FLOOD11630 ‎(2)‎

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

CHAPTER 4
FLOOD DAMAGES PREVENTED
AN]D
SUSTA][NED
Provide general overview on how the damages prevented and damages sustained were estimated.
Cite sources of information and potential overlaps or undervaluing factors.
DAMAGE PREVENTED
Fountain Creek and Tributaries
The Templeton Gap Channel above Monument Creek performed well despite continuing erosion
within the confluence plunge pool. There aze no other projects of flood control significance
along Monument Creek. Flows were fully contained within the channel banks downstream;
however, extensive erosion along the stream banks did occur. Despite the lack of damage due to
flooding, the streambank erosion resulted in damage to public infrastructure and l~ss of private
property into the stream.
The Fountain Creek Levees and Channelization project at Pueblo is the only significant flood
control project in this watershed. The east levee experienced some loss of riprap through a reach,
but provided protection during the entire 10-year ta 25-year flood event. The levee is designed
to contain the 200-yeaz flood event. The levee protects 46 homes, 183 businesses„ 27 public
structures, 3 apartments, and 21 storage sheds, and other outbuildings. The reside:ntial structures
and their contents have an esti.mated value of $1,511,000. The commercial structures and their
contents have an estimated value of $121,899,000. The public structures and their contents have
an estimated value of $83,646,000. The apartment structures and their contents h~ve an
estimated value of $650,000. The outbuilding structures and their contents have an estimated
value of $95,000. This is based on an approximate delineation of the 200-yeaz flood plain for a
total value of $207,791,000. Damages do not actually begin until the 50-year flood event so
during this 10-yeaz to 25-year event, the levee would not have appreciably prevented flood
damages. However, due to the high value of properties protected up to the 200-year event,
repairs are justified to restore full protection based on annualized damage prevention benefits.
The evaluation was made as part of the economic justification analysis for repair of the levee
riprap under the Public Law-84-99 program.
Arkansas River
Pueblo Dam and Floodway: The inflow to the dam and floodway system were generally
Chcrpter 4- Flood Damages Prevented and Sustained
Post Flood Assessment Report~~ 31 Draft Revised 09/09/99