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Successful Horizontal Directional Drilling in the Lake Tahoe Basin

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The South Tahoe Public Utility District (District) owns and operates a mechanically complex, high-pressure, wastewater reclamation system in one of the most highly regulated regions in the United States. Working pressures in the force main range from 150 to 600 pounds per square inch (psi). This District is now replacing deteriorated reaches of this 28 mile long pipeline. One reach involved the installation of a new 30-inch diameter (ID) welded steel pipeline with 1/2-inch thick walls under environmentally sensitive Trout Creek and the associated meadow. Installation of the new pipeline using horizontal directional drilling (HDD) was the chosen method to satisfy agency environmental concerns. However, the District had experienced significant problems with the use of HDD in the past on much smaller diameter pipelines (10 inch through 18 inch ID) and had misgivings about using this method.
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Document Type: Research Article

Publication date: 2001-01-01

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