The Colorado Department of Transportation has reached the halfway point of construction for the Floyd Hill Project on Interstate 70.

This milestone marks a critical transition for one of the busiest mountain highway stretches in the U.S. The project aims to modernize the roadway and reduce the chronic traffic congestion that affects travelers entering the mountains.

Construction crews have shifted their primary focus from blasting to bridge work. According to project data, crews completed 211 blasts [1] to clear the way for the new infrastructure. This phase of the project involved the removal of more than 765,511 tons of material [1].

The effort to overhaul the corridor is a massive financial undertaking. Estimates for the total project cost range from $900 million [2] to $905 million [3]. The work is designed to improve safety and efficiency for the thousands of vehicles that navigate the Floyd Hill area daily.

CDOT crews recently celebrated the start of the bridge construction phase, which follows the successful completion of the heavy excavation and blasting requirements. The project is currently projected for completion in 2029 [2].

While the transition to bridge work signals progress, the project continues to manage the complex geography of the Colorado mountains. The shift away from blasting reduces the immediate need for the specific types of traffic disruptions associated with explosive demolition, though construction activity will remain constant for several years.

“The Floyd Hill Project on Interstate 70 has reached the halfway point of construction.”

The transition from blasting to bridge work indicates that the most volatile phase of the Floyd Hill Project is complete. By removing over 765,000 tons of material, CDOT has established the necessary footprint for a modernized highway. The remaining timeline through 2029 will focus on structural assembly, which typically allows for more predictable traffic management than the blasting phase, though the high cost of the project reflects the extreme engineering challenges of the mountain terrain.