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Planning Commission Minutes May 8, 1996 6(c) Planning File 2823 Frank Tschida request for preliminary and final plat approval for 8 single-family lots at 350 S. Owasso Boulevard. Chairman Keith Wietecki opened the public hearing and requested Michael Falk to provide a background report. Michael Falk provided a report based on a written staff report of May 8, 1996, and a video report on the site. He noted the site is 2.54 acres and zoned R-l. It is designated low density on the city's Comprehensive Plan. The proposal is to create 8 lots at a density of3.15 units per acre. All lots would meet the 11,000 square foot size. However, 6 of the lots along the cul-de-sac would require a 5 foot lot with variance at the setback line to allow each lot to be 80 feet in width. Surface water ponding would be handled by creating a pond between the back lots of the lots facing the cul-de-sac and the lots which face Owasso Boulevard. There would be a restricted catch basin on this drainage pond. The pond would be dry in all seasons except when collecting and dispersing water from a current rain. Michael Falk also explained the project grading on the site which requires matching existing steep grades from back yards to the south and west. The city street standard requires a maximum 6 percent grade. In this instance, the developer proposes a 3 /12 percent grade at the intersection with Farrington and a 1 to 2 percent grade in the cul-de- sac, but will require an 8 percent grade over 80 feet of Farrington Court. Michael Falk stated that the staff recommends approval including variances needed for the 6 lot front yard widths of80 feet, and the 8 percent grade over 80 feet of Farrington Court. Member Cunningham asked for clarification regarding the holding ponds. Chuck Plowe, Project Engineer, described the slope and new grades on the site. Member Wietecki asked for clarification regarding the drainage on the northern part of the cul-de-sac and the street and pond. He expressed concern with the drainage in the back yards from overflow in the pond. Assistant City Engineer, Jay Kennedy, explained the grades and noted there may be some problems coming off or east on the street during a slippery or winter day. lfthe grade were 8 percent for no more than 80 feet along the street, Mr. Kennedy said that could be acceptable. Member Harms asked if the property owners had been properly notified for the variance portion of the subdivision. Michael Falk responded that the notification for the subdivision and inherent redesign of the site is adequate for notification. Member Wilke asked for clarification regarding pond sizing and storm water run-off into Lady Slipper Park. He asked who will manage the ponding area. (The city will have an easement over the storm pond and the pipe system.) The pond will drain dry after a rain. 11