Stage 1B (Design 2019–2025, Construction 2025–2028)

Stage 1B is on the east end of the project, at approximately MP 45–46.5, and includes the Quartz Creek intersection as well as the intersection of the existing and proposed Sterling Highway (approximately MP 47). Stage 1B includes realignment of the highway and connection to the old Sterling Highway. Construction will include excavation, rock blasting, a pedestrian undercrossing (Coyote Notch), retaining walls, drainage, guardrail, pavement, and signage and striping. Excess material will be transported to Stage 3. 

Stage 1b has progressed eastward and reached Rock Cut 5 as of July 2026. Excavated material from Stage 1b has been hauled and placed in the Stage 3 corridor, with nearly 350,000 cubic yards of rock hauled and placed to date. 

Traffic has been placed on the primary Detour for the 2026 season with heavy traffic flows anticipated through mid-August 2026. 

Last Updated: July 29, 2026