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Staff Report to the Planning Commission Lands of Ascension Development LLC 26491 Ascension Drive June 5, 2008 Page 5 of 18 Drainage Water runoff generated from the new development will be collected and carried to an onsite storm water detention system located at the south east comer of the property. The water is then carried into the storm drain which runs along the south property line. Pursuant to Section 10-2.503, Drainage Facilities Standards, of the Municipal Code, the Engineering Department has reviewed and determined that the proposed drainage design complies with Town requirements. The Engineering Department will review and approve the final drainage plan prior to acceptance of plans for building plan check. Final "as - built" grading and drainage will be inspected by the Engineering Department, and any deficiencies will be required to be corrected prior to final inspection. Grading Policy Exception Total grading quantities for this project include 8,369 cubic yards of cut for the basement, front yard, rear yard, driveways, backup area, swimming pool, spa, and cabana. The Engineering Department has reviewed the proposed grading plan and concluded that it is not in conformance with the Town's grading policy. 1. Driveway and backup area adjacent to the basement garage The applicant is proposing up to 10'6" of cut along the north property line to accommodate the driveway and backup area adjacent to the basement garage. The original plans submitted by the applicant on November 30, 2007 showed a driveway and backup area that complied with the 8' cut for the basement garage. In February 2008, it was brought to staffs attention that the topographic survey prepared by Steven Arnold Civil Engineering, Inc. dated November 27, 2007 may have been flawed. Engineering staff investigated and confirmed that the survey in fact contained errors and portions of the proposed basement would not meet the requirements of the basement ordinance. On April 14, 2008, the applicant submitted a new topographic survey prepared by Lea & Braze Engineering, Inc which corrected the errors. Based on the revised topographic survey, the applicant had to lower the house an additional 6" and move it back 5' in order to comply with the basement ordinance. However, as a result of this change, the driveway cut necessary to access the basement garage now exceeds the 8' maximum allowed per the Grading Policy. Per the Towns Grading Policy, 'Driveway cut may be increased up to a maximum of eight feet (89 for the portion of the driveway or backup area which is adjacent to a garage that has been lowered with a similar amount of cut. " Additionally, requirements