Agenda - Council - 01/22/1991 - Laserfiche WebLink

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City of Ramsey 15153 NOWTHEN BOULEVARD N.W., RAMSEY, MINNESOTA 55303 · (612) 427-1410 January 15, 1991 Honorable Mayor and City Council City of Ramsey 15153 Nowthen Boulevard N.W. Ramsey, Minnesota 55303 RE: FINAL PLAT APPROVAL OF NORTHFORK LINKS Dear Mayor and Councilmembers: On May 22, 1990, preliminary plat approval was given by the City Council for Northfork 5th Addition Subdivision. At this time, the developer wishes to receive final plat approval for the Northfork Links Subdivision which is a portion of the aforementioned Northfork 5th Addition Subdivision. Northfork Links contains 13 residential lots fronting on Andrie Street N.W. which is an existing and improved street. Five additional lots are also being platted which include: Lot 1 of Block 1, Lot 1 of Block 2, Lot 10 of Block 3, Lot 5 of Block 4, and Lot 1 of Block 6. These five lots are to be developed as an 18-hole golf course. The lots which are being platted as Northfork Links conform exactly to those previously identified and approved in the Northfork 5th Addition Subdivision. I have reviewed the proposed plat along with a 12osheet set of plans prepared under the seal of Ralph Wagner, P.E., and offer the following comments: 1) Drainage: A drainage analysis for the area encompassing Northfork 5th Addition has been prepared by Probe Engineering, Inc. which consists of computer analysis for five year, ten year and one hundred year storm events. As a result of these calculations, I have concluded that no existing or future streets will be flooded from a 100 -year storm event and no residential property will be inundated as a result of a 10-year storm event. Furthermore, only two future residential lots will be inundated to any degree by a 100-year storm and the degree of flooding will be confined to an area less than 10% of the property along the rear lot lines. With the exception of a single area on the southern end of the plat, all surface drainage will be contained within the plat itself. The aforementioned area which drains off-site is discharged through an 8.5 by 14' railroad underpass located approximately 2/3 of a mile southeast of the railroad tracks intersection with 153rd Avenue N.W. From the railroad culvert, the flow is transmitted across Highway 4410 to a highway ditch via a 24" concrete pipe. This outfall system will receive no discharge from the development for up to a five year storm event and will have a discharge of 0.5 csf during a ten year storm event which represents a small fraction of the pipe's capacity. 2) Grading: The plans contain building pad elevations for 13 platted residential lots. The grades submitted are acceptable and will provide a minimum r/se of 1.5' above the road while maintaining driveway grades of less than 10%. The plan also