Agenda - Parks and Recreation Commission - 01/11/2001

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Preliminary Plat Review: Northfork-St. Andrews Addition December 21, 2000 Page 2 of 3 4. Park Dedication: In accordance with the May 9, 1989 Northfork Park Dedication Agreement, there is a park dedication obligation of $500.00 per lot. Streets: The lots are proposed to receive public access from the extension of Inverness Lane to the south and St. Andrews Lane to the north. In addition, the applicant is proposing two new.cul- de-sacs, Inverness Court and St. Andrews Court. Both cul-de-sacs conform to city ordinances and do not exceed 600 feet in length. The cul-de-sacs, however, deviate from the Ramsey street naming guidelines. The proposed streets are 30 feet face to face and are consistept with the standard detail for streets in the area. There is not a detail or dimension for the radius o'f the, cul-de-sacs. According to the minimum subdivision design standards in Chapter 9 of the City Code, cul-de-sacs must have a minimum diameter of 100 feet. It appears from scaling that this standard is not being met. There is also not a dimension for the intersection radii but it should be noted that these must be at least 20 feet. It appears from scaling that this standard is being met. All street grades meet the design standards of not less than 0.4% and no greater than 4%. According to the design standards, a tangent of at least 50 feet should be introduced between reverse curves on all streets. The proposed alignment varies from this requirement in two areas cq Inverness Lane, however, Staff believes that this requirement be waived due to the len~h of curves that are being proposed. An increase in the tangent lengths between the reverse curves will likely increase the degree of curve and sharpness of the curves and therefore not achieve the desired results of increasing sight distances. Drainage and Grading Plan: This d~velopment will require the issuan6e of a Watershed Management Organization permit..The site should be surveyed by a wetland specialist and if any wetlands are present,, they should be delineated prior to final plat'approval. It appears from the Wetland Inventory Map that there may be wetlands close to the site and the WMO will verify these results in their permitting process. An erosion control plan must be submitted as part of the grading and drainage plan. Siltfence should be placed along disturbed areas that come within 25 feet of the adjacent properties and golf course. It is preferable to have surface drainage grades greater than 2%, but absolutely not [ess than 1% and surface drainage should not be transmitted over distance greater than 700feet. While it appears that there is sufficient storage within the development, consideration should be given to the addition of a pond on or near Lots 15-17, Block 2 to improve surface drainage in that area. The addition of this pond could be avoided with the elimination of the walkouts on Lots 17 & 18, Block 2. Easements: The standard 10 foot drainage and utility easements (5 feet on common property lines) are provided on lot perimeters. /q