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The City of Portland, Oregon

Portland Water Bureau

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Horizontal Directional Drilling Videos

Horizontal Directional Drilling (HDD) is a low impact, trenchless method of installing underground pipes and service conduits. This method will be used to install the Willamette River Crossing 42-inch pipe deep under the Willamette River. 

A description of the three-stage process of HDD can be found here. To view videos that demonstrate the process, here's some helpful links.

 Horizontal Directional Drilling various stages of construction

Prime Drilling-HDD Explained

HDD Techniques-Drilling in Soft Rock

Lake Oswego Tigard Partnership- Underwater Pipe Pullback