I-81 Corridor Safety Improvements

Froehling & Robertson, Inc. provided drilling, soils laboratory, as well as Quality Control (QC) field and laboratory services for the $75 million design build I-81 Corridor Safety project. The project consisted of a constructing an additional truck climbing lane in the southbound direction of Interstate 81 from mile marker 120 to mile marker 125.

During the course of this project, F&R performed roughly 250 test borings and drilled eight groundwater observation wells. In addition to our drilling services, F&R provided laboratory testing of soil and rock samples obtained during the drilling process, coordinated permits and clearance from respective authorities and utilities, coordinated traffic control and clearing services, and
performed monthly monitoring of the groundwater observation wells.

Following completion of the final design, F&R was engaged to provide the required QC field and laboratory inspection and testing services required by the Quality Assurance and Quality Control Plan for Design Build Project as outlined by VDOT. All testing procedures were performed in accordance with VDOT specifications. These services included soils and cement stabilized soils for compacted fill used to develop the final grades, as well as concrete testing that included reinforcing steel, slump, air content, temperature, unit weight, compressive strength test specimens, and chloride permeability. F&R’s QC services also included inspection and testing for the new asphalt pavement that included all three lanes and shoulders of the 5 mile roadway section and wall construction. Metals/NDT services were also required for the erection of structural steel on three replacement bridges.

In order to accomplish the QC portion of this project, F&R staffed the project for the entire project duration with a VDOT Certified Senior Inspector and VDOT Certified Level I inspector. During paving operations, F&R supplied up to 9 VDOT Asphalt Certified Inspectors to handle the multiple shifts and aggressive paving schedule.