Minutes - Public Works Committee - 04/18/2000

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this area. He added that an inlet pipe could be added to drain the water to a nearby wetland. City Engineer Jankowski explained that the waiting period would be cut down from 5.25 days to 1.75 days through these methods. He noted the City Council would need to determine if they wanted to keep the residents from flooding or offer them an outlet for the extra water. Councilmember Connolly asked if pipe freezing would be a concern. City Engineer Jankowski stated this would be the same as any other pipe throughout the City and has not been a concern. He stated staff recommends Option B, providing an outlet from the pond to the nearby wetland, but also includes a new storm pipe in 149th Avenue, which becomes the main outlet to remove the water from the wetland complex. He noted this option has a total project cost of $125,000 with the elliptical piping. City Engineer Jankowski indicated $192,000 was budgeted by the City Council for this pond. He stated the chief benefit of Option B over Option A is that it reduces the period of elevated water level in the wetland from 5.25 days to 1.75 days. City Engineer Jankowski stated this solution would not remove all water from lawns in this area but would remove the water more quickly over the days following rain storms. He stated he feels it is well worth the City's funds to remove excess water in a timely manner. Director of Public Works/Fire Chief Kapler stated Option B would affect fewer people than Option A because water would not be funneled to another neighborhood. He explained he was in favor of the improvements and noted they were worth the expense so this neighborhood is not flooded. Commissioner Connolly asked the life expectancy of the pipes. City Engineer Jankowski stated the cement pipes would last 50 to 60 years with routine maintenance before any major work would be needed. Chairperson Zimmerman asked how the grade was changed so greatly to create the flooding situation. City Engineer Jankowski stated the developer's original grading plans were approved by the City, but that the grade was changed in the process of building these homes or by the homeowners themselves. Motion by Councilmember Connolly, seconded by Chairperson Zimmerman, to recommend the City Council approve Option B, providing the same outlet from the pond to the wetland, but also include a new storm pipe in 149th Avenue, which becomes the main outlet to remove water from the storm pond to the wetland complex with the total cost totaling $125,000. Motion carried. Voting Yes: Chairperson Zimmerman and Councilmember Connolly. Voting No: None. Public Works Committee/April 18, 2000 Page 4 of 6