ENGEO provided geotechnical recommendations and construction observation services for improvements at Boarding Area C of the Harvey Milk Terminal at the San Francisco International Airport. Improvements included the replacement of passenger-boarding bridges (PBB), replacement of apron pavement, and the construction of 1,200 feet of new waterline.
ENGEO contributed deep foundation recommendations for support of the PPBs and performed a seismic site-response analysis. Based on previous project experience with Boarding Area A, micropiles were recommended for the support of the PPBs. Pavements in the vicinity of the new PBBs required replacement and repair so ENGEO took the initiative to evaluated flexible and rigid pavement alternatives along with new pavement and overlay options. Assistance to the civil engineer on the project included developing pavement sections. ENGEO provided continuous observation during load testing and construction of the micropiles and additionally provided as-needed observation during construction of the new pavement.
Existing pavement conditions were highly variable. To handle this ENGEO worked closely with the project team to identify pavement areas where the base course and subbase could be re-used and areas that required complete replacement.