Agenda - Parks and Recreation Commission - 01/10/2002

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required to have a ~ading ce~i~cate showin_~ that the actual grade conforms to the approved ~ading plan prior to an occupancy pe,..-ni~ being issued. The existing ~ading plan needs to be revised so ~at elevations are listed at each lot corner. The grades along the rear lot lines ,~'?Lots 9. I0. il: 12, 22. and 23 of Block 4 as welI us lots I8, i9 and 20 ofBIock 5 are . ~accepmbiy ~Sa~. Toe minimum slope needs to be no .toner than one percent. Anoka County highway policy states that the discharge of stormwater to the county highway ditch along CSAH 5 should be no ~eater th. at predevelopment conditions. Special attention should be directed tO the runoff from tow~ouse un_its 22 thru 35 of Block 5 to make sure that they comply with Anoka County policy. _. The plan also proposes steep grades along the sedimentation pond and wet/and in the southeast portion of the development. Mmximum ~ades adjacent to water bodies are six horizontal to one vertical. Some o~' the slopes are nearly twice this steep. R. etaining walls or special landscape measures should be considered to reducing these slopes or minimSzMg the erosion potential of these areas. During the Plarmi~g Commission public hearing held in June 2001, a resident was concerned with the location oft.he northwest drainage pond. The PlamqSng Commission, as a condition for approval, instructed the developer to work with the resident at finding other solutions in regards to the location of the northwest drainage pond. The pond proposed is the same shape and location as was considered previously. The sedimentation pond located on portions of Lots 12, 13, and 14, Block 3 is problematic : from several perspectives. The required ~ading will result in steep bac!cyard slopes that will' exceed the maximum allowed slopes. This gradNg will require the destruction of a desirable forest to accommodate the sedimentation pond. Finally, a portion of the pond is proposed to be located on land wkich is to be dedicated as parkland. Staff would suggest that the developer discuss with the City. the possibility of relocating this pond to an alternative location to the south and east. Utilities and Water Usage: The development will be Served by municipal water and sanitary sewer.. Sanitary, sewer is available on the southern border of the site and'watermaln is available along CSAH 5. A preliminary utility plan has been submitted for review. The plan is generally acceptable. Detailed consmuction plans will need to be submitted and reviewed by the City Engineering Department. The developer will need ro pay the standard trunk charges associated with these utilities. A utility plan has been submitted and is generally acceptable with the following corm-neats; Watermain on cul-de-sacs may be reduced from eight inch pipe to six inch pipe; 2) The apara-nent building should be looped between Dysprosium Street and the eastern most town_house watermain. This will provide two sources of flow to the apartment building; 3) ~au~ eight inch waterline should be extended between Lot 6 and 7 of Block 5 to provide future service to Fluorine Street.