In the attached article please find the description of Glen Canyon dam near failure. Here are the details. Glen Canyon dam was constructed using 4 bag concrete, against the engineering recommendation of 5 bag. As the flood described in the document was happening, the flow rate was actually filling the spillway passages. The design never accounted for a situation like that. The bottom of the spillways (inside the dam) were curved where they bent at the bottom where they turned to exit the bottom of the dam about 40 feet above the base river level. As the vertical (unlined) filled ever higher as the flow increased, the portion of the passage at the corner began to cavitate. the engineers felt the structure begin to shake. They were so concerned that they applied the Band-aid fixes discussed. The text is accurate. I was privileged to be in a conference with the engineers (after the event was over) at Northern Arizona University. A real close call. Jim
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Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
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