07/14/2004 P&Z Packet - Laserfiche WebLink

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Marshan Lake Townhomes Review Page 3 July 9, 2004 City of Lino Lakes, Minnesota 6. Geotechnical information has been provided. The borings and associated report cover a larger area that extends beyond this proposed development. However, the same general comments apply and can be summarized as follows: Additional excavation of fine alluvial silts and replacement with compactable granular material may be required for construction of the buildings and private drives. Groundwater levels may also necessitate dewatering for the utility installations. Any imported topsoil, fill material, or granular materials for roadway and building foundation (material and source) must be approved by the City Engineer. 7. The plans provide building elevations. The lowest floor elevations must meet City of Lino Lakes requirements with regards to separation from adjacent high water elevations and groundwater levels. Based upon the geotechnical information provided, the elevations are acceptable. 8. The preliminary plat provides for standard drainage and utility easements (10 feet in width) around the perimeter of the property as required. In addition, 44 foot wide drainage and utility easements covering the two private driveways are also provided. It is recommended that the driveway easements as shown also be dedicated as access easements in addition to the drainage and utility dedication. 9. All utility work shall be performed in accordance with the City of Lino Lakes, City Engineers Association of Minnesota (CEAM) Specifications, and City of Lino Lakes building permit requirements. Water pipe and appurtenances shall meet the requirements of the City of Lino Lakes, and as follows: Hydrants - Waterous Pacer WB -67; Valves - Mueller A2370 -20 or equal. DIP pipe shall be Class 52. All sanitary sewer service pipes shall be SDR 26 or Schedule 40. The location and number of hydrants will be subject to the review of the City Fire Chief. Safety and traffic control during construction must be provided in accordance with the State of Minnesota Manual of Uniform Traffic Control Devices (MUTCD). 10. Revisions have been made to the Utility Plan (Sheet 6 of 11) as follows: A. The watermain loop through the site has been sized up from 6 -inch diameter to 8 -inch diameter per City of Lino Lakes requirements. B. The revised Utility Plan provides for revisions to main and service connections that result in fewer excavations into the existing street (Aqua Circle). This is accomplished by utilizing more of the existing services, and by extending water and sewer mains parallel to Aqua Circle within the boulevard to serve the northerly 4 properties. This normally would not be a concern except that the 8 -inch watermain loop would now connect to 4 -inch lines at each end, and the 8 -inch sanitary sewer mains would connect to existing 6 -inch services. Standard practice generally discourages larger diameter pipes feeding into smaller diameter pipes. In addition, the condition and grades of these existing services would require verification of their adequacy at the time excavations are made. The City will not allow any main line utility extensions from the existing 4" service stubs. The existing 6" stubs can be connected to with 8" lines. The sanitary sewer extensions must have a manhole as the connection. No sanitary sewer main line cleanouts will be allowed.