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Progress Photos

    May 2009
      arrowGirder tops with pre-cast concrete deck panels in between awaiting final deck reinforcing.
      I-25 Trinidad construction project
        arrowReinforcing steel being delivered by crane to steel placers working on the viaduct deck.
      I-25 Trinidad construction project
      arrowGreen corrosion resisting epoxy coated reinforcing steel in place for the deck pour.
      I-25 Trinidad construction project
        arrowA deck finishing machine assures the correct slope and grade as fresh concrete arrives.
      I-25 Trinidad construction project
      arrowWorkers rake and vibrate fresh concrete into the reinforcing steel mat to eliminate air pockets.
      I-25 Trinidad construction project
        arrowFinished concrete deck slowly cures as the process continues further down the viaduct.
      I-25 Trinidad construction project

    April 2009

      arrowIn preparation for girder erection, cranes lift temporary supports, known as stiff backs, into place.
      I-25 Trinidad construction project
        arrowEach of the four girders require a stiff back support to span the splice between segments until the closure pour is completed.
      I-25 Trinidad construction project
      arrowPost-tensioning cable ducts are visible in this view. The post-tensioning cable ducts align with the ducts in the drop-in segment.
      I-25 Trinidad construction project
        arrowStiff backs, which are formed of structural steel, remain in place until girders are permanently spliced.
      I-25 Trinidad construction project
      arrowWorkers prepare to temporarily secure the first drop-in segment as it is lifted into place.
      I-25 Trinidad construction project
        arrowThe first drop-in segment straddles the railroad tracks as cranes are attached to each end and prepare to lift it into place.
      I-25 Trinidad construction project
      arrowAs seen from one of the stiff backs, the first segment is on its way.
      I-25 Trinidad construction project
        arrowIn this view from the ground, two drop-in segments are seen in place and the third is on its way.
      I-25 Trinidad construction project
      arrowA small splice space is formed between girder segments. The space will be closed with the concrete closure pour.
      I-25 Trinidad construction project
        arrowTwo cranes are used to lift the drop-in girder segments. View is from the viaduct abutment.
      I-25 Trinidad construction project
      arrowWorkers position the powerful jacks that will tension the cables and turn several girder segments into a single girder.
      I-25 Trinidad construction project
        arrowPrecise tension is applied to each group of cables at the abutment end. Cables will then be permanently capped.
      I-25 Trinidad construction project
      arrowClosure pours are complete (dark vertical bands) and the girders tensioned. Cranes again prepare to lift stiff backs.
      I-25 Trinidad construction project
        arrowStiff backs are being removed. The four completed long span bridge girders are ready for roadway decking.
      I-25 Trinidad construction project

    January 2009

      arrowThe contractor prepares to place concrete paving in the shoulder of I-25
      I-25 Trinidad construction project
        arrowA conveyor delivers fresh concrete to a paving machine which shapes the rough surface
      I-25 Trinidad construction project
      arrowWorkers following the paving machine give the shoulder a finished driving surface
      I-25 Trinidad construction project
        arrowAfter a standard curing period a core is drilled by inspectors to test pavement quality
      I-25 Trinidad construction project
      arrowInspectors test concrete pavement dowel bar location and verify bar depth
      I-25 Trinidad construction project
        arrowA new wall and riprap (stone) installed at the Commercial St culvert which drains NW Trinidad
      I-25 Trinidad construction project
      arrowThe north I-25 abutment formed and ready for steel reinforcing bar placement
      I-25 Trinidad construction project
        arrowThe north I-25 abutment with steel reinforcing in place and ready for enclosing formwork
      I-25 Trinidad construction project
      arrowWorkers build formwork for a viaduct pier diaphragm
      I-25 Trinidad construction project
        arrowViaduct pier diaphragm showing reinforcing at the terminus of the post tensioning cables
      I-25 Trinidad construction project
      arrowA center segment for the long variable depth Railroad spans sits on blocks ready for placement
      I-25 Trinidad construction project
        arrowView of the Railroad span awaiting placement of the center segments
      I-25 Trinidad construction project
      arrowConstruction continues and portions of the project are beginning to look finished.
      I-25 Trinidad construction project   I-25 Trinidad construction project
      I-25 Trinidad construction project   I-25 Trinidad construction project

    December 2008

      arrowFinal grading of the non-structure portion of NB I-25
      I-25 Trinidad construction project
        arrowPaving operations lay 12" of Portland Cement Concrete Paving
      I-25 Trinidad construction project
      arrowThe contractor's concrete paving machine in action laying pavement
      I-25 Trinidad construction project
        arrowTrucks deliver pavement to the back of the paving machine
      I-25 Trinidad construction project
      arrowFrom this view of the viaduct the temporary stiffeners are visible between the walls of the box girders I-25 Trinidad construction project   arrowWorkers will soon be preparing the girders to receive formwork for placing the deck
      I-25 Trinidad construction project
      arrowConstruction team pre-erection meetings ensure that girder placement proceeds safely and efficiently
      I-25 Trinidad construction project
        arrowCranes set the large variable depth girder segments cantilevered from piers near the railroad I-25 Trinidad construction project
      arrowThese variable depth girders are used to create the long span necessary to cross the railroad
      I-25 Trinidad construction project
        arrowThe deepened section of the variable depth girder occurs over the supporting pier
      I-25 Trinidad construction project
      arrowWorkers re-install the original historic brick pavers in Commercial Street which were removed and stored at the beginning of the project
      I-25 Trinidad construction project
        arrowMany of Trinidad's brick paved streets were declared protected historic components of the Corazon de Trinidad Historic District in 1977
      I-25 Trinidad construction project

    October 2008

      arrowNorthbound I-25 north of Commercial Street at final grade and ready for paving
      I-25 Trinidad construction project
        arrowBarrier reinforcing waiting for concrete on the viaduct and the Commercial Street off-ramp
      I-25 Trinidad construction project
      arrowPlacement of steel reinforcement at Commercial off-ramp
      I-25 Trinidad construction project
        arrowGirders at Nevada Ave
      I-25 Trinidad construction project
      arrowGirders over College St
      I-25 Trinidad construction project
        arrowGirders north of Railroad tracks
      I-25 Trinidad construction project
      arrowNorthbound I-25 north of Van Buren at final grade and ready for paving
      I-25 Trinidad construction project
        arrowMSE walls and abutments near final heights at Main Street bridge
      I-25 Trinidad construction project
      arrowSlip formed Type 7 barrier on the Purgatoire River bridges
      I-25 Trinidad construction project
         
      arrowThe Main Street overpass MSE abutments near completion.
      I-25 Trinidad construction project
        arrowWork continues on the MSE wall leading up to the Main Street overpass.
      I-25 Trinidad construction project
      arrowThe contractor continues to place girder segments for the viaduct and the Commercial Street off-ramp.
      I-25 Trinidad construction project
         

    September 2008

      arrowConstruction cranes prepare to set girders on the south end of the viaduct which includes the long span that crosses the railroad.
      I-25 Trinidad construction project
        arrowWorkers measure and fabricate the temporary steel-cross bracing and shoring towers that will secure the concrete girders during construction.
      I-25 Trinidad construction project
      arrowCranes place the first segment of the pre-cast post-tensioned segmental concrete box girder.
      I-25 Trinidad construction project
        arrowThe concrete segments will be tied together or 'tensioned' after all the segments are in place.
      I-25 Trinidad construction project
      arrowThe girder is tensioned with heavy cables threaded through reinforced steel ducts which are cast into the walls and floor of the segments.
      I-25 Trinidad construction project
        arrowTemporary shoring towers support one end of the segment until adjoining segments are placed and the girder is tensioned.
      I-25 Trinidad construction project
      arrowThe post-tension girder allows a long span to clear the railroad with minimal structure depth and cost. Note the duct openings at the end of the segment (floor of girder) through which the cables will be threaded.
      I-25 Trinidad construction project
        arrowWorkers mount temporary steel cross-bracing to prevent movement until the adjoining segments and deck are in place.
      I-25 Trinidad construction project

    August 2008

      arrowCrews place reinforcing steel for the concrete deck of Unit 3 of the Northbound viaduct. The deck of the viaduct is poured in monolithic units.
      I-25 Trinidad construction project
        arrowView of deck reinforcing steel with a noticeable super-elevation slope for the roadway curve.
      I-25 Trinidad construction project
      arrowFinal inspections and adjustments to the steel prior to placing or 'pouring' concrete.
      I-25 Trinidad construction project
        arrowA concrete pumper truck begins pumping fresh concrete into the Unit 3 deck.
      I-25 Trinidad construction project
      arrowWorkers vibrate the fresh concrete between the reinforcing steel bars to prevent voids.
      I-25 Trinidad construction project
        arrowOnce the pour reaches the proper level workers finish the surface of the new deck.
      I-25 Trinidad construction project
      arrowInspectors perform tests on each load of concrete to ensure quality.
      I-25 Trinidad construction project
        arrowAs concrete continues to arrive during the night, inspectors continue to test.
      I-25 Trinidad construction project
      arrowThe concrete pour (monolithic) for Unit 3 continues through the night until the unit is complete.
      I-25 Trinidad construction project
       
      arrowEarth movers lay in the final lifts for the Commercial Street off-ramp between MSE walls.
      I-25 Trinidad construction project
        arrowThe Commercial Street ramp at rough grade, covered and waiting for roadway surfacing.
      I-25 Trinidad construction project
      arrowNew curb and gutter completed on the Commercial Street exit ramp.
      I-25 Trinidad construction project
         
      arrowThe last of the Northbound viaduct piers ready for girders.
      I-25 Trinidad construction project
        arrowMain Street abutment ramp walls waiting for final I-25 grade and upper layers of MSE panels.
      I-25 Trinidad construction project

    July 2008

      arrowPre-cast bridge deck panel installation on the I-25 NB viaduct.
      I-25 Trinidad construction project
        arrowPre-cast bridge deck panel installation on the I-25 NB viaduct.
      I-25 Trinidad construction project
      arrowConcrete paving on NB I-25 to Main Street off-ramp.
      I-25 Trinidad construction project
        arrowNorthbound Main Street on-ramp and MSE retaining wall.
      I-25 Trinidad construction project
      arrowView from under the Commercial Street off-ramp.
      I-25 Trinidad construction project
        arrowCommercial Street off-ramp.
      I-25 Trinidad construction project

    June 2008

      arrowContractor placing Portland Cement concrete paving and curb and gutter on Commercial Street.
      I-25 Trinidad construction project   I-25 Trinidad construction project
      I-25 Trinidad construction project   I-25 Trinidad construction project
      I-25 Trinidad construction project  
      See the Benefits to Trinidad page for more information about local contractors and suppliers.

    May 2008

      arrowPre-Cast Concrete Box Girders top viaduct piers near Commercial Street.
      I-25 Trinidad construction project
        arrowMSE retaining wall for the Main Street on-ramp nearing completion.
      I-25 Trinidad construction project
      arrowConstruction cranes place pre-assembled steel reinforcement into the forms of a Viaduct Pier.
      I-25 Trinidad construction project
         
      arrowMixer and Pumper trucks place concrete for the last of the Northbound Viaduct Piers.
      I-25 Trinidad construction project
        I-25 Trinidad construction project
      arrowWorkers place concrete paving and barriers on the Commercial Street Ramp
      I-25 Trinidad construction project
        I-25 Trinidad construction project

    March 2008

      arrowMainline Overpass at Main Street being prepared for deck placement.
      I-25 Trinidad construction project
        arrowNorth Abutment of the Mainline Viaduct from Commercial Street near the Amtrak Depot.
      I-25 Trinidad construction project
      arrowNorthbound Ramp Structure over Purgatory River from the SH 12 Extension bridge completed during Phase I of the project. I-25 Trinidad construction project    

    February 2008

      arrowWorkers use cranes to set concrete girders for the bridge at Northbound I-25 over Main Street.
      I-25 Trinidad construction project
        arrowNorthbound Viaduct and Northbound Commercial Street Off-Ramp.
      I-25 Trinidad construction project
      arrowNorthbound Viaduct and Northbound Commercial Street Off-Ramp. I-25 Trinidad construction project   arrowPurgatoire River Bridge Girders and Piers.
      I-25 Trinidad construction project
      arrowPurgatoire River Bridge North Abutment.
      I-25 Trinidad construction project
        arrowMain Street Northbound On-Ramp.
      I-25 Trinidad construction project
      arrowElectrical conduit installation at College Street. I-25 Trinidad construction project    

Progress Photos: 2007 - click to view photos of construction progress during 2007.


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