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<br />4, MODel PARAMETERS (Cone'd) <br /> <br />5 I';xplain how reach lengths for channel and overbanks were determined: <br /> <br />Len~ths were taken from new digitized aerial mapping;based on field surveyed <br /> <br />control. <br /> <br />1. <br /> <br />Do the results indicate: <br /> <br />5. ReSULTS (from model used to revise tOO-year wafer surface elevations) <br />. <br /> <br />d. Other unique situation:.:; <br /> <br />IXI Yes 0 No <br />DYes [ZJ No <br />DYes IXI No <br />o Yes IX! No <br /> <br />u. Water surface elevation!:; higher than end points of cross sections? <br />b. Supercritical depth? <br />c. Critical depth? <br /> <br />I r yes to any of the above, attach an explanation that discusses the situation and how it i~ presented on the <br />profiles.lables. and maps Original 1979 FIRM mapping was utilized where Floodplain <br />\.,idth exceeded cross sections taken from new aerial mapping. <br /> <br />2. <br /> <br />What is t~c maximum change in energy gradient between cross-sections? <br />Specify location <br /> <br />1. 05 <br />25999 <br /> <br />3. <br /> <br />What is l.1.e distance between the cross~sections in 2 above? <br /> <br />Specify location <br /> <br />'10 <br />257S9 to 25999 <br /> <br />4. <br /> <br />What is the maximum distance between cross-sections? <br /> <br />6iO feet <br />cross seCLLon <br />29190 to 29800 <br /> <br />Specify location <br />5. J"loudway determination <br /> <br />a. What is the maximum surcharge allowed by the community or State? <br /> <br />b. What is the maximum surcharge for the revised conditions? <br /> <br />Specify location <br /> <br />LO <br /> <br />foot <br />foot <br /> <br />'Co 0 <br /> <br />23755 <br /> <br />c. What i~ the maximum velocity? <br />Specify location <br /> <br />U.03 <br /> <br />fps <br /> <br />Section 26034 <br /> <br />I':xplain: <br /> <br />High velocity encountered only at Ash Avenue bridge outlet. Remainder <br /> <br />of river has velocity of 7 fps and less <br /> <br />d. ^rc there any negeati ve ~urcharge values at any cross-section ~ Yes 0 No <br /> <br />Iryes, the noodway may need to widen Ifit is not widened, please explain and indicate the maximum negative <br />surcharge At two locations, 26114 and 26787 the surcharge is - 0.1 Loot. At there <br />""'oints the channel is confined bet,.,een hi2:h banks. The lloodwav connot be widened <br />at thes2 locations <br /> <br />Riverine Hydraulic AnalYSIS form <br /> <br />Formll <br /> <br />Page 4 of 6 <br />