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Melanie Curtis From: Melanie Curtis Sent: Tuesday, January 13, 2015 9:58 AM To: 'Courtney Hall'; twrenard@yahoo.com Cc: Amanda Bednar Subject: RE: RE Orono Ice Arena - 1025 Old Crystal Bay Rd N Tom - Please feel free to call me to set up a time to discuss any City of Orono permitting or approval processes so your project planning stays on track. - Melanie , CcAr\ PS: Courtney-thanks for keeping me in the loop. — �� s`'-,�'�C Qc) Melanie Curtis Vitvi5 - v5titt Direct 952.249.4627 Planning &Zoning Office 952.249.4620 2750 Kelley Parkway, Orono, MN 55356 Email: mcurtisaci.orono.mn.us Website: www.ci.orono.mn.us From: Courtney Hall [mailto:Chalk minnehahacreek.orq] Sent: Tuesday, January 13, 2015 9:07 AM To: twrenard@yahoo.com Cc: Melanie Curtis; Amanda Bednar Subject: RE Orono Ice Arena - 1025 Old Crystal Bay Rd N Good morning,Tom- Thank you for talking to me about the future Orono Ice Arena project. Based on a preliminary evaluation without a formal or complete application,the project appears to trigger Erosion Control,Wetland Protection, and Stormwater Management rules. Other rules may be found to be triggered as additional information is submitted and reviewed. Stormwater Management: http://m innehahacreek.org/permits/full-mcwd-rules/stormwater-management-rule 1. This project will trigger our Stormwater Management rule as the proposed project will likely result in an increase in impervious surface.The project will be considered "redevelopment" as the project will create new impervious surface. A stormwater management plan will need to be submitted to the District.The treatment requirements of the rule will depend upon the amount of site disturbance and impervious surface created. a. For example, for sites that are greater than one acre and the proposed activity disturbs less than 40 percent of the site and results in an increase in impervious surface of less than 50 percent,the phosphorus control requirements of subsection 3 (a), rate control requirements of subsection 3(b) and volume control requirements of subsection 3(c) apply to the area of increased impervious surface; b. For sites that are greater than one acre and the proposed activity disturbs 40 percent or more of the site, or results in an increase in impervious surface of 50 percent or more,the phosphorus control requirements of subsection 3(a), rate control requirements of subsection 3(b), and volume control requirements of subsection 3(c)apply to the entire site's impervious surface. Wetland Protection Rule: http://minnehahacreek.org/permits/full-mcwd-rules/wetland-protection-rule 1. According to the District's FAW,there are three wetlands on site.The wetlands to the east of the existing arena and parking lot are classified as Manage 3 wetlands,which require a 20-ft buffer.The wetland to the south of the arena is classified as a Manage 1 wetland, which requires a 40-ft buffer. Wetland buffers are a naturally vegetated, no-mow area. 1