During the interval between Operations IVY and CASTLE, both atolls were damaged by two typhoons, "Hester't in December 1952 and "Doris" in December 1953. Repairs were required on Parry, Eniwetok and Eninman Islands as a result of "Hester". The costs of these repairs are included in Contract Item A-33-C. Damage by typhoon "Doris" required repairs on Parry, Eniwetok, Rojoa and Bikini Atoll. The costs of these repairs are included in Contract Item A-67-C. Weather conditions after shot BRAVO created some delays in the firing schedule. During periods of delay Contractor's personnel were fully uti- lized in constructing new stations and reactivating stations used in previous operations. Planning was of necessity extemporaneous in nature and the Contractor was occasionally confronted with new work requirements with as little as two-day advance notice. The numerous program modifications resulted in an increased work load for all participants and delays caused by weather conditions were used to advantage in meeting the added work demands, The coverage given thus far to the effects occasioned by delays in the firing schedule have been logistical in nature. Of even gréater significance, perhaps, is the effect such delays have on the over-all cost of a test program. To date no study of sufficient scope has been made which would provide accurate cost data of this nature. However, an approximation was made by Holmes & Narver during the latter part of March 1954 which indicated that increased costs for support furnished by TG 7.5 amounted to about $60,000 per day This figure does not include any additional costs which were borne by the other participating agencies. In this connection, it was estimated by the Scientific Director that the cost to TG 7.1 for shot postponements amounted to about $9,500 per day.2 Both cost estimates were predicated on personnel strength during the last week of March and would be subject to decrease as the test program advanced and numbers of personnel at the proving ground declined, CHAPTER 6.1 6. COST DATA COST STATEMENTS A consolidated summary of actual and anticipated costs resulting from AEC participation in Operation CASTLE, as of 30 June 1954, is shown in Appendix B, Exhibit 7. Appropriate explanatory remarks appear after the cost tabulations. In addition to the consolidated cost summary, there is included the following cost statements reflecting costs at a more detailed level: a. 1. 2. 72 Consolidated scientific programs and projects, Exhibit 1 Ref. memo from CTG 7.5 to Director, DMA, dated 3 April 1954, Ref. memo from Alvin C. Graves to James Reeves, dated 3 April 1954,