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9. <br />10. <br />11. <br />The grading and increased structural hardcover contribute to the proposed <br />development including a new storm sewer system and drainfield to accommodate the <br />drainage on the site. The size and configuration of the proposed footprint of the <br />house has required a stormwater management plan for the property. The Orono <br />Community Management Plan (CMP 3-13) recognizes storm sewers speed runoff <br />and provide no natural filtration or nutrient assimilation. The Plan suggests storm <br />sewers will only be utilized in local flood prone areas or where there is soil erosion <br />insolvable by natural means. <br />An attached garage requires extensive regrading on the property to extend the <br />existing driveway. The regrading and additional structural coverage for the house <br />have raised concerns about drainage on the property. Applicants have developed a <br />proposed stormwater and drainage plan for the property to handle a one year storm <br />event. Proposed is a storm sewer to be constructed to route stormwater around the <br />residence into a proposed drainfield area. The City Engineer reviewed the drainage <br />plan and had concerns about the drainfield's capacity and long term maintenance. <br />The City Council has considered this application including the findings and <br />recommendations of the Planning Commission, reports by City staff, comments by <br />the applicant and the effect of the proposed variance on the health, safety and welfare <br />of the community. <br />Page 4 of 5