2018-11-1_PR Comm Packet - Laserfiche WebLink

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Condition Assessment of Guidant John Rose Oval General Introduction The city of Roseville is seeking to better understand the current condition of the fundamental systems of the 25-year-old Guidant John Rose Minnesota Oval (Oval), formerly the John Rose Minnesota Oval, outdoor skating facility. The facility was originally designed and constructed to accommodate speed skating and bandy, both of which at the time needed a reliable skating facility to call their home. The facility has been operating for approximately twenty-five (25) years from mid-November to early March since December of 1993. Most of the outdoor components are original except for some minor replacements. A few improvements have been made to the support areas adjacent to the facility, however, for the most part, the facility operates as originally designed. A snowmelt pit was added in 2010, brine pumps and headers were replaced in 2005 along with the re-tubing of the chiller vessel. All the refrigerated rink piping and transmission mains are original along with the screw compressors and the evaporative condenser. One condenser water pump was replaced, and the brine pumps have been serviced and maintained but otherwise are original. The rink and surrounding infrastructure and surfaces including lighting, seating and skate friendly surfacing is original however the electronic scoreboard has been replaced. The condition report was developed from many inspections of the refrigeration plant equipment, refrigerated rink surfaces, and surrounding surfaces. Numerous discussions between City Staff and Stantec ice experts were conducted to establish the relative condition and remaining life expectancy of the facilities systems. The condition assessment then served as a basis for determining a prioritized capital improvement program and appropriate budgets and schedules for needed replacements and repairs. The capital improvement plan includes scheduled improvements, budget requirements, recommended testing procedures, and necessary construction or technology changes to improve energy efficiency and modernize overall operations of the system. The ice system was originally installed by Commercial Refrigeration, a Minnesota-based company, and includes an ammonia, indirect-refrigeration plant using calcium-chloride brine for the rink-cooling loops. The rink-refrigeration piping and transmission mains are fusion-welded polyethylene piping and tubing, imported from Sweden, which was the first use of this type of fusion welded material for ice rink refrigeration systems in North America. Fusion welded polyethylene piping is now the standard for ice rink construction. Condition Assessment General The Condition assessment was completed from the fall of 2017 to spring of 2018 allowing observations of the facility from dry floor summer activity through to the end of the ice skating season. This allowed for observation of system performance on the shoulder seasons, when the refrigeration system was most challenged as well as the transition period from dry floor to ice and ice out. Photographs and notes 101010