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ELK RIVER ARENA <br />ELK RIVER, MINNESOTA <br />APRIL 8, 1998 <br /> <br />FEASABILITY STUDY <br /> <br />REVIE~V OF THE EXISTING ARENA MOISTURE PROBLEMS: <br /> <br />We recently visited the site and discussed some of the moisture problems with the arena <br />manager, Mr. Rich Czech. The following items were discussed during our visit: <br /> <br />1. Condensation forms on the roof deck above the ice sheet. Water droplets form on the <br /> metal deck and drip down onto the ice sheet. This creates several problems. <br /> <br /> a. The water droplets collect on the ice sheet where they are frozen by the ice sheet <br /> refrigeration system. During unoccupied periods of operation the condensation <br /> builds up and forms stalagmites on the ice surface. Rich stated that this occurs <br /> very frequently during the summer months. The arena operators need to scrape <br /> the stalagmites off the ice surface and resurface the ice before the arena can be <br /> used. This adds a considerable amount of maintenance time to the operation of <br /> · the arena. <br /> <br /> b. The water vapor that collects on the metal deck creates rust that will quickly <br /> deteriorate the roof deck. The rust is clearly visible from the ground and is <br /> especially visible on the metal surfaces near the outside air intakes into the arena. <br /> <br /> c. The condensation that is frozen on the ice surface forms a layer of frost on the ice <br /> surface. The process of freezing the condensation into frost places increased load <br /> on the ice plant, increasing the operational costs of the system. As the frost <br /> builds up on the ice surface, the thickness of the ice grows. This reduces the <br /> efficiency of the refrigeration system increasing the operational costs of the <br /> facility. <br /> <br />2. Condensation will form on any surfaces that are below the dew point temperature of the <br /> air. Many of the surfaces may not be visible. We are concerned that condensation may <br /> be occurring in sheet rock walls, on the building structure, on the concrete floors, on the <br /> metal bleachers and on the building electrical components. The condensation will <br /> continue to form and deteriorate the building systems and may cause serious problems. <br /> <br />NELSON-RUDIE & ASSOCIATES, INC. Page 2 <br /> <br /> <br />