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<br />PREFACE <br /> <br />Weather Service, Soil COnservation Service, Colorado Water Conser- <br />vationBoard,ColoradoHighwayDepartnlent, Lasll.nirnasplanning <br />Commission, City .of Trinidad, Chamber of commerce, State Historical <br />SOciety of Colorado, Chronicle-News, Aultman Studios and numerous <br />private citizens in supplying useful data are appreciated and grate- <br />fully acknOwledged. <br />All elevations appearing in this report are based on <br />U.S. coast and Geodetic Survey 1929 mean sea level datum. The actual <br />limits of overflow areas on the ground may vary slightly fr~ those <br />depicted on various plate illustrations in the repor~ because )f map <br />scale limitations which do not permit precise plotting of the flooded <br />area boundaries. <br />An informative brochure, entitled "f'loods on the purga- <br />toire River and Tributaries - Trinidad, colorado," has been prepared <br />to accompany the report. Copies of the brochure, this report and <br />related information can be obtained from the office of the City <br />M4nager in Trinidad and from the Colorado water Conservation Board <br />in Denver, Colorado. The Albuquerque District of the Corps of Engi- <br />neers will, upon request, prOVide interpretation and limited technical <br />assistance in use of the information contained herein. <br /> <br />The purpose of this report is to furnish information on <br />the flood hazard areas adjacent to the Purgatoire River and its <br />tributaries in Trinidad, Colorado and vicinity. As depicted on Plate <br />1, the study area enco~passes 21.8 miles of channel, including 7.6 <br />miles of the purgatoire River extending downstream from the Trinidad <br />Oa~, 4.4 miles of Raton Creek's lower channel through Starkville and <br />9.8 miles of various smaller tributaries. <br />Information provided in this report is designed to pro- <br />vide local government agencies, commercial interests and concerned <br />citizens in the Trinidad area with definitive data that will aid in <br />planning the best use of flood prone lands and contribute to the <br />solution of local flood problems. Aside from serving as a tool for <br />improving flood plain management, the report can be helpful in <br />locating and designing bridges and roads, establishing criteria for <br />flcodproofing; and deterMining where structural protective works <br />should be considered. The decision-makinq process must consider the <br />existing environmental attributes of the flood plain areas and eval- <br />uate their probable role in the community's planned future growth. <br />The report includes information On historic floods, <br />current flooC situatio~ and o~ the nature and extent of Frchablc <br />future floods which can be reasonably expected on the respective <br />, <br />study reaches, The concluding section provides guidance on various <br />fiood piain management techniques that could be adopted in a realistic <br />flood damage reduction program. The report does not contain specific <br />plans or recommendations for the solution of flood problems as these <br />are, in most instances, the responsibility of local government. <br />The report was prepared at the request of the city of <br />Trinidad, through the state of Colorado Water Conservation Board, <br />under the continuing authority granted by Section 206 of the 1960 <br />1'100<1 Control Act, as ",mended. 'rhA a~~ist"nce and cooperation of <br /> <br />the U.S. ~ational Oceanic and Atmospheric Administration (~OAA) <br /> <br />" <br /> <br />"' <br />