Transmission Tower Foundations in Weathered Rock

by Michael Finn, EBASCO Services Inc, Bellevue, WA, USA,
Robert E. Howard, EBASCO Services Inc, Bellevue, WA, USA,
Joseph A. Valdes, EBASCO Services Inc, Bellevue, WA, USA,

Document Type: Proceeding Paper

Part of: Uplift Behavior of Anchor Foundations in Soil


A case history is presented which discusses the siting, design and construction of the tower foundations for a transmission line in southwest Alaska. The project, completed in 1983, consists of a 17-mile (27. 4 km), 138 kV transmission line sited in a remote mountainous area on highly-weathered slaty argillite and graywacke rock. The design approach and criteria are discussed. Construction practices in the difficult terrain and resolution of problems encountered during construction are also discussed.

Subject Headings: Power transmission | Power transmission towers | Foundations | Weathering | Rocks | Case studies | Foundation design | Rock mechanics | Alaska | United States

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