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Conservation Board. The assistance and cooperation of the U.s. National OCeanic and Atmospherio Administration Weather Service, the State of Colorado Water Conservation Board, the U.S. Bureau of Reclamation, the Pueblo Regional Planning Commission, the City of Pueblo, the Civil Defense kgency, the C.F. & 1. Steel Corporation, The Chieftain-Star Journal, and private citizens in supplying use- ful data are appreciated and gratefully acknowledged. All elevations appearing in this report are based on U.S. Coast and Geodetic Survey 1929 mean sea level datum (adjusted 1961). Contour lines of the U.S.C.S. maps used as background in the FlooiOedAreaplates have a stated accuracy of Ij2 contour in- terval. When plotting flood plain outlines it was found that field sections superimposed on the U.S.C.S. maps seldom a~reed with elevations indicated by the contour lines. To avoid conflict, elevations have been removed from the contour lines. The contours BACKGROUND lNFORMATION . . Settlement . Pueblo, the county seat of Pueblo County in south- central Colorado, is located at the confluence of the Arkansas River and Fountain Creek. Economic development in the area began in 1762 when French fur trappers erected a s~ll trading post on the cast bank Of Fountain Creek. In 1806, Zebulon Pike constructed a crude building that "as the first to be inhabited by Americans. "Fort Pueblo" was built in the yeus 1840-1843. A winter camp was established by gold prospectors in 1858 and over thirty cabins were constructed using materials from the original old Fort Pueblo. The gold discoveries of 1859 drew thousands of new settlers, many of whom sent for their families. In 1861 the Colorado Territory was created and Pueblo County was one of the original seventeen counties included in the territory. 1n 1870, five hundred 'pioneers incorporated the town. Schools and newspapers were soon establisbed. In 1872 t~ Denver and Rio Grande Western Railroad began serving the City followed "ithin fifteen years by three other ~jor railroad lines. During this period the town developed into a thriving agricultural, business, and industrial center. In 1879 Pueblo's strategic looation won for it the selection as the site ~~ th~ fir~t w~~t~rn ~t~~l mill when C.F. & I. themselves can be considered to accurately represent geographic features, but should not be used to dete~ine flood surface eleva- tions. In areas where recent developments have altered contours and geogr~hic features, invalid contours have been taken out. U.S.G.S. field checked spot elevations have been retained wherever possible and are reliable to + 2 feet. These, however, should not be used to infer actual elevations for contour lines. I>n informative brochure, entitled, "Si><mileCreek . Steel Corporation was founded. Availability of fuel and mineral deposits supported diverse mining operations and associated commerCe and industry. Agri- cultural and related food processing industries dominated economic development from the beginning of the 20th century until World war 11. Economic'development during and since World War II has been character- i~ed by steady growth in 'the manufacturing sector, continuance of military activities at the Pueblo Ordinance Depot, and expansion of supporting mercantile and service industries. Floods in Vicinity of Pueblo, COlOrado," has been prepared to accompany this report. Copies of the brochure, this report, and related tnformation can. be obtained from the office of the Pueblo Regional Planning Commission, Pueblo, Colorado and from the Colorado Water conservation Board in Denver, Colorado. The Albuquerque District of the Corps of Engineers will, upon request, provide interpretation and limited technical assistance in use of the information contained herein. . . . '" ,