Hennepin County

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PROJECT QUESTION: Is the Category 4 Blanket the only item that will be used to stabilize the surcharge areas and is the intent then to dispose of the blanket when the surcharge is removed?

Question:
Is the Category 4 Blanket the only item that will be used to stabilize the surcharge areas and is the intent then to dispose of the blanket when the surcharge is removed?

Answer:
Category 4 blanket utilized on surcharge areas in conjunction with bioroll and silt fence as indicated on plans. Due to proximity to wildlife refuge and associated habitats, it is a DNR requirement to use biodegradable natural netting for ERC blanket type. Erosion control blanket may be re-used as many times as necessary so long as the product is functional and maintains original product integrity. If surcharge material is to be re-used, erosion control blanket MUST be removed prior to re-use in order to maintain non-organic mineral soil specification of surcharge material.