Grand Iris & Transportation Category Winner - Gresham, Smith and Partners. Gresham, Smith and Partners served as the engineer-of-record for the Interstate 40/State Route 66 Diverging Diamond Interchange (DDI). The project is located at the gateway to the Great Smoky Mountains National Park between I-40 and state Route 66 at Exit 407 in Sevierville, Tennessee. Retained by the Tennessee Department of Transportation (TDOT), GS&P provided complete design development for all phases of the project, from preliminary roadway plans to signed and sealed roadway construction plans. The DDI’s unique crossover design transformed the existing interchange into a safer and more efficient intersection at one of the nation’s most heavily traveled interchanges.
Grand Winner - Building & Technology Systems Category - K. S. Ware & Associate, LLC. K.S. Ware and Associates and Centric Architecture were engaged by Metro Water Services to restore and renovate the historic George Reyer Pump Station, old boiler house, former water intake, and other ancillary structures at the Omohundro Water Treatment Plant in Nashville, Tennessee. Renovation of the 100 year old structures required clay tile roof replacement, interior demolition and reconfiguration, restoration of original steel windows with glass replacement, and interior and exterior masonry cleaning and tuck-pointing. In the end the renovation provided Metro Water Services with facilities that are ready for the next 100 years with significantly nicer and substantially more office and meeting space.
Grand Winner - Environmental Category - AECOM. The Gallatin Environmental Integrity Program is a pioneering union of state-of-the-art dry scrubber air quality technology, industry-leading storage of dry ash in a lined landfill, and an innovatively designed one-mile haul road that connects the scrubber facility and landfill, and operates within the active Gallatin Plant. The $391M investment required 18 months of engineering design, 35 months of construction, 1300 workers, more than 4 million work hours and was completed ahead of schedule and at a savings of $35M. The Project extends the Gallatin Plant’s life, enabling it to provide economical and environmentally sustainable energy for the next 20 years.
Grand Winner - Small Projects Category - Gresham, Smith and Partners. An existing bridge over Liberty Branch on SR-25 in Sumner County had become structurally deficient and functionally obsolete after years of service. Additionally, peak-hour traffic volumes and the functional layout of SR-25 would not facilitate traditional traffic control. Gresham, Smith and Partners served as the designer for the project which included roadway widening, substructure modifications and superstructure replacement of an existing two span structure with a single-span superstructure utilizing precast box beams and full-depth deck panels. Completed in a single weekend road closure, it was the first rural Accelerated Bridge Construction weekend-only closure project undertaken by TDOT.
Grand Winner - Special Projects Category - CDM Smith. Memphis WWTFs: Innovative Disinfection Evaluation When the City of Memphis began working with CDM Smith to negotiate its NPDES permits for the MC Stiles and TE Maxson WWTFs in 2011, it was agreed the plants would implement effluent disinfection prior to discharge into the Mississippi River for the first time. A 5-year process followed that evaluated disinfection technologies and included a side-by-side piloting program to refine the design criteria. Ultimately, peracetic acid (PAA) was selected as the most appropriate technology. The groundbreaking full-scale implementation of this technology is cutting edge and the City’s plants will be the largest PAA disinfection systems in North America.
Grand Winner - Structural Systems - Alfred Benesch & Company. ligo Bridge Erection Analysis – Category C: Structural Systems Massman Construction Company enlisted the services of Alfred Benesch & Company (Benesch) to perform a finite element analysis to assist with the erection of the Sligo Bridge for the Tennessee Department of Transportation. This project called for the replacement of an aging high steel truss bridge with a 5-span, 1,545’ welded plate girder structure. Utilizing 3D modeling software to analyze the stages of girder erection, Benesch provided the contractor with insight into behaviors such as deflection and girder stresses. This analysis helped develop an accurate, safe and efficient erection plan for this new bridge.
Grand Winner - Studies Research and Consulting Category - CDM Smith. Knox County Strategic Transportation Safety Plan A CDM Smith traffic engineering study completed for Knox County ranked roadway capital improvements by evaluating crash history and prioritized projects based on safety needs. A GIS-based tool was developed that ranks roadway segments—instead of intersections—by geometric deficiencies and safety needs. The Tennessee Integrated Traffic Analysis Network (TITAN) GPS based software was used and is continually populated as officers process crash scenes. Crash data was analyzed and mapped—using an innovative ArcView tool—which provided a visual representation of problem areas. The results of this study are used to respond to concerns of Knox County stakeholders.
Grand Winner - Water and Stormwater - Cannon & Cannon, Inc. THE KNOX STUDENT HOUSING The Knox student housing is a new development in a high density urban residential district near the University of Tennessee, Knoxville. Due to the limited available property, stormwater detention systems were not feasible or cost effective. Cannon & Cannon, Inc. provided an alternate method for stormwater management which included drainage calculations for a landscaped area within the rooftop amenities. Although “green roof” technology is not new to the industry, the project is the first in Knoxville to incorporate a green roof system in order to meet the City’s stormwater ordinance.
Grand Winner - Water Resources - Garver. The water source geothermal system at Nashville International Airport – the largest of its kind in North America – stands as a testimony to the vision of the airport’s leadership and the commitment of a united design-build team led by Garver and Blakley Construction Services. The airport’s entire terminal building is now cooled through this geothermal system, saving the airport nearly $500,000 in annual energy costs. Combined with irrigation water also being pumped from the quarry lake, the airport has eliminated 30,000,000 gallons of annual potable water consumption.