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City Council Study Session <br />1/22/07 DRAFT Minutes Pg �.1 of 21 <br />t Agenda Items 7 and 8 as they respectively related to alternative energy <br />�� sources at the Roseville Skating Center, and consideration of Park <br />� Dedication Fees. <br />� <br />� Mr. Brokke reviewed geothermal technology as it applies to ice arenas; <br />�� provided preliminary estimated cost comparisons and projected annual <br />� savings between conventional replacement of the refrigeration system and <br />� geothermal technology; and installation dates and expected life expectancy <br />{� of various components of the refrigeration system. <br />1� <br />1� Mr. Broltice noted that, on September 18,2006, the City Council authorized <br />1� by agreement with Stevens Engineering development of plans and <br />1� specifications, and advertisement for bids for replacement of the indoor ice <br />�� arena piping system and other related components considered at the end of <br />1� their useful life; but as a result of further geothermal technology research, <br />��� the conventional replacement method had been temporarily placed on hold <br />l� and the Stevens Engineering contract had not been engaged. <br />,� <br />7� Discussion included risks involved in lesser known geothermal technology; <br />��� replacement of an existing conventional system versus installation in new <br />�� construction; need to revise component costs for an "apple to apple" <br />�� comparison; other rinks and organizations having installed geothermal <br />��� technology in new construction; lack of research available for conventional <br />�� systems with geothermal retrofits; and water heater costs. <br />�� <br />��� Mr. Brokke addressed basic questions for Council consideration, as detailed <br />�� in the staff report dated January 22,2007. Other critical questions identified <br />�� by Mr. Brokke included: Are these estimates realistic? 2) Can we maintain <br />�� quality of ice required? 3) Overall, will this technology work in our <br />�� situation? 4) Overall, will the benefit outweigh the cost? and S) Will <br />�] additional modifications need to be done to existing equipment (i.e., roof <br />�� tops). <br />�� <br />3�� Further discussion included well drilling and installation of horizontal fields; <br />�� tours at various rinks using this technology; possible next steps, including <br />�� contacting Engineering firms to conduct a thorough feasibility study, noting <br />�� that this may conclude recommendations to move forward with the <br />:�� conventional method or may conclude that geothermal technology will be of <br />�� great benefit to our situation; proposed feasibility study to include: arena <br />�� (primary); Future OVAL (secondary); future City �a�l Campus (secondary); <br />