In 2013, the Utah Division of Wildlife Resources and Utah Department of Transportation began exploring options to minimize wildlife vehicle collisions (WVCs) on a rural highway in southeast Utah. We determined that most WVCs in the state, relative to annual average daily traffic, were occurring along a 32-mile stretch of highway between the cities of Monticello and Blanding. These collisions were negatively affecting public safety and potentially having deleterious effects on wildlife populations. Analysis of carcass removal data from 2006 to 2012 revealed that 54 percent of these WVCs occurred within an eight-mile stretch of highway. In 2016, the first phase of the project targeted mule deer migration, and we installed a below-grade plate pipe arch structure. Within the first year following installation, camera traps recorded over 19,000 mule deer movements around the structure with a 98% successful passage rate. The success of this initial project promoted further work, and Phase 2 of the project occurred in 2019. Phase 2 included a structure specifically designed to provide a migration pathway for Rocky Mountain elk. Although prior research in the state found that cow elk were the most difficult animals to motivate to move under bridges, over overpasses, and through culverts, engineering and funding constraints made a concrete box structure the only feasible option for this project. In order to understand elk interactions with the new structure, we used GPS collar data, camera traps, and live view cameras. During the first spring migration following installation of the box culvert, elk were very weary of the structure and often paced the fence line in search of an alternative to crossing the highway. By fall migration 2020, however, elk were much less hesitant to use the structure, and collar data demonstrated minimal reluctance to pass through. This response has carried over through the spring 2021 migration and we anticipate that, through time, elk use of the structure will continue to increase. Although culverts may not be the best first option for maintaining connectivity across highways for elk, documented use of this structure indicates that with proper siting and size, culverts may be an effective option.