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SDDOT / Materials & Surfacing / Geotechnical / Soils Section
Soils Engineer: Robert Longbons
Phone: (605) 773-3725; Fax: (605) 773-5867
The Soils Engineer produces a Soil Report that includes design recommendations
for Roadway Designers and Pavement Designers that pertain to shallow or
surficial soils that are or will be involved in roadway construction.
Near-surface groundwater control is also addressed in the Soils report.
In addition, methods of subsoil improvement and reinforced slopes with
products such as Geogrid and Geotextile are generated by this group. A Soils
field drill crew samples proposed roadway cut-sections and occasionally
determines base course thickness in existing roadways scheduled for
reconstruction or pavement rehabilitation. A modern Soils Classification
Laboratory is operated under the direction of the Soils Engineer. As with
the Foundation Engineer, the Soils Engineer is available to assist with soil
problems that may develop during construction or in future maintenance
projects.
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