| ..SUMMARY OF FINAL CLEARANCE SWEEP, SEPT. 8 TO 30. | |||||||||||||||||||||
| Date. | Sept. 8. |
Sept. 9. |
Sept. 10. |
Sept. 11. |
Sept. 11. |
Sept. 12. |
Sept. 12. |
Sept. 13. |
Sept. 22. |
Sept. 24. |
Sept. 25. |
Sept. 27. |
Sept. 28. |
Sept. 29. |
Sept. 30. |
Total. | |||||
| Group..................................... | 7 | 7 | 7 | 12 | 11 | 12 | 11 | 9 | 8 | 12 | 5, 6 | 11 | 11 | 6, 3 | 9 | ……………… | |||||
| Cut......................................... | 9 | 2 | 8 | 1 | 1 | 11 | 7 | 1 | 3 | ……………… | ……………… | ……………… | 4 | ……………… | ……………… | 47 | |||||
| Exploded................................ | 13 | 3 | 3 | ……………… | 2 | 20 | 9 | ……………… | ……………… | ……………… | ……………… | ……………… | ……………… | ……………… | ……………… | 50 | |||||
| Countermined........................ | 2 | ……………… | ……………… | ……………… | ……………… | 2 | 1 | ……………… | ……………… | ……………… | ……………… | ……………… | ……………… | ……………… | ……………… | 5 | |||||
| Total............................ | 24 | 5 | 11 | 1 | 3 | 33 | 17 | 1 | 3 | ……………… | ……………… | ……………… | 4 | ……………… | ……………… | 102 | |||||
1. Total mines laid by United States in North Sea Barrage................................................................................................................................ 56,611 |
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2. Total United States mines which survived after preamture explosions....................................................................................................... 52,219 |
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3. Total United States mines accounted for in sweeping operations............................................................................................................... 21,295 |
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4. Percentage of United States mines accounted for in sweeping: |
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(A) Based on total mines laid.............................................................................................................................................................. 37.6 |
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(B) Based on mines which survived laying......................................................................................................................................... 42.7 |
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5. Total British mines destroyed by United States................................................................................................................................................. 27 |
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Source: United States Navy, Office of Naval Records and Library, Historical Section, "The Northern Barrage" (Taking Up the Mines), (Washington, D. C.: Government Printing Office, 1920), 67.
