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S. HYDRAULICS <br />1. Reach to be Revised <br />Description Cross Section Water -Surface Elevations (ft.) <br />Effective Proposed/Revised <br />Downstream Limit* Confluence of Whiskey/Mercer NIA 1510.75 1513.62 <br />Upstream Llmit* ear 14 Road NIA NIA 2240.30 <br />*Proposed/Revised elevations must tie -into the Effective elevations within 0.5 foot at the downstream and upstream limits of revision. <br />2. Hydraulic Method/Model Used: HEC RAS v5,03 (2D) <br />3, Pre -Submittal Review of Hydraulic Models' <br />DHS -FEMA has developed two review proprams, CHECK -2 and CHECK -RAS, to aid in the review of HEC -2 and HEC -RAS hydraulic models, <br />respectively. We recommend that you review your HEC -2 and HEC -RAS models with CHECK -2 and CHECK -RAS. <br />4, <br />Models Submitted <br />Natural Run <br />Floodwa_yRun Datum <br />Duplicate Effective Model" <br />File Name: <br />Plan Name: <br />File Name: <br />Plan Name: <br />Corrected Effective Model* <br />File Name: <br />Plan Name: <br />File Name: <br />Plan Name: <br />Existing or Pre -Project <br />File Name: <br />Plan Name: <br />Fife Name: <br />Plan Name: <br />Conditions Model <br />Whiskey-Meroer2D.prj <br />p05 <br />NAVD <br />Revised or Post -Project <br />File Name: <br />Plan Name: <br />File Name: <br />Plan Name: <br />Conditions Model <br />Other- (attach description) <br />File Name: <br />Plan Name: <br />File Name: <br />Plan Name: <br />* For detalls, refer to the corresponding section of the instructions. <br />® Digital Models Submitted? (Required) <br />C. MAPPING REQUIREMENTS <br />A certified topographic work map must be submitted shoving the following information (where applicable): the boundaries of the effective, existing, <br />and proposed condRions I% -annual -chance floodplain (for approximate Zone A revisions) or the boundaries of the 1%- and 0.2% -annual -chance <br />floodplains and regulatory floodway (for detailed Zone AE, AO, and AH revisions); location and alignment of all cross sections with stationing control <br />Indicated; stream, road, and other alignments (e.g., dams, levees, etc.); current community easements and boundaries; boundaries of the requester's <br />property; certification of a registered professional engineer registered In the subject State; location and description of reference marks; and the <br />referenced vertical datum (NGVD, NAVD, etc.). <br />® Digital Mapping (GISICADD) Data Submitted (preferred) <br />Topographic Information: LiDAR Grid <br />Source: FEMA Date: 2011 <br />Accuracy: 2 ft contours _ <br />Note that the boundaries of the existing or proposed conditions floodplains and regulatory 11loodway to be shown on the revised FIRM and/or FBFM <br />must tie-in with the effective floodplain and regulatory floodway boundaries. Please attach a copy of the effective FIRM and(or FBFM, at the same <br />scale as the original, annotated to show the boundaries of the revised I %-and 0.2% -annual -chance floodplain and regulatory floodway that lie -in with <br />the boundaries of the effective 1 %-and 0,2% -annual -chance floodplaln and regulatory floodway at the upstream and downstream limits of the area on <br />revision. <br />® Annotated FIRM and/or FBFM (Required) <br />FEMA Form 086-0-27A, (212011) Previously FEMA Form 81-89 MT -2 Form 2 Page 2 of 3 <br />