UNCLASSIFIED SECURITY CLASHFIC ATION OF THIS PAGE (When Dore Entered) . ATT REPORT DOCUMENTATION PAGE R BEFORECOM PLETINGFORM 2. GOVT ACCESSION WO] D RECIPIENTS CATALOG NUMBER WT-1609 | TTITLE foe (EX)Boneieion OPERATION HARDTACK Project 1.4 - PHYSICAL CHARACTERISTICS OF CRATERS 8. TYPE OF REPORT & PEMOD COVERED FROM NEAR-SURFACE NUCLEAR DETONATIONS 6. PERFORMING ORG. REPORT NUMBER WT-1609 (EX) AUTHONS) A. W. Patteson 6. CONTRACT OR GRANT NUMBEMa) bre 9S. PERFORMING ORGANIZATION NAME 4nNO ACDRESS 10. Special Projects Branch U.S. Army Engineer Research & Development Labs Fort Belvoir, VA 10. 1a: PROGRA ‘ 12. CONTROLLING OF FICE NAME AND ADORESS Headquarters Field Command Defense Atomic Support Agency Sandia Base, Albuquerque, New Mexico ELEMENT. PROJECT, TASK | UNIT NUMBERS MEPORT DATE May 10, 1960 13. NUMBER OF PAGES MONITORING AGENCY NAME & AODRESS(I! different fram Controlling Office) 1S. SECURITY CLASS. (of thie repert) UNCLASSIFIED $e. er 16. 17. 16. OECLASSIFICATION/ DOWNGRADI SCHEDULE ms 7 — CASTRIBUTION STATEMENT (of thie Report) Approved for public release; unlimited distribution. OISTRIBUTION STATEMENT (of the abstract entered in Bloch 20, if different trom Report) SUPPLEMENTARY NOTES This report has had the classified information removed and has been republished in unclassified form for public release. This work was performed by Kaman Tempo under contract DNA001-83-C-0286 with the close cooperation of the Classification Management Division of the Defense Nuclear Agency. 19. KEY BORDSE (Continue on reverse side if necessary and identify. by block number) Operation HARDTACK Craters Characteristics Nuclear Detonations 20. ABSTRACT (Continue on reverse side if necessary and identify by block number) The objective of this project was to measure and correlate with existing data the physical characteristics of craters (radius, depth, lip height and width, throwout, and permanent verticl ground-surface displacement surrounding the crater) resulting from near-surface nuclear detonations. DD oem7 1473s EDITION OF | wov 6515 OBSOLETE UNCLASSIFIED SECURITY CLASSIFICATION OF THIS PAGE (Phon Date Entered)