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Hust1n, ueorge • April 24, 1984 Page 3 • • The preceding Tables indicate that 15,869 new jobs are anticipated to be added in the western area of the Central Urban Service Area (see attached maps) and 21 ,817 new dwelling units are expected to be added in all of western Dane County by the year 2010. Existing Land Use Controls Urban Service Areas are identified in the Dane County Land Use, Water Quality and Farmland Preservation Plans. These are specifically defined areas adjacent to existing communities which have been determined to be most suitable for development at urban densities over a long range period. The approved boundaries are enforced by a number of local and county land use controls as well as DNR rules which do not permit sani- tary sewer extensions beyond an urban service area boundary. Rural Areas* in western Dane County lie in 15 rural towns (see attached map). Of these 15 towns, all but 3 have adopted exclusive agricultural zoning. This type of zoning generally precludes large scale residential development in rural areas. Of the 3 towns that have not adopted ex- clusive agricultural zoning, 2 are very rural (Primrose and Springdale) with minimal non-farm residential development, e.g. since 1978, only 32 residential building permits were issued for both towns. The third town without exclusive ag zoning, the Town of Middleton, has experienced a number of large scale residential developments, although new lot creation has diminished in recent years. This may be, in part, because there are currently 350 vacant platted lots available in the Town of Middleton alone. In addition, both the City of Madison and the City of Middleton now exercise a three mile extraterritorial plat review jurisdiction with accompanying policies that discourage unsewered residential development. Less than 2 square miles of the town are not covered by this control . While exclusive agricultural zoning does permit some further scattered residential development to occur according to each adopted town land use plan, the amount and location varies with the plan policy. However, most town plan policies limit the non-farm residential development to 1 unit per 35 acres owned. In addition, soil and topographic conditions in western Dane County greatly limit unsewered development because of the difficulty meeting percolation test standards for septic tank installation. In the past 5 years 458 unsewered residential building permits were issued in the 15 town area. Assuming all permits resulted in new dwell- ing units, this would average about 6 new units per town annually. • As shown on Table 1 , the RPC dwelling unit projections to the year 2010 for the entire rural area in the county are 22,163 which represents an added 7,000 units between 1980 and 2010. Historically, dwelling units in the towns in western Dane County averaged roughly 22% of the total *Those areas outside urban service areas. RPC