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FLOOD08449
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Last modified
1/25/2010 7:14:36 PM
Creation date
10/5/2006 3:37:32 AM
Metadata
Fields
Template:
Floodplain Documents
County
Bent
Community
Bent County
Basin
Arkansas
Title
Lower Arkansas River Watershed and Flood Mitigation Plan for Bent County
Date
10/1/2000
Prepared For
Bent County
Prepared By
CWCB
Floodplain - Doc Type
Flood Mitigation/Flood Warning/Watershed Restoration
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<br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />experienced during the 1942 flood. The peak flow of record (70,000 c,f.s.) on the Purgatoire River near <br />Las Animas was established on 20 May. 1955. The Arkansas River flood peak at Pueblo was established <br />on 20 May 1955. The ArkaffiaS River flood peak at Pueblo was 11.100 c.f.s. As the flood progressed <br />downstream, the peak increased to 50,000 c.r.s. at La Junta and caused major flood damage to North La <br />Junta, a residential area across the ri....er from La Junta. At Las Animas the peak measured 44,000 c.r.s. <br />but due to a very sUlXcssfu) flood fight.., no serious flooding occurred at Las Animas. The peak inflow to <br />John Martin Reservoir was 88.000 c.r.s. and the flood volume at the reservoir was 260.000 acre-feet. <br /> <br />Ver}' little inflow was produced by the upper tributaries. Fountain Creek had a peak discharge of about <br />5.000 c.f.s. at the mouth. The 51. Charles Rh'er had a peak of about 20,000 c.f.s. at the mouth. The peak <br />discharge of the Huerfano River near Undcrcliffe was 11.300 c.fs. The peak discharge of the Apishapa <br />River near Fowler was 17.000 c.f.s. and for Timpas Creek near Rocky Ford. the peak flow was 7.500 <br />c.f.s. <br /> <br />I <br />I <br />I <br />I <br />I <br /> <br />Flood of June 1965 - The flood-producing rains of 13-19 June 1965 were the culmination ofa strong and <br />persistent weather pattern which existed over the .....estern United States for about 4 months. The general <br />pattern of the upper level windflow was out of the Gulf of Alaska. down the west coast, across southern <br />California. back up through Arizona and New Mexico, and over the high plains. This general pattern of <br />upper air circulation was present throughout the storm period and was most pronounced on 16-17 June <br />with unseasonably cool air aloft at 20.000 fect. By 14 June. the increasing surface pressures over the <br />central plains coupled with a low-pressure area centered over Chihuahua, Mexico. induced an inflow of <br />moist Gulf air into northwestern New Mexico and eastern Colorado. damming it up against the Rocky <br />Mountains beneath the cold air aloft. This combination of surface and upper air conditions resulted in <br />extremely unstable atmospheric conditions. and reinforced by mechanical lifting (due to the upslope of <br />the terrain) and convergence (due to the low-level pressure pattern), produced phenomenal rains. <br /> <br />flev-C of ~V-J\A^j \",qq. <br />-4 r \"- <br /> <br />I <br />I <br /> <br />I <br />I <br />I <br />I <br /> <br />I <br /> <br />I <br /> <br />PAGE _~_ <br />
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