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MEMO Date: January 4, 1999 To: Dennis Welsch, Community Development Debra Bloom, Engineerin_ PUD Concept Development Plan For Cox Insurance Associates, Inc. 3116 Fairview Ave. North From: RE: We have had an opportunity to review the PUD concept development plan for the construction of an Insurance Building at 3116 Fairview Ave. N. We would like to work with you on making this project the best proposal possible and have the following engineering related comments. Since some of these comments could impact the proposed site plan, it is difficult for engineering to make a positive recommendation for this proposed rezoning until some of these issues are addressed. Site Plan 1. The Ramsey County right- of- way guidelines require the dedication of an additional 10 feet of right- of- way along Fairview Ave. This will impact the proposed site plan. It appears that the proposed design does take this additional right- of- way into account. Right- of- way 1. We have had discussions with the Arden Hills Public Works staff regarding the proposed right- of- way vacation. Their primary concern is retaining enough right- of- way to maintain the existing in place utilities and street configuration. 2. There is a sanitary sewer line south of the centerline of County Road D. This pipe is 12 feet deep. We must retain 24 feet of right- of- way centered on this pipe to maintain OSHA trench requirements when work is done on this pipe. The area shown as right- of- way to be vacated on your site plans would not retain the necessary right- of- way for utility maintenance work. We are willing to work with the applicant on the vacation of a portion of the County Road D right- of- way. However, it would be short sighted of the City to vacate right- of- way that is needed for public and private utilities. 3. It appears that to meet the needs ofthe City as outlined above, it will be necessary to remove the northerly- most portion of the building (the stairwell to the basement). To address the applicant's needs the City would consider vacating the right- of- way to the northeasterly back corner of the existing building (Approximately 7 feet of right- of- way). This would address the issue of an existing building on right- of- way, as well as retaining enough right- of- way for City purposes. 4. The utilities and street alignment/ width should be shown on future plans for the site, to better illustrate the impacts to the surrounding road system. Existing utilities should be shown on the plans as well to ensure that we are not vacating right- of- way that is in use. The restoration of the street to green space and installation of curb and gutter would be the applicant's responsibility. 5. As with all right- of- way vacations there will be an issue of ownership once the City relinquishes its interest in the right- of- way. Grading Plan 1. It appears from existing City contour maps that this site drains overland to the southeast There is an existing low area on the site where water is retained prior to sheet draining over the neighboring properties and ultimately out to Wheeler St N. storm sewer. Additional information on the grades for this site should be provided to ensure that increased impervious will not increase the amount of runoff to the surrounding properties. 2. Please provide information on the proposed storm sewer. This should include location, size, and type of pipe as well as proposed inverts and connection to the City system. It appears from the architect's plan 6\1f\ \j'^-<