1. Lake Ponchartrain Normal WS EL = 0.0 Normal Operation Before Gates City of New Orleans Storm Water Pumping Station Levee Top of Levee EL = 11.5 Maximum WS EL = 11.5 Ground Elevation Varies from -5.0 to 10.0 City of New Orleans Storm Water Collection System Canal

2. Lake Ponchartrain Normal WS EL = 0.0 Normal Operation After Gates City of New Orleans Storm Water Pumping Station City of New Orleans Storm Water Collection System Canal

3. Lake Ponchartrain Normal WS EL = 0.0 Storm Surge Flows Into Canal Canal City of New Orleans Storm Water Collection System City of New Orleans Storm Water Pumping Station

4. Lake Ponchartrain Normal WS EL = 0.0 Storm Surge Flows Into Canal Canal City of New Orleans Storm Water Collection System City of New Orleans Storm Water Pumping Station

5. Lake Ponchartrain Normal WS EL = 0.0 Gates Close and Isolate Levees City of New Orleans Storm Water Collection System Canal City of New Orleans Storm Water Pumping Station

6. Lake Ponchartrain Normal WS EL = 0.0 COE Pumps Begin Pumping City of New Orleans Storm Water Collection System Canal City of New Orleans Storm Water Pumping Station

7. Lake Ponchartrain Normal WS EL = 0.0 Storm Recedes, COE Pumps Off, Canal Returns to Normal Level City of New Orleans Storm Water Collection System Canal City of New Orleans Storm Water Pumping Station