Uncontrolled stormwater runoff from construction sites can significantly impact rivers, lakes and estuaries. Sediment in waterbodies from construction sites can reduce the amount of sunlight reaching aquatic plants, clog fish gills, smother aquatic habitat and spawning areas, and impede navigation. According to the EPA, sediment runoff rates from construction sites are typically 10 to 20 times greater than those of agricultural lands, and 1,000 to 2,000 times greater than those fo forest lands. During a short period of time, construction sites can contribute more sediment to streams than can be depostied naturally during several decades.
All construction projects within the City of Owatonna are required under the Stormwater Management Ordinance to apply for a Grading/ Erosion & Sediment Control (ESC) permit.
The Storm Water Manager will verify that all information submitted on the permit application is in compliance with Minnesota Pollution Control Agency (MPCA) Municipal Separate Storm Sewer System (MS4) General Permit (MNR040000) and the City of Owatonna's Stormwater Pollution Prevention Plan.
Overall site grading and erosion & sediment control best management practices are reviewed to ensure that stormwater is not being diverted on to neighboring properties or pollutants leaving the site during construction. Grading permit fees can be paid at the same time (one payment) with the building permit fees.