|
<br />
<br /> TABLE 4
<br /> OBSTRUCTIVE STREAM CROSSINGS'
<br /> Elovalion'
<br /> Under- TOpol 100-year 51111-year
<br />Identilicatlon Locallo"' Slreambed clearance' Roadway' Flood Flood
<br /> COLORADO RIVER
<br />State Highway 340: ''''
<br />Now 373.93 4459 4479 4484 4431
<br />Old 374.45 4464 4433 4437 4483 "86
<br /> REED WASH
<br />DRGWRR 10.280 4458 4471 4478 4471 4478
<br />U.s. Highway 6-50 10,400 "" 4471 4474 4471 4478
<br /> BIG SALT WASH
<br />Interstate 70:
<br />Eastbound Lanes 370 4459 4471 4474 4472 4475
<br />We~tbound Lanes 475 4459 4471 4474 4473 4476
<br />DRGWRR 2,525 4465 "82 4490 4480 4489
<br />U.S. Highway 6.50 2,650 4467 44" 4480 4482 4489
<br />17 Road 9,050 4495 '''' 4512 4508 4514
<br /> LITTLE SALT WASH
<br />Interstate 70:
<br />Eastbound Lanes 1.575 4467 4479 4482 4477 4478
<br />Westbound Lanes 1,575 . 4467 4479 4482 4478 4480
<br />DnGWRR 2,725 4471 448~ 4493 "" 4489
<br />U,S, Highway6-SO* 2.915 4472 4485 4488 4484 ""
<br />Ottley Drive 4.875 4482 4498 4500 4497 4501
<br />17-J.:Road 6,475 4489 4507 4509 4501 4505
<br />1n~Road 7,960 4496 45H, 4518 4509 4514
<br />18 Rood 11,325 4518 4532 4535 "'8 4533
<br />18-j4 Road 15,275 4544 456~ 4565 4561 4S67
<br />'Culvorls.",dosigMlcdb)",
<br />I Atth.upstr.."'I....otlh..truelu...(..""'tlortoporrOlld..."-"}rourtdedtoth.n.ar..ttoot.m.a....I...ldalu""
<br />, Mil.. ul"t",am from Lo,o. Ferry, Ari",,"". on the Colorado River: r..t up>lream from moulh 00 tributary .1....",..
<br />, l.(lw.t<el"tlow"lpo;nton.tru.tu...f"".1ilyP<'"orbridl:<.x..pt~..h,Toporop"nin!l:atmid-<lp"oon""hbridAA,.n,1
<br />oul......
<br />, At theo'nlor lin" of roacl Imm,dia:<i)'a!>ov. ""d,,.loaranoe po;nt_
<br />
<br />8
<br />
<br />
<br />I
<br />I
<br />I
<br />I
<br />I
<br />I
<br />I
<br />I
<br />I
<br />I
<br />I
<br />I
<br />I
<br />I
<br />I
<br />I
<br />
<br />I
<br />I
<br />
<br />~
<br />,
<br />I
<br />I
<br />I
<br />I
<br />I
<br />I
<br />I
<br />I
<br />I
<br />I
<br />I
<br />,
<br />1
<br />
<br />TABLE 5
<br />
<br />AVERAGE VELOCITIES OF FLOW
<br />111I).YEARFLOOO
<br />
<br />Stream
<br />CQloradoRiver
<br />Reed Wash
<br />Big Salt Wash
<br />L1tl1eSallWash
<br />
<br />a residential section in the northwestern
<br />corner of Fruita.
<br />The 100..year flood would inund&te about
<br />3.720 acres, of which &bout 3.000 a~res arc
<br />agricultural Or open land~. 20 acres are urban,
<br />and 700aeres arestreamway.
<br />
<br />FLOOD DAMAGES
<br />
<br />Damagesresultingfromaloo..or500.year
<br />flood would be mainly to agri~ullural and
<br />undeveloped lands, residential areas,and
<br />public facilities. Residential losse~ would
<br />comprisedamagetofoundations.!owerfloors,
<br />walls, furnishing.;, appliances, and lawns and
<br />gardens. Agricultural los-'<eS would consist of
<br />erosion,lossofcrops,andc1earingfieldS
<br />covered with debris &nd silt. Public facility
<br />losses would involve dam&gc to roads, bridges,
<br />culverls.irrigationsystems,andhi!l;hwavand
<br />
<br />Velocl1y
<br />(Ieetpersecond)
<br />Main Channel Overbank Areas
<br />
<br />'-9
<br />8-10
<br />~,
<br />8-12
<br />
<br />'-3
<br />'-3
<br />>-3
<br />'-2
<br />
<br />The pattern of flooding along the streams
<br />under 5tudy would be similar for both thc 100-
<br />and 500-year floods, though 500-year
<br />flood flows would extend farther from the
<br />channel and would lJedeeper.
<br />
<br />railroad embankment. Other flood lo~se.
<br />would include the cost or flood fighting and
<br />post flood cleanup and restoration,
<br />Damage would be greater during a 500-
<br />ycar flood than durinll' a lOO-year flood due to
<br />the wider flood plain, greater depth of
<br />flooding, and hil'(her vel(>City of flow,
<br />The depth of flow in the various channels
<br />and adjacent flooded areas can be determined
<br />from the water surface profiles shown on
<br />Pllltes43-55.
<br />
<br />9
<br />
<br />I
<br />
|