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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 /> <br />l)<llJn'" <br />....QJ~ <br /> <br />TABLE OF CONTENTS (Cont'd) <br /> <br />Retention Losses <br /> <br />. . . . . . . . . <br /> <br />Antecedent Moisture Conditions , <br /> <br />Use of Different Land Use and Soil <br />Characteristics .- . . . . <br /> <br />Land Use Characteristics <br />Soil Characteristics . . <br /> <br />Minimum Retention Loss Rates (fc) <br /> <br />Values Used by USBR <br />Chatfield Study Values <br />Forest Service and SCS Discussions <br />Other fc Data, , . . , <br />Revised CN for MU Areas <br />Revised Values of fc ' . <br />Revised PE Due to Changes in CN and fc <br /> <br />Other Potential Reductions to Flood Volumes <br /> <br />Non-Contributing Drainage Areas <br /> <br />Reductions in Narrows Inflow Due to Upstream <br />Storage , . . . . , . , . <br /> <br />Water Supply Res'ervoirs <br />Flood Control Reservoirs <br /> <br />Effect of Subdividing Drainage Area <br /> <br />Area Above Two Forks Damsite <br />MU Areas . " . . . . , . , . <br /> <br />Effects That Have Been Disregarded in This Study <br /> <br />Effect of Rainfall Falling on Narrows Reservoir <br />Area . . . . , . , . <br /> <br />Effect of Channel Losses <br /> <br /> <br />Summary of Results . . , <br /> <br /> <br />Comparison with Historical Floods <br /> <br /> <br />Flood Envelopes <br /> <br /> <br />Frequency Curves <br /> <br />CHAPTER IV - REVIEW OF DAM, RESERVOIR AND SPILLWAY <br />DESIGN <br /> <br />IntroducU,on <br /> <br />I <br />I <br />I <br /> <br />Project Features <br /> <br />USBR Feasibility Study <br />Economic Study <br />Costs <br /> <br />ii <br /> <br />Page <br />III-8 <br />III-9 <br /> <br />III-9 <br /> <br />1II-9 <br />III-12 <br /> <br />III-16 <br /> <br />III-16 <br />III-16 <br />III-18 <br />III-18 <br />III-19 <br />III-2D <br />III-22 <br /> <br />III-22 <br /> <br />1II-22 <br /> <br />III-22 <br /> <br />1II-23 <br />III-23 <br /> <br />1II-26 <br /> <br />1II-27 <br />III-27 <br /> <br />1II-28 <br /> <br />1II-28 <br />III-29 <br />III-3D <br />III-3D <br />III-3D <br />1II-31 <br /> <br />IV-I <br />IV-,l <br />IV-I <br />IV-I <br />IV-2 <br />IV-3 <br />