Laserfiche WebLink
<br />st.-uctu.-ein'lolved. <br /> <br />A p.-onounced increase in flow velocities usually <br /> <br />occu.-s downstream from an obstruction, thus increa~ing the flood's <br />damage pot~~tial. Obstructive new developnent and future land fills <br />in or near the stre~ms' floodway can be ~ major factor in multiplying <br />the adverse effects described above. <br />Estimated future flood crests and pertinent elevations <br />at bridge crossings and culverts within the study area are listed <br /> <br />in Table 4. rcr <br />limited clogging <br /> <br />purposee ",f this .stool', it ha~ b,,~n assll!'Oed that <br />can be expected and that all bridge structures and <br /> <br />culverts would remain intact. <br /> <br />Significant changes in this premise, <br /> <br />imposed bY,differing COnditions of a future flood, could alter the <br />estimated flOod crests and flood limits shown in the table and <br />related plates. <br /> <br />TI\.FlI,E3 <br /> <br />rLOOD CAARACTElUSTICS OF SALT CREEK <br /> <br />Averaged Maximum Conditions <br />~aqnitudC of Occurence <br /> <br />Characteristic <br /> <br />5tand"rd <br />Project <br />""'" <br />15,129 <br />11.0 <br />'.0 <br />n <br /> <br />Intermediate <br />Regional <br />Flood <br /> <br />9,182 <br /> <br />Peak Discharge (cis) <br />Height of Rise (feet) <br />R~_t~ of ~j~.. (1'''''.1" !,"r h'.",rl <br />Duration of Flooding (hours) <br />~in Channel Velocity (feet per second) <br />Overbank Velocity (feet ~er second) <br /> <br />7.7 <br /> <br />u <br />u <br />'" <br />U <br />3.8 <br /> <br />'-' <br /> <br />Future rlo<xJ Heights <br />Throughout the study reach, average water surface ele- <br />vations for t~e Standard Project Flood exceed those of the Intermediate <br /> <br />Regional Flood by 2.5 f..et. <br /> <br />rigures 2 and 3 show th" height that <br /> <br />~~ld b" r~ched by future floods on facilities presently cxistinq <br /> <br />within the flood plain con~idered in the study. <br /> <br />" <br /> <br />:1 <br />~I <br /> <br />" <br />" <br />o <br />H <br />H <br />~ <br />0;, <br />H' <br />"c <br />1 <br />:1 <br />"' <br />", <br />e! <br />H <br />; <br />" <br />" <br />~. <br />" <br />c <br />< <br />" <br />~ <br />" <br />@ <br />u <br />" <br />" <br />:3 <br />8 <br />H <br />" <br />" <br /> <br />"" il <br />2i i;j u!.., <br />'" :3 01 ~ <br /><, ~c" <br />'" - i <br />" , <br />" <br /> <br />" <br />~ ..l <br />0$ <br />~8 <br />",>< <br />~" <br />H <br /> <br />H <br />"' <br />1< <br />u" <br />, <br />u " <br />II <br /> <br />" . <br />,,< < <br />~ ~ ~ <br />" " <br /> <br />. <br />"< <br />~ i:ll <br />"H" <br />" <br /> <br />~I <br />"' <br />~. <br />~Il <br />c:!,(, <br />"'1 <br />",c <br /> <br />,c <br />~ ~j <br />~ il <br /> <br />- <br />(3; <br />~I <br />~I <br />~I <br /> <br />o H <br />o H <br />" " <br />" " <br />o , <br /> <br />o 0 <br />H H <br />" " <br />" " <br /> <br />H " <br /> <br />o <br />o <br />H <br />" <br />" <br /> <br />H <br /> <br />H <br />H <br />" <br />" <br /> <br />H <br /> <br />o <br />H <br />o <br />" <br /> <br />o <br />o <br /> <br />o <br /> <br />o <br />< <br />, <br /> <br />H <br />, <br />, <br />" <br /> <br />" <br /> <br />~ <br />- <br />" <br /> <br />- <br /> <br />o <br /> <br />, <br />- <br />" <br />. <br /> <br />o <br />o <br />, <br />o <br />" <br /> <br />H <br />o <br />a <br /> <br />" <br />" <br />" <br /> <br />, <br />, <br />, <br />o <br />. <br />~ <br />o <br /> <br />. <br />" <br />,^ <br />o <br />. <br /> <br />" <br /> <br />" <br />^ <br />" <br />. <br /> <br />. <br /> <br />cO <br />" <br />o <br />. <br /> <br />o <br /> <br />, <br />" <br />o <br />. <br /> <br />" <br /> <br />. <br />- <br />o <br />. <br /> <br />o <br />a <br />~ <br /> <br />o <br />" <br /> <br />~ <br />" <br /> <br />, <br />. <br />l <br />~ <br />~ <br />" <br /> <br />o <br />Z.g <br />o~ <br />o 0 <br />00 <br />o <br />" <br /> <br />N <br /> <br />H <br />" <br />" <br />" <br /> <br />- <br /> <br />a <br />" <br />" <br /> <br />. <br /> <br />o <br />" <br />" <br />" <br /> <br />. <br /> <br />, <br /> <br />H <br />" <br />o <br /> <br />. <br /> <br />o <br />o <br />" <br />" <br />" <br /> <br />o <br />o <br /> <br />H <br /> <br />. <br />N <br />~ <br /> <br />. <br /> <br />. <br /> <br />o <br />^ <br />" <br />. <br />o <br /> <br />o <br />S <br />" <br /> <br />. <br /> <br />o <br />" <br />" <br />" <br /> <br />" <br /> <br />o <br /> <br />o <br />c' <br />" <br />H <br /> <br />, <br />" <br /> <br />N <br /> <br />a <br />" <br />" <br />H <br />. <br />" <br />" <br />o <br />.g <br />, <br />5 <br />< <br />3' <br />~ <br />H <br />o <br />, <br />" <br /> <br />o <br /> <br />" <br />" <br />" <br />. <br /> <br />o <br /> <br />o <br />C <br />" <br />o <br /> <br />" <br /> <br />. <br />N <br />" <br />. <br /> <br />" <br /> <br />" <br />N <br />" <br />. <br /> <br />" <br /> <br />" <br />" <br />" <br />o <br /> <br />o <br />a <br />N <br /> <br />I <br /> <br />, <br />o <br />~ <br />< <br />o <br />o <br />'" <br />, <br />, <br />, <br />o <br />, <br />,~ <br />~ <br />. <br />, <br />" <br /> <br />o H <br />o 0 <br />o 0 <br />o " <br /> <br />. . <br /> <br />00 <br />"' <br />" <br />" <br />o <br /> <br />o <br /> <br />H <br />" <br />N <br />" <br /> <br />,. <br />N <br />H <br />N <br />" <br /> <br />" <br /> <br />H <br />. <br />N <br />o <br /> <br />o <br />" <br />o <br /> <br />< <br />o <br />, <br />, <br />o <br />8 <br /> <br />. <br /> <br />o <br />o <br />00 <br />. <br /> <br />. <br />N <br />o <br />o <br />o <br /> <br />N <br />" <br />, <br />N <br /> <br />. <br /> <br />N <br />H <br />o <br />N <br />" <br /> <br />a <br />c. <br /> <br />. <br /> <br />o <br />, <br />a <br /> <br />H <br />, <br />, <br /> <br />" <br /> <br />N <br />" <br />N <br />" <br /> <br />. <br /> <br />H <br />" <br />H <br />o <br /> <br />. <br /> <br />. <br />N <br />H <br />ro <br />" <br /> <br />o <br /> <br />N <br />o <br />o <br />" <br /> <br />00 <br />" <br />~ <br />N <br />. <br /> <br />c' <br />c, <br /> <br />. <br /> <br />I <br /> <br />, <br />. <br />-5 <br />, <br />, <br />" <br />o <br /> <br />o <br />o <br />o <br />o <br />o <br />H <br />, <br />V <br /> <br />o <br /> <br />o <br />~ <br />a <br />. <br /> <br />, <br />N <br />H <br />" <br />. <br /> <br />~ <br />N <br />~ <br />00 <br />" <br /> <br />, <br />o <br />o <br />ro <br />. <br /> <br />o <br />o <br />" <br />N <br />. <br /> <br />00 <br />^ <br />. <br /> <br />I <br />o <br />~ <br />" <br />" <br /> <br />a <br />" <br />H <br />00 <br /> <br />. <br /> <br />o <br /> <br />N <br />H <br />o <br />. <br /> <br />H <br />o <br />o <br />00 <br />. <br /> <br />H <br />H <br />o <br />" <br />,. <br /> <br />~ <br /> <br />00 <br />C <br />C <br />. <br /> <br />.. <br />" <br />. <br /> <br />o <br />I <br /> <br />H <br />, <br />, <br /> <br />00 . <br />o H <br />" " <br />00 C <br />. " <br /> <br />.. <br /> <br />H <br />. <br />o <br />. <br /> <br />. <br />N <br />M <br />C <br />. <br /> <br />00 <br /> <br />.. <br />H <br />C <br />. <br /> <br />o <br />H <br />N <br />o <br /> <br />" <br /> <br />o <br />o <br />C <br /> <br />c <br />, <br />I <br /> <br />. <br /> <br />, <br /> <br />o <br /> <br />~ <br />C <br /> <br />. <br /> <br />N <br />00 <br />. <br />o <br />. <br /> <br />M <br />N <br />" <br />C <br />. <br /> <br />N <br /> <br />co <br />. <br />" <br />" <br /> <br />N <br />C <br /> <br />cN <br /> <br />" <br />o <br />a <br /> <br />H <br />, <br />, <br /> <br />~ <br />N <br />N <br />C <br /> <br />" <br /> <br />N <br />H <br />N <br />00 <br />. <br /> <br />N <br />o <br />N <br />o <br />o <br /> <br />00 <br /> <br />.. <br />N <br />C <br />. <br /> <br />H <br />N <br />C <br />o <br />. <br /> <br />" <br />. <br />o <br /> <br />" <br />< <br />o <br />~ <br />N <br /> <br />, <br />. <br />, <br />C <br />. <br />.. <br />o <br />C <br />N <br />, <br />H <br /> <br />N <br />N <br />N <br />C <br />. <br /> <br />"' <br />N <br />N <br />o <br />" <br /> <br />H <br /> <br />C <br />N <br />ro <br />. <br /> <br />a <br />c <br />N <br />o <br />. <br /> <br />C <br />N <br />" <br />C <br />" <br /> <br />c <br />. <br />" <br /> <br />N <br />5 <br />c <br />, <br />" <br /> <br />, <br />. <br />~ <br />00 <br />. <br />" <br />.. <br />N <br />, <br />N <br /> <br />N <br />N <br />N <br />00 <br />" <br /> <br />" <br />" <br />N <br />C <br />o <br /> <br />o <br />N <br />N <br />C <br />" <br /> <br />N <br />00 <br />N <br />" <br />. <br /> <br />o <br />o <br />o <br />o <br />. <br /> <br />N <br />C <br /> <br />.. <br />ro <br />, <br />" H <br />ro H <br />o , <br />. <br />! <br />o <br />. <br />. <br /> <br />C <br />N <br />N <br />C <br />^ <br /> <br />. <br />. <br />N <br />o <br />" <br /> <br />N <br />o <br />H <br />a <br /> <br />c <br /> <br />00 <br />" <br />~ <br />o <br />roc <br /> <br />N <br />H <br />8 <br /> <br />, <br />, <br />, <br />< <br />" <br />, <br />o <br />< <br />" <br />.. <br />, <br /> <br />c <br /> <br />.. <br />N <br />c. <br />H <br /> <br />] <br />, <br />I <br />. <br />, <br />< <br />" <br />o <br />, <br />< <br />, <br />, <br />c <br />,0 <br />< <br />. <br />, <br />, <br />N <br />. <br /> <br />. <br />. <br />I <br /> <br />< <br />, <br />l <br />o <br /> <br />. <br />