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Final Plat Review Memo from Mak Sweidan 9-20-05 CITY OF CHANHASSEN 7700 Market Boulevard PO Box 147 Chanhassen, MN 55317 Administration Phone: 952.227.1100 Fax 952.227.1110 Building Inspections Phone 952.227.1180 Fax: 952.227.1190 Engineering Phone: 952.227.1160 Fax 952.227.1170 Finance Phone: 952.227.1140 Fax 952.227.1110 Park & Recreation Phone 952.227.1120 Fax 952.227.1110 Recreation Center 2310 Coulter Boulevard Phone: 952.227.1400 Fax: 952.227.1404 Planning & Natural Resources Phone: 952.227.1130 Fax 952.227.1110 Public Works 1591 Park Road Phone 952.227.1300 Fax: 952.227.1310 Senior Center Phone: 952.227.1125 Fax: 952.227.1110 Web Site www.ci.chanhassen.mn.us MEMORANDUM TO: Bob Generous, Senior Planner FROM: Mak Sweidan, Engineer ~ September 20, 2005 DATE: SUBJ: Final Plat Review of Harvieux Addition Land Use Review File No. 05-09 Upon review of the plans submitted by Demars-Gabriel Land Surveyors, Inc. dated September 12,2005, I offer the following comments and recommendations: GRADING, DRAINAGE & EROSION CONTROL The existing site is heavily wooded with tree cover over approximately 80% of the area with an existing house. The plans propose to grade about 9% to create two new house pads and a proposed private driveway access off of Horseshoe Curve for Lot 1 and off Pleasant View Drive for Lot 2. The proposed grading will prepare the site for full walk-out house pads. Drainage swales have been proposed along the sides of the houses to maintain the neighborhood drainage pattern through the property. The existing site drainage is encompassed within two different drainage areas. The site drains off site to the southeast and southwest directions toward Lotus Lake. The applicant is utilizing the existing grade contour and is not proposing any storm sewer system. Overall, staff is fine with the proposed grading but has some concerns on the grades along the east side of the parcel that may affect the existing house on the east side of the parcel; as such, staff would recommend installing gutters on the house on Lot 2 and discharge stormwater to the southwest comer. The plan proposes retaining walls for the driveway access on Lots 1 and 2. The applicant should be aware that any retaining wall over 4' in height must be designed by a structural engineer registered in the State of Minnesota. Also, it will require a building permit from the Building Department. Tree preservation fencing must be installed at the limits of tree removal. All disturbed areas, as a result of construction, shall be seeded and mulched or sodded immediately after grading to minimize erosion. A 75-foot minimum rock construction entrance must be added to the entrance that will be accessed during construction. If importing or exporting material for development of the site is necessary, the applicant will be required to supply the City with a detailed haul route and traffic control plan. The City 01 Chanhassen . A growing community with clean lakes, quality schools, a charming downtown, thriving businesses, winding trails, and beautiful parks. A great place to live, work, and play. Bob Generous September 20,2005 Page 2 UTILITIES No public utility improvements are proposed. The applicant is proposing to extend the water and sanitary sewer services from the City's sewer and watermain off Pleasant View Road for Lot 2 and off Horseshoe Curve for Lot 1. The developer must submit a security to ensure that the street cuts are properly restored to City standards. According to the City's Finance Department records, the parcel was previously assessed for one sanitary sewer and water hookup. However, the sanitary sewer and water hookup charges will still be applicable for each of the new lots. The 2005 trunk hookup charge is $1,458 for sanitary sewer and $2,955 for watermain. Sanitary sewer and watermain hookup fees may be specially assessed against the parcel at the time of building permit issuance. All of these charges are based on the number of SAC units assigned by the Met Council. STREETS The plan does not show any public street improvement. The plan proposes accessing the lots via a private driveway access from the northeast corner of the parcel off Pleasant View Road and Horseshoe Curve. Staff recommends relocating the Lot 2 driveway access to the south along Lot 1 's north property line to create more separation from the northern parcel's existing access. RECOMMENDED CONDITIONS OF APPROVAL 1. Relocate Lot 1 sanitary sewer and water services from the northwest off J/ Pleasant View Road to the west off Horseshoe Curve. 2. Permits from the appropriate regulatory agencies will have to be obtained including but not limited to the MPCA and the Watershed District. 3'r ~l:1gy/ a miRiw'lw 75 m9t Feek Mlishuai6B eBtMR88. 4. Tree preservation fencing must be installed at the limits of tree removal. I' 5. Add a note to the plan: All sanitary services must be 6" PVC-SDR26 and water service 1" copper. 6. If importing or exporting material for development of the site is necessary, the / applicant will be required to supply the City with a detailed haul route and traffic control plan. 7. The sanitary sewer and water hookup charges are applicable for each of the new lots. The 2005 trunk hookup charge is $1,458 for sanitary sewer and $2,955 for watermain. ,/ Bob Generous September 20, 2005 Page 3 8. All disturbed areas, as a result of construction, must be seeded and mulched or r sodded immediately after grading to minimize erosion. 9. Gutters must be installed on the house on Lot 2 and must discharge to the southwest comer ofthe lot. 10. Submit a security to ensure that the street cuts are properly restored to City standards. !>-/ 11. The applicant should be aware that any retaining wall height more than 4' in height must be designed by a structural engineer registered in the State of Minnesota. Also, it will require a building permit through the City's Building Department. 12. Cleanouts required at all bends of the sanitary sewer service or every 90 feet, whichever is less. c: Paul Oehme, City Engineer/Public Works Director Alyson Morris, Assistant City Engineer g:\eng\projects\harvieux addition\tpr.doc