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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 below the high waterline mark. The inspection of the remainder of the element and all other elements is the responsibility of the routine inspection. This structure was inspected using surface -supplied diving equipment and techniques. Diving operations were staged from the Caltrans dive boat "Scow". The boat ramp at the Tracy Wildlife Association was used. This boat ramp is just to the west of the bridge. This underwater inspection follows the procedures of Section 5.4 of the SM&I Procedures Manual. SUBSTRUCTURE All submerged elements were covered with a thin layer of marine growth which could easily be removed by the diver's gloved hands. 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 tidal water elevation was 1 foot above Mean Lower Low Water (MLLW) at the time of the inspection, based on the NOAA tide station Grant Line Canal Draw Bridge, CA (ID: 9414785). At the time of this inspection, the distance from the bottom of Girder 3 at Pier 5 to the water surface was measured at 17 feet. Where possible, water depths have been corrected to the MLLW Datum. The following corrected depths and/or miscellaneous conditions were noted: Pier 4: Left (west) nose mudline - 0.0 feet Right (east) nose mudline - 0.0 feet Pier 5: Left (west) nose mudline - 4.0 feet Right (east) nose mudline - 4.0 feet Pier 6: Left (west) nose mudline - 7.0 feet Right (east) nose mudline - 7.0 feet Element 210, Pier Wall -RC See ELI table for condition state and rating. Prior to this inspection the SNBI B.C.15 UW Inspection Condition Rating was not populated. 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 Condition Rating was directly transitioned from the NBI Item 61 Channel and Channel Protection Rating and was coded 6. The conditions present on the date of this inspection are consistent with a SNBI rating of 6. Prior to this inspection the SNBI B.C.10 Channel Protection Condition Rating was rated as 6. The conditions present on the date of this inspection are consistent with a SNBI rating of N. There are no channel protection devices in place. Prior to this inspection the SNBI B.C.11 Scour Condition Rating was directly transitioned from the NBI Item 113 Scour Critical Bridge Rating and was coded 5. The conditions present on the date of this inspection are consistent with a SNBI rating of 6. The footing is exposed at Pier 7. 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. UNDERWATER INVESTIGATION DETAILS UWI Required Y Last UWI 04/08/2025 Dive Type B - Routine UW Dive Mode D - Surface supplied Contractor N/A Contract No. N/A Supervisor Robert Hugel Tender Josue Ramirez UWI Frequency 60 months Water Type 1 - Fresh Max. Water Velocity Max. Water Depth Max. Visibility Water Surface Elev. Diver Backup Diver Next UWI 04/08/2030 0 ft/s 7.0 ft 1.0 ft ft Lucas Holland Shane Stirling UNDERWATER ELEMENTS INVESTIGATED Printed on: Tuesday 06/10/2025 10:32 AM Page 3 of 9 29C0028/AAAU/151624