Prunedale Improvement Project

EA: 05-0161E

CRP: Mon-101-PM R91.2/100.4

CCA Date: 04/14/2025

This Prunedale project received a regional award in the 2015 AASHTO Transportation Awards for significantly improving traffic flow and winning the "Quality of Life/Community Development, Large" category. It enhanced safety, reduced congestion, and improved access to local businesses and residences. The project upgraded a 10-mile segment of U.S. Highway 101 from Russell/Espinoza Road to north of Echo Valley Road. It included new interchanges at Crazy Horse Canyon Road and Sala Road, an undercrossing for Espinosa and Russell Roads, an overcrossing for Blackie Road and Reese Circle, an additional lane at the U.S. Highway 101/San Miguel Canyon Road interchange, various local road improvements, and installed a concrete median barrier, permanently removing left turns across U.S. Highway 101 within the project limits. The landscape scope encompassed over 108 acres of erosion control, including the inaugural large-scale use of compost with over 45,000 cubic yards applied. Other landscaping elements included aesthetic enhancements for bridges, soundwalls, and retaining walls; biological and visual mitigation planting for oak woodlands and riparian impacts; and a creek realignment to accommodate local road improvements.