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®CITY OF SOUTH BEND I OFFICE OF THE CLERK A lot of our wetlands have been lost, that exacerbated the issue. In addition to that, we are seeing since 1975, we had about twenty percent (20%) more precipitation events than we had before. Things have changed when you look at the data long-term. These were the certain hotspot areas (depicted on the presentation). These were the areas where we had the most calls on flooding events. Primarily, most of that was just basements. However, we did have some areas where the first floor was submerged as well. When you map all of those, this is what it looked like. That is not to say those were the only areas but those were definitely,by far,the hardest hit areas. He then depicted a picture that showed the one hundred (100) year floodplain and the five hundred (500) year floodplain. He stated, If you look at these areas and we overlay the flood damage from the recent event,this is what we get. It is really close to those lines. He then showed different pictures of different flooded areas within the City.He stated,We did have homes and businesses completely under water. As bad as this situation was,these red dots(referencing the presentation)are calls for flooding that had basement flooding. So, in the previous three (3) years, twenty-five (25) calls or about one point four percent (1.4%) came from those four (4) hardest hit areas. So, a very small percentage. The reason that is important is because we are going to have to look at mitigation in these hardest hit areas, but there are also ongoing issues throughout the City that are needing to be addressed. I want to make the point we have got a system that is one hundred and fifty(150)years old. There is a lot of pipe in the ground that is one hundred(100)years old or more,and the original system was built as a combined system that took the sanitary flow and the storm flow and dumped it straight into the river. The river was really our sewer for the first one hundred(100)years of our existence. For the last sixty (60) years, we built an interceptor and intercepted that flow. The way they designed it was such that when we got these rain events, the sewer would overflow into the river as opposed to overflowing into someone's basement. That is what you hope will happen every time. The last thing you want is sewage in someone's basement. Given the choice between putting it in the river or someone's basement,we are always trying to make sure it gets to the river. The issue is each storm system is different and that is why we are creating this Long-Term Control Plan to better handle these events. In this particular event,the river got so high that there were two (2)issues happening. One(1)was that the CSOs couldn't operate because,hydraulically,the water couldn't get out. The other thing that was happening is river water coming back into the sewer system itself because of the river being so high. Councilmember Karen White left the meeting at 5•.45 p.m. Mr. Horvath went on, Very quickly, here (referencing the presentation) are our greatest damage areas in terms of public infrastructure,not including the private components. A thing to note is the way the City was planned. We have a lot of parks planned along the river that were meant to flood and that really helps from a mitigation standpoint because it gives the water somewhere to go. But, that is also where we sustained most of our damage. When we looked at the damage sustained at the Wastewater Treatment Plant,it is somewhere around$225,000 total. We were pretty fortunate even because it was completely under water. We had close to $2.5 million total of damage to our parks. We have crumbled retaining walls, buckled sidewalks, sinkholes, debris and slope failures. Our chlorine system and other things were completely underwater but when the water receded and we dried everything out,we had to replace some of our electrical lines,but we only sustained about $25,000 worth of damage. We did sustain some damage to a wall at the treatment center and that will be about $200,000 worth of work. We are still working on this stuff to be insured. We are trying to figure all that out. We are trying to figure out what makes most sense and will be coming back to you for appropriations to do some fixes and figure all that out. We will also know at that EXCELLENCE I ACCOUNTABILITY I INNOVATION I INCLUSION I EMPOWERMENT 455 County-City Building(227 W.Jefferson Bvld I South Bend,Indiana 466011 p 574.235.9221 If 574.235.9173 1 TM574.235.5567 iwww.southbendin.gov 3