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sets (S5, S6 and S7) were not included in the <br />analysis, because their low frequency indicated that <br />they would not significantly influence block size. A <br />Terzaghi Correction (Terzaghi, 1965) was applied to <br />the discontinuity spacing field data to convert the <br />apparent spacing to true spacing. The apparent and <br />corrected spacing for each discontinuity set are <br />summarized in Table 1. <br />Figure 1 Layout of the study area and mitigation measures <br />100 <br />80 <br />60 <br />w <br />40 <br />20 <br />U 0 <br />U <br />Figure 2: Block Volume Distribution <br />- <br />- ———————————————————————————————— <br />O 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <br />Block Volume (cubic feet) <br />Boulder Survey Data --41--Scanline Data <br />