Olivehurst Roadway Climate Resiliency Project

The Olivehurst Roadway Climate Resiliency Project in Olivehurst, Yuba County, California aims to improve approximately five miles of residential streets by rehabilitating hot‑mix asphalt (HMA) pavements, installing storm‑drain systems, and adding multimodal facilities (sidewalks, curb‑and‑gutter, ADA ramps, bike lanes, striping, and traffic control devices). The geotechnical pavement evaluation report (Project No. S2749‑05‑01) provides detailed analysis of existing pavement conditions, subgrade soil characteristics, and recommends rehabilitation alternatives such as HMA overlay, full‑depth reclamation (FDR), or removal and replacement. Recommendations also include surface preservation treatments (slurry seal, microsurfacing, chip seal, cape seal) for streets in fair condition. The report outlines design traffic indexes (TI 5.0‑6.0), required design R‑values, and presents mix designs for FDR using lime and cement. • Approx. 25,960 ft (≈ 5 mi) of residential streets to be upgraded. • Existing pavement generally fair; some segments in poor condition requiring structural rehabilitation. • Recommended rehabilitation options: HMA overlay (5‑10 yr service life), FDR (≈ 20 yr), or full removal & replacement (longest life but costly). • Surface treatments (slurry seal, microsurfacing, chip seal, cape seal) viable for streets in fair condition (4‑7 yr life). • Subgrade soils primarily lean clay with varying plasticity; lime and cement stabilization recommended where needed. • Design traffic indexes set at 5.0‑6.0; design R‑values ranging from 5 to 30 depending on location.