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    Author(s): James P. WackerXiping WangDouglas R. RammerBessie M. Woodward
    Date: 2011
    Source: In: Proceedings of the 17th International Nondestructive Testing and Evaluation of Wood Symposium, Volume 2, Sept 14-16, 2011. University of West Hungary, Sopron, Hungary. pp. 513-521. (Edited by Ferenc Divos, Published by the University of West Hungary; ISBN 978-963-9883-83-3, volume 2).
    Publication Series: Proceedings - Paper (PR-P)
    Station: Forest Products Laboratory
    PDF: View PDF  (480.13 KB)

    Description

    The U.S. National Park Service acquired the National Historic Copper Mine at Kennecott, Alaska, in 1998. There was uncertainty about the condition of the timber-cribbing foundation supporting the concentration mill, the largest building in the mine complex. A comprehensive on-site evaluation of the timber cribbing foundation was performed in summer 2009. The inspection process included visual assessment, species confirmation, moisture content determination, stress wave scanning test, resistance micro-drillingcoredrilling, and decay testing. Extensive deterioration was found in the timber-cribbing foundation members at the lower floors of the mill building. The upper levels of the cribbing foundation exhibited much less deterioration, especially in areas where the timber cribbing was not filled with soil. Current efforts are focusing on a comprehensive structural evaluation of the Concentration Mill Building with the goal of stabilizing and preserving this historical mining building important to the cultural heritage of early 20thcentury America.

    Publication Notes

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Wacker, James P.; Wang, Xiping; Rammer, Douglas R.; Woodward, Bessie M. 2011. NDE investigation of the timber foundation in the historic Kennecott Mine Concentration Mill Building. In: Proceedings,17th International Nondestructive Testing and Evaluation of Wood Symposium, Volume 2, 2011 Sept 14-16, University of West Hungary, Sopron, Hungary. pp. 513-521. (Edited by Ferenc Divos, Published by the University of West Hungary; ISBN 978-963-9883-83-3, volume 2).

    Keywords

    nondestructive testing, inspection, timber, substructure, crib foundation, decay detection

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