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MINUTES OF THE ORONO CITY COUNCIL MEETING Monday, October 10, 2016 7:00 o'clock p.m. 11. #16-3855 ERIC AND ANDREA LARSON, 690 BROW ROAD NORTH, SCOTT AND JEANNE MABUSTH, 740 BROWN ROAD NORTH — SKETCH PLAN REVIEW (continued) McMillan asked what kind of maintenance the sand iron filters will need in the future. '_Nelson indicated they are predicting 25 to 30 years lifespan for those. McMillan asked if there is any annual maintenance required. Nelson stated they would require some cleanout periodically. McMillan asked if they have been in existence for a while. Nelson indicated they have been in use for five to ten years and that the sand benches have been found to be the best for phosphorus removal. Goodrum stated he has been doing conservation planning for 30 years and that he has traveled with the DNR across the state promoting conservation development. Goodrum noted Carver County is now requiring the iron filtration. Goodrum noted their plan proposes an 87 improvement in phosphorus removal compared to MCWD's 25 percent, which is a huge difference. Goodrum stated meeting the goals of the management plan is their number one goal and that they can exceed the standard goals with new technologies. Goodrum displayed a color rendition of the types of homes that would be constructed on the site. Goodrum stated the property has been zoned and guided for single-family. Goodrum noted they are not attempting to cram a bunch of homes on the site and that it complements the surrounding area. Goodrum stated he would like to now address a couple of points addressed in Staff's report. Goodrum noted the property has been guided and zoned for two -acre single family, with two acres typically being needed for stormwater prevention and septic sites. Goodrum noted they do not require two acres since the lots will be utilizing city sewer and water but that they will not be asking to rezone it to a higher density. Goodrum stated as it relates to lot size, rezoning it to an RPUD will allow a mixture of lot sizes on the site and that an RPUD is already considered by the City as an acceptable type of development in certain areas. Goodrum stated in their view RPUD is acceptable for this site. Point No. 3 in Staff's report relates to the 250 feet from the creek or the ordinary high water level. Goodrum noted they are proposing two acre lots within the 250 -feet, which meets the City's code requirements, and that the only exception is slicing off the swimming pool. Goodrum indicated they are okay with it being a public road as well as the 10 percent private recreation area. Goodrum stated overall they are meeting City Code requirements. McMillan stated she had a question about enhancing the creek and wetlands in the less dense areas. McMillan asked what is being proposed for the less dense areas for enhancements. Goodrum pointed out in the northwest corner there is a large wetland area which is currently degraded Page 14 of 26