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<br />TABLE OF CONTENTS <br /> <br />P/I.GE <br /> <br />CHAPTER 1 HISTORIC FLOOD DAMAGES AND CAUSES OF FLOODS <br /> <br />Historic Flood Damages ....,..'.....................,....,......... <br />Causes of Floods............. .. ' .,. .... ....... ........ .. ,., ......... <br />Precipitation Caused Floods.. ... ....... ..................., ......... <br /> <br />General rain floOdS ...,........... ,. . . , . . .. . . . .. '" . . . . . ., . . ... . . . . <br />Thunderstorm :Ioods ... . . . . . ., . ". . ,. . . . .. .. . . ... ... . . . . . ., . . . .. , " . <br />Snowmelt floQ(js ..............".. '.. . ... . . .. ... .... . ... .. . . . .. . .. . <br />Rain on snov.' Hoods ........... " . . . . .. . . .. , . . . . '" ... . , . . . .. . ... . <br />Ice Jam floods. . . . . . . . . .. . . . . . . " " . . . . , . . . . . . . . . . ... . ... . . . . .. , ... <br />Dam Failure Foods........... "......... ............., ......... <br /> <br />CHAPTER 2 LEGAL ASPECTS OF FLOODPLAIN MANAGEMENT <br />Federal and State Legislation ,'.. ..."......................, .. ....... <br />Legal Principl.:!s .............."......'......................,......... <br />Constitutionality.............., .....,..........,..........., ......... .... <br />The "Pinpoint' approach.......,....."......................, ....,.... .... <br />Relevant court cases........."............................, ......... .... <br />Liability of government agencies constructing flood control or drainage <br />facilities......................"....."......................,............ . <br />Legal Basis for Dam Safety Programs in Colorado........, ......... ,... <br />Colorado Division of Water Resources .....................,............. <br />Hazard Classi':ications ........, . . ... . .. . ... .. . ... .. . ... .. . . , . . . . . . . . . . . .. <br />Judicial Notice of Floodplains and Wetlands.,........... , ............. <br />Citations forC,:)urtCasesthat May Be of Interestto Floodplain Managers <br />and Their Legal Counsel....., ..... , ....................... ......... <br /> <br />CHAPTER 3 IDE NTIFICATION OF THE FLOODPLAIN................ <br />The Role of Floodplain Identificaltion in a Local Floodplain <br />Management I'rogram ............................................... <br />Procedures and Methods .....,...................................... <br />Approximate studies........... ,.......................... ............ <br />Detailed studiHS ...............,..................................... < <br />Floodplain information studies ............................................. <br />Base mappin<;;l .. . . . . . . . . . . . . . , . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . , . <br />Field surveys. " . .. . . .. . .. . .. . . , . .. . . . . . . . . .. . . . . . . .. . .. . . .. . . . . . . . . .. . , . <br />Hydrologic methods ...................................................,. <br />Hydraulic determinations................... .............................. <br />Floodplain de ineations and datum con~,;stency ............................. <br /> <br />Floodways . . . . . . . . .. . . . . .. . . . ... . . . . . . . . . . , .. . . . . .. . .. . .. . . . . . . . . . . . . . , . <br />Mapping dam failure flood zones.......,.........................,... <br />Master drainaqeway planning studies...... ,.. .. .......... ..., ......., '" <br />Base mapping 3.nd field surveys .."....,.................................... <br />Hydrologic methods ............".........."....,....,............. <br />Hydraulic determinations......,..,..... ... ." " .......... . .... ....... <br />FloOdplain delilleations ........."...........,....,......,...,.....,. <br /> <br />Floodways . . . . . . . . . . . . . . . . . . . . . " . . . . . . . . . . . , . . . . . . . . . . . , . . . . . . . . " . . <br />Problem and damage assessments ...........'.......................,..,.. <br />Plan formulation.. . . . . .. . .. . . . . ." . ... . .. . .. . , . . . . . . .. . . . , .. . . . . . .. . . ". . , . . <br />Plan selection , . . . . . . . . . . . . . . . . . " . . . . . . . . . . . ' . . . . . . . . . . . . . . . . . . . . . . . <br />Status of FloOdplain Studies in Colorado. .......................,...'. <br /> <br />CHAPTER 4 Fl.OODPLAIN MANAGEMENT ALTERNATiVES.,........... <br /> <br />Preventive Measures (Non-StrLlcturHI Approaches)....... ... ..... ,.. <br />Land use regulations.........., .....,. ....".... ......, ... ..,..,. ...... ,.. <br />Zoning...... ................ ... ..........,. , ..,.............. ... ......,.. <br />Subdivision ....................,.....,..................................,.. <br />Planned Unit Development ........................".................."..,... <br />Building codes .................,..................................."..... <br />H.B. 1041 perrr it system (Section 24-65.' -1 01 et seq. CRS 1973, as amendE~d) . . . <br />Development policies...... .. . .. . ... ........ . ..... ....................... <br />Open Space ....................................................... <br />Public services and facilities .....,..................................."..". <br />Taxation, .. . . , ... .. . . . . . .. . . . . . , . ... . .. . . . . . . . . .. . . . .. . . .. . . . . .. . ...' ... . . <br />Urban Renewal.. ........... ..,.. .......... .. ... ......... ,.., ............ . <br />Fee structure for flood control and storm (jralnage facilities.."........,., <br />Flood insurance...... ........ .. . .........., .... _........... .......".... . <br />Emergency pmparedness .......,....,....,............,.........,.'..... <br />F!ood forecasti 19 . . . . . . . . .. . . . . . , , . . . . . . . . . . . . . . .. . .. . . . . . . . . . . . . . . , .. .. , . <br />Flood Warnlrl9 ...............,... ....... ...., .......... .............. <br />Flood warning systems...... .. ......... ... .. ... ....... .. .. ..... .,., , <br />Means of diss~minalion ......................... _................... <br /> <br />Evacuation .............................................,........... <br />Education/Awareness.........".......................,.......... . <br /> <br />2 <br />3 <br />3 <br />3 <br />3 <br />3 <br />4 <br /> <br />4 <br /> <br />8 <br />8 <br />'0 <br /> <br />11 <br /> <br />11 <br /> <br />11 <br />12 <br />13 <br /> <br />13 <br /> <br />15 <br /> <br />'5 <br />15 <br />15 <br />17 <br />17 <br />17 <br />18 <br />'8 <br />19 <br />20 <br />21 <br />22 <br />23 <br />23 <br />23 <br />23 <br />23 <br />23 <br />23 <br />23 <br />24 <br />'4 <br /> <br />25 <br /> <br />25 <br /> <br />25 <br /> <br />2S <br />26 <br />26 <br />26 <br />27 <br />27 <br />27 <br />28 <br />28 <br />28 <br />28 <br />29 <br />29 <br />30 <br />20 <br />';:,0 <br />30 <br /> <br />32 <br />