OMB No. 1024-ml8 (Frcv.I 0d) UnttedStates Department of the Inlerlor NationalPark Service

NationalRegister of HistoricPlaces Lt,;t, LD \11=o1tS RegistrationForm

Thlr torm f! tor uEoIn nomlnallngor roqueltlngdetormlnatlon! of cllglbllltylor Indlvldullpropo.tlo! or dlsirlcl!. Soe In.trucllon.ln Ouldellnsglo. Completl,E NadonalRoglsler Fotms (Nailonal R€glrteJBulletin 16). Complslo€ach ltom by marklng L ln lhe appropdate box or by .nlerlng ihc roquostedInformallon. lf an hemdoer not applyio the propcrtybolng documor od, ontor'lvrf tot'not rppllcablo.'For funcllonr,dylo!, malerial!, and rrea! of rbnmcanco,onler only lho caisgorlo!and lubcategorlo.li6t9d In lho indruc'tion!,For rddillonallpaca usc conllnultlon!hso!! (Form l0-900a).Typo all onlrior. 1. Name of Property hlstorlcname PlattsmouthBridge other name/sltenumber NEHBSNumber CC00-215 2. Locatlon street& number U.S. Highway 34 over the Missouri River N.r not for pubflcation city, lown east edge of Plattsmouth N/A vlclnity state NE; tA countyCass, NE; Mills, IA code 025 zip code 68048 3. Glasslflcatlon Ownershipof Property PlattsmouthBridge Company Numberof Resourceswithln Property Categoryof Property stmcture Contributing Noncontrlbuting o 0 ouitoings 0 0 shes I 0 structuree 0 0 objecrs 1 0 totat Numberof contribrningrosouroes prwlously llstedIn the NationalReglster: 0 Nameor relatedmultlple property listing: Highway Bridges in Nebraska l87A-19/+2 4. State/FederalAgency Certlflcatlon

As the deslgnaledadhor[y undsrtho NatlonalHlslorlc Proso.vdlon Ad ct 1966,as am€nded,I herebycertfy thd thF fX- nomlnatlon _ roquedto. dstermlnallonot ellglbllltymesls the docrrnsntaon stsndardstor roglstsrlngp|opertl€s In thg Natlonal Registerof i lisloric and meetsthe proceduraland professlonalrequlrements set forth In 36 CFR Part 60. In nry opinion,the ) \./ does qpt msel the Ndional ReglslerGrllerla Slgnature H* tu State or Federal agoncy and bureau

In my oplnlon,the property does not mestlhs NationalRegisler Criteria

Slgnature of commenting or other otticial Date

State or Federal agency and burcau 5. NatfonalPark ServlceCertlflcatlon l, hereby,certify that this pi,rpertyis. enteredin the NationalRegister see contlnuationsheet determineclellgible for the National Register sse contlnudlonsheet determlnednot eligiblefor the NationalRegister removedfrom the NatlonalRegister other (explaln:)

Signature of the Koeper Dato of Action 6. Functlonor Use HistoricFunction (enter categories from instructions) CunentFunction (enter categories from instructions) TRANSP O RTATIO N/road-related TRANSP ORTATION,/road-related

7. Descrlptlon ArchitecturalClassification (enter categories from instructions) Materials(enter cdegories from instructions) OTHER/ng1d-corurected cantilevered through brrss foundation N/A walls N/A roof N/A other N/A Describepr€s€nt and historic physlcal appsaranc€.

Located on the east edge of Plattsmouth, the Platsmouth Bridge spans the Missouri River on the Nebraska - Iowa state line. Other than maintenance-related ref'airs, Oe bridge remains essentially unaltered as it continues to carry vehicular trafEc. The Plansmouih Bridge todai retains a high degrei: of integrity of loca{on, design, ietting, materials, workmanship, feeling ;nd ass5ciation. e dEscrip-tion of the structure follows: spannumbsr: 2 constructiondate:L929 spanlength: 400.0' constructioncost: $639,361.00 totall€ngth: 1820.0' currentcondition: excellent roadwaywdt.: 2O.O' alterations: none sup€rstructuro:steel, rigid-connected cantilevered through trrss substruclure:concrete abutments and piers with architecnrral detailing tloor/decking:concFete over steel stringl"Js oth6rfeatures: uppgr chord: 2 channels with cover plate and lacing; lower chord: 2 channels with lacing; venical: 2 channels with lacins. 4 aneleswith continuous olate: diaeonal: 2 channels with lacing; lateral !"fqltg; a angl-eswiitr tacing; strut: 4 angtes-witlitacing, braced; floor beam: I-beanL field-bolted to vertical; guardrail steel screen mesh

See continuationsheet 8. Statement of Slgnlflcance Certifyingofficial has consideredthe significanceof this propertyin relationto otherproperties: statewide ApplicableNational Register Criteria C CriteriaConsiderations (Exceptions) N/A Areasof Significance Engineering Periodof Significance L929 (The period of significanceis derived from the original constmc- tion date.) SignificafiDates L929 CulturalAffiliation N/A SignificafiPsrson N/A ArchitecuBuirder Omaha Stmctural Steel Works, Omaha NE Omaha Surrctural Steel Works, Omaha NE idilrf,3n Omaha Surrctural Steel Works, Omaha NE Statesignificanco d property, and iuslity crit€ria, critsria considorations andareas of significance noted abov€.

The Plattsmouth Bridge carries U.S. Highway 34 over the Missouri River between CassCounty, ttebSqska,and Mills C6unty,-structure Iowa. LocatEd inimediately downriver from GeorgeMorisonls fSSOrail- road bridge, the immense consistsof seven-spans:a 402-foot can[levered through mrss over the rive/s navisable channel.anchored bv flankins-20L-foot throueh soans.with two 203-foot and two 104-foot deik trusseson-the eastemilood ptain. The bridse #as c'onstiuctedin 1929 as a toll structure for the PlattsmouthBridge Company, a- privately held dorporation. (Tolls are collected on the bridge presently by the compairy.) rire frfiage was f,esigned,fabricated and erectedby the OmahaSbrrctural Steel Works, for a reportedtotal cost of $639,361.00. With its sharp angularity and somewhatgraceless profile, thl PlattsniouthBridge resembles some of the l.9th centuif, pii-connected trussesover the Missouri River. But its riveted connectionsand modestlv Modeme channel oiers indicatethe relatively late constructiondate. The bridge's2o-foot roadwayividth placesit amon! the narrowestof the extant vehicular tnrssesover the Missouri River. Sinceits completion in December 1929, the PlattsmouthBridge has ca:ried relatively heavytrafEc on this strategicallyimportant inter- state route.

The Plattsmouth Bridse is distinzuishedas one of the oldest extant Missouri River bridqes-ana into Nebraska,e:rceeded ii age by oily the Abraham Lincoln Bridge in Washington County, Oe lvleridianBridge in CedarCounty. It is technologicallysignificarr-t as a notewoithy exampleof canti- leveredtruss constmction:one of three suchtrusses over the Missouriinto the state (the others: the SouthOmaha Bridge (NEHBSNo. DO09:97-1) in DouglasCounty, and the Brownville Bridge (NEHBS No. NH00-85)in NemahaCounty). For further conte.xtualinformation regardingbridge building in Nebraska,registration requirements, and property q/pes,see related multiple properrylisting'Higlway Bridgesin Nebrask4 t87O - 7942."

_See continuationshed 9. MaforBlbllographlcal References

NebraskaDepannrent of Roads,Structure l.Itventory and Appraisal: Smrcftre Number 5034 38208; Harold Levinger,"Omaha Steel," NebraskaBhre Print, October 1949; H.G. Schlin, 'Missouri River Bridges Progress Report," tlpewrinen report dated 20 September 1945, located at Nebraska DePartmentof Roads,Lincoln, Nebraska; field inspectionby Clayton B. Fraser and Sheila Bricher- Wade,15 November1989.

_See continuationsheet

Previousdocumentation on file (NPS): Primarybcaion of additionaldata: preliminarydetermination of individuallisting x state historicpreservation office (36 CFR 67) has been requested OtherState agency previouslylisted in the NationalRegister Federalagency previouslydertermined eligible by the NationalRegisler Local government designaeda NationalHistoric Landmark university recordedby HistoricAmerican Buildings Survey # Other(specity rspository:) recordedby HistoricAmerican Engineering Record #

10. GeogrqphlcalData Acreageof Property less than one acre GadastralReference s20, TLzN, R14E USGSQuadrangle Pacific Junction lowa - Nebr. (7.5 Minute Series,1956; photorevised1984) UTM References zone L5 easting258940 northing4542560 _See continuationsheet VerbalBoundary Doscdptlon The nominatedproperty is a narrow, rectangularshaped parcel measuring 1.820 feet by 22 feet, which is centeredon the UTM point listed above. lncludedwithin this rectangularparcel are the bridge's superstructure,substructure, floor systenqand approachspans.

_Seecontinudion sheet BoundaryJustification The nominatedstrucntre indudes the bridses suDerctructure.substructure. floor svstern anv aooroach spansand the property on which they restl rhesi boundariei encompass,irut do iot exieed, al'of the property that has been historically associatedwith this bridge.

_Seecontinudion shest 11. FormPrepared By namenitle Clayton B. Fraser, Principal organization Fras€rdgsignand Hess, Roise and Company date 30 June L991 street& number 1269 Cleveland Avenue tebphone 303-669-7969 city or town Loveland state Colorado zipcode 80537 View: Looking northeast Photo by Clayton Fraser, 1989. Original negative located at NeSHPO.