Geotechnical challenges, including weak soils and high groundwater levels, were mitigated using advanced foundation techniques such as pile-supported structures, optimized embankments and surcharge areas. Mechanically stabilized earth walls up to 40 ft in height accommodated construction in a tight corridor and eliminated the need for perched walls.

Shifting the interstate alignment to the west preserved an energy transmission line in its current location, eliminating more than four years’ worth of design and relocation activities along with millions of dollars in relocation costs. The move also allowed major construction work to be completed outside the existing interstate footprint, reducing traffic shifts and increasing safety.

Robust safety efforts, including a sharp focus on best practices and Lane’s 4 Seconds 4 Safety initiative, helped the team complete more than 1 million worker hours on the project without a lost-time or recordable incident.

The project was completed at budget and on schedule in December of 2024.