m i n n e s o t a d e p a r t m e n t o f t r a n s p o r t a t i o n（m i n n e s o t d e p t m e n t o f t r n s p o r t t i o n）.doc

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m i n n e s o t a d e p a r t m e n t o f t r a n s p o r t a t i o n（m i n n e s o t d e p t m e n t o f t r n s p o r t t i o n）.doc

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Standard Operating Procedures for Weather Events which are beyond the Design Parameters of a Temporary Erosion/Sediment Control Plan AT THE START OF THE PROJECT Put the MN Duty officer’s telephone number in the project proposal (651-649-5451 or 1-800-422-0798). Put the MPCA regional contact person’s name, address, telephone number in the project proposal. Invite the MPCA regional contact person to the pre-construction meeting. WHEN AND EXTRAORDINARY EVENT IS EMINENT The project will be evaluated by Mn/DOT and contract personnel to determine what emergency best management practice measures may be need to be put in place to help minimize an uncontrolled release from the project. AFTER AN EXTRAORDINARY EVENT Inspect the project after the extraordinary event to determine the location and magnitude of uncontrolled storm water release events. Follow up with the MPCA regional contact person within 2 days of an uncontrolled storm water release indicating what happened, what was done and what corrective measures will be taken ( if required). Document the event follow up in the project file. Corrective measures for special waters, as listed in the NPDES permit, will be given high priority in the event of an uncontrolled release. MINNESOTA DEPARTMENT OF TRANSPORTATION STANDARD OPERATING PROCEDURE EXTREME WEATHER EVENTS BEST MANAGEMENT PRACTICES (FOR LOCALIZED FLOODING WITHIN PROJECT LIMITS). CLASSIFICATION Examples Best Effective Uses Strengths Least Effective Uses Limitations EROSION CONTROL (Techniques and products to add texture and cohesiveness to a surface to minimize -- or prevent --erosion from taking place.) Erosion Control Blanket Category 5,6,7 Ditches liners: Plastic Geotextile Rock Slope Protection: Plastic Geotextile Unusual ditch and slope covers. Winter snowmelt. Large Storms Most cost-effective method in preventing the loss of sediment on a project. When installed after the fact Designed for routine events. Not robu