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<br />TA.BLE4
<br />Project
<br />
<br />_. Average Annual Inundation and Scour Damages, Standard
<br />Flood Plains, Fountain Creek at Pueblo and Arkansas River,
<br />Pueblo to Las Ani~as (January 1969 prices)
<br />
<br />the flood plain by means of zoning and subdivision regulations, and
<br />appropriate structural adaptations in building codes. The existence
<br />of highly developed urban and industrial areas in the I'ueblo flo od
<br />plain, together with complex transportation, communication, and
<br />utility systems, makes permanent evacuation or relocation of improve_
<br />ments impracticable. Therefore, a combination of nonstructural con-
<br />trol measures and construction of flood protection works would consti-
<br />tute the most effective approach to flood loss management in the
<br />Fountain Creek flood plain at and in the vicinity of Pueblo.
<br />
<br /> Urban Transpor-
<br /> >oJ tation
<br />Lands and 1m rovements Suburban Facilities Rural Total
<br />Fountain Creek at Pueblo:
<br />Existing development $452,320 $41,270 0 $493,590
<br />Allowance for future 317,750 24,100 0 341,850
<br />growth "
<br />Subtotal 770,070 65,370 835,440
<br />Arkansas River - Pueblo
<br />to Las Anillla~:
<br />Existing development 172,180 419,190 787,420 1,378,790
<br />A!1owanceforfuture 47,310 11R,230 427,370 602,910
<br />growth
<br />Subtotal 219,490 547,420 1,214,790 1,981,700
<br />ToralDarnages 989,560 612,790 1,214,790 2,817.140
<br />
<br />9. PROJECT FORMULAT70~.- Formulation and evaluatlon of a res~
<br />ervoirprojcct on Fountain Creek "'ere carried out recognizing the
<br />various needs for water resources development, State water rlghts, and
<br />Federal laws, policies and procedures. Paramount among thesc were the
<br />requirements that any project recommended for further development of
<br />the water resources of the area would: (a) consider all water resources
<br />needs of the area; (b) yield average annual benefits greater than annual
<br />charges; and (e) comply with the water Laws of the State of COlorado and
<br />l'r"vbion~ of tlL~ Arkansa$ Rlver Compact. Since the area subject to
<br />flooding at Pueblo is urban in nature and there is a threat to human
<br />life from floods of catastrophic proportions, it was concluded that
<br />standard project flood protection should be provided on Fountain Creek
<br />if found to be economically feasible and desired by local interests
<br />
<br />11. CHANNELIZATION PLAN COnSIDERED.- The local protection project
<br />for channelization of Fountain Creek at Pueblo, as presented in the
<br />main report, was reanalyzed. in view of increasing the scope of the
<br />project to provide standard project flood protection (225,000 c.f.s.).
<br />The potential plan would consist of a channel 300 feet wide, 16 feet
<br />deep, and 5 miles long, lined with concrete 8 to 12 inches thick. A
<br />minimum width of 300 feet would be required because of the proximity
<br />of industrial areas and other developments along Fountain Creek. The
<br />first cost waS estimated at $26,601,000 with annual charges of
<br />$,471,000, and average annual benefits of $1,066;280. The benefit-
<br />cost ratio of this project would be 0.7.
<br />12. The reanalysis of the flood potential of Fountain Creek
<br />indicates that the project recommended in the main report would not
<br />provide an adequatc degree of flood protection for the business and
<br />urban area in the expanded flood plain at Pueblo. Provision of
<br />standard project flood protection by meanS of a wider channel would
<br />be impractical because extensive relocation of the numerous highway
<br />and railroad bridges would be required. Furthermore, local interests
<br />have indicated that they do not desire concrete-lined channels. For
<br />these reasons, no further consideration was given to this type of
<br />improvement.
<br />
<br />n. RESERVOIRS COIISID/:;Jrf,'D.- V..rious sizes of reservoirs and
<br />locations of dams were considered including the Pinon and College
<br />sites en Fountain Creek upstre~T. fr~ Pueblo. The sites are sho~~ on
<br />Plate 1. Projects considered are described in detail Attachment I
<br />and sUlll1llarizedas follows:
<br />
<br />10. iiONS':'RUC'1URAL MEASURES CONSIDERED.- A flood plain inform..tion
<br />report On the Founta.n Creek overflow area at and in the vicinity of
<br />Pueblo was presented to local interests by the Albuquerque District
<br />Engineer in December 1968. This study waS made to assist the City of
<br />Pueblo and the Pueblo Regional Planning Commission in solving local
<br />flood problcms and to detcrminc the best use of land subject to over.
<br />flow. This report lndicated that local planning progr~s shouiJ io-
<br />ciude instructions for disaster opcrations, cootrollcddevelo pmcnt I"
<br />
<br />a. Pi~n site.- Both on-strea~ and off-stream reservoirs
<br />were considered at the Pinon site, located about 8 miles north of the
<br />Pueblo city limits~ It WaS determined that the costs of the diversion
<br />structure and embankments required for the off_stream project would be
<br />exccssive. The on_stream reservoir would require extensive grade raises
<br />of two railroads and the 4_lane interstate highway in order to provide
<br />~hc deSirable degree of flood protection for urban areas. Therefore,
<br />1t was conCluded that detailed studies of these sites werc unwarranted.
<br />
<br />miles
<br />
<br />b
<br />north
<br />
<br />CoZteqe site._ The College Jarnsite is
<br />of the Pueblo eity limits. Areservoir
<br />
<br />located
<br />atthlS
<br />
<br />aboutl,S
<br />sitcwould
<br />
<br />5
<br />
<br />b
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