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HomeMy WebLinkAbout2020-2990() Stantec January 23, 2020 File: 193885208 Attention: Kevin Hansen Public Works Director 637 381h Avenue NE Columbia Heights, MN 55421 Stantec Consulting Services Inc. 733 Marquette Avenue Suite 1000, Minneapolis MN 55402-2309 Reference: Huset Park Stormwater Management and Harvesting System Preliminary Report Dear Kevin, In our September 18, 2018 meeting, you indicated that the City of Columbia Heights would like to plan for potential irrigation improvements to one or two of the fields in Huset Park, using water from the existing Zurek Pond. In subsequent discussions with you and with Doug Snyder, it was indicated that the Mississippi Watershed Management Organization (MWMO) would have an interest in building on this project to improve water quality as well as reduce flooding issues downstream in Minneapolis. As a first step, the City needs to determine the feasibility and desirability of this project. Staniec proposes to assist the City in this effort by preparing a preliminary report that evaluates stormwater management options, provides an initial recommended design concept, and estimates the cost of this potential project. Options to be evaluated include: •Pumping from Zurek Pond to irrigate the fields •Providing a pond outlet that could draw down the Zurek Pond level, thereby increasing the effective flood storage. It is our understanding that expanding the pond size is not an option, due to space constraints within the park. •Providing additional pond storage in Huset Park at a location other than Zurek Pond •Providing a filtration bench along the pond, enhanced with iron filings to remove dissolved phosphorus, and potentially including a recirculating pump in a pump station The tasks to prepare this preliminary report will include: 1.Stormwater Modeling. Stantec will build on the MWMO's XPSWMM model of the area to create a model of the drainage area, including Huset Park and Zurek Pond, to a downstream outlet point at 5th Street NE and Columbia Way in Minneapolis. The model will be used to estimate existing flooding conditions in the residential area northeast of the 5th StreeUColumbia Way intersection as well as various flood control options. The primary flood control options include drawdown within Zurek Pond and additional flood storage within Huset Park. Staniec will use the XPSWMM model to evaluate the effectiveness at reducing flooding in the downstream residential area in Minneapolis. Drawdown in Zurek Pond will assume Design with community in mind 2020-2990