FLOOD04688

• County: Otero
• Community: La Junta
• Basin: Arkansas
• Title: Flood Preparedness Plan Arkansas River
• Date: 9/1/1993
• Prepared For: Otero County
• Floodplain - Doc Type: Floodplain Report/Masterplan

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every 15 minutes. The hotline requires a division and
stationi. The required inputs are division 2 and station 1
followed by an asterisk (*). However, a large flood event may
wash the gage away, so keep this in mind.

As previously stated, there is approximately 23 - 42
hours of travel time for a flood crest at Pueblo to reach the
City of La Junta. By calling the hotline (updated every 4
hours), this information may be useful in establishing a flood
travel time.

In addition, the Colorado Division of Water Resources in
Pueblo has responsibility for this gage, and can also provide
stage and other information. Their phone number is 719-542-
3368.

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4. identify the
purposes of warning
selection of emergency

Level of Threat (next Section)
dissemination (Section 4) and
response actions {Section 5\ .

for
for

3.6 Levels of Flood Threat

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The 100-year and SPF floodplains developed in the
Special Flood Hazard Information Report (reference 1) for the
Arkansas River at La Junta are used to identify the levels of
flood threat. In addition, using the developed data from the
report, the 25-year floodplain was also plotted and is
included as a "Level of Threat". Flows between 10-year and
25-year flood event are identified as LEVEL 1 and shown as a
RLLOW zone. Flows from the 25 to 100-year event are
identified as LEVEL 2 and shown as a RED zone. Flows above the
100-year to the Standard project Flood Event are identified as
LEVEL 3 and are shown as a BLllE zone.

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Plates 3-15 show the flood zones along the Arkan..a..
River located within the La Junta City Limits corre..ponding to
the different level... The flood zone.. are divided for each
inundation area and are color coded for ea..e of recognition.

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These map.. reflect conditions a.. they were in 1976.
House.. and other facilitie.. built in the floodplain since 1916
are not shown on the maps, but are 1i..ted on the addre....
notification 1i..t shown in the Appendice.. C. However, thi..
al..o i.. only current a.. of September 1993, and therefore field
per..onnel ..hould be cautioned to be on the lookout for other
structure.. a1..0 obviously located in the floodplain.

To identify the Level of Threat, the Mayor/city Council
and Otero County commi....ioner.. should con..ider the following:

1. the National Weather Service predicted flood cre..t..
and foreca..t conditions (mainly more precipitation i..
expected)

2. the existing water level heights provided by the
..potter.. at the State Route 109 Bridge at La Junta (or other
location..) ,

3. any other information available

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