Collins performed the routine underwater inspection of eighty-nine bridges statewide for the Nebraska Department of Roads (NDOR).
In-house engineer-divers took channel cross sections and performed Level I and Level II underwater inspections using scuba diving techniques in water depths up to 25 feet. Nondestructive testing (D-meter) was performed to determine steel pile thickness measurements.
A report was prepared for each structure that included the NDOR Underwater Inspection Report Forms, condition ratings, and drawings showing locations of any deficiencies. An NDOR-certified underwater bridge inspection team leader signed each report.