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<br />TABLE OF CONTENTS <br /> <br />LIST OF TABLES, <br /> <br />LIST OF FIGURES <br /> <br />I, INTRODUCTION <br /> <br />DIRTY WOMAN CREEl\: AND CRYSTAL CREEKS <br />DRAINAGE BASIN PLANNING STUDY <br />DEVELOPMENT OF ALTERNATIVES <br /> <br />Authorization . . ' , . . <br />Purpose and Scope . . . . <br />Summary of Data Obtained <br />Mapoinq and Surveyinq . <br />ACknowledqements . . . <br /> <br />II. STUDY AREA DESCRIPTION <br /> <br />Prepared for: <br />EI Paso Cuunty Department \If Publi~ Works <br />3105 Nonh Stone <br />Colorado Springs, CO 80907 <br /> <br />I <br />, <br />! <br /> <br />Basin Description . . ' . . . , , <br />Climate, , . . . . . . . . . . . <br />Soils and Geoloqy , . . . . . . ' <br />Property Ownership and Impervious <br /> <br />Land Densities <br /> <br />....... . <br /> <br />.,....' . <br /> <br />,...,.. . <br /> <br />III. HYDROLOGIC ANALYSIS <br /> <br />Previous Studies <br />Runoff Model <br />Basin Characteristics . <br />Impervious Land Density <br />Oesiqn RaJ.nfall . . <br />Hydrolog~c Modeling , , <br />Results . . . . . ' . . <br /> <br />Prepared by: <br /> <br />IV. HYDRAULIC ANALYSIS AND FLOODPLAIN DESCRIPTION <br /> <br />Kiowa Engineering Corporation <br />419WestBijo\lS~t <br />C.oloradoSprings,CO S{}<}05.130:>; <br /> <br />Reach Delineation and Descriptions <br />Flood History . . . . . <br />Hydraulic Structure Inventory . . . <br />FlOOdolains . . ' , . . . , . , . . <br /> <br />V. EVALUATION OF CONCEPTUAL ALTERNATIVES <br /> <br />KIOWA Project No, 91,07,17 <br />D22/R12\ <br /> <br />Introduction . . . . ' , . . . . . . . . , , . . <br />Evaluation Parameters , . . ' . . . . ' , , . . . <br />Environmental Review of Sand Creek Drainage Basin <br />Preliminary Matrix of Conceptual Alternatives <br />Drainageway System Alternatives <br />Evaluation of Concepts . . . , <br />Conclusions, , , . . . . , , . . . . . . . . <br /> <br />Mavl<)<.)l <br />R.:vis.edJune 1<)92 <br /> <br />Page <br /> <br />iii <br /> <br />j,v <br /> <br />1 <br />1 <br />2 <br />2 <br />, <br /> <br />4 <br />4 <br />6 <br />6 <br /> <br />, <br />9 <br />, <br />10 <br />10 <br />11 <br />11 <br /> <br />19 <br />19 <br />19 <br />22 <br /> <br />.<:.3 <br />23 <br />24 <br />30 <br />3D <br />37 <br />41 <br />