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levels are sometimes referred to as "level of service" and "level of protection"). City stormwater <br />management systems are described in greater detail in each City's local water management plan. <br />Each city within the LRRWMO must obtain Municipal Separate Storm Sewer System (MS4) permit <br />coverage from the MPCA. The MS4 Stormwater Program is designed to reduce the amount of sediment <br />and pollution that enters surface water and groundwater from storm sewer systems. As a requirement of <br />the permit, each city must develop and maintain a stormwater pollution prevention program (SWPPP) <br />which outlines programs and practices to minimize pollutant loading and water quality impacts resulting <br />from stormwater management. The SWPPP contains six areas of focus, known as minimum control <br />measures, including: <br />• Public Education and Outreach <br />• Public Participation/Involvement <br />• Illicit Discharge Detection and Elimination <br />• Construction Site Stormwater Runoff Control <br />• Post -Construction Stormwater Management <br />• Pollution Prevention/Good Housekeeping For Municipal Operations <br />Each MS4 permittee submits a report to the MPCA annually documenting the implementation of its <br />SWPPP. The LRRWMO is not required to obtain MS4 permit coverage because it does not own stormwater <br />management infrastructure. The MPCA periodically updates the MS4 General Permit. More information is <br />available from the MPCA at: . c . . t id - - s <br />Owners of private stormwater systems in the LRRWMO are generally responsible for maintaining their <br />facilities. Maintenance requirements for private systems are documented in agreements with each city <br />developed during project permitting. <br />Floodplains are lowland areas adjacent to lakes, wetlands, and rivers that are susceptible to inundation of <br />water during a flood. For regulatory purposes, the term "floodplain" refers to the area inundated during a <br />flood or storm event with a 1 percent chance of occurring in any year (i.e., a 100-year event). <br />The Federal Emergency Management Agency (FEMA) performs flood insurance studies (FIS) and develops <br />Flood Insurance Rate Maps (FIRMs) to identify areas prone to flooding during 100-year storm events. The <br />water level corresponding to the 100-year flood event is referred to as the Base Flood Elevation (or BFE) <br />and is the basis for the mapped floodplain extent. Figure 2-13 presents floodplains delineated by FEMA. <br />Each of the cities within the District has a FIS. The FIS, together with a city's floodplain ordinance, allow <br />the city to take part in the national flood insurance program (NFIP). Homeowners within FEMA-designated <br />floodplains are required to purchase flood insurance. NFIP is implemented independently of the District <br />and are described herein for informational purposes. FEMA-established floodplains and 100-year flood <br />levels are available from FEMA at: tts:// . ... /+ <br />2-34 <br />