CHAPTER II, SECTION 1 The military project was designated as Projec 3.7, Damage to Existing EPG Structures. The joint project objective was to record and evaluate damage from blast, thermal radiation, and water waves to selected AEC test structures, the military multi-story building on Site Janet left from Operation GREENHOUSE, and miscellaneous structures in camps. Self-record- ing gages were employed to measure air blast overpressures in the vicinity of structures of in- terest, to measure pressures on the front, top, and back of Station 1312 on Site Janet, and to measure accelerations of selected structures. Wave data were furnished by the Scripps Insti- tution of Oceanography from measurements obtained in Project 50.1, which is mentionedlater. Damage surveys were made for 10 events at Eniwetok Atoll on 37 structures, and at Bikini Atoll damage surveys were made for 10 events on 17 structures. Useful information was obtained which will be reported in ITR 1631 to be printed and distributed by the Technical Information Service Extension, Oak Ridge, Tennessee. Predictions of waves to be expected on shore from nuclear explosions at Eniwetok and Bikini have been made in past Operations, but there had never been a systematic plan for checking the accuracy of such predictions. The information regarding anticipated wave heights and FIELD ENGINEERING. The Resident Engineer had the responsi- bility of the Architect-Engineer service at the EPG, reporting directly to the Resident Manager. He was assisted in executing his duties by Assistant Resident Engineers and Department Heads. The Jobsite Engineering Division con- sisted of Design, Estimating and Analyses, Field Engineering and Surveys, Tests and Inspection, and Reports and Photography. The main functions of the Jobsite Engineering Division were to process and issue Home Office-prepared drawings for construction; to revise Home Office drawings where necessary to meet Users’ field changes or substituted materials; and to prepare design drawings for construction originating at Jobsite as authorized by the AEC,EBO, Home Office Engineering, or Jobsite Management. Personnel levels within the Division were coincidental with the over-all construction activities. During the interim period, a low level of 31 was reached in December 1956. At the start of the build-up on 1 March 1957 there were 37 personnel assigned, increasing to 90 by 1 August 1957. At the start of the operational phase on 15 March 1958, there were 146 per- inundations is vital to the planning and design sonnel assigned, but on 15 September 1958 this strength figure was reduced to 62. permission to arrange a contract with the Scripps one Assistant Resident Engineer was stationed at Bikini Atoll, where he acted as field liaison of test structures and dikes for protection of low areas. A request was therefore made to the Assistant Manager for Test Operations, ALO, for Institution of Oceanography for making the predictions of wave heights and inundations, and for a measurement to check their validity. A part of this project had for its objective the measurement of wave heights near structures where wave damage was anticipated. This plan During build-up and operational periods representative reporting directly to the Resident Engineer and was charged with the responsibility for the proper functioning of the field engineering forces at that atoll. These functions included inspection of all construction; interpretation of plans and specifications; job progress records the and reports; topographic, hydrographic, and construction control surveys; preparation of basic data for “as-builts’”; as well as coordination of engineering problems with local AEC and User representatives. Two Assistant Resident Engi- agreed that a Chief of Party and one surveyman from the EPG Survey Department would In addition, an Acting Assistant Resident Engi- was approved by ALO, and as a matter of convenience, the investigation was included under an existing contract of fle San Francisco Op- erations Office with the Scripps Institution of Oceanography. Technical supervision by Blast Study Group was provided, and it was assist in this work which was designated Project 50.1. neers at Eniwetok accomplished the administrative work load of the division at Eniwetok Atoll. neer was assigned to Johnston Island at the beginning of the build-up phase at that location to administer Engineering responsibilities par- The predictions of wave heights and inun- dation based largely on REDWING results were prepared and used by H&N for planning and design and were employed during the operational phase of HARDTACK for determination of -pro- tective measures. Wave measurements were made by 19 suitably located gauge stations on 8 events at Eniwetok Atoll. Wave heights were measured on Elmer for all events. At Bikini wave measurements were made by gauges at 19 stations on 2 events. Page 50 alleling those at Bikini Atoll. A position of Technical Facilities Coordinator, directly responsible to the Resident Manager, was created at Jobsite to execute new and revised engineering design requirements, and to provide on-the-spot liaison between the Users and the Jobsite Engineering Division involving last-minute revisions and additional require- ments. Headed by the Home Office Assistant Engineering Manager, Project Engineers, Design Engineers, and Design and Senior Draftsmen