Agenda - Council - 01/23/2001 - Laserfiche WebLink

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I I I Preliminary Plat Review: Northfork-St. Andrews Addition January 17, 2001 Page 2 Andrews Court. Both cul-de-sacs conform to city ordinances and do not exceed 600 feet in length. The street names on the cul-de-sacs, however, deviate fi-om the Ramsey street naming guidelines and will need Council approval. The proposed sweets are 30 feet face to face and are consistent with the standard detail for streets in the area. 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. The revised plans show that this standard is 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 on Inverness Lane, however, Staffbelieves that this requirement be waived due to the length of curves that are being proposed. An increase in the tangent len~hs 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 development will require the issuance of a Watershed Management Organization permit. 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. Silt fence 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 less than 1% and surface drainage should not be transmitted over distance greater than 700 feet. It appears that all grades are at least 1%. The lots with slopes less than 2% will be listed in the development agreement and will need a certificate of survey prior to issuance of a certificate of occupancy verifying grades and elevation. Easements: The standard 10 foot drainage and utility easements (5 feet on common property lines) are provided on lot perimeters. All areas to be used for the transference and storage of storm water should be dedicated as drainage and utility easements. Any ponding that is used for storage of storm water discharge fi-om the street and the development shall be included in a drainage and utility easement up to the Ordinary High Water level and should have at least one easement for access. This access can and is most often the same as the easement for the storm water discharge pipes and is required for future maintenance. -127-