MN CSW Permit Section 7 BMP Selection and Stormwater Management MN CSW Permit Section 7 BMP Selection and Stormwater Management

SECTION 7 BMP SELECTION AND STORMWATER MANAGEMENT

7.1

BMP Selection and Stormwater Management.

7.2

Permittees must select, install, and maintain the BMPs identified in the SWPPP and in this permit in an appropriate and functional manner and in accordance with relevant manufacturer specifications and accepted engineering practices to minimize the discharge of pollutants in stormwater from construction activities. Examples of stormwater management practices for this section include but are not limited to wet sedimentation basins, temporary depressions to hold stormwater, stormwater routing, dikes, berms, pumping, and stormwater treatment BMPs. Permittees must phase and incorporate stormwater management principles as the construction progresses. Unless infeasible, temporary or permanent wet sedimentation basins (when required, see section 14 and 15) should be constructed as a first step in the process and stormwater routed to these.

7.3

Permittees must not disturb more land (i.e., phasing) than can be effectively inspected and maintained in accordance with Section 11.

7.4

If permittees will be using some type of erosion control netting on the site as part of the soil stabilization techniques, permittees are encouraged to use products that have been shown to minimize impacts on wildlife. The U.S. Fish & Wildlife Service recommends using types of netting practices that are considered “wildlife friendly,” including those that use natural fiber or 100 percent biodegradable materials and that use a loose weave with a non-welded, movable jointed netting. Products that are not wildlife friendly include square plastic netting that are degradable (e.g., photodegradable, UV-degradable, oxo-degradable), netting made from polypropylene, nylon, polyethylene, or polyester. Other recommendations include removing the netting product when it is no longer needed. More information may be found at: Make the Change to Wildlife-Friendly Erosion Control Products! | U.S. Fish & Wildlife Service (fws.gov). There also may be State, Tribal, or local requirements about using wildlife friendly erosion control products. See Minnesota Department of Transportation requirements at: Rolled Erosion Prevention Products - Erosion Control and Stormwater Management -– MnDOT.