, the Future _Lal1dUse ,Plan,_the total.ultimate land. use areas of'single-family-housing',werecalcuJated using average densities ranging fr()m '0.75 to 5 dw_elling units per acre. When the ETJ is combined with the area within the existing City limits, enough land area exists to support a population of appro~imately 300,OOO.to400,OOQ.persons. The.adopted Horizon Pla'n projects a 2050 'population of 169,400 persons. VI. SUMMARY- The'data used .to compile. these. land use assumptions were from three sOUrces -- -anticipated -devel-opment for the; City nfSan Marcos, residential b'uilding,permitdata and other data from the City, .and _ information' from the Compr-ehensive Plan .and '.Future- Land Use Plan~." The ten-year growth projections were' calcu Jatedbased upon reas'onable growth - rates' a nd,- trends' for Sa n" Marcos - and the region. Ultiniateprojections were 'based upon the holding capacity ()f vacant 'and using land use types and applying densities as estabUshed by developmentpoliciesr the Future Land Use Plan, and ,known proposed development plans__ 'The land use 'assumptions,'maybe.summarized as follows: . San Marcos presently contains approximately 17.4 square miles within the 'City's 'corporate limits, abo,ut 48% ofwhich is presently undeveloped (vacant). The total area oft'he water service are is 45,354 acres andthe':Total area 'of the wastewater-service' area is 59,565-. . Existing estimated population of San Marc()s j'n the year 2002'was40,514 persons. The estimated population of the water and wastewater service- area is 45,800 persons and 51,350 'persons respectively~ .- A compounded average- annual 9.romh rate. of approximately 2. 70/0, or aboLJt 675, residential dwelling units.peryear, was used to calcu,late,SanMarcos' ten-year growth pr9jecti()ns~ ;_ The'-ten-yearpopul.ation, growth projections for San Marcos water and-wa.stewater ,areas are Lan'd,UseAssumptions for Impact Fees -- August, .' 2002 -City of San' Marcos, Texas .' '_._ C;\DOCUME-1 \THERIO-1 \LOCALS-1 \Temp\LandUseAssump-report 08212002.doc 12