Funding Cuts Imperil Vital Wildlife Crossings in Colorado
Colorado is on the cusp of completing a landmark wildlife crossing project along Interstate 25, but ongoing budget constraints put future crossings at risk. For the current fiscal year, the state received no federal grant funding, while some previously awarded funds remain frozen under the Trump administration.
Financial support originally established by a 2022 state law for constructing wildlife overpasses and underpasses has also stalled, as budgetary challenges have led the Legislature to halt further appropriations.
Current and Planned Wildlife Crossings in the Centennial State
Despite funding difficulties, Colorado has made progress with several key infrastructure projects aimed at reducing wildlife-vehicle collisions:
- The Greenland Wildlife Overpass in southern Douglas County, a recently completed project.
- Wildlife crossing on Colorado State Highway 9 north of Kremmling.
- A crossing on U.S. Route 160 west of Pagosa Springs.
- An ongoing crossing near Vail Pass on Interstate 70.
Alongside these, Colorado and New Mexico are collaborating on a wildlife crossing at Raton Pass, located on I-25 at their shared border.
Expert Insight: Biodiversity and Connectivity at Raton Pass
Renee Callahan, executive director of ARC Solutions, highlights Raton Pass’s importance due to its exceptional biodiversity. This corridor encompasses species including black bears, cougars, mule deer, and elk, supported by the nearby Fishers Peak State Park.
“Wildlife movements do not recognize political boundaries,” Callahan notes, emphasizing the necessity of interstate cooperation to maintain habitat connectivity and genetic flow.
Colorado’s Leadership in Mitigating Wildlife-Vehicle Collisions
According to journalist and author Ben Goldfarb, known for his book Crossings: How Road Ecology is Shaping the Future of Our Planet, Colorado stands out nationally:
- The state has constructed more wildlife crossings than most others.
- Multiple additional projects are actively underway.
- These structures significantly reduce roadkill incidents for species such as mule deer, which are highly susceptible to vehicle collisions due to their migratory habits and large home ranges.
Regional Efforts and Broader National Context
Colorado’s work is mirrored by neighboring states. Wyoming has prioritized wildlife crossings for years, systematically planning and building infrastructure to improve habitat connectivity.
California is also advancing notable projects, including the Wallace Annenberg Wildlife Crossing over the busy U.S. Highway 101. This crossing addresses a major barrier for wildlife in an area with extensive human development.
These crossing structures are designed to accommodate species’ natural movement patterns, a critical factor in reducing fragmentation. For mule deer and other wide-ranging mammals, overpasses and underpasses can prevent tragic collisions and support population viability by linking vital habitats.
Additional reporting and sources from: Funding cuts threaten wildlife crossings
