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<br />This Floodplain Information Report was prepared through a cooperative <br />effort between the Town of Poncha Springs, Chaffee County, and the Water <br />Conservation 'Board. The technical considerations were prepared under the <br />supervision and direction of the undersigned whose seal as a licensed <br />professional engineer is affixed. <br /> <br />,\\\111"11" <br />'\,'\' ,~oy" A III <br />.......' l~ ~;~ Ii!,.:/) '" <br />...' ~&""!t~o. 4'. ,,~ <br />-=- ~':)o\.G\STcF(t!.,).e CL~-)' <br />~~.-~~. () e?J'.-:" <br />S .,. 011 -; <br />~ . . ~ <br />~}(.: 12191 :.>f~ <br />.... .~ '" .. <br />~ ~~ 4'. = <br />.. .0 Ill. ... <br />o;:.:j\.'flo~ ..{;i".",,:: <br />-:,......-' .'~ Ci'-....^'-l~ <br />~-;/-;..f/;/ONAL 't~o~~"...~ <br />;,.,,, m."'.... Q"'" ,'" <br />"'",Or co\.: \\\", <br />111111111\\\\ <br /> <br />~.<; (UlQ] <br /> <br />WATER RESOURCES CONSULTANTS, INC. <br />A, S. Andrews, P.E. <br />President <br /> <br />The following individuals contributed to the preparation and completion <br />of this report: <br /> <br />Mrs. Sara N. Dougherty <br /> <br />Town Clerk/Town of Poncha Springs <br /> <br />Mr. Robert E, Stotler <br /> <br />County Administrator/Chaffee County <br /> <br />Mr. Larry F. Lang <br /> <br />Chief of Flood Control and Conservation <br />Section/ Colorado Water Conservation Board <br /> <br />Mr. William P. Stanton <br /> <br />Senior Water Resources Specialist/Colorado <br />Water Conservation Board <br /> <br />Mr. A. S. Andrews <br /> <br />Project Manager/WRC,Inc. <br /> <br />Mr. Darrell R, Hogan <br /> <br />Hydrologic Analysis/WRC,Inc. <br /> <br />Mr. J. W. Nelson <br /> <br />Hydraulic AnalysislWRC,Inc, <br /> <br />Mr. Ronald L. Kamstra <br /> <br />Drafting/WRC,Inc. <br /> <br />Mrs. Nancy S, Andrews <br /> <br />Cover Artist and Technical Typist/WRC,Inc. <br /> <br /> <br />TABLE OF CONTENTS <br /> <br />List of Figures and Plates <br />List of Tables <br /> <br />Preface <br /> <br />CHAPTER I - INTRODUCTION <br /> <br />Authorization <br />Purpose and Scope <br />Mapping and Surveys <br />Acknowledgements <br /> <br />CHAPTER II - STUDY AREA DESCRIPTION <br /> <br />I <br /> <br />Location <br />Drainage Basins <br />Characteristics of Different Reaches <br />Climate <br /> <br />I <br /> <br />CHAPTER III - HISTORY OF FLOODING <br /> <br />I <br /> <br />Excerpts from Local Papers <br />and Local Input <br /> <br />I <br /> <br />CHAPTER IV - HYDROLOGIC ANALYSIS <br /> <br />I <br /> <br />Flood Characteristics <br />Methods of Analysis <br />Hydrologic Analysis and Peak Discharges <br /> <br />I <br /> <br />CHAPTER_ V - HYDRAULIC ANALYSlS <br /> <br />I <br /> <br />CHAPTER VI - INTERPRETATION AND USE OF REPORT DATA <br /> <br />Flood Frequency and Discharge <br />Flooded Areas <br />Flood Elevations <br /> <br />I <br /> <br />I <br />I <br /> <br />GLOSSARY <br /> <br />BIBLIOGRAPHY <br /> <br />I <br /> <br />- <br /> <br />Page <br /> <br />1 <br /> <br />2 <br /> <br />2 <br />3 <br />4 <br />4 <br /> <br />6 <br /> <br />6 <br />6 <br />7 <br />8 <br /> <br />10 <br /> <br />11-14 <br /> <br />15 <br />15 <br />15 <br />15 <br /> <br />20 <br /> <br />28 <br /> <br />28 <br />29 <br />29 <br /> <br />32 <br /> <br />36 <br />