Laserfiche WebLink
Printed on:Monday 06/03/2024 10:44 AM 29C0035/AAAU/128915Pageof3 <br />Department of Transportation - Division of Maintenance Structure Maintenance & Investigations <br />8 <br />UNDERWATER INVESTIGATION DETAILS <br />STEEL INVESTIGATION DETAILS <br />SCOPE AND ACCESS <br />The channel had 12 feet of water flowing under Span 9 at the time of the inspection. All elements were dry, except for the lower portions <br />of Columns 1 and 2 of Bent 10. The deck was inspected by having a driver slowly drive a vehicle while the inspector took pictures of <br />defects. The underside of the deck, superstructure, and substructure were inspected from the ground under the bridge. A complete <br />routine bridge inspection was performed. <br />The most recent underwater investigation was performed on 7/12/2021. SM&I divers conducted a thorough visual underwater <br />investigation of Bent 10. No significant structural defects were noted on either columns of Bent 10. <br />This structure is on a 60-month underwater investigation cycle. The next underwater investigation is due 7/12/2026. <br />NUMBERING CONVENTION <br />The as-built plans use stationing and layout that is reverse of that used by Structures Maintenance & Investigations. In this report the <br />standard SM&I convention is used. Abutment 1 is the south abutment. <br />DECK AND ROADWAY <br />There are 0.1 inch wide pattern cracks, spaced 1.5 feet apart on average, in the AC approach at Abutment 1. There are several 0.1 inch <br />wide transeverse cracks in the AC approach at Abutment 11. Refer to Photos 1 and 2. <br />The Abutment 11 right approach rail paving is cracked. The paving appears to have been underminined until it had insusfficient support <br />and then collapsed. The posts appear to have less embeddment depth and may not function as originally intended. Refer to Photo 3. <br />SUBSTRUCTURE <br />There is a 12 foot x 20 foot x 8 foot erosion gully in the front slope of Abutment 11. Refer to Photo 4. <br />WATERWAY <br />Structures Hydraulics has requested that special attention be given to channel migration toward Bent 9 as the pile cap is at a higher <br />elevation than the thalwag. No issues were observed during this investigation. <br />INSPECTION COMMENTARY <br />1 - FreshWater TypeB - Routine UWDive Type <br />Next UWI 07/12/2026UWI Frequency months 60UWI Required Y Last UWI 07/12/2021 <br />- NOT APPLICABLE FOR THIS BRIDGE. <br />CONDITION INFORMATION <br />SPECIAL INSPECTION INFORMATION