Part 91 Updates & Emerging Best Management Practices



Presenter: Sarah Ehinger, Soil Erosion and Construction Storm Water Specialist, 269-216-1341, ehingers1@Soil Erosion Drain Liaison:Brandie Stefanski, Senior Environmental Quality Analyst, 616-401-2352, stefanskib@DEQ Soil Erosion and Construction Storm Water Program Staff by CountyDEQ Soil Erosion & Construction Storm Water Website: soilerosion Objective: Provide a program update outlining recent changes and explore soil erosion and sedimentation practices that are gaining popularity throughout the county.Recent Changes: House Bill 4604 takes effect February 25, 2016Part 91 has always generally required permits if an earth change was within 500 feet of a lake or stream or equal to or greater than 1 acre in earth disturbance.The only exemption for agricultural activities was for plowing and tilling all other agricultural earth changes required permits if they were triggered.HB 4604 creates some additional exemptions under Part 91 for the certain agricultural activities conducted by farmers provided the activities do not discharge sediment to waters of the state or off-siteThe construction, maintenance, or removal of fences and fence linesThe removal of tree or shrub stumps or roots (clearing land to put it into agricultural production)The installation of drainage tile, irrigation or electrical linesThe construction or maintenance of 1 or more ponds that meet all of the following:The earth change is less than <5 acresThe earth change does not discharge storm water to waters of the state during constructionIs not part of a larger plan of developmentAll other types of agricultural earth changes could still trigger a soil erosion permit. (e.g. building construction, road construction, manure storage structure construction, etc.)MiWaters – Online information system for web-based permitting and complianceAccess MiWaters by clicking the link above or typing into your internet browserThe browser that works best for MiWaters is Google ChromeUse this tool to submit permits, submit compliance information, and report complaints Allows online check or credit card payments in addition to pay by mail optionsNotice of Coverage applications MUST be submitted through the MiWaters system.Resource permits are encouraged to use the MiWaters systemOur DEQ website has webinars and training videos that will help you get started. Before you get started in MiWaters it is recommended you review the following videos:MiWaters OverviewEstablishing an AccountInviting Another Person to View or Manage Your Site InformationFinding an Application or RequestSubmitting an Application or RequestContact your local DEQ Water Resources Staff if you have questionsEmerging Best Management Practices:SkimmersBeginning to be widely adopted in other states for use with sediment basins Takes the place of a perforated riser in a sediment basin during constructionOperates on a flexible joint attached to a pipe stub on the riser (or the skimmer itself is the discharge point with an emergency spill way on the basin).Skimmers regulates the draining of the basin by drawing water from the surface over the course of several daysSkimmers DO NOT increase sediment trapping efficiency in a way that allows basin size to be reducedSkimmers can be used in conjunction with PAMs and/or Baffles to further increase the sediment basin’s effectiveness While effective on sediment basins, skimmers may not be appropriate for post construction use if the sediment basin is converted to a storm water basin as they may not effectively control common pollutants of concern found during post construction conditions.Several manufacturers - contact your soil erosion product distributer to learn more about the skimmer options that are available.Resources for more information:Sediment Basins & Skimmers – Ohio DNR Presentation Controlling the Dewatering of Sedimentation Basins – Penn State ExtensionBaffles and Surface Water Design – International Erosion Control Association PresentationSediment Basins – Mississippi DEQHydraulic Erosion Control Product/Bonded Fiber MatrixHydraulically applied products designed, tested, and proven to match or exceed the performance of erosion control blanketsPrepackaged Proprietary Blends which may include some combination ofFiber MatrixTackifiersAbsorbentsFlocculating agentsMan-made fibersPlant BiostimulantsGoalsErosion ControlVegetative establishmentTested to ensure performance standards similar to blankets such as:Longevity 1-12 monthsSlopes <5:1 to <2:1C Factor .3 - .02ResourcesStandard Specification for Hydraulic Erosion Control Products (HECPs) – Erosion Control Technology CouncilHECP Installation Guidelines - Erosion Control Technology CouncilNumerous products and manufactures - contact your soil erosion product distributer to learn more about the skimmer options that are available. ................
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