Specifications include, but are not limited to: A Level I inspection (visual, tactile inspection) of 100% of the underwater elements for all bridges indicated by the project manager requiring underwater inspection, from the mudline to the High Water Mark (HWM). A Level II inspection shall be performed on a minimum of 10% of the underwater elements. A Level III inspection shall be performed on 5% of steel elements underwater, measuring the remaining thickness of the element. Soundings shall be taken at the upstream and downstream fascia of the bridge as well as 25 feet upstream and downstream from the fascia. These soundings shall be taken at the bent locations as well as at the mid-span if the spans are over 50 feet in length.
