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Department of Transportation - Division of Maintenance Structure Maintenance & Investigations INSPECTION COMMENTARY SCOPE AND ACCESS All elements listed in the "Underwater Elements Investigated" section of the report were inspected from the high -waterline down to the mudline. The inspection of the remainder of the element and all other elements is the responsibility of the routine inspection. This underwater inspection follows the procedures of Section 5.4 of the SM&I Procedures Manual. This structure was inspected using wade, float, and probe inspection techniques on Bent 4 to Bent 7; and surface supplied diving techniques on Bent 2 and Bent 3. To wade and probe, the inspector used an inflated drysuit for flotation and a pole, 8 feet long, to probe and inspect the structure. Inspection operations were staged from the Caltrans dive boat "Scow". SUBSTRUCTURE All submerged elements were covered with a thin layer of marine growth which was removed using scraping tools. This condition allowed for a 100% Level I inspection and a minimum of 10% Level II inspection of the submerged portions of the elements. For reference purposes, the distance from the waterline to the soffit was 15 feet, 2 inches at 1330 hours on the day of this inspection. This measurement was taken near the bent cap, Column 5, Bent 3. The following water depths/miscellaneous conditions were noted: Bent 2: Column 1(West): 1 foot Column 6(East): 1 foot Bent 3: Column 1(West): 9 feet Column 6(East): 8 feet Bent 4: Column 1(West): 1 foot Column 6(East): 1 foot Bent 5: Column 1(West): 0 Column 6(East): 0 Bent 6: Column 1(West): 0.5 foot Column 6(East): 0.5 foot Bent 7: Column 1(West): 2 feet Column 6(East): 2 feet Element 204, Column -PS Concrete See ELI table for condition state and rating. Prior to this inspection the SNBI B.C.15 Underwater Inspection rating was coded 6. The conditions present on the date of this inspection are consistent with a SNBI rating of 6. WATERWAY Prior to this inspection the SNBI B.C.09 Channel rating was coded 8. The conditions present on the date of this inspection are consistent with a SNBI rating of 7. NBI Item 61 decreased from 8 to 7. Prior to this inspection the SNBI B.C.10 Channel Protection rating was coded 6. The conditions present on the date of this inspection are consistent with a SNBI rating of N. There are no channel protection devices. Prior to this inspection the SNBI B.C.11 Scour condition rating was coded 6. The conditions present on the date of this inspection are consistent with a SNBI rating of 8. Prior to this inspection the SNBI B.AP.03 Scour Vulnerability rating was directly transitioned from the NBI Item 113 Scour Critical Bridge Rating and was assigned a temporary rating of (AB-T). The conditions present on the date of this inspection are consistent with a SNBI rating of (AB-T). STEEL INVESTIGATION DETAILS - NOT APPLICABLE FOR THIS BRIDGE. Printed on: Wednesday 06/18/2025 03:46 PM Page 3 of 7 29C0073/AAAS/151625