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<br />Manreade obstructions to floodflow in La Junta include <br />bridges and their approach embankments. Most of the br.dges over <br />King and Anderson Arroyos are obstructive to floods of the 25-year <br />magnitude and all are obstructive to the 100-year flood. The capa- <br />bilities of King and Anderson Arroyos to convey !loodflows through <br />La Junta are also hampered by encroachments on the waterways and <br />under-designed bridges. <br />Future flood crests and pertinent elevations at bridge <br />and culvert crossings within the study area are listed in Table 4. <br /> <br /> ,~ , <br /> FLOODWJl.TER SURFACE ELEVATtoNS <br /> ARKANSAS RlVER AND TRIBUTARIES <br /> LAJ'"..JNTA, COLORADO & VICINITY <br /> Cross Elevation '" Feet (MSL) <br /> Se~tion 25-YR 50-YR 100-YR '" <br /> ARKANSAS RIVER <br /> '" 4042.1 4043.0 4043.9 404"}.3 <br /> He 4046.1 4047.1 4047.1 4050.0 <br /> m 4048.4 4048.5 4049.3 4052.9 <br /> '" 4050.0 4051.0 4052.1 40%.2 <br /> '" 4051.6 4052.7 4053.8 405"}.9 <br /> no 4053.2 4054.3 4055.4 4059.6 <br /> m 4053.4 4054.4 4055.6 4059.7 <br /> HO 4055.1 4056.3 4057.5 4061.9 <br />I <br />, <br />, '" 4058.0 4059.3 4060.5 4064.6 <br />, <br />, '" 4060.4 4062.0 4063.5 4067.6 <br />, <br /> m 4060.8 4062.3 4063.9 4068.0 <br /> '" 4061.4 4063.0 4064.5 4068.8 <br /> '" 4065.5 4066.8 4068.1 4072.6 <br /> no 4068.4 4069.7 4071.0 4075.7 <br /> 175 4070.6 4072.0 4073.4 4078.2 <br /> '" 10"}4.2 4075.6 4076.9 4081.5 <br /> nNGARROYO <br /> 2015 y 4049.9 4050.5 4051.2 <br /> 2020 Y 4050.0 4050.6 4051.3 <br /> 2030 " 4050.4 4051.8 4n~4. 1 <br /> ~ <br /> 2040 Y 4050.4 4051.8 4054.4 <br /> 2050 Y 4050.4 4051.8 4054.6 <br /> 2060 Y 4050.5 4051.9 4054.7 <br /> 2070 Y 4052.4 4053.6 4055.6 <br /> 2080 4054.0 1055.3 4056.8 <br /> 2090 4054.8 4055.9 405~.9 <br /> 2100 4057.4 4056.0 4059.0 <br /> 2110 4060.2 4061.7 4063.2 <br /> 2120 4161.5 4063.2 4064.9 <br /> <br />y f:1",vatiQn" do ".ot r"Oect b..ckwater effect" from Ark"n~"" River <br /> <br />n <br /> <br />n <br />