2020 11-17 CC PACKET - Laserfiche WebLink

Home

SEH RuNding a Better World for AN of Us" TO: Justin Gese, City Engineer SEH FROM; Emily Jennings, Water Resources Engineer SEH DATE: October 19, 2020 MEMORANDUM .RE: Gem Lake Dralnage•— Seheunei`nah Road Flobding<and City Wide, Culvert Inspections Sumn'a" ano Next•$teps SEH No; GEMLK 145993 14:00 Background In spring 2019, an unusually. large amount of late winter snow,. rain, airid.an expediteid•meli caused flooding throughout portions of•tho Scheuneman Road. SEH inspected these areas and prepared a memorandum of the observations and. listedsome poteritial solutions-te the drainage concerns. To gain a better understanding of the overall drainage system within the City of Gem Lake,. SEH was hired fly the City of Gem Lake following the spring flooding -at Sc.heuneman Road to inspect culvert crossings. within the. City, including both City owned culverts and privately awned driveway/entrance culverts, At request from the City, inspections were delayedone year and completed in•spr-lhg of 2020, Any. lAspeetiori $timmary, reports, and maps were prepared for the City. The purpose. of this memorandum is to identify some next steps foethe City with a focus on the Schueneman 'Road. Private Culvert Crossings During the 2019 Scheuneman Road site visits; culvert conditions .were not identified due to snow pack. During the city wide culvert inspee tions, each crossing was inspected for the :following criteria: • Structural Condition • Submerged Condition. • Sedimentation • Erosion Generally speaking, culverts throughout.the City of Gem Lake were in. overall.good shape. Tiyoughout the City, the most prevalent of the inspection criteria identified was sedimentation, For the purposes of the inspections,. sedimentation was defined as settled or.dep.osited sediment or other materials. that 6ay:be affecting culvert capacity, entrance, or exit.. Over time, these deposits can often .become disguised as part of lawn or other landscaped areas, Figure 1 •shdWs.thei flooding locationsidentified in the 5.cheu.neman Road Flooding Memorandum with the-CUlvert Inspection Resultsfor,this area, As identified on thefigure; those areas that are not -natural low points, may -have had exacerbated flooding issues due to sedimentation within the private culvert crossings. • Enoineers. [ .Architects I Planners. l Scientists Short Elliott Hendrickson Inc:, 1701 West Knapp Street, Suite.13, Rice Lake. W! 54868-1350 SEH is 100%empiay.ee-owned .J :sehfrmcom 1 715.236.4000 1 800,903.5970 1 88&908.8166taz