us 181 harbor bridge project -...

US 181 Harbor Bridge Project

ATTACHMENT 15-1 Aesthetic Guidelines Addendum 4


US 181 Harbor Bridge Project i

Table of Contents

Chapters

Project Overview ii1.0 US 181 Harbor Bridge 11.1 Overview 11.2 TowersandCableConfiguration 11.3 DeckandSuperstructure 11.4 Anchor Piers and Deck Transitions 11.5 Mid-SpanBelvedere 11.6 ConcreteTrafficBarrier 21.7 UtilityandMaintenanceStructures 2

2.0 Approach Bridges and Corridor 32.1 Overview 3

3.0 Superstructure 53.1 Rail 53.2 BeamsandGirders 5

4.0 Bents 64.1 Bents 6

5.0 Retaining Walls, Abutments and Riprap 75.1 RetainingWalls 75.2 Abutments 85.3 Riprap 9

6.0 Pedestrian Fencing 106.1 Overview 106.2 PedestrianFencingattheHarbor BridgeandApproachBridges 106.3 PedestrianFencingintheCorridor 116.4 StaplesBridgePedestrianCrossing 11

7.0 Signage 127.1 OverheadRoadwaySignage 127.2 SharedUsePathSignage 12

8.0 Lighting 138.1 ArchitecturalLighting 138.2 RoadwayLighting 13 8.2.1US181HarborBridge 13 8.2.2ApproachBridgesandCorridor138.3 SharedUsePathLighting 13

9.0 Hardscape 149.1 NoiseWalls 149.2 Paving 149.3 SharedUsePath 14

10.0 Landscape 1610.1 Overview 1610.2 ApproachBridges 1610.3 Corridor 1610.4 Shared Use Path 1710.5 PlantListandDetails 1710.6 Irrigation 18

11.0 Finish Schedule 1911.1 ColorPalette 1911.2 Textures 1911.3 OpaqueSealer 19

Figures

Figure i Project Limits map iiFigure 1.1 US 181 Harbor Bridge location 1Figure 1.2 Required aesthetic surface treatments on T80HT rails 2Figure 2.1 Approach Bridge limits 3Figure 2.2 Corridor connections limits 4Figure 3.1 Required aesthetic surface treatments on T80HT rails 5Figure 3.2 Required aesthetic surface treatments on rails 5Figure 3.3 Required surfaces for aesthetic

treatment on concrete beams 5Figure 3.4 Required surfaces for aesthetic

treatment on steel girders 5Figure 4.1 Limits of rounded corners on square

columns 6Figure 4.2 Required aesthetic surface treatments on bents 6Figure 4.3 Aesthetic treatment of bents in a sloping condition 6Figure 4.4 Bents in a sloping condition with

aesthetic treatment justified at the top 6Figure 4.5 Bents in a sloping condition with

aesthetic treatment justified at the bottom 6

Figure 5.1 Fractured fin texture on retaining walls shall not be accepted 7Figure 5.2 Retaining wall envelope of higher detail 7Figure 5.3 Conceptual retaining wall aesthetics —

sample accent graphic 7Figure 5.4 Conceptual retaining wall aesthetics — sample accent graphic with texture background 7Figure 5.5 Abutment wall and slope treatment

areas 8

Figure 5.6 Example delineating where enhanced riprap is not required 9Figure 5.7 Example delineating where enhanced riprap is not required 9Figure 6.1 54” pedestrian fence 10Figure 6.2 US 181 Harbor Bridge pedestrian fence 10Figure 6.3 Railroad and port crossing locations 10Figure 6.4 Examples of acceptable fence fabric 17Figure 6.5 Existing North Alameda Street bridge with steel pedestrian arch 11Figure 6.6 North Staples Street bridge pedestrian crossing with steel

pedestrian arch 11Figure 7.1 Overhead roadway signage, visibility of open vertical trusses shall not be accepted 12Figure 7.2 Example of concrete sign columns

supporting horizontal trusses 12Figure 8.1 Existing Harbor Bridge multi-color

display 13Figure 9.1 Northern shared use path connection context 15Figure 9.2 Southern shared use path connection context 15Figure 10.1 Curved mow curbs preferred 16Figure 10.2 Plant bed preparation and spacing 17Figure 10.3 Tree planting detail 17Figure 10.4 Irrigation control boxes on footing 18Figure 10.5 Typical irrigation PVC/header

connection 18Figure 10.6 Typical valve assembly for drip irrigation 18Figure 10.7 Typical installation of drip irrigation at trees, section and plan view 18Figure 11.1 Example of cool color palettes 19Figure 11.2 Thematic textures 19


US 181 Harbor Bridge Project ii

Project Overview

The US 181 Harbor Bridge Project includes thedesign,constructionandmaintenanceoftheUS181HarborBridge,andportionsofUS181,I37andSH286inCorpusChristi,Texas.TheProjectlimitsextendbothnorthandsouthalongUS181andSH286andeast and west along I 37 and includes: US 181 toBeachAvenueonthenorth;CrosstownExpresswaytoMorganAvenueonthesouth;I37toUpRiverRoadon thewest; and I 37 toCarancahuaStreet on theeast.

ThirdpartyrelationshipstonotearethePortofCorpusChristiAuthority (PCCA), theUnionPacificRailroad(UPRR),theUnitedStatesCoastGuard(USCG),theFederal Aviation Administration (FAA), and the USArmyCorpsofEngineers(USACE).

Thisdocumentdelineates the treatmentcriteria thatserve as the preliminary aesthetic design of thecorridor. It establishes the standards necessary to producetheintendedform,functionandappearanceofeachbridgeandhighwayfeatureandcomponent.Thisdocumentisnotintendedtodefinethedesignoftheproject,but ratherserveasasetofparametersthat will be incorporated into final engineeringdesign.Certainelementsmaybe subject toDesignException requests, but only by approval fromTxDOT.Allaestheticand landscapedesignshallbein conformance with the pertinent sections of theProject’s Techical Provisions (TP). Where conflictsexistbetweenthisdocumentandtheTP,theTPshallgovern.

The Project shall incorporate aesthetics that reflectof theCorpusChristi communityand localheritage.TheUS181HarborBridgewillbecomea treasured

landmarkandserveasajewelofthecommunity.Thecharacterof theProjectwillbeuniqueandhaveanelegantandsleekappearance.

Thearchitecturalandlandscapeaestheticguidelinesfound in this document are based upon communitystakeholders’ input and visual preferences. Insummary, the Project shall receive one, continuousaesthetic theme to be reflected in the corridor.Thetheme should summon the sense of community ofCorpusChristiandcomplementthehistoric,industrialand unique areas in the corridor such as NorthBeach,downtown, themarineport,and theocean’ssignificancetoCorpusChristi.

Examples of such significant components couldincludeoceanwaves,ecologyoftheseaorwetlands,nautical history of the region, industry (shipping/fishing),andrecreationandtourismastheyrelatetotheGulfofMexico.Graphicexamplesof the themeseenthroughoutthisdocumentareguidancefortheDeveloper’s Final Design. The Developer’s team isexpected to create its own thematic design for theProject.

Corrosivesaltair,windandrainshallbeconsideredwhen selecting materials and types of aestheticapplications. The Developer shall make efforts tominimize the appearance of these environmentaleffects on the facility to the extent reasonable and practical.

TheDevelopershallincluderoostingbirdpreventionmeasureswhererequiredperTP Section 13.2.1.19, Maintenance and Inspection,howevertheyshallnotdetractfromaesthetictreatments.

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Figure i – Project Limits Map


US 181 Harbor Bridge Project 1

1.0US181HarborBridge

1.1 OverviewTheUS181HarborBridgedesignmust realize thevisionofTxDOTandthelocalcommunitytocreateasafeandfunctionalnewharborcrossing.Thishighlyvisible city landmark is intended to be an elegant,unique,andmemorablestructure.

Designandconstructionobjectives:

• To combine functional requirements andaestheticobjectivesinonestructuraldesign.

• To recognize the technical aspects of thestructureasdesignfeatures.

• Toprovideadesignforconcretecomponentsthat allows consistent, smooth surface finishconcreteform-work.Texturedform-workshallbe of consistent high quality. The pattern ofform-workwillbeanimportantdesignelement.

• To integrate best practices in transportationsustainabilitybyemployinga“triplebottomline”(social,environmental,economic)approachtodesign,asdescribedbytheFHWA’sINVESTinitiative.

1.2 Tower and Cable ConfigurationThe towers are a significant visible feature of thebridge, designed for both structural capacity andaestheticintegrity.TheDevelopershallconsiderspacerequirements for the towers’ component parts: staycableanchorages;diaphragms;andtensionties.Alsotobeconsideredareinspectionactivities;maintenancefacilities;lightingforshipchannelnavigation;aviationandportrequirements;androadwayandarchitectural

lighting.Thetowersshallbeadominantfeatureofthebridgethatdefinetheviewer’sperceptionoftheentirecrossing. When illuminated at night, they shall befurther enhanced (see subchapter 8.1 ArchitecturalLighting).

All tower configurations, with the exception ofH-shaped towerswithahorizontalstrutabovedecklevel, are be permitted. An H-shaped tower with ahorizontal strut under the deck is permitted. A fanarrangementofcablesisrequired.

1.3 Deck and SuperstructureThe deck and superstructure aesthetics shallbe governed by constructibility and life-cycleserviceability. Their appearance shall be consistentwiththetechnicalandaestheticaspectsofthetowers.Thedeckandsuperstructuretransitionsbetweentheapproach bridges and the US 181 Harbor Bridgeshall be seamless, elegant and well-resolved. Thedecklayoutshallatalltimesensuretrafficflowwhilefulfillingsafetyandmaintenancerequirements.

1.4 Anchor Piers and Deck TransitionsPiersshallbeelegantandsleek.

1.5 Mid-Span BelvedereA cantilevered belvedere shall be provided at mid-span of the Harbor Bridge over the Corpus ChristiShip Channel, gulf side. It shall serve as a scenicoverlook for pedestrians and bicycle riders on theshared use path. The belvedere shape and layoutshallbedesignedtoprovidesafeandeasyaccessforpathusers.

A pedestrian fence shall run continuously from theshared use path and along the outer edge of thebelvedere.RefertoChapter6.0,PedestrianFencing.

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US 181 Harbor Bridge

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Figure 1.1 – US 181 Harbor Bridge location



1.0US181HarborBridge

1.6 Concrete Traffic BarrierTxDOT Concrete Traffic Barrier (CTB) railing typeT80HTshallbeused for theUS181HarborBridgeper TP Section 15.3.6, Traffic Railings. This railingwill allowmotorist views off the bridge.Maintainingvisibilityfromthebridgetothevistasbelowisahighpriority.SeeFigure 1.2forrequiredaestheticsurfacetreatments. Paint on concrete shallmeet all criteriain the TxDOT Departmental Material Specifications (DMS), Section DMS-8110, Coatings for Concrete.Metalcomponentsshallonlyreceivefinishtreatment(galvanization,opaquesealer,stainlesssteel).Opaquesealeronmetalcomponentsshallmeetallcriteriainthe TxDOT DMS, SectionDMS-8100StructuralSteelPaints - Formula and Section DMS-8101 StructuralSteelPaints-Performance.Nophysicalmodificationsto rail components that change their structuralintegrity or tested abilities are permitted. Life-cyclemaintenanceandcleaningshall beaprimary factorwhen selecting aesthetic applications to theT80HTrailsurface.

1.7 Utility and Maintenance StructuresUtility components shall be designed and locatedto have minimal adverse visual impacts on majorbridge components. Consolidateminor componentsand integrate them into the overall architecturalcomposition.

All utilities thatareexposedon thebridgestructureshallbepaintedtomatchthestructure.

Figure 1.2 – Required aesthetic surface treatments on T80HT rails



2.0ApproachBridgesandCorridor

2.1 OverviewThe transition from the US 181 Harbor Bridge tothe approach bridges shall be seamless. Aesthetictreatmentsandformsofthebridgeelementsdiscussedin the subsequent chapters shall not differ betweenthe bridge segments, unless otherwise noted. Thelocation of approach bridges in the Project corridorareillustratedinFigure2.1.

TheDevelopershallminimizethenumberofapproachbridgebents to theextent reasonableandpractical.Theintentoffewerbentsistopreventtheappearanceofa“forestofcolumns”asobservedfrombelowthebridges.

TxDOT will initiate public involvement activities tohelp define the uses and aesthetics beneath theApproach Bridge where the right-of-way intersectsthe Northside Neighborhood. The general locationof the neighborhood/Approach Bridge intersectionis illustrated in Figure 2.1. The Developer shallcoordinatewithTxDOTtoensurethatdevelopmentinthisareaisconsistentwiththeoutcomeofthepublicinvolvement activities. Refer to TP Section 3.2.5, Customer Groups.


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Figure 2.1 – Approach bridge limits



2.0ApproachBridgesandCorridor

2.1 Overview (continued)The transition from the approach bridges to theremainderofthecorridorfacilitiesshallbeseamless.Aesthetic treatments and architectural forms andshapesofthefacilityelementsshallnotdifferbetweenthe approach bridges and corridor facilities. Thelocation of corridor connections in the Project corridor areillustratedinFigure 2.2.

At corridor termini, the aesthetics shall blend intothe existing roadway facilities.Methods of blendingaesthetics include the continuation of aesthetictreatmentsonCTBrailsbeyond theproject limits.AlogicalstoppingpointwouldbewhereaCTBterminatesataramp,endsatabridgerail,ortherailtransitionstoametalbeamguardfence.Thisapproachshallbedeveloped in concept and presented to TxDOT forapprovalpriortotheformalDesignSubmittal.


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Figure 2.2 – Corridor connections limits



3.0Superstructure

3.1 RailThe applied aesthetics of the rails at the approachbridgesshallbethesameorcomplementary to thatoftheUS181HarborBridgerail.RequiredaestheticsurfacetreatmentsareillustratedinFigure 3.1.

CTBrail typesusedintheremainderof thecorridorshallbeperTP Section 13.2.1.12.AppliedaestheticsshallbecomplementarytothatoftheUS181HarborBridgeandapproachbridgerails.RequiredaestheticsurfacetreatmentsareillustratedinFigure 3.2.

3.2 Beams and GirdersAesthetic treatment on concrete beamsandgirdersislimitedtoopaquesealer,whichshallbeappliedtothe underside of each beam and outer surfaces oftheoutsidebeamsas illustrated inFigure 3.3. Steel girdersshallreceiveopaquesealerapplicationsonallsurfacesasillustratedinFigure 3.4.

Opaque sealer on concrete beams shall meet allcriteria in the TxDOT DMS, Section DMS-8110,CoatingsforConcrete.

Opaque sealer on steel girders shall meet all thecriteria in the TxDOT DMS, Section DMS-8100StructuralSteelPaints-FormulaandSection DMS-8101StructuralSteelPaints-Performance.

Textureapplicationsorotheraestheticsmodificationsshallnotdiminishthestructuralintegrityofbeam.

Opaquesealeronconcreteshallmeetall criteria inthe TxDOT DMS, Section DMS-8110, Coatings forConcrete. Metal rails and other metal componentsshall only receive finish treatment (galvanization,opaque sealer, stainless steel). Metal componentsshall only receive finish treatment (galvanization,opaque sealer, stainless steel). Opaque sealer onmetalcomponentsshallmeetallcriteriaintheTxDOT DMS, Section DMS-8100 Structural Steel Paints -Formula and Section DMS-8101 Structural SteelPaints - Performance. No physical modifications torailcomponentsthatdiminishtheirstructuralintegrityor crash tested abilities will be accepted.Aesthetic applications to the selected rail(s) shall meet allTxDOT standards.

Figure 3.2 – Required aesthetic surface treatments on rails

Figure 3.1 – Required aesthetic sur-face treatments on T80HT rails

Figure 3.3 – Required surfaces for aesthetic treatment on concrete beams

Figure 3.4 – Required surfaces for aesthetic treatment on steel girders



4.0Bents

4.1 BentsBent aesthetics shall complement and support theProject’s aesthetic theme. The scale and level ofdetailofappliedaestheticsshallbeappropriateforthestructure’ssizeandlocationaswellasforanobservertravelingatthedesignatedspeedlimitand/orstoppedatatrafficsignal.

Surfaces that shall receive aesthetic treatment are,butarenot limitedto,thoseillustratedinFigure 4.2. Acceptableaesthetictreatmentsareopaquesealers,texture,and/ormounted,cast-in-placeforms.

Opaquesealeronconcreteshallmeetall criteria inthe TxDOT DMS, Section DMS-8110, Coatings forConcrete.

Single column bents may show a clear distinctionin width between a bent cap and the column, ortheycanbeconstructedasaunit that transitions inwidth (flared column). Bents shall be proportionedsothathorizontal linesof thesuperstructurearenotinterrupted.Bentcolumnsshallnotbetooslendernorcapstootallsoastheyconveyafeelingofinstability.

The column shape shall be rectangular or square.Circular columns are prohibited per theTP Section 15.3.2, Bridges.Chamferedandroundedcornersareallowable.Roundedcornersshallnotexceed1/4thelengthofeachface;seeFigure 4.1.

Tapered columns or those with wider bases areallowable.Iftaperedcolumnsaredesigned,thebaseofthecolumnshallnotexceed150%ofthewidthatthe top. Ifcolumnswithawiderbasearedesigned,thewiderbaseshallnotoffsetfromthemaincolumn

widthbymorethan150%ofthecolumn’swidth,andtheheightshallnotexceedone-thirdoftheheightoftheshortestcolumninabridgespan.

Although a variety of shapes and sizes arepermissible,theDevelopershoulduserestraintwhencombining/selectingaestheticpreferences.Toomuchornamentation or variety is not in keeping with thesleek,elegantvisionforthebridge.

Aestheticapplicationsshallnotdiminishthestructuralintegrityofthebent.

Itisallowablefortheappliedaesthetictobefocusedatthetoporbottomportionsofthebent.Wheretheheightofadjacentbentsvaryduetoslopingroadwayand superstructure and/or finished grade changes,the applied aesthetics shall remain consistent andjustifiedtowardthechosentoporbottomofthebent;see Figures 4.3, 4.4 and 4.5.

Figure 4.2 – Required aesthetic surface treatments on bents

Figure 4.3 – Aesthetic treatment of bents in a sloping condition

Figure 4.5 – Bents in a sloping condition with aesthetic treatment justified at the bottom.

Figure 4.4 – Bents in a sloping condition with aesthetic treatment justified at the top.

Figure 4.1 – Limits of rounded corners on square columns.



5.0RetainingWalls,AbutmentsandRiprap

5.1 Retaining WallsAestheticapplicationsonretainingwallsshallrelyonopaquesealers, form linersand/orapplied textures.Retaining walls shall meet all criteria of Item 423of Attachment 13-1, Structure Provisions. OpaquesealeronconcreteshallmeetallcriteriaintheTxDOT DMS,SectionDMS-8110,CoatingsforConcrete.

Appliedaestheticsnotpermitted:

• Retainingwalltexturetype“fracturedfin”;referto Figure 5.1foranexample.

• Paintedmurals,largeandsmall

Continuously running horizontal lines, texture,pattern or design alignment are not permitted.Anysettlingandresultingrotationovertimewillbemorenoticeableinahighlylinearapplication.Offsettingandbreakinguphorizontal lineswill draw theeyeawayfromanyshiftingofretainingwallpanelsthatoccurs.

The retaining wall aesthetics shall be developed inaway that supportsandcomplements theProject’s

aesthetic theme.This is also defined inTP Section 15.3.4, Retaining Walls.

Aesthetics on walls will be seen from a variety ofvehicular speeds, elevations and directions. Theaesthetics shall employ scale, level of detail, depthof reveal/reliefandcolor tobefit thoseconditions inwhichthemotorist/pedestrian/bicyclistwillbeviewingthem.

Retaining walls shall carry the higher-detailedaestheticapplicationwithinthebottom10feetofthewall(measuredfromfinishedgrade).SeeFigure 5.2

for the envelope of higher detail andFigure 5.3 for anapplieddesignexample.Surfaceareaoutsideoftheenvelopeshallhaveasimpler,repetitiveaestheticapplicationasillustratedinFigure 5.4.

The Developer shall identify and account for theslopingconditionsofthesuperstructureandfinished

gradeasitrelatestothelayoutoftheappliedaestheticandtheenvelopeofhigherdetail.

TxDOTreservestherighttorequirewallconstructionwhereexistinglandfeaturesshallbepreserved.

Foradditionaltexturesamples,refertoChapter11.0,FinishSchedule.

Figure 5.3 – Conceptual retaining wall aesthetics - sample accent graphic

Figure 5.4 – Conceptual retaining wall aesthetics - sample accent graphic with texture background

Figure 5.1 – Fractured fin texture on retaining walls shall not be accepted

Figure 5.2 – Retaining wall envelope of higher detail




5.2 AbutmentsAllproposedabutmentwallsshallbeconsistentwithorcomplementtheaestheticsoftheadjacentretainingwalls.

Figure 5.5 demonstrates two abutment walls andthe components to which these guidelines apply.Whereaverticalendwallisused,thewallshallcarrythehigher-detailed,dominatingaestheticapplicationwithinthebottom10feetofthewall(measuredfromfinishedgrade).Surfaceareaoutsideoftheenvelopeshall exhibit a simpler aesthetic pattern.Acceptableandunacceptableappliedaestheticsarethesameasthoselistedinsubchapter5.1,RetainingWalls.

AbutmentsshallsatisfytherequirementsofItem420in Attachment 13-1, Structure Provisions.

Figure 5.5 – Abutment wall and slope treatment areas




5.3 RiprapRiprap shallmeet all criteria inTP Section 15.3.14. Enhanced riprap shall incorporate the Project’saestheticthemeonlyathighlyvisibleareas,includingUS 181/SH 286 and I 37 interchange, North PortAvenue, Brownfield Boulevard, Leopard Street,BroadwayStreet,BroadwayBoulevard,andBurlesonStreet.Thistreatmentincludesareasbetweenroadwayandstructureswithadistanceorwidthgreater thantenfeetorwhererampstransitionbetweenmainlanesandfrontageroadsatwidthsgreaterthantenfeet.

EaseofmaintenanceshallbetheDeveloper’sprioritywhen selecting aesthetically enhanced non-grassriprapmaterials.Riprap shall, atminimum,meet allcriteria in Item 432 of Attachment 13-1, Structure Provisions, however use of loose aggregate andpaversisnotpermitted.Enhancedaestheticsincludebutarenotlimitedto:

• Colored-integralcolor,stainedoracid-etched(all surfaces shall be non-slip in pavementapplications)

• Exposed aggregate - seeded, colored, orhand-cast

• Othertexturalfinishes-stamped,scored,salt,tined/grooved, stippled, stenciled, sponged,groutedcast-in-placeformsorformliners

Non-enhanced, non-grass riprap includes concretewith a broom (coarse to fine), smooth troweled, orfloatedfinish.

Instances where riprap doesn’t require enhancedaestheticapplicationinclude:

• Areas between roadway and structures witha distance orwidth of less than ten feet, asillustratedinFigure 5.6

• Where ramps transition between mainlanesandfrontageroad(freewaygores)atwidthsoflessthantenfeet,asshowninFigure 5.7

• Areas between or adjacent to guard fenceposts, sign posts, bent columns, retainingwalls,pavedditches,flumes,andditchinlets

Figure 5.7 – Example delineating where enhanced riprap is not requiredFigure 5.6 – Example delineating where enhanced riprap is not required

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6.0PedestrianFencing

6.1 OverviewPedestrian fence on the Project shall, meet allrequirementsfoundinTP Sections 15.3.11, Fencing; 15.3.12 Color and Surface Palette; 13.2.1 Bridge; TxDOT DMS, Section DMS-8100 Structural SteelPaints - Formula and Section DMS-8101 StructuralSteelPaints-Performance.

6.2 Pedestrian Fencing at the Harbor Bridge and Approach BridgesFencedesignshallbedevelopedinrelationtootherUS 181 Harbor Bridge components and reflect thetechnical and aesthetic elegance of the towers,cables,andsuperstructure.Fencepanelsshallhavean open design so as to minimally obstruct views.Heightofpedestrianfencingshallbe54inches;referto Figure 6.1.

ThepedestrianfencingontheUS181HarborBridgeshall have an arched top and meet the minimumheight requirements in accordance with the Joint BNSF/UPRR Guidelines for Railroad Grade Crossing Separations Projects,oritsmostcurrentedition,andbedesigned tomeetsharedusepathclearances in

accordance withAASHTO in the publicationGuide for the Development of Bicycle Facilities, 2012v,or itsmost current edition; refer toFigure 6.2. The Developer shall consult the UPRR and PCCAregardinglocations,ifany,thatrequiretheprotectivecontainment cage per the TxDOT Bridge Railing

Manual, Section 2, Bridge Railing for Pedestrians.Additionally,anyprotectionstructuresover railroadsshallfollowAREMAstandards.RefertoFigure 6.3 for railroadcrossinglocations.

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Figure 6.3 – Railroad and port crossing locations

Figure 6.1 – 54” pedestrian fence

Figure 6.2 – US 181 Harbor Bridge pedestrian fence



6.0PedestrianFencing

Fencefabricshallbeinstalledonpedestrianfencing.Fence fabricshallbemadeofweldedwiremeshormetalpickets.Maximumopeningofmeshshallbe2inches.Metalpicketsshallbespacedat4inchesoncenter, or that a 4 inch orbmay not pass betweenpickets.Fencefabricshallnotbeclimbable.Materialalternativesincludepaintedand/ortreatedcorrosion-resistantmetalfabric.

Opaque sealer on metal components shall meetall criteria in the TxDOT DMS, Section DMS-8100StructuralSteelPaints-FormulaandSection DMS-8101StructuralSteelPaints-Performance.

6.3 Pedestrian Fencing in the CorridorHeights,picketspacingandmaterialsofthepedestrianfencingshallmeetallTxDOTstandards.

6.4 Staples Bridge Pedestrian CrossingThepedestrianbridgeatNorthAlamedaStreetshallbedemolished,however,theoverheadsteelstructureshall be removed, transferred and re-installed orrebuilt.ThepedestriancrossingshallbereroutedonthenewNorthStaplesStreetbridge.Thetravelpath

currentlymeetssharedusepathdesignrequirements.TheDevelopershallensurethatthedesign’sshareduse path clearances are maintained and that thedesign remains in accordancewithAASHTO in thepublication Guide for the Development of Bicycle Facilities, 2012v,oritsmostcurrentedition.

ThesteelstructureonthepedestrianbridgeshallbeinstalledonthenewNorthStaplesStreetbridge.TheDevelopershalldetermineifthesteelstructureonthepedestrian bridge will be salvaged and reinstalled,or reconstructed. See Figure 6.5 for the existingstructure onN.AlamedaStreet. SeeFigure 6.6 for theinstallationofthestructureonthenewN.StaplesStreetbridge.

TheDevelopershalldevelopthedetailsforinstallingthesteelstructureonthenewbridge,completewithtrafficbarrierrailsandpedestrianfenceinaccordancewith TxDOT standards. Construction documents fortheoriginalsteelstructureareavailable.

TheDeveloper shall plan,design forand install thesteel structure in a manner identical to the originalstructure. Re-use of existingmaterials in originallyspecifiedconditionorrestoredtooriginalconditionisencouraged.All new introduced components and/orcomponentsreplacingfailed/unusableoriginalpiecesshallbegalvanizedtomatchthegalvanizationofthere-used structure. Visible patches or corrosion willnot be accepted. The Developer shall replace anyelementsofthestructurewhicharedamagedduringsalvage and reinstall operations. If the quality ofsalvageandreinstalldoesnotmeetTxDOTapproval,itwillbesubjecttoreconstruction.

Figure 6.4 – Examples of acceptable fence fabric Figure 6.6 – North Staples Street bridge pedestrian crossing with steel pedestrian arch

Figure 6.5 – Existing North Alameda Street bridge with steel pedestrian arch.



7.0Signage

7.1 Overhead Roadway SignageSigncolumnsshallincorporatetheProject’saesthetictheme.An open, vertical truss structure, as shownin Figure 7.1, is not permitted. Horizontal trussesarepermitted.RefertoFigure 7.2 foranexampleofacceptableroadwaysignage.

Thecolor,geometry,textureandscaleoftheconcretecolumns shall complement the Project’s aestheticthemeandbeconsistentthroughouttheProjectlimits.Acceptable aesthetic treatments include opaquesealer,texture,and/ormounted,cast-in-placeforms.Opaquesealeronconcreteshallmeetall criteria inthe TxDOT DMS, Section DMS-8110, Coatings for Concrete.

SignstructuresusedshallmeetallTexas Manual of Uniform Traffic Control and Devices (TMUTCD) for Streets and Highways and TP Section 13.1, Structures General Requirementsguidelines.

7.2 Shared Use Path SignageSharedusepathsignagesize,height,andtextshallconformtothemostcurrentversionoftheTMUTCD.

Content for the informational/wayfinding signage atshared use path termini shall be submitted to andapprovedbyTxDOT.(Refertosubchapter9.3SharedUsePath).

Sharedusepathsignageshallnotbeplacedadjacentto themainlanesoradjacent roadwayandshallnotinterferewithroadwayusers’navigation.

ItisacceptabletopaintpolesandmountingpiecesofsignageinafashionthatisinkeepingwiththeProjectaestheticandperTP Section 16.TheDevelopershallconsider the relationship between signage and thetwoheightsoffencinglocatedonthesharedusepath(refertosubsection6.2,PedestrianFencing).

Figure 7.1 – Overhead roadway signage, visibility of open vertical trusses shall not be accepted

Figure 7.2 – Example of concrete sign columns supporting horizontal trusses



8.0Lighting

8.1 Architectural LightingArchitectural lighting shall only be developed andinstalledontheUS181HarborBridge.Architecturallighting and roadway lighting shall complementeachother in order to provide visual and functionalefficiency. Maintaining the safety of vehicular andshared use path users shall be the priority of theDeveloper. Undesirable glare and distractions fromthe roadway are not permitted. Lighting shall nothinderthevisibilityofvehicles,pedestrians,bicyclists,norshipandaviationnavigation.

The US 181 Harbor Bridge will be a highly visiblestructure,especiallywhenviewedfromWhataburgerField, US 181 and the beaches of Corpus Christi.The Existing Harbor Bridge has a programmable,architectural lighting system capable of multi-colordisplay;refertoFigure 8.1.TheUS181HarborBridgeshallhaveanarchitecturallightingsystemthatmeetsorexceeds theappearanceandperformanceof theexistingbridge’ssystem.Architecturallightingdesignshall:

• Emphasizethebridge’sstructuraldesign

• Minimize adverse visual impact - lightequipment shall explicitly complement thesurroundingarchitecture

• Light surfaces evenly; avoid hotspots/darkspots

• Select fixtures based on efficient powerconsumption

• Protectfixturesfromvandalismifattachedinalocationaccessibletothepublic

• PrioritizeeaseofmaintenanceshallbeofhighpriorityandreviewedbyTxDOT

• Arrange fixtures in a manner that does notcreateglareordistractiontomotorists,marinevessels,aviation,pedestriansorbicyclists

• Selectfixturesthatperformwellgiventhehighvibration environment of bridges and harshcharacteristicsofthecoastalenvironment

• Employ robust and durable mountingarmatures

• Propose/supply controller(s) based onarchitecturallightingobjectives

All light fixtures shall be LED RGB. Architecturallightingmethodsshallinclude,butarenotlimitedto:

• Up-lighting and down-lighting of the bridgetowers

• Up-lightwashingofcables

• Washingofsuperstructurefascia

The proposed architectural lighting design shall becoordinated, reviewed and approved by the PCCA,USCGandFAApriortofinalreviewandapprovalbyTxDOT.

8.2 Roadway LightingRoadway light fixtures shall be upgraded fromthe TxDOT standard cobra heads and shall only

appear on the US 181 HarborBridge. Fixtures shall utilizeLED technology.The lightpole,arm, metal fixture housing andmounting components shallbe painted and/or treated withcorrosion-resistantmaterials.

Proposedroadwaylightingshallbe reviewed and approved byTxDOT. Roadway lighting ontheUS181HarborBridgeshallbe coordinated, reviewed andapprovedbythePCCA,FAA,andthe USCG prior to TxDOT finalreviewandapproval.Roadwaylightingproposedontheapproachbridgesshallbecoordinated,reviewedandapprovedbyPCCApriortoTxDOTreviews.

Lighting shall, at minimum, meet all criteria in TP Section 16.3.9, Lighting.

8.2.1 US 181 Harbor BridgeArchitectural roadway poles and luminaires shallbe vandal-resistant. The style of fixtures and polesshallbeelegantandcoordinatewith the themeandappearanceoftheUS181HarborBridge.

8.2.2 Approach Bridges and CorridorRoadway poles and luminaires shall be vandal-resistant. Luminaires shall be LED fixtures. Wherebridge structures intersect bicycle and pedestrianpaths, under-bridge lighting is of the utmostimportance for safety. Lighting provided under thebridge structures shall meet all safety regulations,andluminairesshallbeLEDfixtures.

Priortoselectingunderapproachbridgelighting,theDeveloper shall ensure aesthetic and photometriccompatibility with Northside Neighborhood parkimprovements.

8.3 Shared Use Path LightingSharedusepathlightfixturesshallbevandal-resistant.The scale shall be appropriate for pedestrians andbicyclists.Theappearanceoftheselectedfixtureshallbe complement the corridor aesthetic. Shared usepath lightingshallconformto thecurrentAASHTO’sGuidefortheDevelopmentofBicycleFacilities.

Where the proposed shared use path lighting fallswithin the limits of the US 181 Harbor Bridge, thedesignshallbereviewedandapprovedbythePCCA,USCG, and FAA prior to TxDOT final review andapproval.

Figure 8.1 – Existing Harbor Bridge multi-color display



9.0Hardscape

9.1 Noise WallsNoisewallsshallbedesignedbytheDeveloperandshallcomplementtheProject’saesthetictheme.

Theappliedaestheticsof thenoisewallswithin theProjectshallcomplementtheaestheticthemeofthecorridor.

Noise walls shall not be located on any bridgestructures.NoisewalllocationswillbedeterminedinaccordancewithNEPA.TheDeveloper,incooperationwithTxDOT, shall engage affected property ownersas they vote whether they would like a wall to bebuilt. Walls will be built based on majority rule ineach identified location. Refer to TP Section 3.2.5, Customer Groups.

Riprapshallbeinstalledundernoisewallpanelsatawidthoftwoincheswiderthanthecolumns.

Wherenoisewallsandbuildingswithinthepublicright-of-wayarelessthan10feetapart,theDevelopershallplaceconcrete riprap (four inchdepth)between thetwostructures.Thistreatmentshallfacilitateaccesstoutilitiesandgreatlyreducemaintenanceconcerns.Noisewalldesignshallconsideraccommodationsfor

removable panels where conditions may not allowenoughclearanceforequipmentaccessbetweenthewalls,utilitiesandothersitestructures.Anyremovablepanelsshallappearidenticaltopermanentpanels.

Thenoisewalldesignshalladdressslopinggrades.

Thedistancebetweenthebottomofthewallpanelsand the finished grade shall be two inches. Avariancebetweenzerotofourinchesispermissibleiftheaverageclearancewithinanysinglepanelistwoinches.

If the wall needs to step in height, it shall step inconstant intervals of four, eight or 12 inches until alevelsectionofatleastthreepanelsisincorporated.Forexample, ifwallpanelsare30 feetoncenter inlengthandthegradechangeistwofeetover120feet,thewalls shall incrementally step eight inches.Thetopedgeofthesubsequentthreeormorepanelsshallbeatthesameheightbeforethenextslopechangeisaddressed in constant intervals.

Ifadipinthegroundplaneoccurs,anadditionalpanelshallbeaddedto thebottomof thewall, regardlessofthewallheightdeterminedbythenoiseanalysisatthat location.

9.2 PavingPavingwithinthefacilityforpedestrianuseshallbelowmaintenanceandnon-skid.Pavingenhancementsarerequired.Acceptablepavingenhancementsinclude:

• Colored — integral color, stained or acid-etched (all surfaces shall be non-slip inpavementapplications)

• Exposed aggregate — seeded, colored, orhand-cast

• Other textural finishes — stamped, scored,broom(coarsetofine),salt,troweledsmooth,floated, tined/grooved, stippled, stenciled, orsponged

Useoftopicalpaint/stainonpavingisnotpermitted.Unitpaversarenotpermitted.

All pedestrian facilities in the Project shall adhereto theAmericanwithDisabilitiesAct (ADA) of 1990requirements.



9.0Hardscape

9.3 Shared Use PathThe shared use path facilities (its pavingmaterials/methods, layout and clearances) shall be designedinaccordancewithAASHTOinthepublicationGuide for the Development of Bicycle Facilities, 2012v,oritsmostcurrentedition.

Pavement striping, signage, and signals shall bedevelopedinaccordancewiththemostcurrentTexasversion of the TMUTCD.

ThesharedusepathdesignshallmeetallguidelinessetforthbytheAmericanwithDisabilitiesAct(ADA)of 1990, as enforced in Texas by theArchitecturalBarriersSectionoftheTexasDepartmentofLicensingand Regulation. An allowable exception, from

Proposed Guidelines for Pedestrian Facilities in the Public Right-of-Way (PROWAG), is where the shared usepathisalignedandadjacentwiththemainlanesof the corridor.

Shared use path connections to the hike and biketrailwillbedevelopedastrailheads.Thecommunityhike and bike trails will develop trailheads atconnectionpointstothesharedusedpath.Developeris responsible for providing connectivity where thecorridormeetstheplannedlocalhikeandbiketrails,adjacent to the corridor. The connection at the north shall bemadewithin theROW to the south sideofBeachAvenue;refertoFigure 9.1. The connection at thesouthshallbemadewithintheROWtothenorthsideofLakeStreet;refertoFigure 9.2.

ThemethodtheDeveloperchoosesforthetransitionfrom themainlanes to the hike and bike trails shallensurethatallgrades,railing,switchback/turningradii,vertical clearances, safety lighting, and signageareinaccordancewiththecurrentversionofAASHTO’sGuide for the Development of Bicycle Facilities.

All shared use path bridge structures and theircomponentsshall incorporatetheProject’saesthetictheme.

Constructionactivitiesassociatedwiththesharedusepathconnectionsshall takeplacewithintheUS181HarborBridgeProjectNEPAfootprint.

Figure 9.1 – Northern shared use path connection context Figure 9.2 – Southern shared use path connection context

Northernsharedusepathconnection

Schematicterminationofthesharedusepath

Schematicterminationofthesharedusepath

Southernsharedusepathconnection



10.0Landscape

10.1 OverviewLandscape design shall prioritize low maintenanceandlowwateruse.Xeriscapeplantsshallbeutilized.The work shall meet or exceed all criteria, in TP Sections 15.3.13, Trees, Shrubs, and Other Plant Materials; 15.3.14 Maintenance and Establishment Period; and TxDOT Spec Book Item 193 Landscape Establishment,andItem 751 Landscape Maintenance.

Plant material that creates sight hazards to facilityusers is prohibited. Vegetation shall meet setbackandsight triangle requirements.Novegetationshallbeplacedwherepruningwillberequiredinthefuturetomaintainsafesight-distances.Donotplaceplantsnearmerging lanes. Refer to theTxDOT Roadway Design Manual, Chapter2,Section5forrequirements.Alltreesshallbelocatedaminimumof30feetfrombackofcurb.Allshrubsandornamentalgrassesshallbelocatedaminimumof15feetfromthebackofcurb.Ifthereisnocurb,measurefromedgeofpavement.

The Developer shall not plant trees, shrubs,ornamentalgrassesorgroundcoverinlocationsthatreceiveshade fromapproachorcorridorbridges formore than six hours of the day during the growingseason.

Landscapeplantingbedsareareasthatincludeplantmaterialsuchastrees,shrubs,ornamentalgrassesorgroundcovers.Eighteen-inchwide,6-inchdeepmowcurbs shall separate planting beds and turf grass.Twoormoreadjacenttreesplantedlessthan15feetoncenterareconsidereda treegroveandshall becontained by a mow curb as specified above. Turfgrass shall not be locatedwithin plant beds or tree

groves.Theuseofsteeledgingisprohibited.

Wheremowcurbsareusedtoseparateturfgrassandplantbedortreegrove,thecurbshallfacilitateeaseofmowing.Angularmowcurbareprohibited.Curvilinearmowcurbs,asseeninFigure 10.1,arepreferred.

TheDeveloperisresponsibleformodifyinglandscapetreatmentswhereutilitieswillremain.

10.2 Approach BridgesLandscape installations shall occur outside of thePCCAandUPRRright-of-ways.

The Developer shall coordinate with TxDOT forstakeholder meetings to determine the level oflandscape installation where the approach bridgescross through neighborhoods. Refer to TP Section 3.2.5, Customer Groups.

10.3 CorridorThe Developer shall prepare a landscape designplan for the overall project area.Trees, shrubs andother plant materials shall be specified from therecommendedplant listsas listed in thesubchapter10.5,PlantListandDetails.

Treesshallbeplantedingroves.GrovesinthisProjectshall include 7 to 25 trees and shall be installedwithinatreebed.Shrub/ornamentalgrassesshallbeinstalledinlandscapeplantingbeds.

The Developer’s landscape plan shall emphasizekey intersections as defined by the station pointslisted below and the minimum landscape plantingrequirements:

• I37betweenSTA80+00andSTA91+00,50trees,1000shrubs/ornamentalgrasses

• I 37betweenSTA106+50andSTA122+50,60trees,600shrubs/ornamentalgrasses



• I 37betweenSTA143+50andSTA155+00,notrees,1000shrubs/ornamentalgrasses

• US 181/SH 286 between STA 1159+00 andSTA1162+50(seeI37betweenSTA122+50andSTA126+50)

• US 181/SH 286 between STA 1162+50and STA 1166+50, 100 trees, 1000 shrubs/ornamentalgrasses.

• US 181/SH 286 between STA 1166+50and STA 1174+00, 40 trees, 400 shrubs/ornamentalgrasses

• US181/SH286betweenSTA1132.00andSTA1159+00,refertosubchapter10.2,ApproachBridges,forneighborhoodlandscape.

In addition to the key intersection plantings, theDeveloper’s landscapeplanshallprovide landscapeplantingsthatestablishcontinuityalongthecorridor.The Developer’s landscape plan shall address thefollowingsegmentsandminimumrequirements:

Figure 10.1 – Curved mow curbs preferred



10.0Landscape

• I37betweenSTA67+64.90andSTA80+00,notrees,noshrubs/ornamentalgrasses



• I37betweenSTA165+00andSTA185+00,notrees,1000shrubs/ornamentalgrasses

• US 181/SH 286 between STA 1007+35 andSTA1132.00,notrees,noshrubs/ornamentalgrasses

• US 181/SH 286 between STA 1174+00 andSTA1181+00,20trees,noshrubs/ornamentalgrasses

• US 181/SH 286 between STA 1181+00and STA 1196+62.67, 35 trees, no shrubs/ornamentalgrasses

Treesshallbethree-inchcaliperorlarger.Palmtreesshallbeaminimumheightof12feet.Allshrubsandornamentalgrassesshallbethree-gallonorlarger.Ifathree-gallonsizeisnotreadilyavailableintheregion,theDeveloper shall requestTxDOTapproval for analternateinstallationofthreeone-gallonplantsinlieuofeachproposedthree-gallonplant.

Treeandshrub/ornamentalgrassplantingquantitiesare minimums and are to be equally divided alongeachsideoftheroadway.TheDevelopershallrelocate

plantingsinsuitablelocations,providedoverallplantquantitiesremainintact,when:

• slopesexceed4:1,

• thebackofcurbtoROWwidthislessthan25feet,or

• 25-footorgreaterclearancesareimpairedbyancillarystructuresand/orutilityconflicts

Persubchapter10.6,Irrigation,allplantmaterialshallbeirrigatedbydriporbubblerundergroundirrigationsystemprovidedbytheDeveloper.

Priortoplanting,alllandscapeplanting/treebedsshallbe treated with herbicides from TxDOT’s approvedmaterialslist.

10.4 Shared Use PathTrees shall be located along the shared used pathwhenlocatedatgrade.ProposedtreeplacementshallmeetallTxDOTrequirementsfortreeclearances,treespacing, avoiding sight hazards, planting on slopesandmaintenance.

Per200linearfeetofsharedusepath,theDevelopershallplantsixshadetreesoftwodifferentspeciesandtwoornamentaltrees.Minimumon-centerspacingforall trees shall be 16 feet. All trees associated with the sharedusepathshallbelocatedaminimumof30feetfrombackofcurb.Ifthereisnocurb,measurefromedgeofpavement.

10.5 Plant List and DetailsTheplantlistshallconformtoCorpus Christi Strategic Parks and Recreation Master Plan (CCSPRMP) (2012)and/or theWater Wise Plant List for Coastal Bend (WWPLCB) developed by the XeriscapeCorpusChristiProgram.TreespacingshallmeettherecommendationsshownintheCCSPRMP.Anypalmtrees listed on the WWPLCBshallbespaced10to15

Figure 10.3 – Tree planting detail

Figure 10.2 – Plant bed preparation and spacing



10.0Landscape

feetapartoncenter.Spacingofanytreesusedfromthe WWPLCBshallbedeterminedbycomparingthetree’smaturegrowthtothoselistedintheCCSPRMP andapplying thespacingrecommended for treesofsimilar mature height. Tree protection proceduresshall conform to Texas Technical Institute’s Recommendations, Procedures, and Guidelines for the Protection of Trees and Sensitive Landforms. Plant bed preparation shall conform toFigure 10.1,treeinstallationshallconformtoFigure 10.2.

10.6 IrrigationAll landscape planting beds and trees shall havedrip irrigation that is with battery-operated or solarpowered. All irrigation improvements shall be ofoperationalqualityforaminimumofthreeyears.Thesystem(s)shallutilizearainsensor(s).

InstallationofallirrigationsystemsshallmeetallCityof Corpus Christi requirements and shall be safelyaccessible to maintenance personnel. Componentsrequiringadjustmentormaintenanceshallbelocatedawayfromtraffic.

Irrigationmainlinesshallmaintainadistancebetweentreesandstructuresequaltoorgreaterthantheradiusofthematuredripline.

TheDevelopershallprovideTxDOTwithanirrigationdesignandsubmittalsforreviewandapproval.

Irrigation controller(s) locations(s) shall be reviewedby TxDOT. All irrigation controller boxes shall bemountedonaconcretefootingandlocatedinasafe,accessiblelocation,awayfromvehiculartraffic.

Refer to Figures 10.4 through 10.7 for irrigationstandards.

Figure 10.5 – Typical irrigation PVC/header connection

Figure 10.6 – Typical valve assembly for drip irrigation

Figure 10.7 – Typical installation of drip irrigation at trees, section and plan viewFigure 10.4 – Irrigation control boxes on footing



11.0FinishesSchedule

11.1 Color PaletteThecolorsselected for theProjectshallbesuitablefor the intended purpose. The colors should helpincreasethesafetyandeaseofuseofthefacilityandincreasethevisualappeal.Tomakecolorselections:

• Link elements widely separated by space.Colorsusedtolinkelementsshouldbesimilarinshadeandbrightness

• Highlightcertainelementstoattractattention.(Care shall be taken to avoid distractingmotorists.)

• Reducethevisualprominenceorconspicuousnatureofanelement.Mutedcolorsthatreflectlesslightthanelementsnearorbehindthemwill attract less attention.

• Contrastoneelementwithanother toenablequick identification and wayfinding. High-contrastcolorsusedclosetooneanotherwillattract attention to that location.

Colors thatare intended tobedistinguishedat longdistances should be brighter than those one wouldnormallyselectforobjectsintendedtobeviewedfromcloserangeinordertocompensateforhaze,fog,rainand other atmospheric conditions. Narrow lines ofcolor(onlyafewincheswide)willbelostwhenviewedfromfardistances.

The size of the roadway creates an importantrelationship between color, texture, pattern, andscale.Inordertobeappreciated,acolor,pattern,ortexturemustbelargeenoughtobevisible.However,

toomuchofasingletreatmentcanbecomemundaneor overpowering. Special treatments should accentratherthandominatealandscape.

Tonesofblueandothercoolcolorsshallbeusedinthis Project. See Figure 11.1 foranexampleofcoolcolorpalettes.

Provide color samples as specified in TP Section 15.4, Construction Requirements.

11.2 TexturesTexturesonconcreteshall beachieved through theuseofformliners,sandblasting,orwashingtoexposethe integralaggregate. Ifsandblastingorwashing isproposed,reliefdepthsshallnotdiminishthestructuralintegrityofthedesigncomponent.

Textures are most visually effective where trafficspeeds are slower. Rougher textures are moreappropriate when viewed from a distance and byhigherspeedtraffic.

The use of an uninterrupted horizontal texture ordesign alignment is discouraged. Any settling andresulting rotation over time will be more noticeableinahighlylinearapplication.Offsettingandbreakinguphorizontal lineswilldraw theeyeaway fromanyshifting.

11.3 Opaque SealerEnsurethecoatingissmooth,even,continuous,andfreeofdrips,runs,sags,holidays,wrinkles,orothercoating defects. Ensure the coating has a uniformappearance within all portions of the painted pieceandallrelatedpiecesandcomponentsoftheProject.

Figure 11.2 – Thematic textures

Figure 11.1 – Example of cool color palettes

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