LARGE PROJECT OF THE YEAR NOMINEE WHAT MAKES THE PROJECT UNIQUE This project was unique to Region 4 since it was the first time they utilized Highly Modified Hot Mix Asphalt (HMHMA) mix placed on one of UDOT’s roads. There were 56,000 tons of HMHMA placed in a 4” mill and fill section of the outside lanes. It was then capped with a 2” overlay across the entire roadway. The project also did some bridge pothole patching, parapet sealing, new guardrail and extension of parapets. Then it was finished off with some signage, striping and guardrail adjustments. This was the first time that Region 4 witnessed the placement of HMHMA with the CAT SDX screed plate system. This was an innovative way to achieve mat compaction quickly and with minimal effort. The project achieved mat compaction quickly with this screed plate/mix combination but struggled with joint density. Another unique quality of HMHMA is that UDOT allows this mix to be placed at a lift thickness of 6” per lift. SAFETY RECORD There were zero recordables, but a few near misses with high-speed traffic. U.S.-6 is one of the nation’s deadliest roads, according to a recent student travel guide. There are sections on this road that have steep drop-offs and sharp turns, and everybody seems to think the speed limit is just a suggestion. With the help of our traffic control engineer, we were able to reduce the speed through our work zone during construction. We also maximized the benefit of trucks not being able to accelerate up those steep hills which kept traffic speeds to a reasonable number. The credit goes to the boots on the ground. The project team was very involved in helping each other be safe and watch for oncoming traffic as it approached. CHALLENGES AND SUCCESSES One of the challenges faced was building a constant windrow for the shuttle buggy (MTV) to fill the hopper off the paver. On a typical mat thickness less than 4”, the volume that a paver holds in the hopper will continue to fill as you’re placing mix and will eventually overfill. This allows you to have gaps between windrows where the trucks are dumping. When you get thicker than 4”, which this project required, there isn’t enough volume between the windrow and what the paver can hold to place mix at widths of 16’. Therefore, you need a constant windrow or double stack the windrow (have two windrows) to be able to pave continuously. For this project, we employed a team member to nurse the trucks as they were dumping with a loader to ensure there were no gaps in the windrow. This was a bit of a surprise to us since, at bid time, we did not anticipate placing a 4.5” mat at 16’ wide. Through coordination and partnering with UDOT, we worked together to address this challenge and still deliver a smooth, long-lasting road. U.S.-6; TUCKER TO SOLDIER SUMMIT UTAH AND WASATCH COUNTY PROJECT START: July 2024 PROJECT COMPLETION: October 2024 KEY PROJECT TEAM MEMBERS: UDOT Geneva Rock Products Trapper Burdick, RE Josh Jensen, Geneva Rock PM Brent Hadfield, UDOT PM Bob Manookin, Superintendent Corben Bringhurst, Field Supervisor Shane Revoir, General Foreman Trent Jepperson, Foreman, Coughlin Milling Company ProTech Infrastructure AAA Barricade PROJECT COST: $9 million 30
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