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/306864
The Belleair Beach Causeway provides an important link between the mainland and the beach communities of Belleair Beach, Belleair Shores, Sand Key, and North Indian Rocks Beach in Pinellas County, Fla. The causeway is a significant visual gateway for residents and visitors, provides recreational amenities, and most importantly, serves as a principal hurricane evacuation route for the barrier island. Time and the elements had taken their toll on the causeway's two existing bridges, which were completed in 1950. A 324-ft-long, low-level bridge crossed the Relief Channel at the west end of the causeway, and a 1376-ft-long structure, including a double leaf bascule and approaches, crossed the navigable channel of the Intracoastal Waterway at the east end. Both were determined to have exceeded their original life expectancy. Maintenance and operating costs had steadily increased during the past decade due to deterioration of the concrete components and the bascule's structural steel components and machinery. In addition, the existing causeway bridges did not meet current design standards and were classified as "functionally obsolete." A preliminary bridge type study led to selection of a low-level bridge crossing Clearwater Harbor to replace the Relief Channel bridge and a high-level bridge to replace the Intracoastal Waterway bridge. Final design of the Belleair Causeway replacement bridges was completed in July 2006. Construction of the new replacement bridges started in March 2007 and the project was completed on December 20, 2009. Incremental Launching of the Approach Spans The new high-level bridge over the I n t r a c o a s t a l Wa t e r w a y i s 3 3 5 0 - f t long and can be subdivided into the following units: • High-level spans—These spans consist of a 530-ft-long, three- span continuous structure over the navigational channel with 750-ft-long, five-span continuous units on each side. • East and west approach spans— These spans consist of 660-ft-long, nine-span continuous structures on both sides of the high-level spans. profile B ELLEAIR BEACH CAUSEWAY BRIDGE REPLACEMENT / PINELLAS COUNTY, FLORIDA Br IDgE DESIgN ENgINEEr: HDR Engineering, Tampa, Fla. Pr IME CoNTrACTor: Johnson Bros./Misener Marine Joint Venture Pr ECASTEr For hIgh-LEvEL SPANS: Standard Concrete Products, Tampa, Fla., a PCI-certified producer STEEL rEINForCEMENT: Gerdau Ameristeel, Tampa, Fla. awards: 2009 American Public Works Association Transportation Project of the Year—Branch, State & National Award Winner; Roads and Bridges Top Ten Bridge Project of 2010 by Nelson E. Canjura, HDR Engineering, John Meagher, Johnson Bros./Misener Marine Joint Venture, and Antonio Horrnik, Pinellas County Public Works Department belleair beach causeway bridge replacement project Incremental launching of long approach spans improves safety, reduces costs, and protects sensitive sea grass beds The high-level portion of the completed Belleair Beach Causeway Bridge in Pinellas County, Fla. Photo: HDR Engineering. 16 | ASPIRE , Summer 2010 P R O J E C T ASP10-1625.indb 16 6/21/10 12:19 PM