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Printed on:Thursday 10/03/2024 11:50 AM 29C0373/AAAP/136925Pageof3 Department of Transportation - Division of Maintenance Structure Maintenance & Investigations 8 UNDERWATER INVESTIGATION DETAILS - NOT APPLICABLE FOR THIS BRIDGE. STEEL INVESTIGATION DETAILS SCOPE AND ACCESS All elements were accessible by foot on and around the structure. The creek was dry during this investigation. All visible elements were fully inspected. A complete routine inspection was performed. NUMBERING CONVENTION The support numbering system used on the as-built plans for this structure is reversed from the standard numbering convention used by Structure Maintenance & Investigations. For this structure, the southern support is Abutment 1, and the northern support is Abutment 2. This report and all subsequent reports will follow the SM&I numbering convention. MISCELLANEOUS A new routine map view photo was added during this investigation. See Photo 1. DECK AND ROADWAY The previously reported pothole in the AC approach roadway located in the northbound lane at Abutment 1 has been filled with AC, however, there is still a depression up to 1 inch across the full width of the lane. (See Photo 2). The previously reported pothole in the AC approach roadway located in the southbound lane at Abutment 2 has been filled with AC. See Photo 3. WATERWAY The 12/05/2006 Hydraulic Report revised NBI Item 113 Code, Vulnerability to Scour, from 3 to 7 after scour mitigation work was completed by the County. Broken concrete rip-rap filling the hole at Abutment 2 underneath the bridge and protecting the upstream Abutment 1 and 2 wingwall slopes and portions of the approach road embankments were observed. The left Abutment 2 wingwall slope and the embankment was also protected with gabion baskets and broken concrete. The 12/05/2006 report compared channel cross- sections taken since 1995 and determined the channel has been relatively stable. It was noted that the channel has a wide flow area upstream of the bridge, which could result in contraction flow during the high flood events. Based on the field investigation in 2006 and the scour countermeasures that had been installed, the 12/05/2006 Hydraulic Report stated this structure is considered not to be scour critical at this time. However, it was recommended that the County continue to monitor the scour countermeasure and its performance periodically or during the high flood events as indicated on the 11/02/2005 Bridge Scour Evaluation - Plan of Action form. The 10/17/2002 Bridge Inspection Report indicated that the gabion baskets had pulled away from the left Abutment 2 wingwall. This condition still exists and the gap between the wingwall and the gabions are filled in with loose pieces of broken concrete. See Photos 2 and 3 dated 10/08/2016. This condition has not changed when compared to previous photos. There are no repairs required at this time but this condition will be monitored during future inspections. INSPECTION COMMENTARY - NOT APPLICABLE FOR THIS BRIDGE. CONDITION INFORMATION SPECIAL INSPECTION INFORMATION