05/10/1999 Council Packet - Laserfiche WebLink

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Peregrine Pass PDO April26, 1999 page 7 Impervious surface: A planned development allows for flexibility. Under the proposed plan, the road pavement will not be as wide as in normal developments. This reduces the amount of impervious surface, which allows more infiltration of water. Roads, access and safety: One lot will access 12th Ave. The other nine lots will access the internal cul de sac. The roads can handle additional traffic generated by ten homes. In any development, each access onto a road is a potential safety concern: more access points mean increased probability of accidents. The proposed plan prevents numerous driveway accesses onto 12th Ave. and Holly Drive. Nine out of ten lots will access 12th Ave. via a new cul de sac road. Thus, instead of 10 new driveway accesses, there will be on driveway access (Lot 10) and one road access. Density, Lot Sizes: Gross density is 1.35 units per acre. Net density, counting only the uplands, is 1.69 units per acre. The same number of lots (10) would be possible under R- 1X zoning. The minimum lot size for an R -1 zone is 10,800 sf of buildable land. The R1 -X minimum is 12,825 sf. Only two lots (Lots 7 and 8) do not meet the R1 -X minimum. All lots meet the R -1 minimum. The greatest departure from normal zoning is in the lot widths. Minimum lot width for R -1 is 80 feet, for R -1X is 90 feet. All but one lot have shorter lot widths than 80 ft. The lots increase in width farther from the road frontage. Minimum side yard setbacks could be met (10 ft.) where the building pads are placed on the plat. The smaller lot widths allow for a design that avoids filling wetlands and the loss of trees due to driveways onto 12th Ave. Minimum house footprint sizes of the R -1X zoning district will be a condition of approval. Open Space No large open space is possible on this relatively small development. However, the large wetland acts as about 1.5 acres of open space. If an additional buffer area can be ensured, it would add 0.96 acres of open space. Adding the trail corridor of about 0.25 acre would total approximately 37% of the site as open space. The City could hold a conservation easement on the buffer strip around the wetland. Park Dedication The Park Board reviewed this item at their April 5th meeting and recommended the following: