B08 Attachment 13 Steel Pipes Memo 0004.pdf
Posted: July 1, 2026
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• Size: 0.92MB
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This memo from the U.S. Bureau of Indian Affairs concerns the Bannock Pumping Plant Modernization and Rehabilitation project, specifically addressing the encasement of 20-inch steel discharge piping.
Dated June 24, 2026, the memo is directed to Mark McNearney, P.E., and authored by Jerry Otto, P.E. It summarizes findings from a visual observation conducted by HDR in August 2024, which aimed to assess the location, depth, and condition of selected steel discharge pipes associated with the pumping plant's low and high-lift systems.
The inspection revealed minor pitting on the external surfaces of the pipes, which were covered with coal tar or wax taping. More significantly, it was discovered that concrete encasements were improperly installed around the high-lift steel pipes, with concrete encountered approximately six inches below the existing ground surface.
This misinstallation is attributed to excess concrete being poured into trenches during adjacent thrust block construction. The memo emphasizes that the construction contractor must verify the location and depth of this suspect concrete and take care not to disturb it during civil work or new pipe connections to prevent damage to the existing buried steel pipes.
An attachment provides further details and visual documentation of these findings.
Dated June 24, 2026, the memo is directed to Mark McNearney, P.E., and authored by Jerry Otto, P.E. It summarizes findings from a visual observation conducted by HDR in August 2024, which aimed to assess the location, depth, and condition of selected steel discharge pipes associated with the pumping plant's low and high-lift systems.
The inspection revealed minor pitting on the external surfaces of the pipes, which were covered with coal tar or wax taping. More significantly, it was discovered that concrete encasements were improperly installed around the high-lift steel pipes, with concrete encountered approximately six inches below the existing ground surface.
This misinstallation is attributed to excess concrete being poured into trenches during adjacent thrust block construction. The memo emphasizes that the construction contractor must verify the location and depth of this suspect concrete and take care not to disturb it during civil work or new pipe connections to prevent damage to the existing buried steel pipes.
An attachment provides further details and visual documentation of these findings.
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