Article   |   Jun 13th, 2013 Utility Accounts for Soil Liquefaction


While states on the West Coast, such as Alaska and California, are well-known for earthquakes, the U.S. Geological Survey indicates most of the United States is subject to seismic activity. Not all seismic events create liquefiable conditions; however, electric utilities, including Public Service of New Hampshire (PSNH), have determined the risk is significant enough to warrant safeguards against these dangers, particularly in plants and substations. PSNH has taken steps to address conditions under which soil liquefaction in such an earthquake could occur and how it could potentially undermine its substation equipment foundations. A PSNH design review team and its consultant TRC Companies Inc. reviewed the geotechnical conditions at a PSNH site and developed a design approach to address this geotechnical challenge.

Read the full article co-authored by Dan Butler, Manager - Civil & Transmission Engineering and Al Wironen, Principal Civil Engineer in Transmission & Distribution World Magazine.

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