08/02/88 Public Hearing 7:41 - Laserfiche WebLink

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Mr. Otter indicated on a map the area to be involved with the vertical expansion. Waste Management has entered into discussions with the City as to how Waste Management can accomplish development of a ski/sledding hill along with a borrow area and dedicaiton of a roadway. If this recreational area cannot be constructed for some environmental reason, Waste Management will dedicate another 50 acres to Ramsey for park or recreational use in the future. Dennis Roznowski - Foth and Van Dyke Engineering - Stated that the vertical expansion will essentially entail additional deposits of 635 acre feet of waste over the top of the waste already in place. The bulk of the material to be placed will be in the south and central portion of the landfill. The perimeter areas will have less fill put in them. The vertical expansion will increase the side slopes of the landfill and the overall height increase will be 4 feet at the highest point. In addition to increasing the slopes, diversion berms will be constructed across the slopes to minimize erosion. Once the site has reach it's final grade, a final improved cap will be placed on it. The final cap will include a composite of low permeability soil and an impermeable synthetic membrane. The amount of infiltration into the landfill will be greatly reduced as opposed to the current design. The next project is the soil borrow area. Waste Management is proposing to develop the north 80 north of the landfill. There would be an east and a west borrow area developed separately. Waste Management is proposing to develop the east borrow area first, and then the west. The borrow areas will be developed in a phased approach. Access to the borrow area will be from perimeter access roads of the landfill and there would not be any additional traffic on county roads. The process for the east borrow area would be to remove and stockpile the topsoil, excavate the daily landfill cover and when excavation is down to design grade, the topsoil will be removed from phase 2 and placed on top of phase 1. This process will continue for each of the phases until the entire area is excavated and restored. Once that is completed, the west borrow area would be developed in a similar manner. An elevation of 874 feet has been chosen in order to maintain a 5 foot minimum separation from the highest known groundwater level in this area. The maximum design grade is 1026 feet. The vertical expansion at it's highest point will be 1030 feet above sea level; the original design was for 156 feet and the vertical expansion will bring it to 160 feet. The proposed roadway would serve as an east/west corridor for any emergency vehicles in the area and provide access to the ski hill facility. The roadway involves an 80 foot right-of-way which will be rough graded and the city would be responsible for developing it. The road would have to go through a wetland and a culvert would be required underneath the road to maintain a constant water level on both sides of the roadway. Don Otter - Stated that Waste Management will continue to contribute a percentage of it's revenues from operations at the facility to Ramsey; during the vertical expansion period, the amount of revenue to Ramsey could exceed $2,000,000.00. CITIZEN INPUT John Heinen - 6370 143rd Lane - Inquired as to the time period involved in adding 635 acre feet to the landfill and if it will then close after Planning & Zoning Public Hearing/August 2, 1988 Page 2 of 7