Construction Photo Album

Welcome!  Construction is well underway on the Hoover Dam Bypass Project: both the Arizona and the Nevada Approaches are finished and construction on the Colorado River Bridge is steadily progressing!  Scroll down the page (or use the Quick Jump menu) to see the most recent construction photos. As construction continues, this page will be updated periodically to give you a quick peek at the progress and on-going activities at the construction site.

Click on any thumbnail to view an enlarged version of that photo.  Please note that you will need to use the Back button on your browser to return to this page.  If you prefer a higher resolution image (300 dpi or more), you can also download these from our site using the High Resolution link located below each thumbnail.  Please note that these higher resolution images (which are provided in TIF format) will take longer to download.

Quick Jump:

Additional Images/Photos (Including Arizona Approach and the live webcam.)

Images from March 2008

Interim Surfacing on the Arizona & Nevada Approaches...

Las Vegas Paving performing compaction of the asphalt pavement on the Arizona approach portion of the project.

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Las Vegas Paving placing the first lift of asphalt pavement on the Arizona approach portion of the project.

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Colorado River Bridge...

In Arizona, pre-assembled Arch reinforcing steel cages are stockpiled and await placement as part of an Arch segment.

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View of underside of bridge spans 1 and 2 as seen from the existing US93 hairpin in Nevada.

Working approximately 95’ above the ground, an Obayashi / PSM, JV worker attaches the temporary orange overhang falsework brackets to the outside of the steel girder of span 2.

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View of spans 3 and 4 as seen from the deck of the bridge.

In the foreground, Obayashi / PSM, JV workers survey grade and adjust the overhang falsework brackets on the outside of the steel girder of span 2.

In the background, Olsen Beal crews place stay in-place decking for bridge span 3, between piers 3 and 4.

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Utilizing the south cableway crane system, Olsen Beal crews transport and place steel stay in-place decking for bridge span 3, between piers 3 and 4. Hanging on temporary supports between the girders, the bridge deck drain piping system can be seen.

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View of the bridge alignment, looking from Nevada towards Arizona.

In the foreground, crews from Steel Engineers place reinforcing steel for the deck of span 1, between Abutment 1 and Pier 1.

In the background, Olsen Beal crews place stay in-place decking for bridge span 3, between piers 3 and 4.

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View of the bridge alignment from the existing US93 hairpin in Nevada looking towards Arizona.

In the foreground, Obayashi / PSM, JV workers place concrete for Arch segment NV04-Left

In the background, across the Colorado River, the Arizona Arch segments, along with Pier 14 columns are visible, approximately 1100’ away.

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As seen from the existing US93 hairpin in Nevada, during a night shift operation, a concrete pump truck delivers concrete to Obayashi / PSM, JV workers for placement at Arch segment NV04-Left.

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View of a pre-assembled reinforcing steel cage being delivered to Arch segment NV03-Right from the Abutment 2 area in Arizona. This 25’ long cage weighs approximately 32,000 pounds and is delivered across the canyon with the south cableway crane system.

Visible just below the cage is the trolley assembly of the north cableway crane system.

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Images from February 2008

Interim Surfacing on the Arizona & Nevada Approaches...

View of the Arizona approach roadway prior to aggregate base placement. On ramp B, near the Arizona interchange, Triple J Trenching is visible excavating and installing conduits for future electrical crossings.

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Triple J Trenching crews place and compact backfill material for installation of conduits for future electrical crossings on the Arizona approach.

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On the Nevada approach, Las Vegas Paving is hauling, placing, and compacting aggregate base material onto the Nevada approach roadway alignment near the Nevada interchange.

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View of a haul truck placing aggregate base material onto the Nevada approach roadway alignment near the Hoover Dam Canyon Bridge.

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Las Vegas Paving shaping aggregate base material prior to compacting on the Nevada approach roadway alignment.

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Colorado River Bridge...

The final span 2 steel girder is being transported from the abutment 1 area for placement in span 2. This girder is approximately 100’ long and weighs 45 tons.

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Olsen Beal crews prepare cable rigging for hoisting and erecting steel girders for the Nevada approach.

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Delivery of the steel girders for the Nevada approach.

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View of the CO River Bridge (Mike O'Callaghan-Pat Tillman Memorial Bridge) progress as seen from abutment 1 in Nevada.

Steel girders for span 1 are erected with 3 of the 4 placed for span 2.

Olsen Beal crews are transported in a man basket to pier cap 3 in preparation for erection of the final girder for span 2.

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View of the Nevada approach columns with steel girders in span 2 erected along with 2 of the 4 girders erected in span 3.

At the bottom of Pier 5, the completed Arch is visible cantilevered off of the NV skewback footing.
 

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View of the CO River Bridge (Mike O'Callaghan-Pat Tillman Memorial Bridge) progress as seen from downstream of Hoover Dam.

At the left, the Nevada approach columns (Piers 1, 2, 3, 4, & 5) are visible with steel girders in-place for spans 1, 2, and 3. Near the bottom of Pier 5, newly constructed Arch segments cantilever off of the NV skewback footing.

To the right, the Arizona approach columns (Piers 14 & 15) can bee seen with the girder placement completed. Below Pier 14, on the AZ skewback, formwork cantilevers off of the footing.

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Images from January 2008

Colorado River Bridge...

Olsen Beal crews look on as the North highline crane hoists a 50 ton concrete certification weight.

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View of the future CO River Bridge (Mike O'Callaghan-Pat Tillman Memorial Bridge) as seen from abutment 1 in Nevada.

Center – The completed Pier 1 cap is awaiting steel girder placement. System scaffolding encases the right column of Pier 1.

Above the pier cap, the North highline crane is being certified prior to use with a 50 ton concrete block test load.
 

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View of the future CO River Bridge (Mike O'Callaghan-Pat Tillman Memorial Bridge) as seen from abutment 1 in Nevada. Both operational highline cranes can be seen in their fully constructed configuration.

Near the bottom of the photograph, piers caps for Piers 1, 2, 3, and 4 are visible.
 

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View of the CO River Bridge (Mike O'Callaghan-Pat Tillman Memorial Bridge) progress as seen from downstream of Hoover Dam.

At the left, the Nevada approach columns (Piers 1, 2, 3, 4, & 5) are visible awaiting steel girder placement.

To the right, the Arizona approach columns (Piers 14 & 15) can bee seen with the girder placement nearing completion.

Spanning the canyon above the Approaches, the 3” track cables of the highline cranes are visible.

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The 50 ton concrete block test load traverses the canyon via the north highline crane.

At the left of the photograph, the Arizona approach is visible.

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Crews from Steel Engineers assembling arch reinforcing steel in a template on the Arizona approach.

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Obayashi / PSM, JV field engineer performs construction surveying from the existing US93 near the Nevada hairpin area.

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View of the assembled precast temporary stay cable towerhead. These towerheads will be constructed on top of a 130’ tall temporary tower at Piers 5 and 14 as part of the cable stay erection system that will support the arches until closure. At the completion of arch construction, they will be removed along with the temporary stay cables.

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Images from December 2007

Colorado River Bridge...

View of the Nevada approach columns of the future CO River Bridge (Mike O'Callaghan-Pat Tillman Memorial Bridge) as seen from the existing US93 in Arizona.

From left to right:
In Arizona - Olsen Beal crews utilize a Manitowoc 2250 crane to assemble the trolley and attach the slack carriers for the highline crane system

Piers 5, 4, 3, 2, 1 - columns are complete with their pier cap visible above the cap falsework.

Abutment 1 – can be seen to the far right.

In Nevada - Olsen Beal crews utilize a Manitowoc M250 crane to perform work on the Nevada side of the highline crane system.

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At the NV skewback footing, Obayashi / PSM, JV crews assemble the form traveler to its full configuration onto the left Arch rib in preparation for construction of the third segment.

To the right of this picture, an additional crew assembles formwork in preparation for construction of right Arch rib segment two.

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High above the roadway alignment in Nevada, Olsen Beal crews continue construction of the new highline crane systems.

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Utilizing a Manitowoc M250 crane located in the abutment 1 area in Nevada; Olsen Beal crews attach the slack carriers onto the 3” cables of the South highline crane system.

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In Arizona, steel girders make up a reinforcing steel fabrication jig. On the exterior of this jig, iron workers will assemble Arch segment reinforcing steel cages. Once complete, the cages will be lifted off of the end of this jig and transported out to the form traveler and placed as part of an Arch segment.

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In Arizona, high above the roadway alignment at Abutment 2, Olsen Beal crews construct the highline crane system by attaching the trolley and slack carriers to the 3” cables that span the canyon.

Below Pier 14, on the AZ skewback, formwork cantilevers off of the footing in preparation for an arch segment concrete placement.

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View of the future CO River Bridge (Mike O'Callaghan-Pat Tillman Memorial Bridge) as seen from downstream of Hoover Dam.

At the left, the Nevada approach columns (Piers 1, 2, 3, 4, & 5) are visible awaiting steel girder placement. Near the bottom of Pier 5, newly constructed Arch segments cantilever off of the NV skewback footing.

To the right, the Arizona approach columns (Piers 14 & 15) can bee seen with the girder placement completed.

The towers of the new highline crane system can bee seen to the edge of the picture, along with their 3” cables spanning the canyon between them.

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View of the future CO River Bridge (Mike O'Callaghan-Pat Tillman Memorial Bridge) as seen from upstream of Hoover Dam.

Piers 15 and 14 appear to the left in this picture, while Pier 5, 4, 3, 2, 1 appear to the right.

Steel girders are in-place for the approach spans in Arizona while crews construct the new highline crane system.

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Images from November 2007

Colorado River Bridge...

In the contractor’s laydown yard, Obayashi / PSM, JV crews prepare formwork to cast concrete panels for the exterior of the Arch strut steel frames. A completed panel is hoisted by crane and transported to the staging area, awaiting erection.

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In Nevada, Olsen Beal crews reeve cabling through an 18 part block and tackle system for the backstay cable of the south highline crane system.

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Nicholson Construction continue to drill through pipe sleeves and nearly 60’ into solid rock to install post tensioning strand for the Arizona left temporary backstay anchor block.

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View of the future CO River Bridge (Mike O'Callaghan-Pat Tillman Memorial Bridge) alignment as seen from the existing US93 hairpin in Nevada.

Piers 4, 3, 2, 1 - columns are complete with their pier cap visible above the cap falsework.

Abutment 1 – can be seen to the far right. Beyond Abutment 1, projects the towers of the twin highline crane systems. Viewable high above the pier caps, the 3” diameter track cables for the new highline system span the canyon between the Nevada and Arizona highline towers.

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View of the future CO River Bridge (Mike O'Callaghan-Pat Tillman Memorial Bridge) as seen from Arizona, looking towards Nevada.

In the foreground, steel girders span between Abutment 2 to Pier 15, then from Pier 15 to Pier 14.

Across the canyon, the two white towers of the twin highline crane systems can be seen in Nevada.

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View of half of the lower support structure of the form traveler system as it is being prepared for installation onto the left Arch rib in Nevada. This support structure forms the bottom of the Arch segment while concrete is placed.

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In Nevada, Olsen Beal crews reeve cabling through an 18 part block and tackle system for the backstay cable of the south highline crane system.

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Utilizing a Manitowoc 2250 crane located in the abutment 2 area in Arizona; Olsen Beal crews continue assembling the new highline crane system.
 

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Images from September & October 2007

Colorado River Bridge...

Utilizing a Manitowoc 2250 crane located in the abutment 2 area in Arizona; Olsen Beal crews disassemble and prepare the S-70 Derrick Crane for removal and demobilization.

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View of the new slack carriers awaiting installation on the highline crane system.

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View of the completed Nevada towers for the new highline crane system located at the abutment 1 area in Nevada. These towers are 335’ tall.

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View of the future CO River Bridge (Mike O'Callaghan-Pat Tillman Memorial Bridge) as seen from Arizona, looking towards Nevada.

At the right of the picture, red temporary bracing project out from span 15 to form the deck overhang.

Across the canyon, a Manitowoc 2250 crane located at the Nevada hairpin on existing US93 delivers materials and workers to the top of Pier 5. Visible beyond it are the columns of the Nevada approach and new highline crane towers.

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View of the Nevada approach columns as seen from the crest of Hoover Dam.

From left to right:

 Pier 5 – At the top, Obayashi / PSM, JV personnel stress the pier cap transverse post tensioning.  At the bottom, formwork projects outward from the skewback footing, forming the first two segments of the Arch.

 Piers 4, 3, 2, 1 - columns are complete with their pier cap visible above the cap falsework.

 Abutment 1 – can be seen to the far right.  Beyond Abutment 1, projects the tops of the twin highline crane systems.

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Images from August 2007

Colorado River Bridge...

View of the erected steel girders for spans 15 and 16 as seen from Abutment 2 in Arizona. The bridge deck elevation will be approximately 9” above the girders top flange. In the background, Olsen Beal erects the Nevada towers for the new highline crane system.

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Obayashi / PSM, JV crews continue to construct overhang brackets and formwork onto the edge of the span 16 girder.

Across the canyon, in the abutment 1 area in Nevada, Olsen Beal crews erect the Nevada towers for the new highline crane system. To the right of this picture, the Manitowoc 2250 crane located at the Nevada hairpin on existing US93 is stored in it’s laid down, non-use configuration.

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View of the Nevada approach columns of the future CO River Bridge (Mike O'Callaghan-Pat Tillman Memorial Bridge) as seen from the existing US93 in Arizona.

From left to right:
Pier 5 – System scaffolding encases the right column for concrete finishing operations. At the bottom of Pier 5, formwork projects outward from the skewback footing, forming the first two segments of the Arch.
Piers 4, 3, 2, 1 - columns are complete with their pier cap visible above the cap falsework.
Abutment 1 – can be seen to the far right.

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Utilizing a Manitowoc M250 crane located in the abutment 1 area in Nevada; Olsen Beal crews erect the Nevada towers for the new highline crane system. The one on the left is currently 240’ while the one on the right is 160’ tall. When completed these towers will top out at 335’ in height.

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Obayashi / PSM, JV utilizing the S-70 Derrick Crane at Abutment 2 in Arizona to remove the temporary bracing between piers 14 and 15 through an opening in the steel girder alignment. Once complete, the final girder of span 15 will be set.

At the bottom left of this picture, crews continue to form the foundation blocks of the Arizona towers for the new highline crane system.

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View of the future CO River Bridge (Mike O'Callaghan-Pat Tillman Memorial Bridge) as seen from Arizona, looking towards Nevada.

In the foreground, at the abutment 2 area, work continues on construction of the foundation blocks of the Arizona towers for the new highline crane system, along with the completion of girder erection for spans 15 and 16.

Across the canyon, a Manitowoc 2250 crane located at the Nevada hairpin on existing US93 delivers materials and workers to the top of Pier 5. Visible beyond it are the columns of the Nevada approach.

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View of the future CO River Bridge (Mike O'Callaghan-Pat Tillman Memorial Bridge) as seen from downstream of Hoover Dam.

At the left, the Nevada approach columns (Piers 1, 2, 3, 4, & 5) are visible awaiting steel girder placement.

To the right, the Arizona approach columns (Piers 14 & 15) can bee seen with the girder placement nearing completion.

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Images from July 2007

Colorado River Bridge...

View of new stockpiled Cableway Crane cables located on the Nevada approach awaiting erection.

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Nicholson Construction utilizing a Manitowoc M250 crane to transport drilling equipment and materials to the location of the luffing guy anchor block for the new Cableway Crane system near the Abutment 1 area.

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Utilizing the Manitowoc 2250 crane located at the Nevada hairpin on existing US93, Olsen Beal crews construct falsework for the Pier 5 cap. Workers walk the steel beams situated 860’ above the Colorado River.

System scaffolding encases the columns of Pier 5 to allow access for grouting and concrete finishing operations.

To the right of Pier 5, Pier 4 can be seen.

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Obayashi / PSM, JV utilizing the S-70 Derrick Crane and a yellow man basket at Abutment 2 in Arizona to access the Pier 14 skewback footing where crews continue to form Arch segments.

Above the man basket, the formwork for Pier 14 pier cap can be seen. Concrete placement for this cap took place during the night time hours on July 20, 2007.

To the left of Pier 14, completed Pier 15 along with its cap can be seen.

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View of the future CO River Bridge (Mike O'Callaghan-Pat Tillman Memorial Bridge) as seen from Arizona, looking towards Nevada.

Across the canyon, a Manitowoc 2250 crane delivers materials and workers to the top of Pier 5. At the bottom of Pier 5, formwork projects outward from the skewback footing, forming the first two segments of the Arch. The blue formwork is the inner core of the Arch form traveler system. This system will be utilized to form the hollow inner portion of the Arch.

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View of the future CO River Bridge (Mike O'Callaghan-Pat Tillman Memorial Bridge) as seen from the existing US93 hairpin in Nevada. From left to right:

Pier 5 – system scaffolding encases the columns for grouting and concrete finishing operations. At the pier cap, carpenters continue to set falsework.

Piers 4, 3, 2, 1 - columns are complete with their pier cap visible above the cap falsework.

Abutment 1 – can be seen to the far right.

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Images from June 2007

Colorado River Bridge...

Olsen Beal crews erecting precast segments for Pier 14 left column.

Visible to the right and left are the completed columns of Pier 15.

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View of the formwork for the Pier 15 cap, ready for concrete placement.

In the background, visible between Pier 15 columns, Olsen Beal crews continue erecting precast segments for Pier 14 left.

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View of Piers 14 and 15 as seen from the crest of the Hoover Dam.

Olsen Beal crews utilizing the S-70 Derrick crane at Abutment 2 in Arizona to transport precast segments and erect Pier 14 left column.

To the left of Pier 14, the completed columns of Pier 15 along with the formwork for the cap can be seen.

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Olsen Beal utilizing the Manitowoc 2250 crane located at the Nevada hairpin on existing US93 to erect precast segments for Pier 5 left column.

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View of precast column segments, delivered to the Abutment 2 area, in preparation for transport to their respective columns by the S-70 Derrick crane.

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View of the bridge alignment as seen from the crest of the Hoover Dam.

Piers 15 and 14 appear to the left in this picture, while Pier 5, 4, 3, 2, 1 appear to the right.

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View of the delivered steel box girders, staged at the Abutment 2 area.

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Obayashi / PSM, JV continuing to assemble the inner core form of the Arch form traveler system. This system will be utilized to form the hollow inner portion of the Arch.

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Subcontractor, Nicholson, drilling holes for the rock anchors of the new highline back stay anchor located in Arizona near abutment 2.

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Images from May 2007

Colorado River Bridge...

Olsen Beal utilizing the S-70 Derrick crane at Abutment 2 in Arizona to transport precast segments and erect Pier 14 right column.

Visible above Pier 14 is the completed columns of Pier 15.

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Olsen Beal utilizing the Manitowoc 2250 crane located at the Nevada hairpin on existing US93 to erect precast segments for Pier 5 right column.

Visible to the right of Pier 5 is the completed columns of Pier 4.

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View of the South temporary stay cable anchor block located in Arizona near Abutment 2.

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View of the bridge alignment at abutment 1.

From left to the right –
Completed Pier 2 can be seen with the formwork removed from its pier cap. Pier 1 has the falsework in place waiting for reinforcing steel / formwork to construct the pier cap. The temporary stay cable anchor blocks are visible in the roadway alignment to the right of the abutment. Near the yellow Grove crane, the old Highline Crane tower foundations are being prepared for removal by blasting.

To the left of the temporary stay cable anchor blocks, the Pedestrian Access ramp zigzags up the mountainside from the future access parking lot where the construction office trailers are currently located.

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View of the bridge alignment looking towards Hoover Dam.

Left side of the picture –
Completed Pier 2, 3, and 4. Pier 5 right / left columns are in various stages of erection. Falsework for the Arch cantilevered off of the Pier 5 skewback footing.

Right side of the picture –
Falsework for the Arch cantilevered off of the Pier 14 skewback footing. Pier 14 right / left columns are in various stages of erection. The S-70 Derrick crane is setting precast segments for the Pier 15 left column from Abutment 2. Pier 15 right column is competed.

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View of the bridge alignment looking from Abutment 2 (Arizona) towards Abutment 1 (Nevada).

Foreground: completed Pier 15 columns are wrapped in scaffolding.

Background: Falsework for the Arch is cantilevered off of the Pier 5 skewback footing. Above the falsework, Pier 5 can be seen with crew erecting segments for the right column. Pier 4 is visible with the pier cap falsework in place.

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Looking down at Pier 5 skewback footing on completed Arch segments NV01 Right and Left. The falsework for segments 2 projects out over the canyon, ready for formwork / reinforcing steel placement.

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View of the bridge alignment looking from Abutment 2 (Arizona) towards Abutment 1 (Nevada) from above Abutment 2.

Foreground: Excavations for the temporary stay cable anchor blocks are visible in the roadway alignment near the footing of the S-70 Derrick crane. The crane is currently setting precast segments for the erection of Pier 15 left column.

Background: Pier 5 and the Arch segments in various stages of construction. Next are the completed Pier 4, 3, 2. Pier 1 that can be seen with the falsework in place for the pier cap construction. Abutment 1 is visible behind Pier 1.

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Looking down on Olsen Beal crews preparing to set the next precast segment at Pier 5 right as they work 230 feet above the skewback footing.

Visible below are the completed Arch segments NV01 Right and Left along with the falsework for segments 2.

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Images from April 2007

Colorado River Bridge...

Olsen Beal utilizing the S-70 Derrick Crane at Abutment 2 in Arizona to transport precast segments and erect Pier 15 right and left columns.

Visible below Pier 15 is the skewback footing of Pier 14 with the falsework for the Arch protruding outward.

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View of the South temporary stay cable anchor block located in Nevada near Abutment 1.

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View of delivered concrete being cooled with liquid Nitrogen prior to placement for construction of the Arch segment NV01-RT.

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View of the future CO River Bridge (Mike O'Callaghan-Pat Tillman Memorial Bridge) alignment as seen from the existing US93 hairpin in Nevada.

Abutment 1 in final stages of construction with the blockouts for the tie back anchors remaining to be filled.

Pier 1 is shown with falsework for the pier cap in place.
Pier 2 can be seen with the completed pier cap.
Pier 3 is visible with the completed pier cap along with climbing scaffolding surrounding the columns.
Pier 4 is visible with the completed pier cap.

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Images from March 2007

Colorado River Bridge...

Workers from Jake’s Crane prepare for the removal of the counter weights from the Link Belt TG1900 erected on the Pier 15 left foundation.  This worker is attaching hoisting slings onto the weights wile perched nearly 865’ above the Colorado River.
 

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Obayashi / PSM, JV utilizing a Manitowoc 2250 crane to construct / access Piers 3 and 4 from the Nevada hairpin on existing US93.

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View of the bridge alignment as seen from Arizona towards Nevada.

Piers 1, 2, 3, 4, 5 in various stages of completion.  Formwork for Arch segments NV01N and NV01S can be seen cantilevered off of the Pier 5 (NV skewback) footing.

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Jake’s Crane utilizing the S-70 Derrick Crane at Abutment 2 in Arizona to dismantle the Link Belt TG1900 from the Pier 15 left foundation.

Visible to the left of the crane is Pier 15 right in partial stage of completion.

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Crane close-up.
 

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Workers from Jake’s Crane utilizing the S-70 Derrick Crane at Abutment 2 in Arizona to dismantle the Link Belt TG1900 from the Pier 15 left foundation.  Crews are removing the boom section and transporting it to the laydown area on the Arizona approach roadway.

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View of the future CO River Bridge (Mike