2010-10-13 CC Packet - Laserfiche WebLink

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City of Centerville Downtown Strom IMerfi6CIRM,9tiOn Page 2 1014110 FUS'ke It is imperative that the City understand the inherent risks with any first-of-its-kind project. While the design will mitigate these risks to the extent practical, we cannot eliminate them or assume their associated liability. Noise The large gun style heads are, perhaps, noisier than a traditional irrigation system. Neighboring homes may find this noise to be unacceptable, especially given the intended hours of operation (early morning hours before dawn). Everyone who attended the live demonstration of the irrigation, head was able to hear the noise produced. Our scope of services does not include a, noise study. The City will need, to determine whether or not neighborhood noise complaints are an acceptable risk. Vandalism The system will have permanently mounted, above ground, irrigation head and valve components. These items will be exposed and on City park land which is open to the public. While those of us at the live demonstration were able to observe the robust nature of many of the product components, some parts were a bit less sturdy and may be susceptible to vandalism. The concern here would be the operation of the heads (under high flow and pressure conditions) if they were to be damaged or altered by vandals. Sorav Head Discharge The irrigation head being considered will operate at high flow and pressure, shooting nearly 500 gallons per minute (gpm) through a one and a half inch nozzle at 100 pounds per square inch (psi) resulting in a very high velocity, concentrated flow of water. Direct contact with this stream of water could be dangerous to the welfare of any human or animal, especially children. While the intent is to mount the spray heads six feet or more in the air to avoid contact, there is always the possibility someone could come into contact with the stream either purposefully or by a malfunction, of the spray head. The City will need to determine if this is an acceptable risk, list During the live demonstration, there was a slight breeze of maybe 10 mph or so. Mist from the irrigation stream was observed migrating several hundred feet onto nearby houses, cars, and lawns, LaMotte Park is surrounded by residential homes on its East, South and West boarders and by a church to the north. Depending on wind conditions, all of these structures could be affected by drifting mist from the spray stream. Given the fact that we will be utilizing storm pond water in this system, there is the possibility for complaints regarding odor and/or regularly having a home, vehicle, or landscaping covered in heavy moisture. The city will need to determine if this is an acceptable risk. 17