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| description (summary) | 2007-5-25 | jW | Drawing of the section of the bottom portion of the west baulk of k109, which serves as the top of a high east baulk in unit J1 immediately to the east. The height of the baulk on the J1 side made drawing of it prohibitively dangerous because it had not been previously drawn incrementally. The features are those of J3. | [Input File: R525jW.j] |