ASPIRE is a quarterly magazine published by PCI in cooperation with the associations of the National Concrete Bridge Council. The editorial content focuses on the latest technology and key issues in the Concrete Bridge Industry.
Issue link: http://www.aspiremagazinebyengineers.com/i/306846
The Cotton Lane Bridge over the Gila River in Goodyear, Ariz., was created with a unique public/private partnership that involved the city, county, and two developers. Exterior girders had textural decorations reflecting the desert environment cast into them with the use of formliners. Bridge designs often must meet the concerns of a variety of participants, and finding innovative ways to ensure all needs are met becomes even more acute as more private organizations join with public entities to fund bridge designs. That proved to be the case for the Cotton Lane Bridge over the Gila River in Goodyear, Ariz., where the Maricopa County Department of Transportation (MCDOT), as the lead agency, joined forces with the City of Goodyear (COGY) and two local developers. The resulting precast concrete design met everyone's needs and produced a strikingly attractive structure that met a reasonable budget and was produced on schedule. As the city experienced strong growth, COGY and MCDOT officials recognized the need to alleviate traffic congestion in a region that was expanding with housing developments. They also wanted to provide an additional bridge crossing over the Gila River to improve the regional transportation system. In achieving these goals, the various stakeholders had specific priorities. MCDOT, which transferred ownership to COGY upon completion, wanted to ensure the project was constructed quickly to support the local development and to improve the regional transportation network, setting a one-year construction schedule. The two contributing developers (Sonterra Partners and Estrella Mountain Ranch) emphasized the need for an attractive design to draw potential buyers to the development while remaining within budget. Meanwhile, the Flood Control District of Maricopa County (FCDMC) wanted to ensure the new crossing preserved the area's rich environmental resources and unique river wildlife. Meeting these needs was complicated by the requirement that the structure optimize the modest construction budget. To achieve this, Michael Baker Jr., serving as the prime consultant, worked with COGY, MCDOT, FCDMC, and the developers through a profile COTTON LANE BRIDGE / GOODYEAR, ARIzONA LEAD AGENCY: Maricopa County Department of Transportation ENGINEER: Michael Baker Jr. Inc., Phoenix, Ariz. CONSTRUCTION MANAGER: Tristar Engineering & Management Inc., Chandler, Ariz. GEOTECHNICAL INVESTIGATION: Ricker Atkinson McBee Mormann & Associates, Tempe, Ariz. AWARDS: Best Bridge With Spans Between 75 and 150 Feet, Co-Winner, Precast/Prestressed Concrete Institute's Design Awards 2008; Top 20 Project, Southwest Contractor magazine, 2008; 2008 Honor Award, Arizona chapter of the American Council of Engineering Companies. Combination of local government and developers produces decorative, cost-efficient bridge design by David Lawson, Michael Baker Jr. Inc. PartnershiP succeeds PuBLIC/PRIvATE 38 | ASPIRE , Spring 2009 Aspire_spr09.indb 38 3/11/09 4:17:56 PM