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<br />g. Size of bridge opening, <br />h. Description of bridge railings, and <br />i. Photograph of the bridge opening, channel, overbanks, right and left <br />roadway approaches, and the top of the roadway. <br /> <br />S. Culvert Data. For cases where a culvert is the controlling factor in the <br />analysis and the effects of the water surface profile of the culvert must be <br />computed, the following data are required: <br />a. A representative cross section, <br />b. A cross section along the centerline of the road to the assumed <br />floodplain limits (See Figure 10), <br />c. Road width, <br />d. Type of surface, <br />e. Number, type, size, and length of culverts, <br />f. Upstream and downstream invert elevations of the culverts, <br />g. Skew of the culvert (the angle between the centerline of the culvert <br />and a line drawn perpendicular to the f1ow),and <br />h. Inlet characteristics (e.g. headwall, projecting, mitered, etc.) <br /> <br />Stream...." I <br /> <br />b. Elevations and description of the dam, <br />c. Elevation, dimensions and description of the spillway and, <br />outlet works, <br />d. Representative downstream cross sections to determine tail <br />fects, and <br />e. Operating plan for the dam (if available) <br /> <br />top of dam elevation <br /> <br />width <br /> <br />E <br />OQ <br />.~ <br />.c <br /> <br />@)-- <br /> <br /> <br /> <br />sill of gate <br />elevation <br /> <br />(])-- <br /> <br />--+ <br /> <br />Figure 11: Front View of Dam <br /> <br />6-3. Analysis Procedures. The increase to the water surface pre <br />be referenced tothe existing conditions profile developed when the: <br />was first established. The base and modified conditions water surfa, <br />analysis must extend far enough upstream and downstream to evo <br />impact of the proposed development. <br /> <br />If the input data of the original regulatory conditions is unavailab <br />data set shouid be developed using the original cross-sectional tOf: <br />information and the discharge values contained in the Flood Insurar <br />which establish the original floodway. The profile analysis shoul( <br />performed confining the effective flow area to the currently es <br />floodway and calibrated to reproduce the FIS profile. The modified <br />conditions are then evaluated using the above procedures. <br /> <br />@--- <br /> <br />Pipe <br />Culvert <br /> <br />Upstream Invert <br /> <br />Road <br /> <br />Pipe Culvert: <br /> <br />Assumed Floodplain limit <br /> <br />Figure 10: Plan View of Culvert <br /> <br />6. Dam Data. For situations where a dam in the controlling factor in the <br />analysis and the effects of the water surface profile from the dam must be <br />computed, the following data are required: (See Figure 11) <br />a. Type, size, and number of gates if appropriate, <br /> <br />7. Floodway Revision Submittal Procedures <br /> <br />7-1. General. This section describes the data requirements tha <br />submitted by the community for review of floodway development I <br />and if approved, revisions to the floodway. The potential actions of I <br />on a request are also described. <br /> <br />7-2 Data Requirements. Technical data submitted to FEMA in s <br />a f100dway revision request should include that listed in the I <br />paragraphs: <br /> <br />18 <br />