Elk, pronghorn, mule deer, black bears, and mountain lions are now able to safely cross Interstate 25 near Larkspur following the completion of the I-25 Greenland Wildlife Overpass. The Colorado Department of Transportation (CDOT) finished construction on the overpass earlier this month. The structure, which spans six lanes of traffic, is now covered with dirt and vegetation.
The project was completed ahead of schedule and within its budget. With the new overpass in place, 39,000 acres of habitat are connected on both sides of I-25 between Larkspur and Monument.
“Colorado is leading the way in reducing wildlife-vehicle collisions, and improving safety for both our motorists and wildlife. The I-25 Greenland wildlife overpass is a momentous feat, in our continued work to expand safe transportation options for both humans and wildlife, protecting critical habitat and our amazing outdoor spaces for generations to come,” said Governor Polis.
CDOT Executive Director Shoshana Lew stated: “The I-25 Greenland wildlife overpass is critical to the safety of both wildlife and motorists. The overpass is an essential component of the wildlife crossing system in this area, which is expected to reduce wildlife-vehicle crashes by 90%.”
The location of the overpass addresses a 3.7-mile gap from other existing crossings as part of the I-25 South Gap project. This larger initiative upgraded 18 miles of I-25 from Castle Rock to Monument by installing underpasses and fencing. Before these improvements were made, there was an average of one collision involving wildlife each day during peak migration seasons in fall and spring.
CDOT research has found that five underpasses along this corridor are already being used by mammals large and small. However, the new Greenland overpass was specifically designed for elk and pronghorn, which tend to avoid narrow passages and prefer wider open structures when moving across roads.
The site was chosen due to its connection with established animal corridors, proximity to water sources, preserved open space, and frequent movement by large game species.
