(Silver Award)   Diagonal Highway Reconstruction, Boulder, Colorado

Contractor:  Castle Rock Construction Company 

Owner:    City of Boulder (Public Works Dept.)

Engineer:  Loris and Associates                 

The City of Boulder Transportation Department collaborated with CDOT on this local agency project to design an impressive new “Gateway” into Boulder. This section of SH 119, also called the Diagonal Highway, used to be on the outskirts of the city, but has become a very busy area with what was a deteriorated asphalt road and no pedestrian or bike facilities.

Castle Rock Construction managed and built a complex project with an extensive new drainage system, off-street bike lanes, multi-use path, improved transit facilities, various colored concrete aesthetic components, durable concrete roadway, landscape features and art plazas for the community to enjoy.

The project also involved coordination with multiple departments within the City of Boulder, as well as the Colorado DOT, Regional Transportation District, contractors on adjacent projects, and 20 subcontractors onsite.

In addition to the placement of 27,973 SY of 8.5 in. dowelled concrete pavement for the roadway, the project also involved 31,000 SY of full depth reclamation of the existing roadway, which was recycled into road base for the new concrete paving. 

Some 11,600 SY of asphalt and concrete pavement were removed; 14,000 CY of embankment material was moved; and 10,700 SY of flatwork was completed, including a cycle track, multi-use path, sidewalk, exposed aggregate, colored sidewalk and colored median curb skirt.  The project also involved the construction of rain gardens, which not only added a touch of nature and beauty, but also serve to filter rain and storm water runoff.   The project also included monument foundations and drainage systems for art features.

To accommodate the public during construction, lane closures occurred only during off-peak times throughout the week; bike routes were maintained at all times; and intersection reconstruction work was limited to weekends.

The Diagonal Reconstruction project is the culmination of work by talented contractors whose efforts will benefit Boulder residents and visitors for many years. 


(Gold Award)  State Highway 42, Sister Bay, Wis.

Contractor:  Vinton Construction Company          

Owner:  Wisconsin Department of Transportation | Village of Sister Bay

Engineer: REI Engineering, Inc.| Village of Sister Bay

Winding through the northern half of Wisconsin’s famed Door County and along the shores of Green Bay, the state’s WIS 42 corridor is predominantly a two-lane highway connecting many communities where tourism is key.  

The corridor serves as both a ‘travel through’ roadway and a ‘main street’ to these communities, where both functionality and aesthetics are equally important.

Many of the businesses along the project make their living in only a few months of the year, so when reconstruction of a section of this important highway was needed in the Village of Sister Bay, the project requirements were carefully balanced with the needs of businesses and people in the area.

In consideration of the business community, the importance of tourism, and the seasonal population influx, construction was split into eight separate stages.

Vinton Construction proposed a Cost Reduction Incentive (CRI), allowing for placement of high early strength permanent concrete pavement in lieu of temporary asphalt early in the project.  Paving the 1.54 lane mile project with 20,389 SY of 8 in. concrete was completed 163 days ahead of schedule.  In addition to this major accomplishment, the construction cost was $173,000 under the contractor’s bid amount.

The project focused on safety enhancements, protection of the environment, minimizing future maintenance needs, and minimizing the disturbance to the local economy and tourism industry.

Public outreach was a priority to keep the local public officials and businesses informed of the progress.   This included weekly updates; public informational meetings; and day to day communication with local business owners.

Collaboration among the entire project team was exceptional, and included the efforts by the contractor, the engineer, and Wisconsin DOT.  Other hallmarks of the project included excellent design, planning and overall coordination with Village of Sister Bay staff and local businesses; 18 different contractors that were extremely attentive to their work and sensitive to the local businesses; and a Village Administrator who listened to and worked closely with the construction team and made timely decisions; and a construction engineering staff that understood and managed the intricacies and demands of this urban reconstruction project.


* ACPA Member.