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Staff has been worl�ing to outline costs, opportunities, risks/challenges in order to formulate a <br />decision point. At this time not enough information is available, but it appears too early to <br />discount the geothermal technology as it applies to the Roseville Arena. Preli�ni�ary <br />indications are that a potential ant�ual savings of $40,000 may be realized if converted to a <br />geothermal technology. What is not known at this ��� is the conversion costs vs payback <br />time and functionality. A very rough beginning analysis includes the following categories and <br />bullet points: <br />Financial <br />Advantages <br />� Potential savings of up to 40% of electricity and natural gas costs <br />• Potential Xcel energy grant opportunities <br />+ Potential of heating and cooling the Skating Center and other campus buildings <br />� The daily rrrain�enanc�/aperatian is expected to be less <br />Disadvantages <br />• The increase in � ��frx,�,t cost of installation <br />Ice reliability — can it meet our summer demand usage <br />Opportunities <br />�� May be the fiYture of ri�c technology <br />• Environmental benefits — Polypropylene vs Freon <br />� The geothermal technology is consistent with the City environmental approaches <br />Use of earth energy <br />* Financial savings - incorporating the OVAL. — using excess heat for heating and <br />cooling entire City Hall campus (future planning) <br />Risks/Challen�es <br />• The replacement <br />components have <br />life. <br />project has been delayed for several years and although the <br />been maintaiYed to the highest standaxd they are past their �ase�ul <br />• Due to the age of existing equipment there is always a potential for a mechanical <br />failure resulting in downtime of the arena (loss revenues, public relations, expense for <br />1:emporary/pertnanent fixes, etc.) <br />• Does it work s ciently in our situation, will it maintain the ice at acceptable levels <br />year around <br />* A11 nnks using this technology are new nnks. There are no conversion rinks at this <br />time (Rochester, Albert Lea are lool�ing at conversion too) <br />Feasibility Stud,y <br />� Staff suggest a stringent feasibility study to verify numbers, components and analyze <br />all of the above (start now) <br />�'relizz�uaary numbers have been received but not verified on the potential savings. Reliable <br />numbers have not yet been received on tne conversion costs. If the City continues to consider <br />�► Page 2 <br />