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<br />~ <br /> <br />.-.. <br /> <br />-- <br /> <br />will require acquISItIOns and drainage easements which are costly. Projects <br />associated with the re-establishment of those corridors are presently planned but not <br />scheduled in the near future. <br /> <br />Irrigation Ditch Soills <br /> <br />Ft. Collins has several irrigation ditches that cross the City. These ditches often <br />intercept stormwater and carry it to downstream areas that would not normally be <br />impacted by flooding. During large storm events, the ditch capacity is often <br />exceeded resulting in spills. There is potential for these spills to occur at almost any <br />location along the ditch, resulting in flooding. Plans to control the spill of the canals <br />is planned for the future, but is very costly. Therefore, the early warning system will <br />help to notify emergency responders and residents when flooding is occurring and <br />that the irrigation ditches may be a potential problem. <br /> <br />Culvert and Bridge Blockages <br /> <br />During any flooding event there is the potential for culverts and bridges to become <br />blocked with debris. These blockages can then result in greater flooding. An early <br />warning system could help with detecting the possibility of debris blockages so that <br />maintenance crews could be dispatched to correct the problem before more flooding <br />occurs. <br /> <br />C. <br /> <br />Project is in Conjunction With the City's Early Warning Master Plan <br /> <br />The Fort Collins flood warning system has become a useful tool in an already diverse <br />floodplain management program. A description of the City's Master Plan regarding the flood <br />warning system is provided here to establish the relationship of the proposed project to the <br />City's ultimate project goals. <br /> <br />The Master Plan represents the optimum early warning system for the City of Fort Collins. <br />The precipitation and stream flow gaging network proposed for the Master Plan employs 25 <br />precipitation and 53 streamflow gages. This density and coverage of the precipitation and <br />streamflow gages will provide the greatest benefits to the City. This proposed expansion <br />would help in achieving this denser network of gages. The future data analysis capabilities <br />will provide for estimates of streamflow at several locations throughout the City and will <br />include forecast streamflow hydro graphs and identification of flood inundation boundaries. <br />This system will enhance the warning capability by providing for refined streamflow and <br />flood inundation estimates at more specific locations within the City through the utilization <br />of the forecasting capabilities. The gaging network will continue to grow over time. <br /> <br />D. <br /> <br />Hazard Effects and Risk Reduction <br /> <br />By expanding the system with the proposed streamflow and precipitation gages, we are <br />providing better coverage over the large geographic area of the City. A more dense network <br />of gages will result in more accurate data that can be used for providing greater lead-time in <br />a flood emergency. <br /> <br />18 <br />