Agenda - Council - 03/14/1995 - Laserfiche WebLink

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Background: The feasibility study for this project was requested by the City Council at their February 14, 1995 meeting. This study was ordered to determine the cost and the feasibility of improving the drai~ge in this area. The area of benefits is contained within the Rum River Drainage District, which encompasses the northern two-thirds of the City. This district has been established for the purpose of funding necessary drainage improvements within the district. At the February 14, 1995 meeting, City CounciI directed the City to proceed with this project under Minnesota State Statutes ChaPter 444. Under this statute, the City will be required to conduct a public hearing notifying all residents in the drainage disu-ict. Exisiing Conditions: · A na~al low lying area, which is identified as Exhibit A of Appendix A, has the potential to affect several outbuildings adjacent to this oxbow wetland and DNR Protected Wetland 659W, the large wetland south of 153rd/t55th Avenue N.W. In addition to these outbuildings, the wetland elevation in 1994 exceeded the ordinary high water elevation designated by the Department of Natural Resources by one foot, which contributed to flooded road conditions on 153rd/155th Avenue N.W. during the spring of the year. Wetland 659 had at one time in the past been provided with an outlet to County Ditch #3 by a privately-constructed drainage ditch. County Ditch #3 in turn flows eastward and ultimately empties into the Rum River. This privately- cons~cted drainage ditch had lost its effectiveness over a period of time due to a combination of factors, including the construction of non-culverted roadways, construction of private ponds, and lack of maintenance of the ditch itself. The area was to have had minor drainage improvements in 1989 in conjunction with the surfacing of 156th Avenue N.W. The scope of these 1989 improvements are described in the feasibility stud7 prepared by Hakanson-Anderson dated February, 1989, which is included as Appendix A. The proposed culvert illustrated in Exhibit B of Appendix A had been installed, however, the minor grading referenced in the report did not occur. In addition, 153rd/155th Avenue N.W. was constructed in 1990 through the area. This roadway was provided with culverts to facilitate the natural drainage. Dur~g 1994, this situation was again brought to the City's attention and in anticipation of resolving this problem, the City has had the low lying area surveyed and a drainage plat prepared to faCilitate.obtaining drainage easements rights for a future drainage project. Such a project will reqmre envn:onmental permits which will not be obtainable until the City's comprehensive storm drainage plan is updated. However, permission has been obtained to allow the scope of the drainage project authorized in 1989 to occur. DesCription of Improvements: The Project proposed would be in keeping with the 1989 goal of removing existing impediments to free Mowing drainage at an elevation above 868.2 feet. The elements being proposed would include the following: I) ~ Lowering a private driveway culvert at 15523 Ramsey Boulevard N.W. 2) ~ Minor excavation of approximately 150 feet in high area north of 153rd/155th Avenue ~ N.W. 3) ~ Removal of filled and high area south of 153rd/155th Avenue N.W. on the Stanley Welch :~ property 4) Placement of two culverts through berms of created pond at 6960 - 156th Avenue 5) i The cleaning of the existing culvert on 157th Lane N.W. I I I I I I I I I I' I I I I I ! I I I