GEOPHYSICAL INVESTIGATION OF NEAR-SURFACE FRACTURES AND CONDUITS IN A THINLY MANTLED KARST SETTING; A CONCERN FOR THE US-60/160 INTERCHANGE IN SPRINGFIELD, MISSOURI
The fractures within and around Springfield have been indentified from aerial photolineaments. Previous dye tracing investigations have correlated photolineaments at this site with dye trace paths and therefore potential karst conduits. An investigation of the photolineaments will be performed at the US-60/160 interchange on the south side of Springfield. Several photolineaments have been mapped in the vicinity of this intersection and typical fracture sets would suggest that some fractures extend beneath the interchange. Geophysical methods including electrical resistivity, VLF-EM and ground penetrating radar will be used to locate detectable fractures along the photolineaments. Where these fractures can be attributed to the photolineaments the investigation will further determine whether the fractures are in fact continuous underneath the interchange and therefore an engineering concern.