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.