Agenda - Council - 06/10/2003 - Laserfiche WebLink

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A. Streets and Storm Drainaqe There are no existing streets in the project area. A storm water management study was performed last year as a part, of the evaluation of how to develop the City Hall Campus and the adjacent private properties. That evaluation recommended several detention basins within the project area to be built by the private development when that occurs. However, about 40% of the area drains toward the existing developments adjacent to the project area. Therefore, the storm drainage system for this project must be coordinated with the proposed storm drainage system in the other two projects and also share in the cost of those systems in some manner. Without the provision of detention basins, on and off site, and the provision of an underground storm drainage system, this project area and the neighboring subdivisions will experience increased flooding. B. Water System The existing houses located along the east side of Nowthen Boulevard have individual wells. There is a 12" water main that runs from the City Hall Campus due east to the stubbed end of 152nd Lane in the Brandseth Subdivision. C. Sanitanf Sewer System The existing homes have individual septic tanks. There is an 8" sanitary sewer .that runs parallel to the t2" water main from the City Hall Campus due east to the stubbed end of 152~d Lane in the Brandseth Subdivision. 4.0 PROPOSED IMPROVEMENTS A. Streets and Storm Drainaqe The City's existing aerial topography was used to develop existing and proposed profiles of the streets and identify the current drainage patterns. Existing conditions, including location of existing storm drainage culverts, were verified in the field. The proposed street pavement is a seven- (7) ton class with-mountable concrete curb and gutter, thirty-two (32')feet width to back of curbs. The underground storm drainage system will be designed to carry the 10-year storm flowing full. The Lower Rum River Watershed Management Organization will require storm water runoff from the project and other contributing areas to be pre-treated prior to discharging to the wetlands and eventually to the Rum River. Page 3 G:!Munici~altARAMSEY\3168\RA3168FSR.doc I ! I I I I ! ! i I I I I ,I I i I I I