North America’s Largest Wildlife Overpass: Completed In Less Than a Year

The Colorado Department of Transportation completed construction of the structure in Douglas County. Moose, elk, black bears, and mountain lions are now able to cross six lanes of interstate highway traffic along I-25 near Larkspur, Colorado, thanks to the opening of North America’s largest wildlife overpass. Prior to the system being built, there was an average of one wildlife-vehicle crash per day in the fall and spring, when wildlife is most active.

The grate construction works completed in less than a year ahead of schedule, and on budget. And the Greenland overpass was specifically designed to provide safe passage for elk and pronghorn, which need more space. It connects 39,000 acres of habitat on both sides of the 6-lane highway between Larkspur and Monument, and completes a system of smaller overpasses and underpasses constructed to improve safety along the 18 mile stretch near Castle Rock.