10/12/1994 P&Z Packet - Laserfiche WebLink

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Ms. Mary Kay Wyland Planning Coordinator City of Lino Lakes September 29, 1994 Page 2 4. As part of the Wenzel Farms Townhome project (located to the west of the Marshan Lake Townhome project), an eight -inch watermain stub was constructed on the west side of Lake Drive at Aqua Lane. This eight -inch watermain stub should be connected to the Marshan Lake Townhome water system to provide increased water pressure, flow and system reliability (this will require jacking across Lake Drive). Storm Sewer 1. The developer's engineer should provide OSM with the preliminary internal storm sewer system calculations for review. The internal storm sewer system should conform to the requirements of the City of Lino Lakes' Local Water Management Plan. Some of the items listed in the Local Water Management Plan that will affect the Marshan Lake Townhome project are listed as follows: Ponding areas around urban construction shall be designed for the 100 -year, 24-hour, Type II rainfall distribution. Minor drainage systems shall be designed using a 10 -year frequency rainfall. The permanent pool volume in the sediment basin should be greater than or equal to the volume of runoff from a 2.5 -inch rain storm. The sediment basin located on the west side of Stagecoach Trail does not meet this requirement. 2. The spot elevations shown in the storm water outlet ditch, located along the north property line, reflect backflow and will need to be revised. 3. The plan will need to be revised to provide adequate cover over the proposed storm sewer line which drains from the 24 -inch Lake Drive culvert to the outlet ditch in the park area along the north property line of the Marshan Lake Townhome Project. 4. Along with the reconstruction and widening of Aqua Lane, storm sewer will be required to pick up surface runoff along Aqua Lane. 5. The grading shown for the driveway located on the north side of Block 12 will require that storm sewer be constructed in this area to accommodate the storm water drainage. Streets 1. The main entrance into the Marshan Lake Townhome Project will be Aqua Lane. Currently, Aqua Lane is a 24 -foot wide bituminous rural section roadway. This section of Aqua Lane will not be able to accommodate the projected traffic demands for the Marshan Lake Townhome Project. We recommend reconstructing the section J:\5521.00\CIVIL\CORRES\092994.MKW