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HomeMy WebLinkAboutOshkosh_Stormwater_Management_OverviewCity of Oshkosh Storm Water Management Overview for Storm Water Utility Appeals Board July 15, 2021 Presentation Outline 1.Municipal Code Chapter 14 2.MS4 Permit 3.Flood Control 4.Operations & Maintenance •Storm Water Utility Website: Brown and Caldwell 2 •https://www.oshkoshwi.gov/Storm WaterUtility/ Municipal Code Chapter 14 •Link to Chapter 14 •Resources: •Definitions (Section 14-1) •Storm Water Utility Appeals Board information (Section 14-37) •Quick reference guide Brown and Caldwell 3 •https://www.oshkoshwi.gov/Storm WaterUtility/Storm_Water_Regulatio ns.aspx Municipal Code Chapter 14 •Components •Storm water utility •Construction site erosion control •Post-construction storm water management •Illicit discharge Brown and Caldwell 4 Municipal Code Chapter 14 •Storm Water Utility •Funding mechanism for storm water management •Based on impervious area of parcel •Credits available based on private improvements Brown and Caldwell 5 Municipal Code Chapter 14 •Construction site erosion control •Post-construction storm water management •Peak flow control •Storm water pollution •New development & re- development •City reviews developments for compliance Brown and Caldwell 6 Oshkosh Corporation Headquarters Construction Entrance Menominee Nation Arena Porous Pavement MS4 Permit •MS4: Municipal Separate Storm Sewer System •Permit stems from Clean Water Act •Six minimum measures •TMDL compliance •Compliance activities summarized in annual report Brown and Caldwell 7 Examples of MS4 components •https://www.oshkoshwi.gov/StormWaterUtilit y/MS4Permit.aspx MS4 Permit •TMDL Compliance •Citywide Storm Water Management Plan (SWMP) •2008, 2014, On-Going •City needs to remove TSS and TP from within City •TSS: 20% to 58% •TP: 86% Brown and Caldwell 8 Blue Green Algae –Lake Winnebago (Source: WDNR) MS4 Permit •Six minimum measures 1.Public education & outreach 2.Public participation/ involvement 3.Illicit discharge detection & elimination 4.Construction site runoff control 5.Post-construction runoff control 6.Pollution prevention/ good housekeeping Brown and Caldwell 9 MS4 Permit •Public education & outreach •Public participation/ involvement •City conducts various activities •Partnership with FWWA / NEWSC Brown and Caldwell 10 Educational sign at Westhaven Clubhouse Area Detention Basin MS4 Permit •Illicit discharge detection & elimination •MS4 is meant for storm water runoff only •Limited exceptions: residential car washing, foundation drains, lawn watering, etc Brown and Caldwell 11 Grass clipping info: https://www.ci.oshkosh.wi.us/StormWaterUtility/assets/pdf/GrassClippi ng.pdf •https://www.oshkoshwi.gov/StormWaterUtilit y/IDDE_program.aspx MS4 Permit •Pollution prevention/ good housekeeping •Inventory of municipal storm water BMPs •SWPPPs for municipal facilities •Documentation of programs (street sweeping, catch basin cleaning, deicer application, fertilizer application) •Internal training Brown and Caldwell 12 Salt shed at Field Operations Facility 400 North Main Street Parking Lot Biofilter Flood Control •Level of Service Goals •Watershed Studies •Implementation •Flood relief projects •Street reconstruction projects Brown and Caldwell 13 Fair Acres Detention Basin during June 12, 2008 storm event Highway 41 flooding during June 12, 2008 storm event Flood Control •Level of Service Goals •10-year design storm •Eliminate street surcharging of the storm sewer system onto the street •25-year design storm •Maintain drivability of streets (center of street “dry”) •100-year design storm •Contain runoff within the street right-of-way Brown and Caldwell 14 Flood Control •Watershed Studies •Feasibility Studies •Road CIP Infrastructure Modeling Brown and Caldwell 15 •https://www.oshkoshwi.gov/StormWaterUtilit y/Studies_and_Reports.aspx •https://www.oshkoshwi.gov/StormWaterUtilit y/assets/pdf/Storm_Water_Utility_Progress_M aps/Flood_Studies.pdf Flood Control •Implementation •Flood relief projects •Street reconstruction projects •Storm water utility brochure: •Storm water utility progress maps Brown and Caldwell 16 Box culvert installed as part of street reconstruction project Fernau Watershed -North Main Street Wet Detention Basin •https://www.oshksohwi.gov/StormWaterUtil ity/assets/pdf/Stormwater_Utility_Brochure.p df •https://www.oshkoshwi.gov/StormWaterUtil ity/Storm_Water_Utility_Progress_Maps.aspx Flood Control •Flood relief projects –interactive map •https://oshkosh.maps.arcgis.com/apps/MapTour/index.html?appid=8d8cec94c79749c99948 85e608804e8d Brown and Caldwell 17 Operations & Maintenance •Street Cleaning •Leaf Collection •Major Infrastructure •Sewer Televising •Storm Response •MS4 Map Brown and Caldwell 18 •https://www.oshkoshwi.gov/StormWaterUtilit y/MS4Permit/MS4_Map_2020.pdf