Colorado Opens North America’s Largest Wildlife Overpass Over I-25

Backed by a federal Wildlife Crossing grant, the $15 million bridge is built for large ungulates to cut crashes by about 90%.

Overview

The vegetated crossing spans six lanes of I-25 between Larkspur and Monument and reconnects roughly 39,000 acres of habitat.
CDOT says the 200-by-209-foot structure, about 400 feet including approaches, is tailored to elk and pronghorn behavior.
The project opened to wildlife on Dec. 16 as the final piece of the I-25 South Gap wildlife system of underpasses and fencing.
The total cost came to $15 million after design refinements, with federal Wildlife Crossing Pilot Program funds covering a major share.
Officials expect wildlife-vehicle crashes in the corridor to drop by about 90%, reflecting reductions recorded at similar Colorado crossings.