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5. 1. <br /> Public Works Committee <br /> Meeting Date: 09/19/2023 <br /> Primary Strategic Plan Initiative: Not Applicable <br /> Title: <br /> Review Drainage Concerns at 5725 180th Lane NW <br /> Purpose/Background: <br /> Purpose: <br /> The purpose of this case is review drainage concerns of the property owners at 5725 180th Lane NW. Staff <br /> will also present and discuss optional improvements to address their concerns and will seek direction for <br /> further action. <br /> Background: <br /> The property owners at 5725 180th Lane NW, Scott and Lisa Monserud, shared their drainage concerns with <br /> City Staff during the design and construction of City Improvement Project#19-01, Ford Brook Estates Street <br /> Reconstructions. In summary, they purchased this property over 25 years ago and have had concerns about <br /> stormwater runoff backing up into the property from the drainage ditch located within City right-of-way <br /> along 180th Lane. <br /> When the street was reconstructed in 2019, minor drainage improvements were completed as part of the <br /> project. At the time staff informed the property owners that if they wanted the City to address their drainage <br /> concerns in greater detail following completion of the project Staff would explore options and present them to <br /> the Public Works Committee for review and consideration of further action. <br /> Staff has since identified two primary options. <br /> 1. Option 1 - Fill the swale in between the ditch and the shallow pond east of their home that allows water <br /> to back up onto their private property. If this option is pursued the fill would have to be designed to <br /> allow runoff from the back yard to drain south into the drainage ditch unimpeded. Estimated costs for <br /> this option could approach $25,000 depending on the scope of the work. <br /> 2. Option 2 - Construct an underground storm sewer system to direct runoff from the ditch to Ford Brook. <br /> Estimated costs for this option total $183,000 if completed as a City Improvement project. Below is a <br /> cost breakout. <br /> Option 2 estimated project costs - <br /> 48" Inlet Structure w/HC casting $ 10,000 <br /> 4 x 48" Storm MH w/casting $ 301000 <br /> 18" Flared End Section w/grate $ 31000 <br /> 650 LF 18" RCP $ 6000 <br /> 2 Driveway remove & replace $ 6,000 <br /> 83 LF Culvert Removal $ 11200 <br /> 0.25 Acre Seeding $ 11500 <br /> 15 5 CY Topsoil $ 81000 <br /> Erosion Control $ 11200 <br /> Traffic Control (TH 47) $ 500 <br /> Mobilization $ 15,000 <br />