turner's legacy

In final State of the City speech, Houston mayor addresses resiliency, energy transition efforts

"I am proud of the city that I shall pass forward." Photo courtesy of the city of Houston

For his eighth and final time, Mayor Sylvester Turner delivered the State of the City address last week, and he highlighted some of the gains within his tenure.

"We are greener, more compassionate, more united, and more forward-moving than we can ever imagine," says Mayor Turner. “What I can say to Houstonians is that I have given you my best, and I am proud of the city that I shall pass forward.”

At the event, which boasted a sold-out crowd of 1,500 Houstonians, Mayor turned announced some of the initiatives he's most proud of accomplishing and revealed release of “A Winning Legacy,” a book detailing his legacy.

“Together, we have faced many storms – seven federally declared disasters in eight years. From floods or a freeze, from a Super Bowl or the pandemic, we rose and met the challenges of our times,” says the mayor in his speech. “From inequities in neighborhoods investments to billions of dollars in pension unfunded liabilities, from One Safe Houston to One Clean Houston, we confronted each issue head on and set the city on firmer footing.”

Mayor Turner goes on to name the other storms that hit Houston during his tenure, and how resiliency and the energy transition became major themes of this office.

"We are the energy capital of the world," he says to the crowd. "We purchase more renewable energy than any other city in the United States. ... We lead the country in renewables."

In the address, Mayor Turner mentions his work on a project, announced last year, to convert a former landfill into a solar farm.

"The Sunnyside Solar Farm, which will be the largest urban solar farm in the country, will be operational by 2024," he says.

Mayor Turner wraps up his speech, which is available in its entirety on the city's YouTube page, with noting that he is leaving the next mayor — who will be decided in next month's election — with a $420 million surplus. When Mayor Turner was elected in 2015, the city had a $160 million deficit.

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A View From HETI

A rendering of a Quaise Energy geothermal plant. Rendering via quaise.com

Houston-based Quaise Energy, a producer of utility-scale geothermal power, raised $134 million in a Series B round to advance its “superhot” geothermal power plant.

Climate-focused San Francisco-based investment firm Prelude Ventures led the round, with participation from JERA Co., Japan’s largest power generation company, and Idemitsu Kosan, one of Japan’s largest energy companies. Nearly all existing investors, including cleantech-focused investment firm Safar Partners, participated in the round.

“We have backed Quaise since the beginning because we believed accessing superhot rock would unlock geothermal energy at a scale the world has never seen,” Mark Cupta, managing director at Prelude Ventures, said in a press release.

The startup expects more equity and debt deals to close “imminently.” Quaise has raised $230 million since its founding in 2018.

Quaise says some of the fresh funding will go toward building the world’s first commercial-scale “superhot” geothermal power plant —Project Obsidian in central Oregon. In addition, Quaise is earmarking money for continued development and commercialization of its millimeter-wave drilling system toward depths exceeding 5 kilometers (about 16,400 feet).

Quaise uses a millimeter-wave drilling system developed at the Massachusetts Institute of Technology to remove rock at depths and temperatures that aren’t economically feasible with conventional drilling. With this technology, Quaise can reach rock at temperatures of around 570 degrees to 930 degrees in most places worldwide, enabling construction of geothermal systems that rival fossil fuels and nuclear energy in power density and that rival renewables in cost.

“Our ambition is to power civilization with Earth's most compelling energy source. This round takes us from field-proven technology to first commercial revenues,” Carlos Araque, co-founder, president and CEO of Quaise, added in the release.

Quaise has demonstrated the capability of its millimeter-wave drilling system at its Central Texas test site, drilling more than about 330 feet through granite in 2025—the first time the technology penetrated basement rock at full scale in the field. The company is approaching a depth of about 3,300 feet at the same site.

Construction of Project Obsidian is underway at Oregon’s Deschutes National Forest. The project, which has the potential to generate gigawatt-scale power, is slated to deliver electricity to the Pacific Northwest grid by 2030.

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