The purpose of any inspection is to provide the information necessary to assess the condition (capacity, safety, and rate of deterioration) of a structure. The usefulness of an inspection depends, therefore, on the suitability and recording of the data (observations) obtained for use in later engineering evaluations. An underwater inspection is a condition survey; therefore, the diver should make and report observations and measurements that can be used by an engineer to make the engineering assessments. A part of the engineering assessment will be to determine the cause of the failure or damage; thus, it is important to detail and document the inspection.
For example, the diver should observe, measure, and report that a sheet pile wall has a hole measuring 2 feet by 3 feet, at a depth of 2 feet below mean low water (MLW), and that behind the hole is a 6-
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