Station 56 ~ Reinforced Concrete Structure. This structure on The Aomon Group shows some blast damage. The upper face toward zero corners have diagonal cracks beginning about two and one-half feet below the roof and extending upward of 45° from vertical; these cracks extend into the roof and stop about three feet from the edge. Cracks are three hundredths of an inch wide at bottom. Minor spalling occurred around conduit embecded in the ceiling. Although this structure did not fail structurally, it suffered considerable damage. It is believed that an earth fill on the side toward zero and over the roof would have provided sufficient pro- tection for the building as designed, It is understood that the damage described did not result in any loss of data. Station 57 - Reinforced Limonite Structure on Reinforced Concrete Base, There was no damage to these structures. adequate. The design is considered Stations 60 and 62 ~ 75-foot Tower. Five towers were inspected; the tower at Site M southeast of Runit was dismantled prior to the inspection, None of the towers inspected showed signs of blast damage or effect except that the rolling doors on the cabs of the towers at Teiteiripucchi were bellied in and out with about four inch differential from normal. It is believed that this tower design is adequate. Stations 61 and 63 - Wood Frame Structure. showed any blast damage or effect, Station 64 - Wood Frame Structure. None of these structures Although these structures were damaged, it is felt that the design was adequate since they served and are still serving the purpose of protecting the generating equipment from the elements. Repair of the structures would be a relatively easy matter, These structures all showed evidence of partial failure, The main damage consisted of a "belly in" of the side of the structure toward zero with splitting and breaking of the two inch by six inch studs in the wall, blowing out of the main doors, and damage to louvers on the side toward zero, There was no evidence of movement of sills, plates, or roof joists, and no damage to the corner colums was noted. The Riiraai structure received the most severe damage, All vertical two inch by six inch studs in the face-on-wall were cracked or broken. Some cracking of the diagonal sheathing occurred, but the wall remained in one piece and is still standing. The opposite wall had three cracked studs near the mid point; these were caused by a "belly in" of this wall. The face-on louvers were badly broken; one half of main door was demolished; and the panels were blown out of the back door. Damage on Bokanaarappi consisted of six cracked studs on the face-on wall, slight damage to face-on louvers and one-half of the main door off at hinges. Damage on Teiteiripucchi consisted of six cracked studs on the face- on wall, some damage to face-on louvers, and main doors off at hinges. 5-309