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Findings/Recommendations - Relocating NNG pipes is not a cost-effective option and is not recommended by Staff. <br />Option 3: Re -grade ditch south of 164th Lane, build berm north of 164th Lane within ROW, replace culvert <br />under 5800 164th Lane driveway, add culvert under 164th Lane <br />This option is depicted in the attached plans and includes filling in the front of the swale at the back edge of the <br />ROW north of 164th Lane. The south invert of the existing 164th culvert (874.5) is the controlling factor on the <br />potential depth of water in the low area of the ditch in front of 5751 164th Lane. The depth is 0.3-feet or 4-inches. <br />Findings/Recommendations — Since this design provides an alternate route for stormwater runoff and an additional <br />7-inches of storage in the low area of the ditch, the risk of runoff entering and flowing through the swale on the <br />private property is greatly mitigated. However, if runoff does overtop the ditch it will run through the existing swale <br />in the yard since this project does not propose to fill that swale. This would not occur except during a very large <br />storm event or during a significant snow melt event. Staff recommends this option. <br />Action: <br />Adopt Resolution #20-176 approving plans and authorizing Requests for Quotes for 5751 164th Lane Drainage <br />Improvements, Improvement Project #19-17. <br />Resolution 20-176 <br />19-17 Final Plans <br />Attachments <br />Form Review <br />Inbox Reviewed By Date <br />Kurt Ulrich Kurt Ulrich 08/20/2020 02:28 PM <br />Form Started By: Bruce Westby Started On: 08/17/2020 11:39 AM <br />Final Approval Date: 08/20/2020 <br />