structure, The base remained in place but was badly cracked; the tie dow rods (U-bolts) sheared off at the upper plate on the lagoon side, and the anchor bolts sheared off at the base on the ocean side. As was anticipa- ted, this structure was a complete failure. ‘Stations 12, 14, 15, and 19 ~ Reinforced Concrete Base with Steel Frame, These stations were not damaged, and design is considered adequate, Station 18 - Reinforced Concrete Structure. These structures were not damaged. The Aomon Group structure showed a horizontal crack about one-hundredth of an inch wide approximately eight inches below the roof along one side wall and two small diagonal cracks above the door. The wells adjacent to these structures show no damage. The design for these structures is adequate. Stations 20 a, b, c,d, e, and f - Reinforced Concrete Wall on Base. At Engebi, Stations 20 a and b tipped over towards the lagoon; Station 20 c tipped about 20° from vertical towards the ocean. At all stations, the base remained in place; the failure occurred at the connection between the wall and base and consisted of elongation and bending of reinforcing steel and spalling of. concrete on the compression side of wall, All other structures at this site were not damaged, On Runit, Stations 20 a, b, and c tipped over. Failures occurred in the foundation or in the connection of the wall to the footing. The failures did not cause loss of data. Stations 21 a, b, and c — Reinforced Concrete on Base. These struc- tures all were tipped over towards the lagoon by the Engebi blast. All bases remained in place; failure occurred at the connection between wall and base, It consisted of elongation and bending of reinforcing steel and spalling of concrete on the compression side of wall. Design of these structures is considered inadequate, Stations 23 3 and b ~ Reinforced Concrete Structures. The 23a struc- tures are Sandstone structures rehabilitated for Operation Greenhouse, The Runit structure is in good condition. The Aomon Group structure showed considerable cracking but was believed to be sound, The Engebi structure showed a great deal of cracking as well as some inside spalling and was not considered to be structurally sound. The Station 23b structure showed no blast damage, and the design is considered adequate, Station 25 ~ Reinforced Concrete Structure. This structure had not been opened so that an interior inspection could be made, The exposed portions of the exterior showed no serious damage. Diagonal cracks of about two~hundreths of an inch existed above the door opening, and there was a horizontal crack of the same width along the north wall about two and one-half feet down from the roof. The earth protection for this structure was blown away to a point about three feet down from the roof, 5-306