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" =-=H _~ ~ 1,_ I n\ '1:-- .- T-, I:'.' f -; \ l~L "1. -, ~. ~+ 1.:\:-__=,~-~1---:..:'. ~', .' A c .,.~~ '" TO ......" '-;,v ~.I\ -.. ,~ /, / '. , T - ,- , .- ,....., , " ,II. , '0 t..f . - , -'", fi ',I" .~. '-' , " iJ,I ,- c' r , .' ~- !.f \ , .- , ,,-~ ) " '-' . '- ;':;"',l , 1I~$t' from U.S. Gwlogic~J s:-;..-;;::---nJ.....-__n---l.. I:SOO.OOOSlate h....mIP. 1969 -.; = ~ ~ .. 37. -of :",;;...- - _L "" L A H o M A o o c M c x w N E . . lCU. , 10f,' ,~. ,,,,. 'M' SCALE 1: 1 000000 25 ~ " 100 MILES -, o ~ 25 r 50 INDEX TO FLOOD-PLAIN INFORMATION IN COLORADO. JANUARY 1975 By Larry F. langG and Jerald F. McCalnb INTRODUCTION .,. This guide to the availability of flood-plain information for Colorado was prepared jointly by the Colorado Water Conservation Board and by the U.S. Geological Survey. In recent years, legisla- tion at aI' levels of governmellt and an increased general awareness of flood-plain hazards has res~lted in a marked increased interest in and requests for flood-plain information. This document is an index to that information. COLORADO WATER CONSERVATION BOARD FLOOD-PLAIN INFORMATION PROGRAM In the 1974 legislative session, the Colorado General Assembly directly attacked the flood-plain problem by describing it as a natural hazard of State interest relating to the use of land in House Bill 1041 (Title 24, Articles 65.1,32 and 65 CRS 1973. as amended). Colorado Revised Statutes 1973, Section 3760106(c) author- izes the Colorado Water Conservation Board to designate and approve storm flood-water runoff channels and to make such designations available to legislative bodies of local jurisdictions. The Board is actively engaged In assisting local governments develop and adopt. effective flood-plain ordinances. In addition, the Board assists and provides financial assistance to flood-plain Information studies in Colorado. FlOOd-plain information will help local entities formulate plans and regulations to control the use of flood plains and thereby prevent construction of works or structures subject to flood damage within the paths ~f future floods. Urban Drainage and Flood Control District In the Denver region, the Urban Drainage and Flood Control District is actively engaged I~ coordinating multljurlsdictional urban drainage activities as authorized by the 1969 Colorado $tate Legislature. The District has the power to plan, design, construct, or acquire, equip, maintain, and operate drainage facilities and can promulgate flood-plain regulations. National Flood Insurance Program The National Flood Insura~ce Program was establ ished by the National Flood Insurance Act of 1968. Authority to administer tt':.. program was delegated to the F~deral Insurance Administration (FI,l,) of the U.S. Department of Housing and Urban Development. This pro- gram makes specified amounts of flood insurance available under federal auspices. In 1969, th~ emergency flOOd insurance program ........ ..n...a..d gi...n9 th.. ~IA r....:....H.bility to dtlsignate approximate boundaries of special flood-hazard areas for cities, towns, and un- incorporated developed and developing areas. These boundaries are sufficient for flood insurance and building permits, but they are inadequate for designations for flood-plain zoning. Information concerning this program can be obtained from the Federal Insurance Administration, Federal Buildillg, 1961 Stout St., Denver. Colorado 80202. Other federal Agencies The U.S. Army Corps of Engineers, the U.S. Soil Conservation Service, and the U.S. Geological Survey have specific authorities for the prep.>r..tion of detailed flood-plain reports. PURPOSE OF THIS MAP ". This map shows reaches of streams in Colorado for which de- tailed flood-plain information is available, and where studies and restudies are in progress. The inset map shows the status of flood- plain information in the Denver metropoll tan area. The accompanying table lists, by county, the streams that have been or are being studied, and Identifies the investigative agency. QWater Resource Engineer V, Colorado Water Conservation Board, Denver, Colorado. b Hydrologist, U.S. Geological Survey, Lakewood, Colorado. EXPLANATION COMPLETED STUDY STUDY IN PROGRESS _ _ RESTUDY IN PROGRESS ". ". R70W R68W R67W .,?'r ". , . R65W " '\ \ // ~. i, I,' I " , '" > -- , ",) \. nUll ~"' - T.4S T.5S \ I , I , .e,," (liCe" "'~ ./ -..................,................, .. - .V...- \ \ ,. ." \~('-~'~ f i\' ,\" '\ If . "- I ""our^,- !I $/Pe eltltr (lree" ~ \\ / r_6s ". - - ... B...f'.",U.h.o.g;uq...d FlotIdCOD,.0IOiU.iCI,1974 o I o 5 MILES I , , " , 'I 51('LOJlllETRES The Colorado Water Conservation Board maintains a library of the completed flood-plain information studies tabulated by counties. Study reports are published in limited quantities and distribution is limited. Persons needing access to or information on a given report should con- tact appropriate county or city officials. the agency that prepared the report. or the Colorado Water Conservation Board. Urban Drainage and Flood Control District 181 East 56th Avenue Denver. Colorado 80216 Chief. Flood Plain Management Sacramento District. Corps of Engineers 650 Capitol Mall Sacramento, California 95814 Chief, Flood Plain Management Omaha District. Corps of Engineers 215 North 17th Street Omaha. Nebraska 68102 ,. 0 ~ 2S L 50 75 100 KILOMETRES -------=-----=-:-..:--~ Coordinator, Flood Hazard Analysis U.S. Soil Conservation Service P.O. 80x 17107 Denver. Colorado 80217 INDEX MAP OF FLOOD PLAIN INFORMATION IN COLORADO, Colorado Water Conservation 80ard 102 Columbine Building 1845 Sherman Street Denver. Colorado 80203 Chief. Flood Plain Management Albuquerque District. Corps of Engineers P.O. Box 1580 Albuquerque. New Mexico B7103 JANUARY 1975 Chief. Flood Plain Management Kansas City District. Corps of Engineers 700 Federal Building Kansas City, Missouri 64106 t.....t, .,~ ,,- AUPAHOE alOT -.. Df..WEA ..,..., ,~, El PAS~ o;.o.AllUO JIHI.SOIt lA 'I.AT~ "."0 USANllU.S ,. 'll~l~ 'IIOWIllS P\l(ftlll QIOII.NltO 1I10GAANlll ~ Sll'tIITT "CO .~ OPEN-FILE REPORT Table 1.--FLOOD-PLAIN INFORMATION IN COLORADO St.......... ~"I..~ ..... 1\9 llt, (rH' Xl...'_, &..."9."'"l1C...... lIlt1. 0.-, 'reo, Soot",t.ntlll.... eln.c..... Sonde.... Toll Gltotr..' 'dgMo~e..tft ... Toll GouC..... tl'lefr,c.... GoldUlHhGulch 0..1'0'.-.01. LtUI. 0., C.... WlllowC.... .,...-Gi>I," .t;o.'e.... Be,,,t.ftk So.th,I,U..l..er ~......... Aj~r .nd tdl>olort". 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Clllo'....lde..11I69. 'f1ot.,loMI"IIIII011, ""....._"I....0..d..l..<9..1.....1.,. ""'th_ld...fIoJo.Ilr.I.._.,.I!oporI: tIt, 01 1001"". 1. U.S. A...yCO....f E"'11Me,.. 1~9. floo<1ohln Info_tlon.....ld..C..- .""SOUlh....l..... C........lI....I_...t...po'll1n'''''on. Colo.ado: U.S.A..,CO"'O'!"II....Qoo"', _..34...Uph..6f19" .. U.S. A.., Co,,. of l"'ll/IH". 1911. S1IK1.1 fl_IIa..'dln'o...tlon.lpO.t......ld.. c..... [It, o'".ldl.. CoI...Oo: U.S.A..,. "'.'.E.,....COOO..,........ S. \10"1>0.0..1..91'''' flOOd control Oht.ltt (R. W. ate. .""AUotlot"l.I91J. fIojOt"...lMq' phn.h'9. """'t~ .....lde' to-oo.. .. 1.2, o.n.e., Col... UrbonO'.I..q...... flood Cont...101U. 6. U.S.A..yCctrp'.'!"'lI......1969.Fl00d,1o'n lnf.....tlon,8Dul_t"""tJ...I' U.S. A.., tor" [.,.....co............. 1. U.S.A..,tO.,...["9".....,I!I12.'100d'1.1" Inf.....tlon.....l_eo..nly...III' U.S. A..ytorp.!tI<J....O"....N...'. 8. U.S. A.., eo.,. of ["'II...... 197t. n....pl.ln iM....tlon.8Dulo...eo..nty...l,: U.S. A""1 tor.. 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