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Lower Amason Floodplain Mapping Project Page 7 <br /> Pacific Water Resources, Inc. 6/16/04 <br /> 1!" ~ Cross Section Locations. PWR will map the cross section locations as a GIS line map layer and <br /> `.liute with appropriate data as required by FEMA specifications. <br /> Map Floodplain Boundaries. PWR will map the 100-year and the 500-year floodplain boundaries using <br /> automi~ted mapping tools and will develop GIS polygon map layers for each. Floodplain widths shall be <br /> consistent with modeled widths at each RAS cross section, as required by FEMA. Boundaries will be polygons <br /> and will be appropriately attributed as required by FEMA for use in developing work maps (Task 8). <br /> Tabuli~te Floodway Widths. PWR will create a Floodway Data Table in FEMA FIS format suitable for <br /> subnnis~ion as part of the FIS submittal package. <br /> Map F~oodway Boundaries. PWR will map the floodway boundaries using the GIS map layers of the cross <br /> section, stream centerlines and floodplain boundaries such that the floodway widths are consistent with the <br /> model dross section inputs and the Floodway Data Table. As with the floodway modeling, PWR makes use of <br /> special ~'I innovative routines to greatly expedite the mapping of the floodway boundaries and ensure that they <br /> are copsistent with the Foodplain boundaries, the data table, and with the model input. <br /> Compleete FIS Work Maps. PWR will use work map templates in DWG format that were successfully <br /> submitted to FEMA for previous FIS studies as the basis for completing work maps for this submittal. PWR <br /> will ingorporate information from GIS mapping of floodplain and floodway boundaries, cross sections, and <br /> stream benterlines, together with the previously submitted base map information, to complete work maps that <br /> meet F~MA Guidelines and Specifications and are consistent with FIS report tables and profiles and with the <br /> model labeling and results. <br /> Cheek ;Tnternat Consistency. PWR will review hydraulic models, floodplain and floodway boundary <br /> ~~in~g, floodway data tables, flood profile plots, and work maps to ensure that all data is internally <br /> stst~nt regarding section widths and distances, section labeling, flood elevations at sections, and floodplain <br /> flo~dway widths at sections. <br /> Deliveijables: (submitted in FEMA format) <br /> • ',FIS floodway data table <br /> • ',FIS flood profiles for the 1-percent and 0.2 percent annual chance events - - <br /> • 'GIS map of cross section locations <br /> • ~ GIS map of floodplain boundaries <br /> • I GIS map of floodway boundaries <br /> • ~I, Digital work mays <br /> TAS~(~18. FEMA FIS SUBMITTAL <br /> This task and the following task make up the scope of work for Phase 2B. This task involves completing the <br /> FEMA ~ubmittal package according to the FEMA Guidelines. Results from Task 5, 6, and 7 are incorporated <br /> <br /> togethefi mto FIS report tables, and GIS map layers. They are then consolidated into a special and very <br /> complidated FEMA-specified Digital FIRM format. <br /> Create jGIS Digital Flood Insurance Rate Map Layers. Using GIS map covers generated by PWR and <br /> inforrnajtion provided by the City (Task 4), PWR will consolidate the GIS map layers developed in this project <br /> <br /> to produce the GIS DF1RM submissions (e.g. political boundaries, hydrography, and flood hazard areas). The <br /> <br /> DF1RM' submittal incorporates the FIS and DF1RM results as specified in the Guidelines and the DFIRM <br /> <br /> Specifications. These requirements are lengthy, involved, complex, and exacting, but PWR has the advantage <br /> a ing previously accepted map layers as templates to complete the GIS products for this submittal in an <br /> „amely cost-eiTective manner. <br /> <br />