Laserfiche WebLink
<br />the downstream distances must be sufficient to mitigate starting conditions <br />profile errors prior to downstream f100dway revisions associated with the <br />structure. Upstream distances must be of sufficient distance that the modified <br />conditions profile converges to that ofthe base condition. The distances will <br />vary depending on the magnitude of the f100dway revision and the hydraulic <br />characteristics of the stream. <br /> <br /> <br />I <br /> <br />7-29 <br /> <br />30' FRONT <br />7-30 SETBACK <br /> <br />,. <br />i <br />~ <br />co <br />Q <br /> <br />DELUGE ROAD <br /> <br />1" = 25' <br /> <br />The following shall be <br />shown on this plot <br />plan. <br />Size of the lot. <br />location of house on <br />the lot. <br />House dimension. <br />Width of each side <br />yard. <br />Depth of front yard. <br /> <br />2. Photographs. Photographs must be taken along the stream s~ <br />channel and ground cover in the overbank areas. Photographs s: <br />be taken to show the upstream and downstream ends of all control <br />in the vicinity of the proposed developmer.t. <br /> <br />3. plan View. Aplan view ofthe proposed development must b <br />with the materials submitted for review. The plan view must sho" <br />dimensions of the proposed change in the relation to the stream <br />physical and geographic features. The geometry of the propose< <br />ment should also be shown on the valley cross section so that the <br />effects of the encroachment on the opposite side of the strea <br />analyzed. (See Figure 8) <br />Road Elevation <br /> <br />Geometry of Bridge Rail \ <br /> <br /> <br /> <br />FLOOD FRINGE <br />AREA <br /> <br />;J <br />.2 <br />, <br /> <br />Low Steel Elevation <br /> <br />Pier Width -- <br />Abutment Slope <br /> <br />c <br />.2 <br /><il <br />> <br />'" <br />w <br /> <br /> <br />TAX PARCH <br />7-31 <br /> <br />Distance - feet <br /> <br />Figure 9: Bridge Cross Section <br /> <br />4. Bridge Data. For cases where a bridge is the controlling fa <br />analysis of the proposed development, the effect of the bridge on <br />surface profile must be determined. The following data are requir <br />a. A representative valley cross section, <br />b. A cross section along the centerline of the bridge to the a! <br />floodplain limits (See Figure 9), <br />c. The roadway elevation, road width, and type of surface, <br />d. A cross section of the bridge opening showing the low ste <br />lion, bridge abutments, piers, and channel, <br />e. The number, size, and type of piers, <br />f. The bridge skew (the angle between the centerline of the <br />a line drawn perpendicular to the channel flow, <br /> <br />Figure B: Plan View of Proposed Development <br /> <br />16 <br />