Geothermal company Zanskar has achieved a major turnaround at its Lightning Dock site in New Mexico, transforming a failing power plant into one of the most productive pumped geothermal wells in the United States, according to figures from the company shared exclusively with WIRED. After drilling a new 8,000-foot well and operating the 15-megawatt power plant for a full year, the site now provides enough heat to run the plant with no issues.
The Challenges at Lightning Dock
When Zanskar purchased the Lightning Dock site in 2024, the original wells—less than 2,500 feet deep—had lost heat rapidly. According to the company, the wells were losing between five and ten times as much heat each year as average geothermal wells. By 2024, temperatures had cooled some 50°F (10°C) to about 250°F, while the onsite power plant, which supplies electricity to New Mexico’s largest utility, was designed to operate at temperatures above 300°F. The shallow wells were failing, and the plant was having trouble generating power.
| Metric | Before (2024) | After (New Well) |
|---|---|---|
| Well depth | <2,500 ft | 8,000 ft |
| Temperature | ~250°F | Maintained above 300°F (heat levels above pre-decline) |
| Productivity | Declining rapidly | Most productive pumped well in US |
The success at Lightning Dock “fundamentally changes how people think about these types of systems that we really thought we understood in the past,” said Joel Edwards, cofounder of Zanskar, in a statement to WIRED.
Technology and AI Role
To revive the site, Zanskar employed artificial intelligence to identify hidden geothermal systems—sites with ample potential but little surface evidence. The same modeling that led to a discovery in Nevada last year also pinpointed the optimal drilling location at Lightning Dock. The company combined these models with drill bit technology refined by the oil and gas industry, which enabled drilling 35 percent faster at what it describes as a “competitive cost.” (Specific cost figures were not provided.) The new well reaches 8,000 feet deep, much deeper than conventional geothermal wells, which usually go down 3,000 to 5,000 feet.
“We knew that if we were going to buy this field, we were committed to drilling deeper and going after it,” Edwards said. The new well has been operating for a full year, with heat levels above where they were before the decline. Edwards noted that on occasion, the well supplied “too much heat” to the existing power plant.
Roland Horne, a senior fellow at the Precourt Institute for Energy at Stanford University, noted that the economics of drilling deeper are a key consideration. “If you drill twice as deep, it costs four times as much,” Horne said, emphasizing that cost is not linear.
Implications for the Geothermal Industry
Geothermal energy currently makes up less than 1 percent of the US electricity mix, constrained by geography and the difficulty of finding new wells. Many wells see gradual productivity declines, but Lightning Dock’s rapid decline had been particularly steep. Zanskar’s success demonstrates that older, seemingly exhausted sites may still hold significant potential. “It’s a wake-up call that old well sites are still worth further exploration,” the company said.
This achievement is the latest in a series of positive developments for the long-neglected geothermal industry, which is experiencing an investment renaissance. While not all conventional wells may have the same favorable conditions as Lightning Dock, the combination of AI modeling, advanced drilling technology, and a willingness to go deeper could unlock additional reserves. For commodity analysts and energy traders, the revival of a failing geothermal asset highlights the growing viability of geothermal as a reliable baseload renewable energy source, potentially influencing future power purchase agreements and energy mix forecasts.
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