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Arizona Among Top Ten States for Vehicle-Caused Power Outages

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Friday, August 23, 2013   

PHOENIX – Arizona had 48 major power outages last year, according to the Eaton Corporation, which tracks this information.

Most of Arizona's outages were storm-related, but the state also tied for ninth among the states for vehicle-related outages.

The Obama administration has issued a report saying severe weather is the number one cause of power outages, and has announced plans to strengthen the power grid, asserting that climate change will increase the intensity of storms.

Josh Saks, legislative director of the National Wildlife Federation, says it's a wise move.

"This report is a great step forward for the White House,” Saks says. “They've acknowledged there's a problem. They've acknowledged this problem in one small space – the energy grid.

“But we recognize this is part of a broader plan and we look forward to working with the White House to address climate change issues broadly."

Since so many of Arizona's power outages are the result of storms and vehicle crashes, why isn’t the state putting more lines underground?

Patty Garcia-Likens, spokeswoman for the Salt River Project, says the answer is simple – cost.

"We're looking at a cost of about $400,000 a mile to put them overhead,” she explains. “That's compared to $7 million per mile to put them underground."

The White House report says power outages cost the nation anywhere from $18 billion to $33 billion each year.

Storms in Arizona typically knock down a string of high-voltage wooden power poles. Garcia-Likens says utilities have seen improvements in prevention by replacing every fourth or fifth wooden pole with steel.

"When you have a pole go down, it doesn't stop at that point,” she says. “You know, a lot of times you have that domino effect. And we have found that if we put a steel pole every few poles, that actually stops it."

As for Arizona's top 10 ranking among the states for vehicle-caused power outages, Garcia-Likens says it's understandable given the state’s heavy dependence on cars. And she says the crashes don't always involve power poles.

"Every so often you've got what are called pad-mount transformers,” she explains. “And those sit above the ground. And those are also susceptible to vehicle accidents. And you'll find that cars will run into those as well."

Garcia-Likens says most new subdivisions have their power lines buried, with above-ground lines mostly in older neighborhoods. But again, she says going back to bury those lines would be extremely cost-prohibitive.




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