As the geotechnical engineer for the County of Alpine, H&K provided geotechnical engineering and environmental services in remote areas of the county. H&K performed a scour study of the Wolf Creek Bridge on Dixon Mine Road in 2012 and returned in the Spring of 2013 to perform a geotechnical subsurface investigation to provide engineering design recommendations for earthwork and structural improvements. Project challenges included high scour potential and lack of competent material at depth. To mitigate the soil conditions, H&K provided design of driven H piles for the bridge abutment.
H&K also performed a subsurface investigation at the Hot Springs Creek Bridge near Grover Hot Springs State Park to provide geotechnical engineering design recommendations for a replacement bridge over Hot Springs Creek. This project was similarly challenged with unusual soil conditions at depth.
H&K’s environmental services for both project sites included performing an Initial Site Assessment per Caltrans’ environmental guidelines to assess recognized environmental conditions prior to bridge demolition and replacement.