ALBUQUERQUE, N.M. — Pick any stretch of road slicing through the American Southwest. The sun beats down on the asphalt like nowhere else and heat waves distort the landscape.
It's here, in these open expanses, that experts say is a massive untapped source of energy that could meet the nation's growing needs. But only if developers can get it out of the desert.
Even as renewable power projects get a boost from the federal government, a lack of transmission lines prevent states such as New Mexico — where the sun shines more than 300 days a year — from converting the obvious potential into real watts that can charge smartphones and run air conditioners thousands of miles away.
Aside from Phoenix, the nation's sixth largest city, and Las Vegas, which glows around the clock, the region's rural stretches — the ideal places for acres of solar panels — have few energy demands. And sending solar power from there to population centers isn't as simple as loading coal into boxcars and shipping it cross country.
"We have incredible renewable energy resources," U.S. Energy Secretary Steven Chu said during a visit earlier this year to a solar research lab in New Mexico. "The bad news is they're where there are not many people. We need a distribution system that can accommodate that."
Transmission lines are key to developing the region's solar resources. The problem is existing lines are maxing out, especially as the push intensifies to bring online more renewable energy. Building new lines can take years or even decades of cutting through a tangle of bureaucracy.
Spanning some 200,000 miles, much of the nation's existing transmission system is aging and will need replacement before 2030, according to preliminary findings of a new Department of Energy study on transmission congestion.
President Barack Obama reminded the nation during the Democratic National Convention that renewable power sources will play a key role in his "all of the above" energy plan. And nearly 5 gigawatts of solar and wind projects — enough juice to run about 3 million homes — were fast-tracked this summer by the federal government.
The Obama administration has also sped up permitting and construction of seven proposed transmission projects in 12 states, but industry experts say reaching into rural areas to tap more renewable resources remains a big hurdle.
Transmission gridlock is looming on the horizon in sunny Arizona, where the state's transmission capacity would be overloaded by just half of the proposed projects currently in the works. In the Northeast, wind generation has already been curtailed due to a lack of transmission capacity, according to DOE researchers.
Utilities such as PacifiCorp, which serves more than 1.7 million customers in six Western states, are already pouring billions of dollars into transmission projects.
Hundreds of miles of lines are planned from Wyoming south to New Mexico and west to Arizona and Nevada, where nearly 7,500 megawatts of renewable energy requests are already in the queue.
By 2015, the industry nationwide is expected to spend around $66 billion on improving transmission reliability and building capacity, according to the Edison Electric Institute, an association of electric companies. But more would be needed to meet all of the nation's needs.
In New Mexico, there were 18 utility-scale solar projects in the pipeline during the last fiscal year compared to none in 2010. But major transmission proposals that would crisscross the state are still in the permitting phase.
Some progress has been made in the last two years, but the lofty goals set years ago by former Democratic Gov. Bill Richardson to develop megaprojects and make New Mexico the "solar capital" of the U.S. have yet to be realized. Part of it has to do with competition.
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