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5.1 Storm Water MS4 Requirements Request for City Council Action DEPARTMENT INFORMATION ORIGINATING DEPARTMENT REQUESTOR: MEETING DATE: Public Works City Engineer Wagner June 13, 2022 PRESENTER(s) REVIEWED BY: ITEM #: City Engineer Wagner City Administrator/Finance Director Flaherty 5.1 – Storm Water STRATEGIC VISION MEETS: THE CITY OF OTSEGO: X Is a strong organization that is committed to leading the community through innovative communication. X Has proactively expanded infrastructure to responsibly provide core services. Is committed to delivery of quality emergency service responsive to community needs and expectations in a cost-effective manner. Is a social community with diverse housing, service options, and employment opportunities. Is a distinctive, connected community known for its beauty and natural surroundings. AGENDA ITEM DETAILS RECOMMENDATION: City Staff recommends the City Council hold a public meeting per the requirements of MPCA and the adopted Storm Water Pollution Prevention Program. ARE YOU SEEKING APPROVAL OF A CONTRACT? IS A PUBLIC HEARING REQUIRED? No No BACKGROUND/JUSTIFICATION: The City of Otsego must annually hold a public meeting allowing residents to communicate any ideas, suggestions or concerns they may have regarding storm water within the City. SUPPORTING DOCUMENTS ATTACHED: • MPCA Storm Water Brochure • Example MS4 Inspection Reports POSSIBLE MOTION PLEASE WORD MOTION AS YOU WOULD LIKE IT TO APPEAR IN THE MINUTES: No action or motion required. BUDGET INFORMATION FUNDING: BUDGETED: Fund 222 – Storm Water Utility Yes When stormwater drains off a construction site, it carries sediment and other pollutants that can harm lakes, streams, and wetlands. The U.S. Environmental Protection Agency estimates that a one-acre construction site can lose as much as 20 to 150 tons of soil every year due to erosion and stormwater runoff. What can you do to protect receiving waters from pollution? See the 10 Steps to Stormwater Pollution Prevention inside of this pamphlet to learn ways to minimize sediment from leaving your construction site. By following these steps, you can help keep our water clean! PROTECT WATER A common plan of development or sale is a connected area where separate construction activities may happen at different times, on different schedules, but under one proposed plan. Examples of common plans include: Residential subdivisions Commercial/industrial parks Phased projects EXAMPLE: You need a permit if you are working on one 0.3-acre lot that is part of a 5-acre development. Subdivision registration is available for sites that are within a common plan of development that already has permit coverage. COMMON PLANS www.pca.state.mn.us 651-296-6300 | 800-657-3864 info.pca@state.mn.us You need a construction stormwater permit if your project disturbs: One or more acres of soil Less than one acre, but part of a larger plan of more than one acre 1+ .15acres DON’T FORGET! Online permit applications: www.pca.state.mn.us/water/ construction-stormwater Apply for your construction stormwater permit BEFORE construction begins! wq-strm2-111 800-657-3864 | info.pca@state.mn.us www.pca.state.mn.us Graphic courtesy US EPA. Adapted by MPCA. Site St abilization Immediately stabilize exposed portions of the site whenever construction work will stop for 14 or more days, even if work is on ly temporarily stopped. Remember, ﬁnal stabilization is required pr ior to terminating permit coverage. Keep in mind that temporary or permanent stabilization must be completed within 7 days if your project is within 1 mile of a special or impaired water. Keep an Up -to-Date Copy of Your SWPPP on Site Keep a copy of your complete and up-to-date SWPPP, including site maps showing where each BMP is or will be installed, and records of the site inspections completed by a trained inspector on site and easily accessible. Maintain a Stabilized Exit Pad Minimize sediment track out from vehicles exiting your site by maintaining an exit pad made of crushed rock spread over geotextile fabric, a shaker rack, or a wash rack at the construction site exit. If sediment track-out occurs, remove deposited sediment within 24 hours of discovery. Install a Concrete/Stucco Washout Basin Designate a leak-proof basin lined with plastic for washing out used concrete and stucco containers. Never wa sh excess stucco or concrete residue down a storm drain or into a stream! Install Inlet Controls Sediment control logs, gravel barriers, and sand or rock ba gs are options for e ective inlet controls. Make sure to remove accumulated sediment whenever the device becomes nonfunctional. Install Perimeter Controls on Downhill Lot Line Install perimeter controls such as sediment ﬁlter logs or si lt fences around the downhill boundaries of your site. Make sure to remove accumulated sediment whenever it has reached halfway up the control. Designate Waste Disposal Areas Clearly identify separate waste disposal areas on site for hazardous wa ste, construction waste, and domestic wa ste by designating with signage, and protect from run-on and runo. Protect Construction Materials from Run-On and Runo At the end of every workday and during precipitation events, prov ide cover for materials that could leach pollutants. Stockpile Yo ur Soil MPCA’s CGP requires operators to preserve native topsoi l on site unless infeasible and protect all soil storage piles from run-on and runo. For smaller stockpiles, covering the entire pi le with a tarp may be sufﬁcient. Protect Any Areas Reserved for Vegetation or Inﬁltration and Preserve Existing Tr ees If you will be installing inﬁltration-based features such as ra in gardens or bioswales, make sure these areas are designated as o limits to avoid compaction. Save time and money by preser ving existing mature trees during construction. Preserving mature trees minimizes the amount of soil that needs to be stabilized once construc tion is complete, and minimizes the amount of runo du ring and after construction activity. 10 Steps to Stormwater Pollution Prevention on Small Residential Construction Sites NOTE: This graphic does not address post-construction stormwater treatment permit requirements MS4 Inspection Report 18219099360 Inspection Information Name of City:Otsego Type of inspection:Skimmer Inspectors name & email:Andy Evans / andye@haa-inc.com Date of inspection:Dec 2, 2021 Date of last precipitation:Nov 30, 2021 Last amount of precipitation:Na Inspection Details Skimmer Unique ID:SK-21-121-23-4-3-01 Location 8060 O'Day Ave NE, Elk River, MN 55330, USA latitude: 45.267835819650564 altitude: 274.03552 longitude: -93.59102950556706 [ viewMap ] Is there any erosion around structure? If yes, explain. Erosion on both fes’s Are any of the pipes clogged? If yes, explain where and with what. Both fes are full of debris Does the structure have a weir? If yes, is it functioning properly? No Weir For concrete structures, are there any cracks, spalling, exposed rebar, or joint failures? None Are there signs of illicit discharge such as odor, unusual color, turbidity, staining/deposit? None Is there any undesirable vegetation growth such as trees, shrubs, or invasive species? Trees Are there any obstructions to getting maintenance equipment to the outfall? Trees Inspection Summary Overall condition:Needs repair Maintenance or any other concerns?culvert needs to be cleaned out . . Photos: . MS4 Inspection Report PAGE 2 OF 2 OtsegoSkimmerSK-21-121-23-4-3-01Needs repair 2021-12-02 . MS4 Inspection Report 18220134967 Inspection Information Name of City:Otsego Type of inspection:Skimmer Inspectors name & email:Andy Evans / andye@haa-inc.com Date of inspection:Dec 9, 2021 Date of last precipitation:Dec 7, 2021 Last amount of precipitation:Na Inspection Details Skimmer Unique ID:SK-31-121-23-2-1-01 Location 6890 Marlowe Ave NE, Otsego, MN 55301, USA latitude: 45.25163902153363 altitude: 290.1507 longitude: -93.63755261643757 [ viewMap ] Is there any erosion around structure? If yes, explain. None Are any of the pipes clogged? If yes, explain where and with what. None Does the structure have a weir? If yes, is it functioning properly? No Weir For concrete structures, are there any cracks, spalling, exposed rebar, or joint failures? Tree root growing through joint Are there signs of illicit discharge such as odor, unusual color, turbidity, staining/deposit? None Is there any undesirable vegetation growth such as trees, shrubs, or invasive species? Tree Are there any obstructions to getting maintenance equipment to the outfall? None Inspection Summary Overall condition:Needs repair Maintenance or any other concerns?Tree root growing through joint . . Photos: . MS4 Inspection Report PAGE 2 OF 2 OtsegoSkimmerSK-31-121-23-2-1-01Needs repair 2021-12-09 .