04/13/2005 P&Z Packet - Laserfiche WebLink

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Marshan Meadows 3 March 28, 2005 City of Lino Lakes, Minnesota site conditions and construction requirements. Any imported fill to the site must be approved by the City Engineer. Grading and Drainage Drainage calculations were provided for the previous review, and comments were provided as follows: • • 1. An emergency overflow location and elevation must be provided and shown for the north infiltration basin. This is necessary to ascertain that the low floor and low building opening elevations provided meet requirements. Based upon the elevations provided on the plan, it would appear that the lowest opening elevation on at least some of the housing units do not meet the minimum requirements. A summary of the requirements are as follows: The lowest floor elevation must be at least 4 feet above normal water elevations (including groundwater), and at least 2 feet above the project 100 -year elevation. In addition, the lowest building opening must be at least 1 foot above the emergency overflow elevation. 2. An application must be made to the Rice Creek Watershed District (RCWD), and a copy of the application provided to the City. The plans shall therefore be subject to any further conditions and requirements of the RCWD. Final approval by the City shall be conditional upon approval of RCWD. 3. Proposed condition curve numbers shall use NRCS type "B" soil in all disturbed areas where NRCS type "A" soils exist under existing conditions. 4. City rate control requirements provide that the proposed 1, 10, and 100 year discharge rates not exceed the existing 1, 10, and 100 year discharge rates. The 1 and 10 year information must be submitted. 5. The infiltration basins shall be planted with native grasses and plants. The City of Lino Lakes has a specification for plantings which shall be referred to or included in the plans. Utilities The utility plans as provided are not considered to be complete for construction purposes. Pipe sizes, slopes, profiles, construction details, etc. must be provided. Further comments will be provided upon the receiving of full construction plans. The proposed 8 -inch watermain for the proposed development is shown connecting directly to the end of the 12 -inch watermain crossing stub. A reducer and valve will be required at the connection point. However, in consideration of possible future extension of main along the east side of Lake Drive, it is instead recommended that the 8 -inch main be connected to a cross that also provides for future 12 -inch extensions to the north and south as may be required in the future.