2015 Triad Award Winner: Pena Boulevard, Denver

Castle Rock Construction Co. of Colorado replaced several miles of Peña Boulevard with 11-inch doweled concrete on a recycled stabilized road base. Their collaboration with the City and County of Denver, Denver International Airport, and Holcim (U.S.) Inc. resulted in a durable, smooth roadway with low environmental impact.

In late 2014, the City and County of Denver completed a $10 million project to replace several miles of Peña Boulevard with severe alkali silica reaction damage. The four-lane highway is one of Denver’s most important.

After Peña Boulevard, the main roadway to the Denver International Airport, developed severe alkali silica reaction (ASR) damage, the City and County of Denver began a $10 million repaving project. A wider shoulder and drainage system were added, and the new highway opened to traffic in late 2014.

The Denver International Airport crushes and stockpiles concrete removed from the airfield and other areas, to be recycled as Class 6 aggregate base course for new pavements.

Two miles of the most heavily damaged four-lane highway were replaced with 11-inch doweled portland-limestone cement concrete.

Castle Rock Construction Co. rubblized the existing pavement in a three-step process, to be used as drainable road base. First a guillotine breaker broke the concrete into large pieces (shown in foreground), then a multi-head breaker crushed the pieces into 6-inch minus aggregate.

Finally, the contractor used a steel roller fitted with a Z-pattern grid on the drum face, operated in vibratory mode, to settle and seat the rubblized pavement. This also assists in crushing the top three inches of the pavement to a diameter of 2-inch minus.

Castle Rock Construction Co. installed a trench drain along the low side of the pavement, lined with geofabric, to relieve water from under the newly constructed portland-limestone cement concrete pavement.

Davis Wade Stadium Expansion and Renovation, Mississippi State University. Jury comments: The university, contractor, and producer worked together in an interesting way, resulting in a unique material selection process.

Utah State Route 193 Overpass Retaining Wall. Jury comments: The project team provided an aesthetically pleasing, well-engineered solution that clearly had a significant impact on the community. The timeline was impressive, especially considering the amount of engineering and testing required.

Utah State Route 193 Overpass Retaining Wall. Jury comments: The project team provided an aesthetically pleasing, well-engineered solution that clearly had a significant impact on the community. The timeline was impressive, especially considering the amount of engineering and testing required.

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