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11/19/18
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11/19/18
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City Planner Anderson stated that he does not have definitive figures. He stated that the soil will <br /> have more structure to it because of the increase in sand which will provide additional opportunity <br /> for infiltration and reduction of that sogginess. <br /> Board Member Hiatt asked for information on the test sites in Brookfield. <br /> City Engineer Westby provided background information on the test sites in Brookfield as well as <br /> soils used by other communities such as Monticello and Big Lake. He stated that ground would <br /> be less saturated and soggy using the new proposed topsoil. <br /> Board Member Hiatt stated that if something is going to be changed, he would want to ensure that <br /> enough is being done to provide better infiltration to get the water back into the aquafer. He stated <br /> that perhaps there can be quantifiable data that would show the comparison of infiltration between <br /> the current topsoil requirement and the newly proposed topsoil. <br /> City Engineer Westby stated that the once the topsoil mix is completed, it can be tested to provide <br /> that infiltration rate information. <br /> Board Member Fetterley stated that her concern would be whether the City is currently doing a <br /> better job protecting the aquafer using the current topsoil requirement compared to other <br /> communities. <br /> City Planner Anderson stated that he does not have comparable data of water use over time for <br /> other communities. He stated that the City has already amended the zoning code to state that if an <br /> irrigation system is going to be installed it must include some form of water efficient technology. <br /> He was unsure if other communities have enacted similar regulations. He stated that he could <br /> request water usage data from the other communities to determine if their topsoil standard has had <br /> an impact. <br /> Chairperson Valentine commented that this was a great presentation that clarifies the parameters <br /> of the issue. He stated that at some level there needs to be an effort to quantify the value that is <br /> being received from the systems put in place to conserve groundwater. He stated that Ramsey has <br /> residents on municipal water and residents that have their own wells and therefore there is a need <br /> for different education materials for those residents as both impact the aquafer. He stated that he <br /> would support the staff recommendation to change the topsoil requirement and beyond that there <br /> is a broader framework that needs to continue to be looked at as there are many dimensions to this <br /> topic. <br /> City Engineer Westby stated that from a cost-benefit side, implementing a soil moisture sensor <br /> provides a savings of about $200 to a homeowner in water savings in the first growing season, <br /> which pays for itself within that first year. He stated that staff is attempting to provide infiltration <br /> to recharge the aquafer and the lower organic content will provide additional infiltration <br /> opportunities. <br /> Board Member Moore asked if there has been any talk about whether it would be beneficial for <br /> different parts of the City to have different soil requirements because of the different soil <br /> conditions that exist throughout the community. <br /> Environmental Policy Board/November 19, 2018 <br /> Page 3 of 5 <br />
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