U.S. Bank Stadium geosynthetic reinforced stress relief wall FIGURES 7 and 8 Fire damage: Melted geotextile and geogrid at RSS face FIGURES 9 and 10 Fire damage remediation: Reinforced shotcrete facing with shallow percussion-driven anchors damaged. The authors observed the damage within a few hours of the fire. The polypropylene woven geotextile face wrap and the polyester geogrid reinforcement that wrapped around the face had melted over a 30-foot (9.1-m) horizontal distance and over the full 30-foot (9.1-m) height of the RSS wall. The granular fill was starting to slowly slough out at the face in the damaged portion of the RSS. The Material Safety 28 Geosynthetics | February March 2020 Sheets identified that the geotextile polypropylene fiber melts at approximately 325oF (163oC), while the polyester geogrid melts at 400 oF (204 oC). These temperatures were apparently exceeded near the RSS face during the fire, since both products had melted to some degree. Figures 7 and 8 show the RSS fire-damaged facing. Geogrid samples were cut out of the fire-damaged portion of the RSS at various distances back into the fill from the face to determine the extent back into the RSS the geogrid reinforcement had been compromised. The forensic ASTM D6637 testing indicated that the geogrid reinforcement was only damaged within approximately 1 foot (0.9 m) of the RSS face. Based on these test results, it was determined that remediation would only be required at the RSS face and that complete excavation and reconstruction of the RSS within the fire-damaged area was not necessary. The facing remediation plan selected consisted of placing a new welded wire mesh on the face, shotcreting the face, and then installing a series of 3-to-5-feet (0.9-to-1.5-m) long Gripple percussion driven anchors within the fire-damaged area. The anchors were installed at a 3-foot (0.9-m) triangular spacing. The remediation measure was designed assuming that the outer 3 feet (0.9 m) of the geogrid and the geotextile wrap had been compromised. The anchors and shotcrete were installed from a swing stage by a construction crew that was experienced in confined space concrete work. Two 3-inch (7.6-cm) thick layers of shotcrete, reinforced with W4.0 × W4.0 welded wire mesh, was applied over the damaged RSS face. The design required that the percussion-driven anchors be installed with a hammer drill after shotcrete installation. Anchor proof testing indicated that all anchors exceeded