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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />as stated in Section 30-28-111 and 31-23-301 of the Colorado <br />Revised Statutes, <br /> <br />Therefore, upon official approval of this report by the <br />Colorado Water Conservation Board, the areas described as being <br />inundated by the 100-year flood can be designated as <br />approximate flood hazard areas and their use regulated <br />accordingly by Costilla County. <br /> <br />1.3 Acknow1edqments <br /> <br />The assistance and cooperation of the individuals. <br />agencies, firms. and organizations listed below in supplying <br />information are appreciated and gratefully acknowledged: <br /> <br />Larry F. Lang - Chief. Flood Control & Floodplain <br />Management Section. Colorado Water <br />Conservation Board <br /> <br />William P. Stanton - Supervising Water Resource Specialist <br />Colorado Water Conservation Board <br /> <br />Brian R. Hyde - Senior Water Resource Specialist <br />Colorado Water Conservation Board <br /> <br />Dr. Donald Doehring - Colorado State University. <br />Department of Earth Resources <br /> <br />Maclovio Gallegos - Costilla County Administrator <br /> <br />Prax Ortega - Costilla County Emergency Services <br />Director <br /> <br />Dennis Heller - WRC Engineering, Inc. <br /> <br />Joseph Gallegos - Resident of Costilla County <br /> <br />1.4 Related Flood Studies <br /> <br />A series of Maps of Flood Prone Areas, providing <br />approximate floodplain delineations throughout the San Luis <br />Valley, was prepared under the supervision of Dr. Donald <br />Doehring of the Colorado State University Department of Earth <br />Resources in 1974 for the San Luis Valley Council of <br />Governments (now disbanded). These maps were based on <br />statistical analyses of stream gage records. relatively widely <br />spaced field-surveyed cross sections, hand calculations of '~ <br />flood depths at those cross-sections, and a field review of the <br />preliminary floodplain delineations. In Costilla County <br />portions of the Rio Grande, Culebra Creek, and Rito Seco were <br />studied. The delineations for the Rio Grande have been <br /> <br />-2- <br />