INTERA served as a consultant on the Sisters Creek Bridge Replacement Design-Build Project (Project), which just received the Design-Build Institute of America’s (DBIA) National Award of Merit. The Project is one of four winners in the Transportation category for the year 2017.
The Project’s goal was to replace the existing bascule bridge with a new, high-level fixed span structure. DBIA has recognized the Project’s success for overcoming “numerous project challenges, such as poor soils, pedestrian safety concerns and a constrained project site to deliver solutions in ways that were never thought possible.” Project construction spanned 34 months with a budget of $43.7 million.
Led by INTERA’s Senior Coastal Engineer, Phil Dompe, PE, our contributions to the Project included: (1) bridge hydraulic analysis - simulating hydraulic conditions that the new bridge would withstand at 50-, 100-, and 500-year intervals; (2) bridge scour analysis - computing general, aggradation/degradation, and local scour at the bridge piers; (3) wave analysis - developing a 100-year wave model; and (4) abutment and wall protection design - developing recommendations for the proposed abutment and wall protection scheme to withstand projected wave and hydraulic conditions for the next 100 years. More details about INTERA’s solutions for shore protection, transportation infrastructure, inlets and waterways, flood risk management, and coastal resources management are available on our Coastal Engineering page.
National Award of Merit winners are eligible to win one of three Awards of Excellence in the areas of design, process, and teaming. The winners of these awards will be announced at the 2017 Design-Build Conference & Expo in Philadelphia, PA on November 8, 2017.