Hultgren-Tillis Engineers

Representative Projects: Commercial :

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Six Flags Marine World, Vallejo, California - We have completed numerous projects for Six Flags Marine World over the years including the major renovation in 1998 that added roller coasters and other rides to the park.  We have investigated site conditions and provided design criteria for underground and above-ground tanks for dolphins and other marine mammals. 

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Construction for the tanks included temporary shoring and permanent retaining walls.  Many of the roller coasters are supported on drilled piers that resist large lateral forces.  Projects are generally not authorized until fall or early winter and must be completed by spring.  We have helped plan and implement construction during wet conditions during the winter months.