added to the Hardu.-k schedule in June 1958. Because c. its nature and possible tactical interest, three new Program 2 projects were created and an existing one extended in order to document the nuclear effects. Three projects of Program 34 (Projects 34.8, 34.9, and 34.10) were placed under the technical direction of Program 2. These are discussed in Sec. 2.4. Quince JAS a result, the Fig event was added ' to the schedule and detonated on August 18, 1958. The yieid was RRTED Project 1.4, Crater Measurements, measured the size of the crater produced by the subkiloton detonation. There were no project personnel in the EPG, as only a contractor survey was required. It was found that the crater produced was elliptical in shape, with the long axis roughly corresponding to that of the device. The diameters were 48 and 54 ft, respectively, measured from lip to lip. The depth was 9.7 ft below grade with a 3.6-ft lip above grade. At the time of measurement, D + 3 days, there was evidence of earth slides which resulted from severe rains that had occurred since the detonation. The crater was briefly observed on D + 1 day, prior to the slides. Based upon this observation and the measurements made a day later, it is estimated that the original crater was 2 to 3 ft deeper and 4 to 6 ft smalier in diameter from lip to ip immediately following the detonation. The objectives of Project 1.7, Overpressure Measurements, were to document the overpressure measurements resulting from a eto- nation and verify or extend existing scaling laws. The instrumentation con- sisted of 36 standard PT and Q gages containing pressure capsules located at ranges'from 40 to 700 ft from ground zero. As the yield of the device was uncertain, it was necessary to provide the above instrumentation to ac- comodate a wide range of pressures. * The Fig device produced a nuclear yield a? measured by radiochemistry. Twenty-eight of the 36 instruments provided good records. Some failures were experienced due to undetermined causes at the close-in ranges. It is felt that these could be the result of heavy ground shock and motion, which in some instanc . i iscs. Pres- sures recorded varied from D The points plotted against curves scaled up from ey 3: nuclear yield showed a reasonably close fit. oa There was, however, a minor deviation in the slope of the recorded curve which cannot be explained without further study of the records and investigation of possible sources of experimental error due to the closeness of the instru- ments to the detonation. Preliminary field analysis of the data indicates that, using existing scaling laws, pressures can be predicted for a. detonations with reasonable accuracy. TED Neutron flux measurements made by Project 2.4 were discussed in some detail in the Program 2 portion of this report. During the field phase of the operation, project participation was extended to include the Quince and Fig events and had as its objective the documenting of the neutron flux and spectra for the E>. Two neutron lines were established to obtain the desired data. One was in the direction of the extended long axis of the device and ran out to a distance of 1039 yd, and the other was perpendic- ular to the device's long axis and extended for a distance of 900 yd. From the data obtained it was learned that an asymmetric flux pattern was apparent, being approximately 30 per cent higher along a line perpendicular to the long axis of the device. The maximum dose along the short axis was 132,000 38 fd AFWL/HO 37