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TASK 8. HYDRAULIC ANALYSIS <br />The USACE will build a steady state georeferenced existing conditions (including <br />existing structures) HEC-RAS hydraulic model of the Saint Joseph River through the <br />project area using the combination of existing and collected survey data and the best <br />topographic overland data available and developed into a DEM under Task 3. The results <br />of the hydrologic analysis and flood events/levels agreed upon in TASK 7 will be used in <br />the hydraulic model for the purpose of mapping the required library flood inundation <br />maps. The hydraulic model will be calibrated to the USGS gage rating curve data and to <br />existing high water marks (if available). <br />The estimated cost/value of the Task 8 work is $31,000.00. <br />TASK 9. MAPPING <br />Flood delineation mapping will be performed by the USACE for the agreed upon <br />modeled flood stages and events creating a series of flood maps from the approximate <br />bankfull stage to highest rated stage. This geospatial processing will be done on the best <br />available terrain data gathered in Task 3. The flood delineations for all of the flood <br />events/stages will be minimally cleaned up to represent as accurate of a floodplain as the <br />terrain data allows without the smoothing of the flood inundation polygons or final clean- <br />up which the USGS will do. <br />The estimated cost/value of the Task 9 work is $13,000.00. <br />TASK 10. SUMMARY REPORT <br />Findings of Task 3-9 will be summarized in a technical report (including the supporting <br />documents) by the USACE for the Saint Joseph River in South Bend, IN. The technical <br />summary report will be a simplified model report describing the hydrologic data and the <br />modeling and mapping effort. The technical summary report and its related supporting <br />documents, the hydraulic model, and the resulting GIS layers (flood extent polygons and <br />depth grids) will be summited to USGS for review of completeness. Both USACE and <br />USGS will coordinate to finalize the previously mentioned set of documents and data <br />sets. This report will be based on the template provided by USGS. <br />The estimated cost/value of the Task 10 work is $20,000.00. <br />A-7 <br />