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<br />Flood Problems <br /> <br />The residential and commercial areas in Ordway <br />are not adequately drained by the existing drainage <br />system, particularly in those areas immediately north of <br />the railroad grade. The flooded area for the 100-year <br />event are shown on Figure 2. This information was <br />developed during preparation of the town's Master <br />Drainage Plan using hydrologic data in combination with <br />a hydraulic analysis of the existing street and storm <br />sewer system. The analysis supersedes the Flood Hazard <br />Boundary Map published by the Federal Emergency Management <br />Agency (FEMA) for the Town of Ordway in August 15, 1975 <br />as shown in Figure 3. <br /> <br />East Basin <br /> <br />The flooding which occurs within the East basin <br />is largely the result of inadequate culvert capacity at <br />the railroad crossing over the Town of Ordway Ditch_ <br />This constriction forces flow to backup to the level of <br />the railroad grade, and will cause shallow flooding west <br />along Railroad Avenue. Several single-family residences <br />and two businesses would be effected in a lOO-year <br />event_ <br /> <br />The Town of Ordway Ditch would have adequate <br />capacity to contain the lOO-year flood flow if the <br />restriction at the railroad crossing were removed. Most <br />of the area currently flooded along the eastern flow <br />path would be removed from the floodplain if a lOO-year <br />crossing were constructed at this location. The <br />existing structure has less than a lO-year capacity_ <br /> <br />Central Basin <br /> <br />The areas inundated within <br />of Ordway result from the lack of <br />sub-surface drainage facilities. <br />effectively blocks the flow along <br />flooding is typically from one to <br />effects single-family residences, <br />the town's south City Park_ <br /> <br />the central portions <br />adequate surface and <br />The railroad grade <br />Railroad Avenue. The <br />three feet deep and <br />some businesses, and <br /> <br />Flood waters which originate within the Central <br />basin are conveyed to the box culvert at City Park via <br />the street system. Many of the streets in the Central <br />basin do not have curb and gutter, and have only minimal <br />asphaltic surfaces. Additionally, the lack of curb and <br />gutter in combination with residences with first floors <br /> <br />5 <br />