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<br />SIMONS, LI & AsSOCIATES, INc.
<br />
<br />eXEcrJTIVESUMMJ\RY
<br />
<br />4105 EAST FLOAIDAAVENUE
<br />SUITE 300
<br />DENVEA. COLORADO 80222
<br />
<br />TElEPl-tONE (3031 592-0369
<br />
<br />OctoOO.1B,1<J82
<br />
<br />This report presents the reaults of the flood plain infQ~atlon. drainage
<br />plan, and street improvement plan for the ~~n of Milli~en, Colorado. The
<br />report ~~a prepared for the Town of ~llikon and the Colorado Water
<br />conservation Board to serve as a guide to street and drainage improvements and
<br />general development in Milliken. Included is the basic data used inhydrolo-
<br />gic, hydraulic, and economic analyses to ~fine the drainage situation as well
<br />as alternative solutions to the assocIated flooding problems in town.
<br />Analysis of the various alternatives produced a recommended drainage improve-
<br />ment plan including an Lmpl~mentation procedure. ~ preliminary ~treet impro_
<br />vement plan coordinated with the drainage improvement plan i5 also presented.
<br />The 'l'o"", of Milliken (270aores) ie located..t the rec"iving end of a7.'
<br />s~uar" mile agricultural drainage basin. Runoff from the basin passes through
<br />Milliken in three locations enroute to the Big and Little Thompson Rivers.
<br />Thesethr..elocationear<lthellesternPlo"l'athwhichatart"n"..rtheaouth_
<br />
<br />Ms. Nora Schiferl
<br />Milliken Town Cl..rk
<br />1'080><97
<br />Milliken, CO B054~
<br />
<br />Re,
<br />
<br />"Plood Plain Information, Drainage Plan and Str....t Improvement
<br />I'lan at Milliken, Colorado"
<br />
<br />Dear Ms. Bchiferl:
<br />
<br />In compliance with the contract of February 10, 19S2 between the 'l'own
<br />of Milliken and Simone, Li & AsSOCiate", Inc. (SLI'l) ,.., ha"e <."Ompleted
<br />a detailed drainage atudy of Milli~~n, Colorado and the asaoe-iated
<br />drainage basin. Tr..namitted herewith are fifty (50) copies of the
<br />final.report "Flood Plain Information, Drainage Plan and Street
<br />Improvement Plan at Milliken, Colorado" which presents our analysis
<br />and recommendations for drainage and etreet improvements in Milliken.
<br />Detailed data and methods of an..lysis ..re contained in the ~chnic..l
<br />Addendum ..hich along with "Drainage and Street Oeaign Manu..l for the
<br />Town of Milliken, Color~do" wiil be ehipped ~der separate cover.
<br />
<br />~e8t city limit and rune to..ard the elementary school, the Lola Park Tributary
<br />begins just south of Lola Park and rune north between Ir..ne and Joaephi ne
<br />Avenues to the Little Thompson Rive,.., and the Ea"t~rn Flow Path follO'n's County
<br />Road 2~ to the Thompson and Platte Ditch. Natural drainage through town h
<br />hindered by roads, railroads, Irrigation ditches, ~nd buildings. Of these,
<br />tn~ C~lorado St..te ~ighway ~O, Great Western ~ilroad, and Onion Pacifio
<br />
<br />We ..ieh to acknOwledge with thanks the input and cooperation of the
<br />Techniealeomroltt....whiehincludedO. flandolphSe"hol"'ilndLarryl".
<br />L..ng of the Colorado Water Conaervation Board and Charlee Martin, Jim
<br />Gramling, Leroy Martine~ and Jim Adkisson representinQ the Town of
<br />Milliken; Mervin Martin, Milliken'a Mayor, Gayle l'ack..rd-Seeburgar,
<br />Town Manager, the remaining_1'Ibe.rs of the to"",council and the people
<br />of Milliken, We enjoy..d working ..ith yOu on this moet challenging
<br />"tudyand look forw"rdto the opportunity to work with you again.
<br />
<br />Railroad ~nkments are the greatest obstructions.
<br />
<br />Intenss thunderstorms
<br />
<br />Sincerely yours,
<br />
<br />over the b....in producing heavy runoff have resulted in severe flooding in
<br />Milliken in the past, particularly in the SUmmer of 1~8' "nd '982.
<br />~ydrologie analysis wae performed to determine peak flow rates and flood
<br />volumes at various points in town for selected storm frequenci..s. The Storm
<br />lIater Management Model (SWMMl Wll" used to mo<\"l 2-, 5-, 10~. 25-, 50-, '00,
<br />
<br />~::-t.fL7
<br />Vice President
<br />
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<br />and S~O~~'c~r !,-c't"-e,,e:.. ctor"'~ o..'er ::''1.e l:).1,~t;\ for .udaLi"." a,w ye"r ~OOO i>o.~i"
<br />
<br />conditions.
<br />
<br />OM/de
<br />D-8!R:20).1
<br />
<br />~he results of hydrolo1ic analysis wore used in hydraullc ..nalyei" as
<br />lnp\lt to the U,S. Army Corps of Engineers' ~C-2 ",...ter surhce profil" eo",-
<br />put..r ",",wL This provtd",\ "st1..ate. of the w..t,,~ ..urtao~ elevations fo"
<br />floods of the "ariou~ !r0qucnciee in Millikon. Th@ .....te~ ~urfac@ profiles fQr
<br />th.,. ol.r..inage"...y" ",are tunsferred to.. topoq-,-aphie map ('''_200',t .."-foot
<br />
<br />~c: 0, R...ndolph BeQholm
<br />;:"closur'e
<br />
<br />fORT COL1.INI HU.DQUARTERI: POST D~~ICE BOX 'a16, mRT COlL'NS, COLORADO 110622 ,303) 223-'100
<br />TUCION OffiCE, ':/0 W BROAOWAY SUIT!' 2M P.O !lOX 27'~ TUCSO". "R'ZO"" a\102 i6M'~M."';"<
<br />CHEYENNE OffiCE; \780 W~STLANO ROAD, CHn~"I'I~, WYOM'NG82001 !301) i\,14.N7~
<br />"ITIS5URQ~ Of'ICE, '2' f'ELO CLL!B ROAO. ~tTTS!l'JFlGH, "'~NNSYLVANIA 15233(~'2)96J'0711
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