Specifications include, but are not limited to: 23 vertical support H-piles were observed to be considered complete loss of piling (Photo 3). An additional 151 vertical support H-piles were observed to have overstressing, buckling, localized 100% section loss, or have >70% section loss (measured) globally (Photos 4 and 5). These 174 piles are identified as areas of significant concern. Heat maps with the areas of concern are provided in Attachments. Bents 5 and 6 were found to be the most concerning area beneath the dock (Photo 6). Video and data collected from Global showed multiple adjacent piles along the bents to be near-complete or complete section loss at/near mudline. PND was able to confirm these findings during low-tide inspection. PND cannot assume any capacity is available in the complete section loss piles. There were jacketed repairs made in these areas; however, PND and ARRC do not have details for these repairs and depth of repair is unknown. ARRC performed an inspection of the pile cap and other adjacent components and did not observe any signs of overstressing caused by shear or bending. The northern portions of the west side of the dock (including gate access) shall remain closed to vehicle traffic until repairs are made. Limit the use of the remaining portions of the dock to vehicle travel, to that which is absolutely necessary until repairs are made. Based on ARRC’s observation of the pile caps and adjacent components at Bents 5 and 6 (most concerning areas), continued light vehicle use is acceptable in the short term. Repairing the concerning areas beneath the terminal building supports near the abutment prior to winter is recommended to prevent further overstressing from snow loads and snow removal equipment loads. If not repaired by winter, limit snow removal means to pickup trucks with plows or approved equal equipment. Begin engineering, procurement, and permitting immediately to address all areas of significant concern. Note: PND has provided ARRC with repair recommendations and priority of repairs. Begin engineering, procurement, and permitting immediately for temporary and permanent repair plans of Bents 5 and 6. Note: PND has provided ARRC with repair recommendations and priority of repairs.
