FLOOD11630 ‎(2)‎

• County: Statewide
• Basin: Arkansas
• Title: Post Flood Assessment Report - Arkansas River
• Date: 9/15/1999
• Floodplain - Doc Type: Flood Documentation Report

wing dam. This berm also serves to provide access in this area
Railroad Embankment: During a field inspection of the reservoir on May 6, 1999, John Martin
Project Office personnel discovered a slide on the Burlington Northern - Santa FE; (BNSF)
railway embankment adjacent to the reservoir. The BNSF railway was notified of this problem
on May 6, 1999. An inspection of the reservoir on May 11, 1999 indicated that problem was
getting worse. Railroad personnel visited the site on the aftemoon of May 11, 1999.
Subsequently, the railroad placed a speed limit on all trai,ns in the area and took artion to make
the necessary repairs. The railroad dumped at least 69 train cazs of riprap at this site to stabilize
the slide. With the slope stabilized, the railroad began placing riprap in specific areas that
required protection. Incidentally, the Corps made arrangements to purchase riprap from the
railroad. The riprap will be stockpiled for future emergency use.
INTER-AGENCY COORDINATION EFFORTS
Reports and advisories addressing the potential for heavy rain were first issued eaxly on the
morning of Apri128, 1999. The Significant Weather Outlook issued at 7 AM on ~4pri128, 1999
called for potential heavy rain in the Pikes Peak region and the Upper Arkansas River Basin
between 6 PM on Apri128, 1999 and 6 AM on Apri129, 1999. A similar outlook was issued
again at noon on Apri128, 1999.
By early in the mid shift on Apri129, 1999, Urban and Small Stream Flood Advis~ries were
issued for El Paso and Pueblo Counties. Significant Weather Outlooks addressing; the heavy rain
and flooding were issued at 7 AM and noon. Around 3 PM on the afternoon of Apri129, 1999, a
Flash Flood Watch was issued for El Paso County. On the evening of Apri129, 1999, another
t3rban and Small Stream Flood Advisory was issued for El Paso County around 7 PM followed
by a Flash Flood Warning around 9 PM.
Early in the mid shift on Apri130, 1999, a Flood Wanun~ was issued for El Paso, Pueblo, Otero,
Crowley and Bent Counties, addressing the likelihood of flooding along Fountain Creek and
along the Arkansas River from Pueblo to La Junta. Shortly after the Flood Warning was issued,
a Flash Flood Watch was issued addressing the potential for flash flooding over a large pertion of
southeast Colora.do. Around 6 AM on Apri130, 1999, the Flash Flooc`t Warning far El Paso
County was lowered as the ongoing flooding was no longer of a flashy nature. Th~e Flood
Warning remained in effect for El Paso County and much of the rest of southeast Colorado. At 7
AM on Apri130, 1999, the Significant Weather Outlook was issued a~dressing the; Flood
Wamings and Flash Flood Watches in effect for southeast Colorado. Around 9 AM on the
moming of April 30, 1999, the Flood Warning was expanded to include Fremont a~nd Custer
Counties. ~Another Significant Weather Outlook was issued around noon addressing the Flood
Warnings and Flash Flood Watches in effect for southeast Colorado. Flood Statements were
issued at regular intervals throughout the day on Apri130, 1999, addressing the Flood Warnings
and Flash Flood Watches in effect, the ongoing flooding along Fountain Creek, the ongoing and
anticipated flooding along the Arkansas, and the potential for flash flooding throu~;hout southeast
Chapter 3- Flood ofApri129, 1999
Post Flood Assessment Report ~ 25 Draft Revised 09/09/99