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MoDOT New I-64 Seismic Retrofit

Owner/Client: Missouri Department of Transportation (MoDOT)
Location: St. Louis, Missouri
Services: Subsurface Utility Engineering

Geotechnology provided Subsurface Utility Engineering (SUE) services for MoDOT District 6 in support of the seismic retrofit of Interstate Highway 64 from 11th to 7th Streets and 22nd and 21st streets in downtown St. Louis.  SUE  Quality Level D through A services were performed in advance of retrofitting 47 piers for compliance with new seismic requirements.

Electromagnetics, Radiofrequency, and Ground Penetrating Radar (GPR) were used to trace the locations of utilities.  Utility locations were designated, surveyed by the project surveyor, and recorded on final drawings. Geotechnology provided Quality Level A vacuum excavation services as described in ASCE Guidance 38-02.

Additional services provided for this project included drilling, materials testing and sonic logging.