Geocon performed a geotechnical pavement investigation and percolation testing for the design and construction of the Jackson Street and Avenue 50 Improvements Project, located along portions of Jackson Street, Avenue 50, and Avenue 52 in the cities of Indio and Coachella and the County of Riverside, California.  

Jackson Street often experiences heavy traffic, particularly during high-profile events like Coachella and Stagecoach. To support local communities and event visitors, the project involves roadway widening, pavement rehabilitation, and the construction of asphalt concrete pavements and mill overlays. Additional improvements include upgraded curbs, gutters, sidewalks, cross gutters, driveways, utility relocations, and drywell enhancements for stormwater management. 

Geocon’s investigation aimed to assess existing pavement conditions and thicknesses, perform deep drywell percolation testing, and provide recommendations for the design and construction of the improvements. The scope of work included utility mark-out, field investigations, and performing 12 roadway cores to measure pavement thickness and collect subgrade soil samples. We also drilled three deep drywell percolation test borings, conducted percolation testing, and analyzed the soil samples in the laboratory to evaluate resistance values and grain size distribution. 

Geocon provided several pavement rehabilitation options which enabled the lead agencies to choose the appropriate design option. When a stormwater mitigation trench was added to the design after our field investigation, Geocon leveraged geotechnical data from other local Geocon projects to support the design team, further enhancing the project’s development.