Agenda - 09-12-2006-9d - Laserfiche WebLink

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o(~ry ~ (p~[ ~l' fA V keeping with this requirement, the developer is proposing to limit impervious surface on each lot to a maximum of 11,000 SF of land area (this includes house footprint, patios, sidewalks, driveways, etc.).. This allocation is, of course, simply a inaximum limit, so it is quite possible (and actually would be expected) that residents will not maximize the amount of impervious surface on their individual lots. However, if every homebuilder were to actually utilize the maximum amount of impervious surface available on each lot, this would cause .3.7% of the site to consist of impervious surface. We note that approximately 2.3% of the site is proposed to be used for streets and sidewalks. Therefore, when the maximum buildable azeas on each lot and the streets and sidewalks are combined (.3.7% + 2.3% = 6.0%), it becomes evident that the overall site will be carefully regulated so that it does not exceed the University Lake watershed impervious surface limitations.. In contrast, existing developments, such as the Robins Wood subdivision lots that adjoin Westhampton to the east, may indeed have smaller houses than Westhampton, but they also have much smaller lots and essentially no dedicated open space areas. Therefore, even if the house, driveway, and sidewalk for each of these approximate 1.2-acre (or smaller) lots were limited to only 2,000 square feet in impervious surface, they would have approximately the same relative impervious surface impact on the watershed.. Because of the amount of open space provided within Westhampton, the amount of land area (outside public right-of-ways) associated with each home is approximately 6.6 acres. Therefore, the maximum of 11,000 square feet of impervious surface apportioned per lot is equivalent to 3..8% of this associated land azea. This compares favorably with Robins Wood lots where a 2,000 squaze foot impervious surface budget on an approximately 1.2 acre lot (there is essentially no dedicated open space areas to add to these lot areas) would result in the same 3..8% of the land outside of publicright-of--ways being covered with impervious surfaces. In addition, the Robins Wood lots that adjoin Westhampton have the north-south water feature located east of Westhampton's Pedestrian Open Space Ai'ea (POSA) as their rear property lines, with no stream buffer provided at all, whereas Westhampton will provide a 100' stream buffer measured from each bank. We believe that the combination of the provision of 52.76 acres of open space areas along all of the edges of Westhampton, the incorporation of 100' strearn buffers (measured from the bank of the water feature for a total of 200'+ of stream buffer), and the lazger lot sizes (ranging from 2..58 acres to 5.21 acres) within Westhampton combine to provide a superior level of protection for the University Lake watershed that was not previously provided by the existing developments to which it is being compared. ldreslhamp(on -Response (o StajjConvnen[s Alm ch 22, 2006 Page 4 nj4